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+#!/usr/bin/perl -w
+#
+# webcollage, Copyright © 1999-2018 by Jamie Zawinski <jwz@jwz.org>
+# This program decorates the screen with random images from the web.
+# One satisfied customer described it as "a nonstop pop culture brainbath."
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation. No representations are made about the suitability of this
+# software for any purpose. It is provided "as is" without express or
+# implied warranty.
+
+
+# To run this as a display mode with xscreensaver, add this to `programs':
+#
+# webcollage --root
+# webcollage --root --filter 'vidwhacker --stdin --stdout'
+#
+#
+# You can see this in action at https://www.jwz.org/webcollage/ --
+# it auto-reloads about once a minute. To make a page similar to
+# that on your own system, do this:
+#
+# webcollage --size '800x600' --imagemap $HOME/www/webcollage/index
+#
+#
+# Requires that either the provided "webcollage-helper" program or
+# ImageMagick's "convert" be available on $PATH.
+#
+#
+# If you have the "driftnet" program installed, webcollage can display a
+# collage of images sniffed off your local ethernet, instead of pulled out
+# of search engines: in that way, your screensaver can display the images
+# that your co-workers are downloading!
+#
+# Driftnet is available here: http://www.ex-parrot.com/~chris/driftnet/
+# Use it like so:
+#
+# webcollage --root --driftnet
+#
+# Driftnet is the Unix implementation of the MacOS "EtherPEG" program.
+
+
+require 5;
+use strict;
+
+# We can't "use diagnostics" here, because that library malfunctions if
+# you signal and catch alarms: it says "Uncaught exception from user code"
+# and exits, even though I damned well AM catching it!
+#use diagnostics;
+
+
+require Time::Local;
+require POSIX;
+use Fcntl ':flock'; # import LOCK_* constants
+use POSIX qw(strftime);
+use LWP::UserAgent;
+
+
+my $progname = $0; $progname =~ s@.*/@@g;
+my ($version) = ('$Revision: 1.182 $' =~ m/\s(\d[.\d]+)\s/s);
+my $copyright = "WebCollage $version, Copyright (c) 1999-2017" .
+ " Jamie Zawinski <jwz\@jwz.org>\n" .
+ " https://www.jwz.org/webcollage/\n";
+
+
+
+my @search_methods = (
+ # Google is rate-limiting us now, so this works ok from
+ # a short-running screen saver, but not as a batch job.
+ # I haven't found a workaround.
+ #
+ 5, "googlephotos", \&pick_from_google_image_photos,
+ 3, "googleimgs", \&pick_from_google_images,
+ 3, "googlenums", \&pick_from_google_image_numbers,
+
+ # So let's try Bing instead. No rate limiting yet!
+ #
+ 13, "bingphotos", \&pick_from_bing_image_photos,
+ 11, "bingimgs", \&pick_from_bing_images,
+ 10, "bingnums", \&pick_from_bing_image_numbers,
+
+ 20, "flickr_recent", \&pick_from_flickr_recent,
+ 15, "flickr_random", \&pick_from_flickr_random,
+ 6, "livejournal", \&pick_from_livejournal_images,
+
+ 11, "imgur", \&pick_from_imgur,
+
+ # Tumblr doesn't have an "or" search, so this isn't great.
+ 3, "tumblr", \&pick_from_tumblr,
+
+ # I ran out of usable access tokens, May 2017
+ # 0, "instagram", \&pick_from_instagram,
+
+ # No longer exists, as of Apr 2014
+ # 0, "yahoorand", \&pick_from_yahoo_random_link,
+
+ # Twitter destroyed their whole API in 2013.
+ # 0, "twitpic", \&pick_from_twitpic_images,
+ # 0, "twitter", \&pick_from_twitter_images,
+
+ # This is a cute way to search for a certain webcams.
+ # Not included in default methods, since these images
+ # aren't terribly interesting by themselves.
+ # See also "SurveillanceSaver".
+ #
+ 0, "securitycam", \&pick_from_security_camera,
+
+ # Nonfunctional as of June 2011.
+ # 0, "altavista", \&pick_from_alta_vista_random_link,
+
+ # In Apr 2002, Google asked me to stop searching them.
+ # I asked them to add a "random link" url. They said
+ # "that would be easy, we'll think about it" and then
+ # never wrote back. Booo Google! Booooo! So, screw
+ # those turkeys, I've turned Google searching back on.
+ # I'm sure they can take it. (Jan 2005.)
+
+ # Jan 2005: Yahoo fucked up their search form so that
+ # it's no longer possible to do "or" searches on news
+ # images, so we rarely get any hits there any more.
+ #
+ # 0, "yahoonews", \&pick_from_yahoo_news_text,
+
+ # Dec 2004: the ircimages guy's server can't take the
+ # heat, so he started banning the webcollage user agent.
+ # I tried to convince him to add a lighter-weight page to
+ # support webcollage better, but he doesn't care.
+ #
+ # 0, "ircimages", \&pick_from_ircimages,
+
+ # Dec 2002: Alta Vista has a new "random link" URL now.
+ # They added it specifically to better support webcollage!
+ # That was super cool of them. This is how we used to do
+ # it, before:
+ #
+ # 0, "avimages", \&pick_from_alta_vista_images,
+ # 0, "avtext", \&pick_from_alta_vista_text,
+
+ # This broke in 2004. Eh, Lycos sucks anyway.
+ #
+ # 0, "lycos", \&pick_from_lycos_text,
+
+ # This broke in 2003, I think. I suspect Hotbot is
+ # actually the same search engine data as Lycos.
+ #
+ # 0, "hotbot", \&pick_from_hotbot_text,
+ );
+
+# programs we can use to write to the root window (tried in ascending order.)
+#
+my @root_displayers = (
+ "xscreensaver-getimage -root -file",
+ "chbg -once -xscreensaver -max_size 100",
+ "xv -root -quit -viewonly +noresetroot -quick24 -rmode 5" .
+ " -rfg black -rbg black",
+ "xli -quiet -onroot -center -border black",
+ "xloadimage -quiet -onroot -center -border black",
+
+# this lame program wasn't built with vroot.h:
+# "xsri -scale -keep-aspect -center-horizontal -center-vertical",
+);
+
+
+# Some sites need cookies to work properly. These are they.
+#
+my %cookies = (
+ "www.altavista.com" => "AV_ALL=1", # request uncensored searches
+ "web.altavista.com" => "AV_ALL=1",
+ "ircimages.com" => 'disclaimer=1',
+);
+
+
+# If this is set, it's a helper program to use for pasting images together:
+# this is somewhat faster than using ImageMagick.
+#
+my $webcollage_helper = undef;
+my $convert_cmd = 'convert';
+
+my $opacity = 0.85; # Opacity when pasting images together.
+
+
+# Some sites have managed to poison the search engines. These are they.
+# (We auto-detect sites that have poisoned the search engines via excessive
+# keywords or dictionary words, but these are ones that slip through
+# anyway.)
+#
+# This can contain full host names, or 2 or 3 component domains.
+#
+my %poisoners = (
+ "die.net" => 1, # 'l33t h4ck3r d00dz.
+ "genforum.genealogy.com" => 1, # Cluttering avtext with human names.
+ "rootsweb.com" => 1, # Cluttering avtext with human names.
+ "akamai.net" => 1, # Lots of sites have their images on Akamai.
+ "akamaitech.net" => 1, # But those are pretty much all banners.
+ # Since Akamai is super-expensive, let's
+ # go out on a limb and assume that all of
+ # their customers are rich-and-boring.
+ "bartleby.com" => 1, # Dictionary, cluttering avtext.
+ "encyclopedia.com" => 1, # Dictionary, cluttering avtext.
+ "onlinedictionary.datasegment.com" => 1, # Dictionary, cluttering avtext.
+ "hotlinkpics.com" => 1, # Porn site that has poisoned avimages
+ # (I don't see how they did it, though!)
+ "alwayshotels.com" => 1, # Poisoned Lycos pretty heavily.
+ "nextag.com" => 1, # Poisoned Alta Vista real good.
+ "ghettodriveby.com" => 1, # Poisoned Google Images.
+ "crosswordsolver.org" => 1, # Poisoned Google Images.
+ "xona.com" => 1, # Poisoned Google Images.
+ "freepatentsonline.com" => 1, # Poisoned Google Images.
+ "herbdatanz.com" => 1, # Poisoned Google Images.
+);
+
+
+# When verbosity is turned on, we warn about sites that we seem to be hitting
+# a lot: usually this means some new poisoner has made it into the search
+# engines. But sometimes, the warning is just because that site has a lot
+# of stuff on it. So these are the sites that are immune to the "frequent
+# site" diagnostic message.
+#
+my %warningless_sites = (
+ "home.earthlink.net" => 1,
+ "www.angelfire.com" => 1,
+ "members.aol.com" => 1,
+ "img.photobucket.com" => 1,
+ "pics.livejournal.com" => 1,
+ "tinypic.com" => 1,
+ "flickr.com" => 1,
+ "staticflickr.com" => 1,
+ "pbase.com" => 1,
+ "blogger.com" => 1,
+ "multiply.com" => 1,
+ "wikimedia.org" => 1,
+ "twitpic.com" => 1,
+ "amazonaws.com" => 1,
+ "blogspot.com" => 1,
+ "photoshelter.com" => 1,
+ "myspacecdn.com" => 1,
+ "feedburner.com" => 1,
+ "wikia.com" => 1,
+ "ljplus.ru" => 1,
+ "yandex.ru" => 1,
+ "imgur.com" => 1,
+ "tumblr.com" => 1,
+ "yfrog.com" => 1,
+ "cdninstagram.com" => 1,
+ "gstatic.com" => 1,
+
+ "yimg.com" => 1, # This is where dailynews.yahoo.com stores
+ "eimg.com" => 1, # its images, so pick_from_yahoo_news_text()
+ # hits this every time.
+
+ "images.quizfarm.com" => 1, # damn those LJ quizzes...
+ "images.quizilla.com" => 1,
+ "images.quizdiva.net" => 1,
+
+ "driftnet" => 1, # builtin...
+ "local-directory" => 1, # builtin...
+);
+
+
+# For decoding HTML-encoded character entities to URLs.
+# In This Modern World, probably we should use HTML::Entities instead.
+#
+my %entity_table = (
+ "apos" => '\'',
+ "quot" => '"', "amp" => '&', "lt" => '<',
+ "gt" => '>', "nbsp" => ' ', "iexcl" => '',
+ "cent" => "\xA2", "pound" => "\xA3", "curren" => "\xA4",
+ "yen" => "\xA5", "brvbar" => "\xA6", "sect" => "\xA7",
+ "uml" => "\xA8", "copy" => "\xA9", "ordf" => "\xAA",
+ "laquo" => "\xAB", "not" => "\xAC", "shy" => "\xAD",
+ "reg" => "\xAE", "macr" => "\xAF", "deg" => "\xB0",
+ "plusmn" => "\xB1", "sup2" => "\xB2", "sup3" => "\xB3",
+ "acute" => "\xB4", "micro" => "\xB5", "para" => "\xB6",
+ "middot" => "\xB7", "cedil" => "\xB8", "sup1" => "\xB9",
+ "ordm" => "\xBA", "raquo" => "\xBB", "frac14" => "\xBC",
+ "frac12" => "\xBD", "frac34" => "\xBE", "iquest" => "\xBF",
+ "Agrave" => "\xC0", "Aacute" => "\xC1", "Acirc" => "\xC2",
+ "Atilde" => "\xC3", "Auml" => "\xC4", "Aring" => "\xC5",
+ "AElig" => "\xC6", "Ccedil" => "\xC7", "Egrave" => "\xC8",
+ "Eacute" => "\xC9", "Ecirc" => "\xCA", "Euml" => "\xCB",
+ "Igrave" => "\xCC", "Iacute" => "\xCD", "Icirc" => "\xCE",
+ "Iuml" => "\xCF", "ETH" => "\xD0", "Ntilde" => "\xD1",
+ "Ograve" => "\xD2", "Oacute" => "\xD3", "Ocirc" => "\xD4",
+ "Otilde" => "\xD5", "Ouml" => "\xD6", "times" => "\xD7",
+ "Oslash" => "\xD8", "Ugrave" => "\xD9", "Uacute" => "\xDA",
+ "Ucirc" => "\xDB", "Uuml" => "\xDC", "Yacute" => "\xDD",
+ "THORN" => "\xDE", "szlig" => "\xDF", "agrave" => "\xE0",
+ "aacute" => "\xE1", "acirc" => "\xE2", "atilde" => "\xE3",
+ "auml" => "\xE4", "aring" => "\xE5", "aelig" => "\xE6",
+ "ccedil" => "\xE7", "egrave" => "\xE8", "eacute" => "\xE9",
+ "ecirc" => "\xEA", "euml" => "\xEB", "igrave" => "\xEC",
+ "iacute" => "\xED", "icirc" => "\xEE", "iuml" => "\xEF",
+ "eth" => "\xF0", "ntilde" => "\xF1", "ograve" => "\xF2",
+ "oacute" => "\xF3", "ocirc" => "\xF4", "otilde" => "\xF5",
+ "ouml" => "\xF6", "divide" => "\xF7", "oslash" => "\xF8",
+ "ugrave" => "\xF9", "uacute" => "\xFA", "ucirc" => "\xFB",
+ "uuml" => "\xFC", "yacute" => "\xFD", "thorn" => "\xFE",
+ "yuml" => "\xFF",
+
+ # HTML 4 entities that do not have 1:1 Latin1 mappings.
+ "bull" => "*", "hellip"=> "...", "prime" => "'", "Prime" => "\"",
+ "frasl" => "/", "trade" => "[tm]", "larr" => "<-", "rarr" => "->",
+ "harr" => "<->", "lArr" => "<=", "rArr" => "=>", "hArr" => "<=>",
+ "empty" => "\xD8", "minus" => "-", "lowast"=> "*", "sim" => "~",
+ "cong" => "=~", "asymp" => "~", "ne" => "!=", "equiv" => "==",
+ "le" => "<=", "ge" => ">=", "lang" => "<", "rang" => ">",
+ "loz" => "<>", "OElig" => "OE", "oelig" => "oe", "Yuml" => "Y",
+ "circ" => "^", "tilde" => "~", "ensp" => " ", "emsp" => " ",
+ "thinsp"=> " ", "ndash" => "-", "mdash" => "--", "lsquo" => "`",
+ "rsquo" => "'", "sbquo" => "'", "ldquo" => "\"", "rdquo" => "\"",
+ "bdquo" => "\"", "lsaquo"=> "<", "rsaquo"=> ">",
+);
+
+
+##############################################################################
+#
+# Various global flags set by command line parameters, or computed
+#
+##############################################################################
+
+
+my $current_state = "???"; # for diagnostics
+my $load_method;
+my $last_search;
+my $image_succeeded = -1;
+my $suppress_audit = 0;
+
+my $verbose_imgmap = 0; # print out rectangles and URLs only (stdout)
+my $verbose_warnings = 0; # print out warnings when things go wrong
+my $verbose_load = 0; # diagnostics about loading of URLs
+my $verbose_filter = 0; # diagnostics about page selection/rejection
+my $verbose_net = 0; # diagnostics about network I/O
+my $verbose_decode = 0; # diagnostics about img conversion pipelines
+my $verbose_http = 0; # diagnostics about all HTTP activity
+my $verbose_exec = 0; # diagnostics about executing programs
+
+my $report_performance_interval = 60 * 15; # print some stats every 15 minutes
+
+my $http_proxy = undef;
+my $http_timeout = 20;
+my $cvt_timeout = 10;
+
+my $min_width = 50;
+my $min_height = 50;
+my $min_ratio = 1/5;
+
+my $min_gif_area = (120 * 120);
+
+
+my $no_output_p = 0;
+my $urls_only_p = 0;
+my $cocoa_p = 0;
+my $imagemap_base = undef;
+
+my @pids_to_kill = (); # forked pids we should kill when we exit, if any.
+
+my $driftnet_magic = 'driftnet';
+my $driftnet_dir = undef;
+my $default_driftnet_cmd = "driftnet -a -m 100";
+
+my $local_magic = 'local-directory';
+my $local_dir = undef;
+
+my $wordlist;
+
+my %rejected_urls;
+my @tripwire_words = ("aberrate", "abode", "amorphous", "antioch",
+ "arrhenius", "arteriole", "blanket", "brainchild",
+ "burdensome", "carnival", "cherub", "chord", "clever",
+ "dedicate", "dilogarithm", "dolan", "dryden",
+ "eggplant");
+
+
+##############################################################################
+#
+# Retrieving URLs
+#
+##############################################################################
+
+# returns three values: the HTTP response line; the document headers;
+# and the document body.
+#
+sub get_document_1($$$) {
+ my ($url, $referer, $timeout) = @_;
+
+ if (!defined($timeout)) { $timeout = $http_timeout; }
+ if ($timeout > $http_timeout) { $timeout = $http_timeout; }
+
+ my $user_agent = "$progname/$version";
+
+ if ($url =~ m@^https?://www\.altavista\.com/@s ||
+ $url =~ m@^https?://random\.yahoo\.com/@s ||
+ $url =~ m@^https?://[^./]+\.google\.com/@s ||
+ $url =~ m@^https?://www\.livejournal\.com/@s) {
+ # block this, you turkeys.
+ $user_agent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.7)' .
+ ' Gecko/20070914 Firefox/2.0.0.7';
+ }
+
+ my $ua = LWP::UserAgent->new ( agent => $user_agent,
+ keep_alive => 0,
+ env_proxy => 0,
+ );
+ $ua->proxy ('http', $http_proxy) if $http_proxy;
+ $ua->default_header ('Referer' => $referer) if $referer;
+ $ua->default_header ('Accept' => '*/*');
+ $ua->timeout($timeout) if $timeout;
+
+ if (0) {
+ $ua->add_handler ("request_send",
+ sub($$$) {
+ my ($req, $ua, $h) = @_;
+ print "\n>>[[\n"; $req->dump; print "\n]]\n";
+ return;
+ });
+ $ua->add_handler ("response_data",
+ sub($$$$) {
+ my ($req, $ua, $h, $data) = @_;
+ #print "\n<<[[\n"; print $data; print "\n]]\n";
+ return 1;
+ });
+ $ua->add_handler ("request_done",
+ sub($$$) {
+ my ($req, $ua, $h) = @_;
+ print "\n<<[[\n"; $req->dump; print "\n]]\n";
+ return;
+ });
+ }
+
+ if ($verbose_http) {
+ LOG (1, " ==> GET $url");
+ LOG (1, " ==> User-Agent: $user_agent");
+ LOG (1, " ==> Referer: $referer") if $referer;
+ }
+
+ my $res = $ua->get ($url);
+
+ my $http = ($res ? $res->status_line : '') || '';
+ my $head = ($res ? $res->headers() : '') || '';
+ $head = $head->as_string() if $head;
+ my $body = ($res && $res->is_success ? $res->decoded_content : '') || '';
+
+ LOG ($verbose_net, "get_document_1 $url " . ($referer ? $referer : ""));
+
+ $head =~ s/\r\n/\n/gs;
+ $head =~ s/\r/\n/gs;
+ if ($verbose_http) {
+ foreach (split (/\n/, $head)) {
+ LOG ($verbose_http, " <== $_");
+ }
+ }
+
+ my @L = split(/\r\n|\r|\n/, $body);
+ my $lines = @L;
+ LOG ($verbose_http,
+ " <== [ body ]: $lines lines, " . length($body) . " bytes");
+
+ if (!$http) {
+ LOG (($verbose_net || $verbose_load), "null response: $url");
+ return ();
+ }
+
+ return ( $http, $head, $body );
+}
+
+
+# returns two values: the document headers; and the document body.
+# if the given URL did a redirect, returns the redirected-to document.
+#
+sub get_document($$;$) {
+ my ($url, $referer, $timeout) = @_;
+ my $start = time;
+
+ if (defined($referer) && $referer eq $driftnet_magic) {
+ return get_driftnet_file ($url);
+ }
+
+ if (defined($referer) && $referer eq $local_magic) {
+ return get_local_file ($url);
+ }
+
+ my $orig_url = $url;
+ my $loop_count = 0;
+ my $max_loop_count = 4;
+
+ do {
+ if (defined($timeout) && $timeout <= 0) {
+ LOG (($verbose_net || $verbose_load), "timed out for $url");
+ $suppress_audit = 1;
+ return ();
+ }
+
+ my ( $http, $head, $body ) = get_document_1 ($url, $referer, $timeout);
+
+ if (defined ($timeout)) {
+ my $now = time;
+ my $elapsed = $now - $start;
+ $timeout -= $elapsed;
+ $start = $now;
+ }
+
+ return () unless $http; # error message already printed
+
+ $http =~ s/[\r\n]+$//s;
+
+ if ( $http =~ m@^HTTP/[0-9.]+ 30[123]@ ) {
+ $_ = $head;
+
+ my ( $location ) = m@^location:[ \t]*(.*)$@im;
+ if ( $location ) {
+ $location =~ s/[\r\n]$//;
+
+ LOG ($verbose_net, "redirect from $url to $location");
+ $referer = $url;
+ $url = $location;
+
+ if ($url =~ m@^/@) {
+ $referer =~ m@^(https?://[^/]+)@i;
+ $url = $1 . $url;
+ } elsif (! ($url =~ m@^[a-z]+:@i)) {
+ $_ = $referer;
+ s@[^/]+$@@g if m@^https?://[^/]+/@i;
+ $_ .= "/" if m@^https?://[^/]+$@i;
+ $url = $_ . $url;
+ }
+
+ } else {
+ LOG ($verbose_net, "no Location with \"$http\"");
+ return ( $url, $body );
+ }
+
+ if ($loop_count++ > $max_loop_count) {
+ LOG ($verbose_net,
+ "too many redirects ($max_loop_count) from $orig_url");
+ $body = undef;
+ return ();
+ }
+
+ } elsif ( $http =~ m@^HTTP/[0-9.]+ ([4-9][0-9][0-9].*)$@ ) {
+
+ LOG (($verbose_net || $verbose_load), "failed: $1 ($url)");
+
+ # http errors -- return nothing.
+ $body = undef;
+ return ();
+
+ } elsif (!$body) {
+
+ LOG (($verbose_net || $verbose_load), "document contains no data: $url");
+ return ();
+
+ } else {
+
+ # ok!
+ return ( $url, $body );
+ }
+
+ } while (1);
+}
+
+# If we already have a cookie defined for this site, and the site is trying
+# to overwrite that very same cookie, let it do so. This is because nytimes
+# expires its cookies - it lets you upgrade to a new cookie without logging
+# in again, but you have to present the old cookie to get the new cookie.
+# So, by doing this, the built-in cypherpunks cookie will never go "stale".
+#
+sub set_cookie($$) {
+ my ($host, $cookie) = @_;
+ my $oc = $cookies{$host};
+ return unless $oc;
+ $_ = $oc;
+ my ($oc_name, $oc_value) = m@^([^= \t\r\n]+)=(.*)$@;
+ $_ = $cookie;
+ my ($nc_name, $nc_value) = m@^([^= \t\r\n]+)=(.*)$@;
+
+ if ($oc_name eq $nc_name &&
+ $oc_value ne $nc_value) {
+ $cookies{$host} = $cookie;
+ LOG ($verbose_net, "overwrote ${host}'s $oc_name cookie");
+ }
+}
+
+
+############################################################################
+#
+# Extracting image URLs from HTML
+#
+############################################################################
+
+# given a URL and the body text at that URL, selects and returns a random
+# image from it. returns () if no suitable images found.
+#
+sub pick_image_from_body($$) {
+ my ($url, $body) = @_;
+
+ my $base = $url;
+ $_ = $url;
+
+ # if there's at least one slash after the host, take off the last
+ # pathname component
+ if ( m@^https?://[^/]+/@io ) {
+ $base =~ s@[^/]+$@@go;
+ }
+
+ # if there are no slashes after the host at all, put one on the end.
+ if ( m@^https?://[^/]+$@io ) {
+ $base .= "/";
+ }
+
+ $_ = $body;
+
+ # strip out newlines, compress whitespace
+ s/[\r\n\t ]+/ /go;
+
+ # nuke comments
+ s/<!--.*?-->//go;
+
+
+ # There are certain web sites that list huge numbers of dictionary
+ # words in their bodies or in their <META NAME=KEYWORDS> tags (surprise!
+ # Porn sites tend not to be reputable!)
+ #
+ # I do not want webcollage to filter on content: I want it to select
+ # randomly from the set of images on the web. All the logic here for
+ # rejecting some images is really a set of heuristics for rejecting
+ # images that are not really images: for rejecting *text* that is in
+ # GIF/JPEG/PNG form. I don't want text, I want pictures, and I want
+ # the content of the pictures to be randomly selected from among all
+ # the available content.
+ #
+ # So, filtering out "dirty" pictures by looking for "dirty" keywords
+ # would be wrong: dirty pictures exist, like it or not, so webcollage
+ # should be able to select them.
+ #
+ # However, picking a random URL is a hard thing to do. The mechanism I'm
+ # using is to search for a selection of random words. This is not
+ # perfect, but works ok most of the time. The way it breaks down is when
+ # some URLs get precedence because their pages list *every word* as
+ # related -- those URLs come up more often than others.
+ #
+ # So, after we've retrieved a URL, if it has too many keywords, reject
+ # it. We reject it not on the basis of what those keywords are, but on
+ # the basis that by having so many, the page has gotten an unfair
+ # advantage against our randomizer.
+ #
+ my $trip_count = 0;
+ foreach my $trip (@tripwire_words) {
+ $trip_count++ if m/$trip/i;
+ }
+
+ if ($trip_count >= $#tripwire_words - 2) {
+ LOG (($verbose_filter || $verbose_load),
+ "there is probably a dictionary in \"$url\": rejecting.");
+ $rejected_urls{$url} = -1;
+ $body = undef;
+ $_ = undef;
+ return ();
+ }
+
+
+ my @urls;
+ my %unique_urls;
+
+ foreach (split(/ *</)) {
+ if ( m/^meta.*["']keywords["']/i ) {
+
+ # Likewise, reject any web pages that have a KEYWORDS meta tag
+ # that is too long.
+ #
+ my $L = length($_);
+ if ($L > 1000) {
+ LOG (($verbose_filter || $verbose_load),
+ "excessive keywords ($L bytes) in $url: rejecting.");
+ $rejected_urls{$url} = $L;
+ $body = undef;
+ $_ = undef;
+ return ();
+ } else {
+ LOG ($verbose_filter, " keywords ($L bytes) in $url (ok)");
+ }
+
+ } elsif (m/^ (IMG|A) \b .* (SRC|HREF) \s* = \s* ["']? (.*?) [ "'<>] /six ||
+ m/^ (LINK|META) \b .* (REL|PROPERTY) \s* = \s*
+ ["']? (image_src|og:image) ["']? /six) {
+
+ my $was_inline = (lc($1) eq 'img');
+ my $was_meta = (lc($1) eq 'link' || lc($1) eq 'meta');
+ my $link = $3;
+
+ # For <link rel="image_src" href="...">
+ # and <meta property="og:image" content="...">
+ #
+ if ($was_meta) {
+ next unless (m/ (HREF|CONTENT) \s* = \s* ["']? (.*?) [ "'<>] /six);
+ $link = $2;
+ }
+
+ my ( $width ) = m/width ?=[ \"]*(\d+)/oi;
+ my ( $height ) = m/height ?=[ \"]*(\d+)/oi;
+ $_ = $link;
+
+ if ( m@^/@o ) {
+ my $site;
+ ( $site = $base ) =~ s@^(https?://[^/]*).*@$1@gio;
+ $_ = "$site$link";
+ } elsif ( ! m@^[^/:?]+:@ ) {
+ $_ = "$base$link";
+ s@/\./@/@g;
+ 1 while (s@/[^/]+/\.\./@/@g);
+ }
+
+ # skip non-http
+ if ( ! m@^https?://@io ) {
+ next;
+ }
+
+ # skip non-image
+ if ( ! m@[.](gif|jpg|jpeg|pjpg|pjpeg|png)$@io ) {
+ next;
+ }
+
+ # skip really short or really narrow images
+ if ( $width && $width < $min_width) {
+ if (!$height) { $height = "?"; }
+ LOG ($verbose_filter, " skip narrow image $_ (${width}x$height)");
+ next;
+ }
+
+ if ( $height && $height < $min_height) {
+ if (!$width) { $width = "?"; }
+ LOG ($verbose_filter, " skip short image $_ (${width}x$height)");
+ next;
+ }
+
+ # skip images with ratios that make them look like banners.
+ if ($min_ratio && $width && $height &&
+ ($width * $min_ratio ) > $height) {
+ if (!$height) { $height = "?"; }
+ LOG ($verbose_filter, " skip bad ratio $_ (${width}x$height)");
+ next;
+ }
+
+ # skip GIFs with a small number of pixels -- those usually suck.
+ if ($width && $height &&
+ m/\.gif$/io &&
+ ($width * $height) < $min_gif_area) {
+ LOG ($verbose_filter, " skip small GIF $_ (${width}x$height)");
+ next;
+ }
+
+ # skip images with a URL that indicates a Yahoo thumbnail.
+ if (m@\.yimg\.com/.*/t/@) {
+ if (!$width) { $width = "?"; }
+ if (!$height) { $height = "?"; }
+ LOG ($verbose_filter, " skip yahoo thumb $_ (${width}x$height)");
+ next;
+ }
+
+ my $url = $_;
+
+ if ($unique_urls{$url}) {
+ LOG ($verbose_filter, " skip duplicate image $_");
+ next;
+ }
+
+ LOG ($verbose_filter,
+ " image $url" .
+ ($width && $height ? " (${width}x${height})" : "") .
+ ($was_meta ? " (meta)" : $was_inline ? " (inline)" : ""));
+
+
+ my $weight = 1;
+
+ if ($was_meta) {
+ $weight = 20; # meta tag images are far preferable to inline images.
+ } else {
+ if ($url !~ m@[.](gif|png)$@io ) {
+ $weight += 2; # JPEGs are preferable to GIFs and PNGs.
+ }
+ if (! $was_inline) {
+ $weight += 4; # pointers to images are preferable to inlined images.
+ }
+ }
+
+ $unique_urls{$url}++;
+ for (my $i = 0; $i < $weight; $i++) {
+ $urls[++$#urls] = $url;
+ }
+ }
+ }
+
+ my $fsp = ($body =~ m@<frameset@i);
+
+ $_ = undef;
+ $body = undef;
+
+ @urls = depoison (@urls);
+
+ if ( $#urls < 0 ) {
+ LOG ($verbose_load, "no images on $base" . ($fsp ? " (frameset)" : ""));
+ return ();
+ }
+
+ # pick a random element of the table
+ my $i = int(rand($#urls+1));
+ $url = $urls[$i];
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/" . ($#urls+1) . ": $url");
+
+ return $url;
+}
+
+
+# Given a URL and the RSS feed from that URL, pick a random image from
+# the feed. This is a lot simpler than extracting images out of a page:
+# we already know we have reasonable images, so we just pick one.
+# Returns: the real URL of the page (preferably not the RSS version),
+# and the image.
+
+sub pick_image_from_rss($$) {
+ my ($url, $body) = @_;
+
+ my ($base) = ($body =~ m@<link>([^<>]+)</link>@si); # root link
+
+ my @items = ($body =~ m@<item\b[^<>]*>(.*?)</item>@gsi);
+ return unless @items;
+
+ my $n = @items;
+ my $i = int(rand($n));
+ my $item = $items[$i];
+
+ $base = $1 if ($item =~ m@<link>([^<>]+)</link>@si); # item link
+ $base = $url unless $base;
+
+ ($url) = ($item =~ m/<enclosure\b[^<>]*\burl="(.*?)"/si);
+ return unless $url;
+
+ LOG ($verbose_load, "picked image $i/$n: $url");
+ return ($base, $url);
+}
+
+
+############################################################################
+#
+# Subroutines for getting pages and images out of search engines
+#
+############################################################################
+
+
+sub pick_dictionary() {
+ my @dicts = ("/usr/dict/words",
+ "/usr/share/dict/words",
+ "/usr/share/lib/dict/words",
+ "/usr/share/dict/cracklib-small",
+ "/usr/share/dict/cracklib-words"
+ );
+ foreach my $f (@dicts) {
+ if (-f $f) {
+ $wordlist = $f;
+ last;
+ }
+ }
+ error ("$dicts[0] does not exist") unless defined($wordlist);
+}
+
+# returns a random word from the dictionary
+#
+sub random_word() {
+
+ return undef unless open (my $in, '<', $wordlist);
+
+ my $size = (stat($in))[7];
+ my $word = undef;
+ my $count = 0;
+
+ while (1) {
+ error ("looping ($count) while reading $wordlist")
+ if (++$count > 100);
+
+ my $pos = int (rand ($size));
+ if (seek ($in, $pos, 0)) {
+ $word = <$in>; # toss partial line
+ $word = <$in>; # keep next line
+ }
+
+ next unless ($word);
+ next if ($word =~ m/^[-\']/);
+
+ $word = lc($word);
+ $word =~ s/^.*-//s;
+ $word =~ s/^[^a-z]+//s;
+ $word =~ s/[^a-z]+$//s;
+ $word =~ s/\'s$//s;
+ $word =~ s/ys$/y/s;
+ $word =~ s/ally$//s;
+ $word =~ s/ly$//s;
+ $word =~ s/ies$/y/s;
+ $word =~ s/ally$/al/s;
+ $word =~ s/izes$/ize/s;
+ $word =~ s/esses$/ess/s;
+ $word =~ s/(.{5})ing$/$1/s;
+
+ next if (length ($word) > 14);
+ last if ($word);
+ }
+
+ close ($in);
+
+ if ( $word =~ s/\s/\+/gs ) { # convert intra-word spaces to "+".
+ $word = "\%22$word\%22"; # And put quotes (%22) around it.
+ }
+
+ return $word;
+}
+
+
+sub random_words($) {
+ my ($sep) = @_;
+ return (random_word() . $sep .
+ random_word() . $sep .
+ random_word() . $sep .
+ random_word() . $sep .
+ random_word());
+}
+
+
+sub url_quote($) {
+ my ($s) = @_;
+ $s =~ s|([^-a-zA-Z0-9.\@/_\r\n])|sprintf("%%%02X", ord($1))|ge;
+ return $s;
+}
+
+sub url_unquote($) {
+ my ($s) = @_;
+ $s =~ s/[+]/ /g;
+ $s =~ s/%([a-z0-9]{2})/chr(hex($1))/ige;
+ return $s;
+}
+
+sub html_quote($) {
+ my ($s) = @_;
+ $s =~ s/&/&amp;/gi;
+ $s =~ s/</&lt;/gi;
+ $s =~ s/>/&gt;/gi;
+ $s =~ s/\"/&quot;/gi;
+ return $s;
+}
+
+sub html_unquote($) {
+ my ($s) = @_;
+ $s =~ s/(&([a-z]+);)/{ $entity_table{$2} || $1; }/gexi; # e.g., &apos;
+ $s =~ s/(&\#(\d+);)/{ chr($2) }/gexi; # e.g., &#39;
+ return $s;
+}
+
+
+# Loads the given URL (a search on some search engine) and returns:
+# - the total number of hits the search engine claimed it had;
+# - a list of URLs from the page that the search engine returned;
+# Note that this list contains all kinds of internal search engine
+# junk URLs too -- caller must prune them.
+#
+sub pick_from_search_engine($$$) {
+ my ( $timeout, $search_url, $words ) = @_;
+
+ $_ = $words;
+ s/%20/ /g;
+
+ print STDERR "\n\n" if ($verbose_load);
+
+ LOG ($verbose_load, "words: $_");
+ LOG ($verbose_load, "URL: $search_url");
+
+ $last_search = $search_url; # for warnings
+
+ my $start = time;
+ my ( $base, $body ) = get_document ($search_url, undef, $timeout);
+ if (defined ($timeout)) {
+ $timeout -= (time - $start);
+ if ($timeout <= 0) {
+ $body = undef;
+ LOG (($verbose_net || $verbose_load),
+ "timed out (late) for $search_url");
+ $suppress_audit = 1;
+ return ();
+ }
+ }
+
+ return () if (! $body);
+
+
+ my @subpages;
+
+ my $search_count = "?";
+ if ($body =~ m@found (approximately |about )?(<B>)?(\d+)(</B>)? image@) {
+ $search_count = $3;
+ } elsif ($body =~ m@<NOBR>((\d{1,3})(,\d{3})*)&nbsp;@i) {
+ $search_count = $1;
+ } elsif ($body =~ m@found ((\d{1,3})(,\d{3})*|\d+) Web p@) {
+ $search_count = $1;
+ } elsif ($body =~ m@found about ((\d{1,3})(,\d{3})*|\d+) results@) {
+ $search_count = $1;
+ } elsif ($body =~ m@\b\d+ - \d+ of (\d+)\b@i) { # avimages
+ $search_count = $1;
+ } elsif ($body =~ m@About ((\d{1,3})(,\d{3})*) images@i) { # avimages
+ $search_count = $1;
+ } elsif ($body =~ m@We found ((\d{1,3})(,\d{3})*|\d+) results@i) { # *vista
+ $search_count = $1;
+ } elsif ($body =~ m@ of about <B>((\d{1,3})(,\d{3})*)<@i) { # googleimages
+ $search_count = $1;
+ } elsif ($body =~ m@<B>((\d{1,3})(,\d{3})*)</B> Web sites were found@i) {
+ $search_count = $1; # lycos
+ } elsif ($body =~ m@WEB.*?RESULTS.*?\b((\d{1,3})(,\d{3})*)\b.*?Matches@i) {
+ $search_count = $1; # hotbot
+ } elsif ($body =~ m@no photos were found containing@i) { # avimages
+ $search_count = "0";
+ } elsif ($body =~ m@found no document matching@i) { # avtext
+ $search_count = "0";
+ }
+ 1 while ($search_count =~ s/^(\d+)(\d{3})/$1,$2/);
+
+# if ($search_count eq "?" || $search_count eq "0") {
+# my $file = "/tmp/wc.html";
+# open (my $out, '>', $file) || error ("writing $file: $!");
+# print $out $body;
+# close $out;
+# print STDERR blurb() . "###### wrote $file\n";
+# }
+
+
+ my $length = length($body);
+ my $href_count = 0;
+
+ $_ = $body;
+
+ s/[\r\n\t ]+/ /g;
+
+
+ s/(<A )/\n$1/gi;
+ foreach (split(/\n/)) {
+ $href_count++;
+ my ($u) = m@<A\s.*?\bHREF\s*=\s*([\"\'][^\"\'<>]+)@i;
+ next unless $u;
+ my ($u2) = m@<IMG\s.*\bSRC\s*=\s*[\"\']([^\"\'<>]+)@i;
+
+ if (m/\bm="\{(.*?)\}"/s) { # Bing info is inside JSON crud
+ my $json = html_unquote($1);
+ my ($href) = ($json =~ m/\b(?:surl|purl)\"?:\s*"(.*?)"/s);
+ my ($img) = ($json =~ m/\b(?:imgurl|murl)\"?:\s*"(.*?)"/s);
+ $u = "$img\t$href" if ($img && $href);
+
+ } elsif ($u2 && $u2 =~ m@://[^/]*\.gstatic\.com/@s) { $u = $u2;
+ $u =~ s/^\"|\"$//s;
+
+ } elsif ($u =~ m/^\"([^\"]*)\"/) { $u = $1 # quoted string
+ } elsif ($u =~ m/^([^\s]*)\s/) { $u = $1; # or token
+ }
+
+ if ( $rejected_urls{$u} ) {
+ LOG ($verbose_filter, " pre-rejecting candidate: $u");
+ next;
+ }
+
+ LOG ($verbose_http, " HREF: $u");
+
+ $subpages[++$#subpages] = $u;
+ }
+
+ if ( $#subpages < 0 ) {
+ LOG ($verbose_filter,
+ "found nothing on $base ($length bytes, $href_count links).");
+ return ();
+ }
+
+ LOG ($verbose_filter, "" . $#subpages+1 . " links on $search_url");
+
+ return ($search_count, @subpages);
+}
+
+
+sub depoison(@) {
+ my (@urls) = @_;
+ my @urls2 = ();
+ foreach (@urls) {
+ my ($h) = m@^https?://([^/: \t\r\n]+)@i;
+
+ next unless defined($h);
+
+ if ($poisoners{$h}) {
+ LOG (($verbose_filter), " rejecting poisoner: $_");
+ next;
+ }
+ if ($h =~ m@([^.]+\.[^.]+\.[^.]+)$@ &&
+ $poisoners{$1}) {
+ LOG (($verbose_filter), " rejecting poisoner: $_");
+ next;
+ }
+ if ($h =~ m@([^.]+\.[^.]+)$@ &&
+ $poisoners{$1}) {
+ LOG (($verbose_filter), " rejecting poisoner: $_");
+ next;
+ }
+
+ push @urls2, $_;
+ }
+ return @urls2;
+}
+
+
+# given a list of URLs, picks one at random; loads it; and returns a
+# random image from it.
+# returns the url of the page loaded; the url of the image chosen.
+#
+sub pick_image_from_pages($$$$@) {
+ my ($base, $total_hit_count, $unfiltered_link_count, $timeout, @pages) = @_;
+
+ $total_hit_count = "?" unless defined($total_hit_count);
+
+ @pages = depoison (@pages);
+ LOG ($verbose_load,
+ "" . ($#pages+1) . " candidates of $unfiltered_link_count links" .
+ " ($total_hit_count total)");
+
+ return () if ($#pages < 0);
+
+ my $i = int(rand($#pages+1));
+ my $page = $pages[$i];
+
+ LOG ($verbose_load, "picked page $page");
+
+ $suppress_audit = 1;
+
+ my ( $base2, $body2 ) = get_document ($page, $base, $timeout);
+
+ if (!$base2 || !$body2) {
+ $body2 = undef;
+ return ();
+ }
+
+ my $img = pick_image_from_body ($base2, $body2);
+ $body2 = undef;
+
+ if ($img) {
+ return ($base2, $img);
+ } else {
+ return ();
+ }
+}
+
+
+#############################################################################
+##
+## Pick images from random pages returned by the Yahoo Random Link
+##
+#############################################################################
+#
+## yahoorand
+#my $yahoo_random_link = "http://random.yahoo.com/fast/ryl";
+#
+#
+# Picks a random page; picks a random image on that page;
+# returns two URLs: the page containing the image, and the image.
+# Returns () if nothing found this time.
+#
+#sub pick_from_yahoo_random_link($) {
+# my ($timeout) = @_;
+#
+# print STDERR "\n\n" if ($verbose_load);
+# LOG ($verbose_load, "URL: $yahoo_random_link");
+#
+# $last_search = $yahoo_random_link; # for warnings
+#
+# $suppress_audit = 1;
+#
+# my ( $base, $body ) = get_document ($yahoo_random_link, undef, $timeout);
+# if (!$base || !$body) {
+# $body = undef;
+# return;
+# }
+#
+# LOG ($verbose_load, "redirected to: $base");
+#
+# my $img = pick_image_from_body ($base, $body);
+# $body = undef;
+#
+# if ($img) {
+# return ($base, $img);
+# } else {
+# return ();
+# }
+#}
+
+
+############################################################################
+#
+# Pick images from random pages returned by the Alta Vista Random Link
+# Note: this seems to have gotten a *lot* less random lately (2007).
+#
+############################################################################
+
+# altavista
+my $alta_vista_random_link = "http://www.altavista.com/image/randomlink";
+
+
+# Picks a random page; picks a random image on that page;
+# returns two URLs: the page containing the image, and the image.
+# Returns () if nothing found this time.
+#
+sub pick_from_alta_vista_random_link($) {
+ my ($timeout) = @_;
+
+ print STDERR "\n\n" if ($verbose_load);
+ LOG ($verbose_load, "URL: $alta_vista_random_link");
+
+ $last_search = $alta_vista_random_link; # for warnings
+
+ $suppress_audit = 1;
+
+ my ( $base, $body ) = get_document ($alta_vista_random_link,
+ undef, $timeout);
+ if (!$base || !$body) {
+ $body = undef;
+ return;
+ }
+
+ LOG ($verbose_load, "redirected to: $base");
+
+ my $img = pick_image_from_body ($base, $body);
+ $body = undef;
+
+ if ($img) {
+ return ($base, $img);
+ } else {
+ return ();
+ }
+}
+
+
+############################################################################
+#
+# Pick images by feeding random words into Alta Vista Image Search
+#
+############################################################################
+
+
+my $alta_vista_images_url = "http://www.altavista.com/image/results" .
+ "?ipht=1" . # photos
+ "&igrph=1" . # graphics
+ "&iclr=1" . # color
+ "&ibw=1" . # b&w
+ "&micat=1" . # no partner sites
+ "&sc=on" . # "site collapse"
+ "&q=";
+
+# avimages
+sub pick_from_alta_vista_images($) {
+ my ($timeout) = @_;
+
+ my $words = random_word();
+ my $page = (int(rand(9)) + 1);
+ my $search_url = $alta_vista_images_url . $words;
+
+ if ($page > 1) {
+ $search_url .= "&pgno=" . $page; # page number
+ $search_url .= "&stq=" . (($page-1) * 12); # first hit result on page
+ }
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+
+ # avimages is encoding their URLs now.
+ next unless ($u =~ s/^.*\*\*(http%3a.*$)/$1/gsi);
+ $u = url_unquote($u);
+
+ next unless ($u =~ m@^https?://@i); # skip non-HTTP or relative URLs
+ next if ($u =~ m@[/.]altavista\.com\b@i); # skip altavista builtins
+ next if ($u =~ m@[/.]yahoo\.com\b@i); # yahoo and av in cahoots?
+ next if ($u =~ m@[/.]doubleclick\.net\b@i); # you cretins
+ next if ($u =~ m@[/.]clicktomarket\.com\b@i); # more cretins
+
+ next if ($u =~ m@[/.]viewimages\.com\b@i); # stacked deck
+ next if ($u =~ m@[/.]gettyimages\.com\b@i);
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ return pick_image_from_pages ($search_url, $search_hit_count, $#subpages+1,
+ $timeout, @candidates);
+}
+
+
+
+############################################################################
+#
+# Pick images from Aptix security cameras
+# Cribbed liberally from google image search code.
+# By Jason Sullivan <jasonsul@us.ibm.com>
+#
+############################################################################
+
+my $aptix_images_url = ("http://www.google.com/search" .
+ "?q=inurl:%22jpg/image.jpg%3Fr%3D%22");
+
+# securitycam
+sub pick_from_security_camera($) {
+ my ($timeout) = @_;
+
+ my $page = (int(rand(9)) + 1);
+ my $num = 20; # 20 images per page
+ my $search_url = $aptix_images_url;
+
+ if ($page > 1) {
+ $search_url .= "&start=" . $page*$num; # page number
+ $search_url .= "&num=" . $num; #images per page
+ }
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, '');
+
+ my @candidates = ();
+ my %referers;
+ foreach my $u (@subpages) {
+ next if ($u =~ m@[/.]google\.com\b@i); # skip google builtins (most links)
+ next unless ($u =~ m@jpg/image.jpg\?r=@i); # All pics contain this
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ $referers{$u} = $u;
+ }
+
+ @candidates = depoison (@candidates);
+ return () if ($#candidates < 0);
+ my $i = int(rand($#candidates+1));
+ my $img = $candidates[$i];
+ my $ref = $referers{$img};
+
+ LOG ($verbose_load, "picked image " . ($i+1) . ": $img (on $ref)");
+ return ($ref, $img);
+}
+
+
+############################################################################
+#
+# Pick images by feeding random words into Google Image Search.
+# By Charles Gales <gales@us.ibm.com>
+#
+############################################################################
+
+my $google_images_url = 'https://www.google.com/search' .
+ '?source=lnms&tbm=isch&tbs=isz:l&q=';
+
+# googleimgs
+sub pick_from_google_images($;$$) {
+ my ($timeout, $words, $max_page) = @_;
+
+ if (!defined($words)) {
+ $words = random_word(); # only one word for Google
+ }
+
+ my $off = int(rand(40));
+ my $search_url = $google_images_url . $words . "&start=" . $off;
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+ $u = html_unquote($u);
+ # next if ($u =~ m@^https?://[^.]*\.(google|youtube)\.com/@s);
+ next unless ($u =~ m@^https?://[^/]*\.gstatic\.com@s);
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ @candidates = depoison (@candidates);
+ return () if ($#candidates < 0);
+ my $i = int(rand($#candidates+1));
+ my $img = $candidates[$i];
+
+ LOG ($verbose_load, "picked image " . ($i+1) . ": $img");
+ return ($img, $img);
+}
+
+
+
+############################################################################
+#
+# Pick images by feeding random numbers into Google Image Search.
+# By jwz, suggested by Ian O'Donnell.
+#
+############################################################################
+
+
+# googlenums
+sub pick_from_google_image_numbers($) {
+ my ($timeout) = @_;
+
+ my $max = 9999;
+ my $number = int(rand($max));
+
+ $number = sprintf("%04d", $number)
+ if (rand() < 0.3);
+
+ pick_from_google_images ($timeout, "$number");
+}
+
+
+
+############################################################################
+#
+# Pick images by feeding random digital camera file names into
+# Google Image Search.
+# By jwz, inspired by the excellent Random Personal Picture Finder
+# at http://www.diddly.com/random/
+# May 2017: Commented out a bunch of formats that have fallen out of favor.
+#
+############################################################################
+
+my @photomakers = (
+ #
+ # Common digital camera file name formats, as described at
+ # http://www.diddly.com/random/about.html
+ #
+# sub { sprintf ("dcp%05d.jpg", int(rand(4000))); }, # Kodak
+ sub { sprintf ("dsc%05d.jpg", int(rand(4000))); }, # Nikon
+ sub { sprintf ("dscn%04d.jpg", int(rand(4000))); }, # Nikon
+# sub { sprintf ("mvc-%03d.jpg", int(rand(999))); }, # Sony Mavica
+# sub { sprintf ("mvc%05d.jpg", int(rand(9999))); }, # Sony Mavica
+# sub { sprintf ("P101%04d.jpg", int(rand(9999))); }, # Olympus w/ date=101
+# sub { sprintf ("P%x%02d%04d.jpg", # Olympus
+# int(rand(0xC)), int(rand(30))+1,
+# rand(9999)); },
+ sub { sprintf ("IMG_%03d.jpg", int(rand(999))); }, # ?
+# sub { sprintf ("IMAG%04d.jpg", int(rand(9999))); }, # RCA and Samsung
+# sub { my $n = int(rand(9999)); # Canon
+# sprintf ("1%02d-%04d.jpg", int($n/100), $n); },
+# sub { my $n = int(rand(9999)); # Canon
+# sprintf ("1%02d-%04d_IMG.jpg",
+# int($n/100), $n); },
+ sub { sprintf ("IMG_%04d.jpg", int(rand(9999))); }, # Canon
+ sub { sprintf ("dscf%04d.jpg", int(rand(9999))); }, # Fuji Finepix
+# sub { sprintf ("pdrm%04d.jpg", int(rand(9999))); }, # Toshiba PDR
+# sub { sprintf ("IM%06d.jpg", int(rand(9999))); }, # HP Photosmart
+# sub { sprintf ("EX%06d.jpg", int(rand(9999))); }, # HP Photosmart
+# sub { my $n = int(rand(3)); # Kodak DC-40,50,120
+# sprintf ("DC%04d%s.jpg", int(rand(9999)),
+# $n == 0 ? 'S' : $n == 1 ? 'M' : 'L'); },
+ sub { sprintf ("pict%04d.jpg", int(rand(9999))); }, # Minolta Dimage
+# sub { sprintf ("P%07d.jpg", int(rand(9999))); }, # Kodak DC290
+# sub { sprintf ("%02d%02d%04d.jpg", # Casio QV3000, QV4000
+# int(rand(12))+1, int(rand(31))+1,
+# int(rand(999))); },
+# sub { sprintf ("%02d%x%02d%04d.jpg", # Casio QV7000
+# int(rand(6)), # year
+# int(rand(12))+1, int(rand(31))+1,
+# int(rand(999))); },
+ sub { sprintf ("IMGP%04d.jpg", int(rand(9999))); }, # Pentax Optio S
+# sub { sprintf ("PANA%04d.jpg", int(rand(9999))); }, # Panasonic vid still
+ sub { sprintf ("HPIM%04d.jpg", int(rand(9999))); }, # HP Photosmart
+# sub { sprintf ("PCDV%04d.jpg", int(rand(9999))); }, # ?
+ );
+
+
+# googlephotos
+sub pick_from_google_image_photos($) {
+ my ($timeout) = @_;
+
+ my $i = int(rand($#photomakers + 1));
+ my $fn = $photomakers[$i];
+ my $file = &$fn;
+ #$file .= "%20filetype:jpg";
+
+ pick_from_google_images ($timeout, $file);
+}
+
+
+############################################################################
+#
+# Pick images by feeding random words into Google Image Search.
+# By the way: fuck Microsoft.
+#
+############################################################################
+
+my $bing_images_url = "http://www.bing.com/images/async?q=";
+
+
+# bingimgs
+sub pick_from_bing_images($;$$) {
+ my ($timeout, $words, $max_page) = @_;
+
+ if (!defined($words)) {
+ $words = random_word(); # only one word for Bing
+ }
+
+ my $off = int(rand(300));
+ my $search_url = $bing_images_url . $words . "&first=" . $off;
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ my %referers;
+ foreach my $u (@subpages) {
+ my ($img, $ref) = ($u =~ m/^(.*?)\t(.*)$/s);
+ next unless $img;
+ LOG ($verbose_filter, " candidate: $ref");
+ push @candidates, $img;
+ $referers{$img} = $ref;
+ }
+
+ @candidates = depoison (@candidates);
+ return () if ($#candidates < 0);
+ my $i = int(rand($#candidates+1));
+ my $img = $candidates[$i];
+ my $ref = $referers{$img};
+
+ LOG ($verbose_load, "picked image " . ($i+1) . ": $img (on $ref)");
+ return ($ref, $img);
+}
+
+
+
+
+############################################################################
+#
+# Pick images by feeding random numbers into Bing Image Search.
+#
+############################################################################
+
+# bingnums
+sub pick_from_bing_image_numbers($) {
+ my ($timeout) = @_;
+
+ my $max = 9999;
+ my $number = int(rand($max));
+
+ $number = sprintf("%04d", $number)
+ if (rand() < 0.3);
+
+ pick_from_bing_images ($timeout, "$number");
+}
+
+
+############################################################################
+#
+# Pick images by feeding random numbers into Bing Image Search.
+#
+############################################################################
+
+# bingphotos
+sub pick_from_bing_image_photos($) {
+ my ($timeout) = @_;
+
+ my $i = int(rand($#photomakers + 1));
+ my $fn = $photomakers[$i];
+ my $file = &$fn;
+
+ pick_from_bing_images ($timeout, $file);
+}
+
+
+############################################################################
+#
+# Pick images by feeding random words into Alta Vista Text Search
+#
+############################################################################
+
+
+my $alta_vista_url = "http://www.altavista.com/web/results" .
+ "?pg=aq" .
+ "&aqmode=s" .
+ "&filetype=html" .
+ "&sc=on" . # "site collapse"
+ "&nbq=50" .
+ "&aqo=";
+
+# avtext
+sub pick_from_alta_vista_text($) {
+ my ($timeout) = @_;
+
+ my $words = random_words('%20');
+ my $page = (int(rand(9)) + 1);
+ my $search_url = $alta_vista_url . $words;
+
+ if ($page > 1) {
+ $search_url .= "&pgno=" . $page;
+ $search_url .= "&stq=" . (($page-1) * 10);
+ }
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+
+ # Those altavista fuckers are playing really nasty redirection games
+ # these days: the filter your clicks through their site, but use
+ # onMouseOver to make it look like they're not! Well, it makes it
+ # easier for us to identify search results...
+ #
+ next unless ($u =~ s/^.*\*\*(http%3a.*$)/$1/gsi);
+ $u = url_unquote($u);
+
+ next unless ($u =~ m@^https?://@i); # skip non-HTTP or relative URLs
+ next if ($u =~ m@[/.]altavista\.com\b@i); # skip altavista builtins
+ next if ($u =~ m@[/.]yahoo\.com\b@i); # yahoo and av in cahoots?
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ return pick_image_from_pages ($search_url, $search_hit_count, $#subpages+1,
+ $timeout, @candidates);
+}
+
+
+
+############################################################################
+#
+# Pick images by feeding random words into Hotbot
+#
+############################################################################
+
+my $hotbot_search_url =("http://hotbot.lycos.com/default.asp" .
+ "?ca=w" .
+ "&descriptiontype=0" .
+ "&imagetoggle=1" .
+ "&matchmode=any" .
+ "&nummod=2" .
+ "&recordcount=50" .
+ "&sitegroup=1" .
+ "&stem=1" .
+ "&cobrand=undefined" .
+ "&query=");
+
+sub pick_from_hotbot_text($) {
+ my ($timeout) = @_;
+
+ $last_search = $hotbot_search_url; # for warnings
+
+ # lycos seems to always give us back dictionaries and word lists if
+ # we search for more than one word...
+ #
+ my $words = random_word();
+
+ my $start = int(rand(8)) * 10 + 1;
+ my $search_url = $hotbot_search_url . $words . "&first=$start&page=more";
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+
+ # Hotbot plays redirection games too
+ # (not any more?)
+# next unless ($u =~ m@/director.asp\?.*\btarget=([^&]+)@);
+# $u = url_decode($1);
+
+ next unless ($u =~ m@^https?://@i); # skip non-HTTP or relative URLs
+ next if ($u =~ m@[/.]hotbot\.com\b@i); # skip hotbot builtins
+ next if ($u =~ m@[/.]lycos\.com\b@i); # skip hotbot builtins
+ next if ($u =~ m@[/.]inktomi\.com\b@i); # skip hotbot builtins
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ return pick_image_from_pages ($search_url, $search_hit_count, $#subpages+1,
+ $timeout, @candidates);
+}
+
+
+
+############################################################################
+#
+# Pick images by feeding random words into Lycos
+#
+############################################################################
+
+my $lycos_search_url = "http://search.lycos.com/default.asp" .
+ "?lpv=1" .
+ "&loc=searchhp" .
+ "&tab=web" .
+ "&query=";
+
+sub pick_from_lycos_text($) {
+ my ($timeout) = @_;
+
+ $last_search = $lycos_search_url; # for warnings
+
+ # lycos seems to always give us back dictionaries and word lists if
+ # we search for more than one word...
+ #
+ my $words = random_word();
+
+ my $start = int(rand(8)) * 10 + 1;
+ my $search_url = $lycos_search_url . $words . "&first=$start&page=more";
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+
+ # Lycos plays redirection games.
+ # (not any more?)
+# next unless ($u =~ m@^https?://click.lycos.com/director.asp
+# .*
+# \btarget=([^&]+)
+# .*
+# @x);
+# $u = url_decode($1);
+
+ next unless ($u =~ m@^https?://@i); # skip non-HTTP or relative URLs
+ next if ($u =~ m@[/.]hotbot\.com\b@i); # skip lycos builtins
+ next if ($u =~ m@[/.]lycos\.com\b@i); # skip lycos builtins
+ next if ($u =~ m@[/.]terralycos\.com\b@i); # skip lycos builtins
+ next if ($u =~ m@[/.]inktomi\.com\b@i); # skip lycos builtins
+
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ return pick_image_from_pages ($search_url, $search_hit_count, $#subpages+1,
+ $timeout, @candidates);
+}
+
+
+
+############################################################################
+#
+# Pick images by feeding random words into news.yahoo.com
+#
+############################################################################
+
+my $yahoo_news_url = "http://news.search.yahoo.com/search/news" .
+ "?c=news_photos" .
+ "&p=";
+
+# yahoonews
+sub pick_from_yahoo_news_text($) {
+ my ($timeout) = @_;
+
+ $last_search = $yahoo_news_url; # for warnings
+
+ my $words = random_word();
+ my $search_url = $yahoo_news_url . $words;
+
+ my ($search_hit_count, @subpages) =
+ pick_from_search_engine ($timeout, $search_url, $words);
+
+ my @candidates = ();
+ foreach my $u (@subpages) {
+
+ # de-redirectize the URLs
+ $u =~ s@^https?://rds\.yahoo\.com/.*-http%3A@http:@s;
+
+ # only accept URLs on Yahoo's news site
+ next unless ($u =~ m@^https?://dailynews\.yahoo\.com/@i ||
+ $u =~ m@^https?://story\.news\.yahoo\.com/@i);
+ next unless ($u =~ m@&u=/@);
+
+ LOG ($verbose_filter, " candidate: $u");
+ push @candidates, $u;
+ }
+
+ return pick_image_from_pages ($search_url, $search_hit_count, $#subpages+1,
+ $timeout, @candidates);
+}
+
+
+
+############################################################################
+#
+# Pick images from LiveJournal's list of recently-posted images.
+#
+############################################################################
+
+my $livejournal_img_url = "http://www.livejournal.com/stats/latest-img.bml";
+
+# With most of our image sources, we get a random page and then select
+# from the images on it. However, in the case of LiveJournal, the page
+# of images tends to update slowly; so we'll remember the last N entries
+# on it and randomly select from those, to get a wider variety each time.
+
+my $lj_cache_size = 1000;
+my @lj_cache = (); # fifo, for ordering by age
+my %lj_cache = (); # hash, for detecting dups
+
+# livejournal
+sub pick_from_livejournal_images($) {
+ my ($timeout) = @_;
+
+ $last_search = $livejournal_img_url; # for warnings
+
+ my ( $base, $body ) = get_document ($livejournal_img_url, undef, $timeout);
+
+ # Often the document comes back empty. If so, just use the cache.
+ # return () unless $body;
+ $body = '' unless defined($body);
+
+ $body =~ s/\n/ /gs;
+ $body =~ s/(<recent-image)\b/\n$1/gsi;
+
+ foreach (split (/\n/, $body)) {
+ next unless (m/^<recent-image\b/);
+ next unless (m/\bIMG=[\'\"]([^\'\"]+)[\'\"]/si);
+ my $img = html_unquote ($1);
+
+ next if ($lj_cache{$img}); # already have it
+
+ next unless (m/\bURL=[\'\"]([^\'\"]+)[\'\"]/si);
+ my $page = html_unquote ($1);
+ my @pair = ($img, $page);
+ LOG ($verbose_filter, " candidate: $img");
+ push @lj_cache, \@pair;
+ $lj_cache{$img} = \@pair;
+ }
+
+ return () if ($#lj_cache == -1);
+
+ my $n = $#lj_cache+1;
+ my $i = int(rand($n));
+ my ($img, $page) = @{$lj_cache[$i]};
+
+ # delete this one from @lj_cache and from %lj_cache.
+ #
+ @lj_cache = ( @lj_cache[0 .. $i-1],
+ @lj_cache[$i+1 .. $#lj_cache] );
+ delete $lj_cache{$img};
+
+ # Keep the size of the cache under the limit by nuking older entries
+ #
+ while ($#lj_cache >= $lj_cache_size) {
+ my $pairP = shift @lj_cache;
+ my $img = $pairP->[0];
+ delete $lj_cache{$img};
+ }
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/$n: $img");
+
+ return ($page, $img);
+}
+
+
+############################################################################
+#
+# Pick images from ircimages.com (images that have been in the /topic of
+# various IRC channels.)
+#
+############################################################################
+
+my $ircimages_url = "http://ircimages.com/";
+
+# ircimages
+sub pick_from_ircimages($) {
+ my ($timeout) = @_;
+
+ $last_search = $ircimages_url; # for warnings
+
+ my $n = int(rand(2900));
+ my $search_url = $ircimages_url . "page-$n";
+
+ my ( $base, $body ) = get_document ($search_url, undef, $timeout);
+ return () unless $body;
+
+ my @candidates = ();
+
+ $body =~ s/\n/ /gs;
+ $body =~ s/(<A)\b/\n$1/gsi;
+
+ foreach (split (/\n/, $body)) {
+
+ my ($u) = m@<A\s.*\bHREF\s*=\s*([^>]+)>@i;
+ next unless $u;
+
+ if ($u =~ m/^\"([^\"]*)\"/) { $u = $1; } # quoted string
+ elsif ($u =~ m/^([^\s]*)\s/) { $u = $1; } # or token
+
+ next unless ($u =~ m/^https?:/i);
+ next if ($u =~ m@^https?://(searchirc\.com\|ircimages\.com)@i);
+ next unless ($u =~ m@[.](gif|jpg|jpeg|pjpg|pjpeg|png)$@i);
+
+ LOG ($verbose_http, " HREF: $u");
+ push @candidates, $u;
+ }
+
+ LOG ($verbose_filter, "" . $#candidates+1 . " links on $search_url");
+
+ return () if ($#candidates == -1);
+
+ my $i = int(rand($#candidates+1));
+ my $img = $candidates[$i];
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/" . ($#candidates+1) .
+ ": $img");
+
+ $search_url = $img; # hmm...
+ return ($search_url, $img);
+}
+
+
+############################################################################
+#
+# Pick images from Twitpic's list of recently-posted images.
+#
+############################################################################
+
+my $twitpic_img_url = "http://twitpic.com/public_timeline/feed.rss";
+
+# With most of our image sources, we get a random page and then select
+# from the images on it. However, in the case of Twitpic, the page
+# of images tends to update slowly; so we'll remember the last N entries
+# on it and randomly select from those, to get a wider variety each time.
+
+my $twitpic_cache_size = 1000;
+my @twitpic_cache = (); # fifo, for ordering by age
+my %twitpic_cache = (); # hash, for detecting dups
+
+# twitpic
+sub pick_from_twitpic_images($) {
+ my ($timeout) = @_;
+
+ $last_search = $twitpic_img_url; # for warnings
+
+ my ( $base, $body ) = get_document ($twitpic_img_url, undef, $timeout);
+
+ # Update the cache.
+
+ if ($body) {
+ $body =~ s/\n/ /gs;
+ $body =~ s/(<item)\b/\n$1/gsi;
+
+ my @items = split (/\n/, $body);
+ shift @items;
+ foreach (@items) {
+ next unless (m@<link>([^<>]*)</link>@si);
+ my $page = html_unquote ($1);
+
+ $page =~ s@/$@@s;
+ $page .= '/full';
+
+ next if ($twitpic_cache{$page}); # already have it
+
+ LOG ($verbose_filter, " candidate: $page");
+ push @twitpic_cache, $page;
+ $twitpic_cache{$page} = $page;
+ }
+ }
+
+ # Pull from the cache.
+
+ return () if ($#twitpic_cache == -1);
+
+ my $n = $#twitpic_cache+1;
+ my $i = int(rand($n));
+ my $page = $twitpic_cache[$i];
+
+ # delete this one from @twitpic_cache and from %twitpic_cache.
+ #
+ @twitpic_cache = ( @twitpic_cache[0 .. $i-1],
+ @twitpic_cache[$i+1 .. $#twitpic_cache] );
+ delete $twitpic_cache{$page};
+
+ # Keep the size of the cache under the limit by nuking older entries
+ #
+ while ($#twitpic_cache >= $twitpic_cache_size) {
+ my $page = shift @twitpic_cache;
+ delete $twitpic_cache{$page};
+ }
+
+ ( $base, $body ) = get_document ($page, undef, $timeout);
+ my $img = undef;
+ $body = '' unless defined($body);
+
+ foreach (split (/<img\s+/, $body)) {
+ my ($src) = m/\bsrc=[\"\'](.*?)[\"\']/si;
+ next unless $src;
+ next if m@/js/@s;
+ next if m@/images/@s;
+
+ $img = $src;
+
+ $img = "http:$img" if ($img =~ m@^//@s); # Oh come on
+
+ # Sometimes these images are hosted on twitpic, sometimes on Amazon.
+ if ($img =~ m@^/@) {
+ $base =~ s@^(https?://[^/]+)/.*@$1@s;
+ $img = $base . $img;
+ }
+ last;
+ }
+
+ if (!$img) {
+ LOG ($verbose_load, "no matching images on $page\n");
+ return ();
+ }
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/$n: $img");
+
+ return ($page, $img);
+}
+
+
+############################################################################
+#
+# Pick images from Twitter's list of recently-posted updates.
+#
+############################################################################
+
+# With most of our image sources, we get a random page and then select
+# from the images on it. However, in the case of Twitter, the page
+# of images only updates once a minute; so we'll remember the last N entries
+# on it and randomly select from those, to get a wider variety each time.
+
+my $twitter_img_url = "http://api.twitter.com/1/statuses/" .
+ "public_timeline.json" .
+ "?include_entities=true" .
+ "&include_rts=true" .
+ "&count=200";
+
+my $twitter_cache_size = 1000;
+
+my @twitter_cache = (); # fifo, for ordering by age
+my %twitter_cache = (); # hash, for detecting dups
+
+
+# twitter
+sub pick_from_twitter_images($) {
+ my ($timeout) = @_;
+
+ $last_search = $twitter_img_url; # for warnings
+
+ my ( $base, $body ) = get_document ($twitter_img_url, undef, $timeout);
+ # Update the cache.
+
+ if ($body) {
+ $body =~ s/[\r\n]+/ /gs;
+
+ # Parsing JSON is a pain in the ass. So we halfass it as usual.
+ $body =~ s/^\[|\]$//s;
+ $body =~ s/(\[.*?\])/{ $_ = $1; s@\},@\} @gs; $_; }/gsexi;
+ my @items = split (/\},\{/, $body);
+ foreach (@items) {
+ my ($name) = m@"screen_name":"([^\"]+)"@si;
+ my ($img) = m@"media_url":"([^\"]+)"@si;
+ my ($page) = m@"display_url":"([^\"]+)"@si;
+ next unless ($name && $img && $page);
+ foreach ($img, $page) {
+ s/\\//gs;
+ $_ = "http://$_" unless (m/^http/si);
+ }
+
+ next if ($twitter_cache{$page}); # already have it
+
+ LOG ($verbose_filter, " candidate: $page - $img");
+ push @twitter_cache, $page;
+ $twitter_cache{$page} = $img;
+ }
+ }
+
+ # Pull from the cache.
+
+ return () if ($#twitter_cache == -1);
+
+ my $n = $#twitter_cache+1;
+ my $i = int(rand($n));
+ my $page = $twitter_cache[$i];
+ my $url = $twitter_cache{$page};
+
+ # delete this one from @twitter_cache and from %twitter_cache.
+ #
+ @twitter_cache = ( @twitter_cache[0 .. $i-1],
+ @twitter_cache[$i+1 .. $#twitter_cache] );
+ delete $twitter_cache{$page};
+
+ # Keep the size of the cache under the limit by nuking older entries
+ #
+ while ($#twitter_cache >= $twitter_cache_size) {
+ my $page = shift @twitter_cache;
+ delete $twitter_cache{$page};
+ }
+
+ LOG ($verbose_load, "picked page $url");
+
+ $suppress_audit = 1;
+
+ return ($page, $url);
+}
+
+
+############################################################################
+#
+# Pick images from Flickr's page of recently-posted photos.
+#
+############################################################################
+
+my $flickr_img_url = "http://www.flickr.com/explore/";
+
+# Like LiveJournal, the Flickr page of images tends to update slowly,
+# so remember the last N entries on it and randomly select from those.
+
+# I know that Flickr has an API (http://www.flickr.com/services/api/)
+# but it was easy enough to scrape the HTML, so I didn't bother exploring.
+
+my $flickr_cache_size = 1000;
+my @flickr_cache = (); # fifo, for ordering by age
+my %flickr_cache = (); # hash, for detecting dups
+
+
+# flickr_recent
+sub pick_from_flickr_recent($) {
+ my ($timeout) = @_;
+
+ my $start = 16 * int(rand(100));
+
+ $last_search = $flickr_img_url; # for warnings
+ $last_search .= "?start=$start" if ($start > 0);
+
+ my ( $base, $body ) = get_document ($last_search, undef, $timeout);
+
+ # If the document comes back empty. just use the cache.
+ # return () unless $body;
+ $body = '' unless defined($body);
+
+ my $count = 0;
+ my $count2 = 0;
+
+ if ($body =~ m@{ *"_data": \[ ( .*? \} ) \]@six) {
+ $body = $1;
+ } else {
+ LOG ($verbose_load, "flickr unparsable: $last_search");
+ return ();
+ }
+
+ $body =~ s/[\r\n]/ /gs;
+ $body =~ s/(\},) *(\{)/$1\n$2/gs; # "_flickrModelRegistry"
+
+ foreach my $chunk (split (/\n/, $body)) {
+ my ($img) = ($chunk =~ m@"displayUrl": *"(.*?)"@six);
+ next unless defined ($img);
+ $img =~ s/\\//gs;
+ $img = "//" unless ($img =~ m@^/@s);
+ $img = "http:$img" unless ($img =~ m/^http/s);
+
+ my ($user) = ($chunk =~ m/"pathAlias": *"(.*?)"/si);
+ next unless defined ($user);
+
+ my ($id) = ($img =~ m@/\d+/(\d+)_([\da-f]+)_@si);
+ my ($page) = "https://www.flickr.com/photos/$user/$id/";
+
+ # $img =~ s/_[a-z](\.[a-z\d]+)$/$1/si; # take off "thumb" suffix
+
+ $count++;
+ next if ($flickr_cache{$img}); # already have it
+
+ my @pair = ($img, $page, $start);
+ LOG ($verbose_filter, " candidate: $img");
+ push @flickr_cache, \@pair;
+ $flickr_cache{$img} = \@pair;
+ $count2++;
+ }
+
+ return () if ($#flickr_cache == -1);
+
+ my $n = $#flickr_cache+1;
+ my $i = int(rand($n));
+ my ($img, $page) = @{$flickr_cache[$i]};
+
+ # delete this one from @flickr_cache and from %flickr_cache.
+ #
+ @flickr_cache = ( @flickr_cache[0 .. $i-1],
+ @flickr_cache[$i+1 .. $#flickr_cache] );
+ delete $flickr_cache{$img};
+
+ # Keep the size of the cache under the limit by nuking older entries
+ #
+ while ($#flickr_cache >= $flickr_cache_size) {
+ my $pairP = shift @flickr_cache;
+ my $img = $pairP->[0];
+ delete $flickr_cache{$img};
+ }
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/$n: $img");
+
+ return ($page, $img);
+}
+
+
+############################################################################
+#
+# Pick images from a random RSS feed on Flickr.
+#
+############################################################################
+
+my $flickr_rss_base = ("http://www.flickr.com/services/feeds/" .
+ "photos_public.gne" .
+ "?format=rss_200_enc&tagmode=any&tags=");
+
+# Picks a random RSS feed; picks a random image from that feed;
+# returns 2 URLs: the page containing the image, and the image.
+# Mostly by Joe Mcmahon <mcmahon@yahoo-inc.com>
+#
+# flickr_random
+sub pick_from_flickr_random($) {
+ my $timeout = shift;
+
+ my $words = random_words(',');
+ my $rss = $flickr_rss_base . $words;
+ $last_search = $rss;
+
+ $_ = $words;
+ s/,/ /g;
+
+ print STDERR "\n\n" if ($verbose_load);
+ LOG ($verbose_load, "words: $_");
+ LOG ($verbose_load, "URL: $last_search");
+
+ $suppress_audit = 1;
+
+ my ( $base, $body ) = get_document ($last_search, undef, $timeout);
+ if (!$base || !$body) {
+ $body = undef;
+ return;
+ }
+
+ my $img;
+ ($base, $img) = pick_image_from_rss ($base, $body);
+ $body = undef;
+ return () unless defined ($img);
+
+ LOG ($verbose_load, "redirected to: $base");
+ return ($base, $img);
+}
+
+
+############################################################################
+#
+# Pick random images from Instagram.
+#
+############################################################################
+
+my $instagram_url_base = "https://api.instagram.com/v1/media/popular";
+
+# instagram_random
+sub pick_from_instagram($) {
+ my $timeout = shift;
+
+ # Liberated access tokens.
+ # jsdo.it search for: instagram client_id
+ # Google search for: instagram "&client_id=" site:jsfiddle.net
+ my @tokens = (#'b59fbe4563944b6c88cced13495c0f49', # gramfeed.com
+ #'fa26679250df49c48a33fbcf30aae989', # instac.at
+ #'d9494686198d4dfeb954979a3e270e5e', # iconosquare.com
+ #'793ef48bb18e4197b61afce2d799b81c', # jsdo.it
+ #'67b8a3e0073449bba70600d0fc68e6cb', # jsdo.it
+ #'26a098e0df4d4b9ea8b4ce6c505b7742', # jsdo.it
+ #'2437cbcd906a4c10940f990d283d3cd5', # jsdo.it
+ #'191c7d7d5312464cbd92134f36ffdab5', # jsdo.it
+ #'acfec809437b4340b2c38f66503af774', # jsdo.it
+ #'e9f77604a3a24beba949c12d18130988', # jsdo.it
+ #'2cd7bcf68ae346529770073d311575b3', # jsdo.it
+ #'830c600fe8d742e2ab3f3b94f9bb22b7', # jsdo.it
+ #'55865a0397ad41e5997dd95ef4df8da1', # jsdo.it
+ #'192a5742f3644ea8bed1d25e439286a8', # jsdo.it
+ #'38ed1477e7a44595861b8842cdb8ba23', # jsdo.it
+ #'e52f79f645f54488ad0cc47f6f55ade6', # jsfiddle.net
+ );
+
+ my $tok = $tokens[int(rand($#tokens+1))];
+ $last_search = $instagram_url_base . "?client_id=" . $tok;
+
+ print STDERR "\n\n" if ($verbose_load);
+ LOG ($verbose_load, "URL: $last_search");
+
+ my ( $base, $body ) = get_document ($last_search, undef, $timeout);
+ if (!$base || !$body) {
+ $body = undef;
+ return;
+ }
+
+ $body =~ s/("link")/\001$1/gs;
+ my @chunks = split(/\001/, $body);
+ shift @chunks;
+ my @urls = ();
+ foreach (@chunks) {
+ s/\\//gs;
+ my ($url) = m/"link":\s*"(.*?)"/s;
+ my ($img) = m/"standard_resolution":\{"url":\s*"(.*?)"/s;
+ ($img) = m/"url":\s*"(.*?)"/s unless $url;
+ next unless ($url && $img);
+ push @urls, [ $url, $img ];
+ }
+
+ if ($#urls < 0) {
+ LOG ($verbose_load, "no images on $last_search");
+ return ();
+ }
+
+ my $i = int(rand($#urls+1));
+ my ($url, $img) = @{$urls[$i]};
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/" . ($#urls+1) . ": $url");
+ return ($url, $img);
+}
+
+
+############################################################################
+#
+# Pick images from Imgur.
+#
+############################################################################
+
+my $imgur_base = 'http://imgur.com/search?qs=thumb&q_any=';
+
+sub pick_from_imgur($) {
+ my $timeout = shift;
+
+ my $words = random_words('%20');
+ $last_search = $imgur_base . $words;
+
+ $_ = $words;
+ s/%20/ /g;
+
+ print STDERR "\n\n" if ($verbose_load);
+ LOG ($verbose_load, "words: $_");
+ LOG ($verbose_load, "URL: $last_search");
+
+ $suppress_audit = 1;
+
+ my ( $base, $body ) = get_document ($last_search, undef, $timeout);
+ if (!$base || !$body) {
+ $body = undef;
+ return;
+ }
+
+ my @imgs = ($body =~ m@\bHREF=[\"\']([^\'\"<>]*/gallery/[^\'\"<>]+)@gsi);
+ return () unless @imgs;
+
+ my $n = @imgs;
+ my $i = int(rand($n));
+ my $page = $imgs[$i];
+ $page =~ s/[?&].*$//s;
+ $page = "http://imgur.com$page" if ($page =~ m@^/@s);
+
+ my ($id) = ($page =~ m@([^/?&]+)$@s);
+ my $img = "http://i.imgur.com/$id.jpg";
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/$n: $img");
+
+ return ($page, $img);
+}
+
+
+############################################################################
+#
+# Pick images from Tumblr.
+#
+############################################################################
+
+my $tumblr_base = 'https://www.tumblr.com/search/';
+
+sub pick_from_tumblr($) {
+ my $timeout = shift;
+
+ # Tumblr doesn't have an "or" search, which means our vocabulary is
+ # a bit too extensive to work well...
+
+ my $words = random_word();
+ $last_search = $tumblr_base . $words;
+
+ print STDERR "\n\n" if ($verbose_load);
+ LOG ($verbose_load, "words: $words");
+ LOG ($verbose_load, "URL: $last_search");
+
+ $suppress_audit = 1;
+
+ my ( $base, $body ) = get_document ($last_search, undef, $timeout);
+ if (!$base || !$body) {
+ $body = undef;
+ return;
+ }
+
+ my @imgs0 = ($body =~ m@<IMG\b([^<>]*)>@gsi);
+ return () unless @imgs0;
+ my @imgs;
+ foreach my $img (@imgs0) {
+ my ($src) = ($img =~ m@\bsrc=[\"\'](.*?)[\"\']@si);
+ my ($href) = ($img =~ m@\bdata-pin-url=[\"\'](.*?)[\"\']@si);
+ next unless ($src && $href);
+ next if ($src =~ m/^data:/s);
+ foreach ($src, $href) { $_ = "http://www.tumblr.com$_" if (m@^/@s); }
+ push @imgs, [$href, $src];
+ }
+ return () unless @imgs;
+
+ my $n = @imgs;
+ my $i = int(rand($n));
+ my $page = $imgs[$i]->[0];
+ my $img = $imgs[$i]->[1];
+
+ LOG ($verbose_load, "picked image " .($i+1) . "/$n: $img");
+
+ return ($page, $img);
+}
+
+
+############################################################################
+#
+# Pick images by waiting for driftnet to populate a temp dir with files.
+# Requires driftnet version 0.1.5 or later.
+# (Driftnet is a program by Chris Lightfoot that sniffs your local ethernet
+# for images being downloaded by others.)
+# Driftnet/webcollage integration by jwz.
+#
+############################################################################
+
+# driftnet
+sub pick_from_driftnet($) {
+ my ($timeout) = @_;
+
+ my $id = $driftnet_magic;
+ my $dir = $driftnet_dir;
+ my $start = time;
+ my $now;
+
+ error ("\$driftnet_dir unset?") unless ($dir);
+ $dir =~ s@/+$@@;
+
+ error ("$dir unreadable") unless (-d "$dir/.");
+
+ $timeout = $http_timeout unless ($timeout);
+ $last_search = $id;
+
+ while ($now = time, $now < $start + $timeout) {
+ opendir (my $dir, $dir) || error ("$dir: $!");
+ while (my $file = readdir($dir)) {
+ next if ($file =~ m/^\./);
+ $file = "$dir/$file";
+ closedir ($dir);
+ LOG ($verbose_load, "picked file $file ($id)");
+ return ($id, $file);
+ }
+ closedir ($dir);
+ }
+ LOG (($verbose_net || $verbose_load), "timed out for $id");
+ return ();
+}
+
+
+sub get_driftnet_file($) {
+ my ($file) = @_;
+
+ error ("\$driftnet_dir unset?") unless ($driftnet_dir);
+
+ my $id = $driftnet_magic;
+ error ("$id: $file not in $driftnet_dir?")
+ unless ($file =~ m@^\Q$driftnet_dir@o);
+
+ open (my $in, '<', $file) || error ("$id: $file: $!");
+ my $body = '';
+ local $/ = undef; # read entire file
+ $body = <$in>;
+ close ($in) || error ("$id: $file: $!");
+ unlink ($file) || error ("$id: $file: rm: $!");
+ return ($id, $body);
+}
+
+
+sub spawn_driftnet($) {
+ my ($cmd) = @_;
+
+ # make a directory to use.
+ while (1) {
+ my $tmp = $ENV{TEMPDIR} || "/tmp";
+ $driftnet_dir = sprintf ("$tmp/driftcollage-%08x", rand(0xffffffff));
+ LOG ($verbose_exec, "mkdir $driftnet_dir");
+ last if mkdir ($driftnet_dir, 0700);
+ }
+
+ if (! ($cmd =~ m/\s/)) {
+ # if the command didn't have any arguments in it, then it must be just
+ # a pointer to the executable. Append the default args to it.
+ my $dargs = $default_driftnet_cmd;
+ $dargs =~ s/^[^\s]+//;
+ $cmd .= $dargs;
+ }
+
+ # point the driftnet command at our newly-minted private directory.
+ #
+ $cmd .= " -d $driftnet_dir";
+ $cmd .= ">/dev/null" unless ($verbose_exec);
+
+ my $pid = fork();
+ if ($pid < 0) { error ("fork: $!\n"); }
+ if ($pid) {
+ # parent fork
+ push @pids_to_kill, $pid;
+ LOG ($verbose_exec, "forked for \"$cmd\"");
+ } else {
+ # child fork
+ nontrapping_system ($cmd) || error ("exec: $!");
+ }
+
+ # wait a bit, then make sure the process actually started up.
+ #
+ sleep (1);
+ error ("pid $pid failed to start \"$cmd\"")
+ unless (1 == kill (0, $pid));
+}
+
+# local-directory
+sub pick_from_local_dir($) {
+ my ($timeout) = @_;
+
+ my $id = $local_magic;
+ $last_search = $id;
+
+ my $dir = $local_dir;
+ error ("\$local_dir unset?") unless ($dir);
+ $dir =~ s@/+$@@;
+
+ error ("$dir unreadable") unless (-d "$dir/.");
+
+ my $v = ($verbose_exec ? "-v" : "");
+ my $pick = `xscreensaver-getimage-file $v "$dir"`;
+ $pick =~ s/\s+$//s;
+ $pick = "$dir/$pick" unless ($pick =~ m@^/@s); # relative path
+
+ LOG ($verbose_load, "picked file $pick ($id)");
+ return ($id, $pick);
+}
+
+
+sub get_local_file($) {
+ my ($file) = @_;
+
+ error ("\$local_dir unset?") unless ($local_dir);
+
+ my $id = $local_magic;
+ error ("$id: $file not in $local_dir?")
+ unless ($file =~ m@^\Q$local_dir@o);
+
+ open (my $in, '<:raw', $file) || error ("$id: $file: $!");
+ local $/ = undef; # read entire file
+ my $body = <$in>;
+ close ($in) || error ("$id: $file: $!");
+ return ($id, $body);
+}
+
+
+
+############################################################################
+#
+# Pick a random image in a random way
+#
+############################################################################
+
+
+# Picks a random image on a random page, and returns two URLs:
+# the page containing the image, and the image.
+# Returns () if nothing found this time.
+#
+
+sub pick_image(;$) {
+ my ($timeout) = @_;
+
+ $current_state = "select";
+ $load_method = "none";
+
+ my $n = int(rand(100));
+ my $fn = undef;
+ my $total = 0;
+ my @rest = @search_methods;
+
+ while (@rest) {
+ my $pct = shift @rest;
+ my $name = shift @rest;
+ my $tfn = shift @rest;
+ $total += $pct;
+ if ($total > $n && !defined($fn)) {
+ $fn = $tfn;
+ $current_state = $name;
+ $load_method = $current_state;
+ }
+ }
+
+ if ($total != 100) {
+ error ("internal error: \@search_methods totals to $total%!");
+ }
+
+ record_attempt ($current_state);
+ return $fn->($timeout);
+}
+
+
+
+############################################################################
+#
+# Statistics and logging
+#
+############################################################################
+
+sub timestr() {
+ return strftime ("%H:%M:%S: ", localtime);
+}
+
+sub blurb() {
+ return "$progname: " . timestr() . "$current_state: ";
+}
+
+sub error($) {
+ my ($err) = @_;
+ print STDERR blurb() . "$err\n";
+ exit 1;
+}
+
+sub stacktrace() {
+ my $i = 1;
+ print STDERR "$progname: stack trace:\n";
+ while (1) {
+ my ($package, $filename, $line, $subroutine) = caller($i++);
+ last unless defined($package);
+ $filename =~ s@^.*/@@;
+ print STDERR " $filename#$line, $subroutine\n";
+ }
+}
+
+
+my $lastlog = "";
+
+sub clearlog() {
+ $lastlog = "";
+}
+
+sub showlog() {
+ my $head = "$progname: DEBUG: ";
+ foreach (split (/\n/, $lastlog)) {
+ print STDERR "$head$_\n";
+ }
+ $lastlog = "";
+}
+
+sub LOG($$) {
+ my ($print, $msg) = @_;
+ my $blurb = timestr() . "$current_state: ";
+ $lastlog .= "$blurb$msg\n";
+ print STDERR "$progname: $blurb$msg\n" if $print;
+}
+
+
+my %stats_attempts;
+my %stats_successes;
+my %stats_elapsed;
+
+my $last_state = undef;
+sub record_attempt($) {
+ my ($name) = @_;
+
+ if ($last_state) {
+ record_failure($last_state) unless ($image_succeeded > 0);
+ }
+ $last_state = $name;
+
+ clearlog();
+ report_performance();
+
+ start_timer($name);
+ $image_succeeded = 0;
+ $suppress_audit = 0;
+}
+
+sub record_success($$$) {
+ my ($name, $url, $base) = @_;
+ if (defined($stats_successes{$name})) {
+ $stats_successes{$name}++;
+ } else {
+ $stats_successes{$name} = 1;
+ }
+
+ stop_timer ($name, 1);
+ my $o = $current_state;
+ $current_state = $name;
+ save_recent_url ($url, $base);
+ $current_state = $o;
+ $image_succeeded = 1;
+ clearlog();
+}
+
+
+sub record_failure($) {
+ my ($name) = @_;
+
+ return if $image_succeeded;
+
+ stop_timer ($name, 0);
+ if ($verbose_load && !$verbose_exec) {
+
+ if ($suppress_audit) {
+ print STDERR "$progname: " . timestr() . "(audit log suppressed)\n";
+ return;
+ }
+
+ my $o = $current_state;
+ $current_state = "DEBUG";
+
+ my $line = "#" x 78;
+ print STDERR "\n\n\n";
+ print STDERR ("#" x 78) . "\n";
+ print STDERR blurb() . "failed to get an image. Full audit log:\n";
+ print STDERR "\n";
+ showlog();
+ print STDERR ("-" x 78) . "\n";
+ print STDERR "\n\n";
+
+ $current_state = $o;
+ }
+ $image_succeeded = 0;
+}
+
+
+
+sub stats_of($) {
+ my ($name) = @_;
+ my $i = $stats_successes{$name};
+ my $j = $stats_attempts{$name};
+ $i = 0 unless $i;
+ $j = 0 unless $j;
+ return "" . ($j ? int($i * 100 / $j) : "0") . "%";
+}
+
+
+my $current_start_time = 0;
+
+sub start_timer($) {
+ my ($name) = @_;
+ $current_start_time = time;
+
+ if (defined($stats_attempts{$name})) {
+ $stats_attempts{$name}++;
+ } else {
+ $stats_attempts{$name} = 1;
+ }
+ if (!defined($stats_elapsed{$name})) {
+ $stats_elapsed{$name} = 0;
+ }
+}
+
+sub stop_timer($$) {
+ my ($name, $success) = @_;
+ $stats_elapsed{$name} += time - $current_start_time;
+}
+
+
+my $last_report_time = 0;
+sub report_performance() {
+
+ return unless $verbose_warnings;
+
+ my $now = time;
+ return unless ($now >= $last_report_time + $report_performance_interval);
+ my $ot = $last_report_time;
+ $last_report_time = $now;
+
+ return if ($ot == 0);
+
+ my $blurb = "$progname: " . timestr();
+
+ print STDERR "\n";
+ print STDERR "${blurb}Current standings:\n";
+
+ foreach my $name (sort keys (%stats_attempts)) {
+ my $try = $stats_attempts{$name};
+ my $suc = $stats_successes{$name} || 0;
+ my $pct = int($suc * 100 / $try);
+ my $secs = $stats_elapsed{$name};
+ my $secs_link = $secs / $try;
+ print STDERR sprintf ("$blurb %-14s %4s (%d/%d);" .
+ " \t %.1f secs/link\n",
+ "$name:", "$pct%", $suc, $try, $secs_link);
+ }
+}
+
+
+
+my $max_recent_images = 400;
+my $max_recent_sites = 20;
+my @recent_images = ();
+my @recent_sites = ();
+
+sub save_recent_url($$) {
+ my ($url, $base) = @_;
+
+ return unless ($verbose_warnings);
+
+ $_ = $url;
+ my ($site) = m@^https?://([^ \t\n\r/:]+)@;
+ return unless defined ($site);
+
+ if ($base eq $driftnet_magic || $base eq $local_magic) {
+ $site = $base;
+ @recent_images = ();
+ }
+
+ my $done = 0;
+ foreach (@recent_images) {
+ if ($_ eq $url) {
+ print STDERR blurb() . "WARNING: recently-duplicated image: $url" .
+ " (on $base via $last_search)\n";
+ $done = 1;
+ last;
+ }
+ }
+
+ # suppress "duplicate site" warning via %warningless_sites.
+ #
+ if ($warningless_sites{$site}) {
+ $done = 1;
+ } elsif ($site =~ m@([^.]+\.[^.]+\.[^.]+)$@ &&
+ $warningless_sites{$1}) {
+ $done = 1;
+ } elsif ($site =~ m@([^.]+\.[^.]+)$@ &&
+ $warningless_sites{$1}) {
+ $done = 1;
+ }
+
+ if (!$done) {
+ foreach (@recent_sites) {
+ if ($_ eq $site) {
+ print STDERR blurb() . "WARNING: recently-duplicated site: $site" .
+ " ($url on $base via $last_search)\n";
+ last;
+ }
+ }
+ }
+
+ push @recent_images, $url;
+ push @recent_sites, $site;
+ shift @recent_images if ($#recent_images >= $max_recent_images);
+ shift @recent_sites if ($#recent_sites >= $max_recent_sites);
+}
+
+
+
+##############################################################################
+#
+# other utilities
+#
+##############################################################################
+
+# Does %-decoding.
+#
+sub url_decode($) {
+ ($_) = @_;
+ tr/+/ /;
+ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
+ return $_;
+}
+
+
+# Given the raw body of a GIF document, returns the dimensions of the image.
+#
+sub gif_size($) {
+ my ($body) = @_;
+ my $type = substr($body, 0, 6);
+ my $s;
+ return () unless ($type =~ /GIF8[7,9]a/);
+ $s = substr ($body, 6, 10);
+ my ($a,$b,$c,$d) = unpack ("C"x4, $s);
+ return () unless defined ($d);
+ return (($b<<8|$a), ($d<<8|$c));
+}
+
+# Given the raw body of a JPEG document, returns the dimensions of the image.
+#
+sub jpeg_size($) {
+ my ($body) = @_;
+ my $i = 0;
+ my $L = length($body);
+
+ my $c1 = substr($body, $i, 1); $i++;
+ my $c2 = substr($body, $i, 1); $i++;
+ return () unless (ord($c1) == 0xFF && ord($c2) == 0xD8);
+
+ my $ch = "0";
+ while (ord($ch) != 0xDA && $i < $L) {
+ # Find next marker, beginning with 0xFF.
+ while (ord($ch) != 0xFF) {
+ return () if (length($body) <= $i);
+ $ch = substr($body, $i, 1); $i++;
+ }
+ # markers can be padded with any number of 0xFF.
+ while (ord($ch) == 0xFF) {
+ return () if (length($body) <= $i);
+ $ch = substr($body, $i, 1); $i++;
+ }
+
+ # $ch contains the value of the marker.
+ my $marker = ord($ch);
+
+ if (($marker >= 0xC0) &&
+ ($marker <= 0xCF) &&
+ ($marker != 0xC4) &&
+ ($marker != 0xCC)) { # it's a SOFn marker
+ $i += 3;
+ return () if (length($body) <= $i);
+ my $s = substr($body, $i, 4); $i += 4;
+ my ($a,$b,$c,$d) = unpack("C"x4, $s);
+ return (($c<<8|$d), ($a<<8|$b));
+
+ } else {
+ # We must skip variables, since FFs in variable names aren't
+ # valid JPEG markers.
+ return () if (length($body) <= $i);
+ my $s = substr($body, $i, 2); $i += 2;
+ my ($c1, $c2) = unpack ("C"x2, $s);
+ my $length = ($c1 << 8) | $c2;
+ return () if ($length < 2);
+ $i += $length-2;
+ }
+ }
+ return ();
+}
+
+# Given the raw body of a PNG document, returns the dimensions of the image.
+#
+sub png_size($) {
+ my ($body) = @_;
+ return () unless ($body =~ m/^\211PNG\r/);
+ my ($bits) = ($body =~ m/^.{12}(.{12})/s);
+ return () unless defined ($bits);
+ return () unless ($bits =~ /^IHDR/);
+ my ($ign, $w, $h) = unpack("a4N2", $bits);
+ return ($w, $h);
+}
+
+
+# Given the raw body of a PNM document, returns the dimensions of the image.
+#
+sub pnm_size($) {
+ my ($body) = @_;
+ return () unless ($body =~ m/^P[1-6]\r?\n(\d+) +(\d+)\r?\n/s);
+ return ($1, $2);
+}
+
+
+# Given the raw body of a GIF, JPEG, or PNG document, returns the dimensions
+# of the image.
+#
+sub image_size($) {
+ my ($body) = @_;
+ my ($w, $h) = gif_size ($body);
+ if ($w && $h) { return ($w, $h); }
+ ($w, $h) = jpeg_size ($body);
+ if ($w && $h) { return ($w, $h); }
+ return png_size ($body);
+ if ($w && $h) { return ($w, $h); }
+ return pnm_size ($body);
+}
+
+
+# returns the full path of the named program, or undef.
+#
+sub which($) {
+ my ($prog) = @_;
+ foreach (split (/:/, $ENV{PATH})) {
+ my $path = "$_/$prog";
+ if (-x $path) {
+ return $path;
+ }
+ }
+ return undef;
+}
+
+
+# Like rand(), but chooses numbers with a bell curve distribution.
+sub bellrand(;$) {
+ ($_) = @_;
+ $_ = 1.0 unless defined($_);
+ $_ /= 3.0;
+ return (rand($_) + rand($_) + rand($_));
+}
+
+
+sub exit_cleanup() {
+ x_cleanup();
+ print STDERR "$progname: exiting\n" if ($verbose_warnings);
+ if (@pids_to_kill) {
+ print STDERR blurb() . "killing: " . join(' ', @pids_to_kill) . "\n";
+ kill ('TERM', @pids_to_kill);
+ }
+}
+
+sub signal_cleanup($) {
+ my ($sig) = @_;
+ print STDERR blurb() . (defined($sig)
+ ? "caught signal $sig."
+ : "exiting.")
+ . "\n"
+ if ($verbose_exec || $verbose_warnings);
+ exit 1;
+}
+
+
+
+##############################################################################
+#
+# Generating a list of urls only
+#
+##############################################################################
+
+sub url_only_output() {
+ do {
+ my ($base, $img) = pick_image;
+ if ($img) {
+ $base =~ s/ /%20/g;
+ $img =~ s/ /%20/g;
+ print "$img $base\n";
+ }
+ } while (1);
+}
+
+##############################################################################
+#
+# Running as an xscreensaver module, or as a web page imagemap
+#
+##############################################################################
+
+my ($image_png, $image_tmp1, $image_tmp2);
+{
+ my $seed = rand(0xFFFFFFFF);
+ $image_png = sprintf ("%s/webcollage-%08x",
+ ($ENV{TMPDIR} ? $ENV{TMPDIR} : "/tmp"),
+ $seed);
+ $image_tmp1 = $image_png . '-1.png';
+ $image_tmp2 = $image_png . '-2.png';
+ $image_png .= '.png';
+}
+
+
+my $filter_cmd = undef;
+my $post_filter_cmd = undef;
+my $background = undef;
+
+my @imagemap_areas = ();
+my $imagemap_html_tmp = undef;
+my $imagemap_jpg_tmp = undef;
+
+
+my $img_width; # size of the image being generated.
+my $img_height;
+
+my $delay = 2;
+
+sub x_cleanup() {
+ unlink $image_png, $image_tmp1, $image_tmp2;
+ unlink $imagemap_html_tmp, $imagemap_jpg_tmp
+ if (defined ($imagemap_html_tmp));
+}
+
+
+# Like system, but prints status about exit codes, and kills this process
+# with whatever signal killed the sub-process, if any.
+#
+sub nontrapping_system(@) {
+ $! = 0;
+
+ $_ = join(" ", @_);
+ s/\"[^\"]+\"/\"...\"/g;
+
+ LOG ($verbose_exec, "executing \"$_\"");
+
+ my $rc = system @_;
+
+ if ($rc == 0) {
+ LOG ($verbose_exec, "subproc exited normally.");
+ } elsif (($rc & 0xff) == 0) {
+ $rc >>= 8;
+ LOG ($verbose_exec, "subproc exited with status $rc.");
+ } else {
+ if ($rc & 0x80) {
+ LOG ($verbose_exec, "subproc dumped core.");
+ $rc &= ~0x80;
+ }
+ LOG ($verbose_exec, "subproc died with signal $rc.");
+ # die that way ourselves.
+ kill $rc, $$;
+ }
+
+ return $rc;
+}
+
+
+# Creates a solid-colored PNG.
+#
+sub pngmake($$$$) {
+ my ($outfile, $bgcolor, $w, $h) = @_;
+
+ my @cmd;
+ if ($webcollage_helper) {
+ @cmd = ($webcollage_helper, $bgcolor, $w, $h, $outfile);
+ } else {
+ @cmd = ($convert_cmd, '-size', "${w}x${h}", "xc:$bgcolor", $outfile);
+ }
+
+ my $rc = nontrapping_system (@cmd);
+ if ($rc != 0) {
+ LOG(0, "failed to create $bgcolor image: \"$outfile\"");
+ exit(1);
+ }
+}
+
+
+sub pick_root_displayer() {
+ my @names = ();
+
+ if ($cocoa_p) {
+ # see "xscreensaver/hacks/webcollage-cocoa.m"
+ return "echo COCOA LOAD ";
+ }
+
+ foreach my $cmd (@root_displayers) {
+ $_ = $cmd;
+ my ($name) = m/^([^ ]+)/;
+ push @names, "\"$name\"";
+ LOG ($verbose_exec, "looking for $name...");
+ foreach my $dir (split (/:/, $ENV{PATH})) {
+ LOG ($verbose_exec, " checking $dir/$name");
+ return $cmd if (-x "$dir/$name");
+ }
+ }
+
+ $names[$#names] = "or " . $names[$#names];
+ error "none of: " . join (", ", @names) . " were found on \$PATH.";
+}
+
+
+my $png_to_root_window_cmd = undef;
+
+
+sub x_or_image_output($) {
+ my ($window_id) = @_;
+
+ # Adjust the PATH for OS X 10.10.
+ #
+ $_ = $0;
+ s:/[^/]*$::;
+ s/([^a-zA-Z0-9._\-+\/])/\\$1/g;
+ $ENV{PATH} = "$_:$ENV{PATH}";
+
+ # Check for our helper program, to see whether we need to use imagemagick.
+ #
+ $_ = "webcollage-helper";
+
+ if (! defined ($webcollage_helper)) {
+ $webcollage_helper = which ($_);
+ }
+
+ if (defined ($webcollage_helper)) {
+ LOG ($verbose_decode, "found \"$webcollage_helper\"");
+ } else {
+ LOG (($verbose_decode || $verbose_load), "no $_ program");
+ }
+
+ if ($cocoa_p && !defined ($webcollage_helper)) {
+ error ("webcollage-helper not found in Cocoa-mode!");
+ }
+
+ if (!$cocoa_p && defined ($webcollage_helper)) {
+ foreach ($image_png, $image_tmp1, $image_tmp2) {
+ s/\.png$/.jpg/si;
+ }
+ }
+
+ # make sure the various programs we execute exist, right up front.
+ #
+ my @progs = ();
+
+ push @progs, $convert_cmd unless defined($webcollage_helper);
+
+ foreach (@progs) {
+ which ($_) || error "$_ not found on \$PATH.";
+ }
+
+ # find a root-window displayer program.
+ #
+ if (!$no_output_p) {
+ $png_to_root_window_cmd = pick_root_displayer();
+ }
+
+ if (defined ($window_id)) {
+ error ("-window-id only works if xscreensaver-getimage is installed")
+ unless ($png_to_root_window_cmd =~ m/^xscreensaver-getimage\b/);
+
+ error ("unparsable window id: $window_id")
+ unless ($window_id =~ m/^\d+$|^0x[\da-f]+$/i);
+ $png_to_root_window_cmd =~ s/--?root\b/$window_id/ ||
+ error ("unable to munge displayer: $png_to_root_window_cmd");
+ }
+
+ if (!$img_width || !$img_height) {
+
+ if (!defined ($window_id) &&
+ defined ($ENV{XSCREENSAVER_WINDOW})) {
+ $window_id = $ENV{XSCREENSAVER_WINDOW};
+ }
+
+ if (!defined ($window_id)) {
+ $_ = "xdpyinfo";
+ which ($_) || error "$_ not found on \$PATH.";
+ $_ = `$_`;
+ ($img_width, $img_height) = m/dimensions: *(\d+)x(\d+) /;
+ if (!defined($img_height)) {
+ error "xdpyinfo failed.";
+ }
+ } else { # we have a window id
+ $_ = "xwininfo";
+ which ($_) || error "$_ not found on \$PATH.";
+ $_ .= " -id $window_id";
+ $_ = `$_`;
+ ($img_width, $img_height) = m/^\s*Width:\s*(\d+)\n\s*Height:\s*(\d+)\n/m;
+
+ if (!defined($img_height)) {
+ error "xwininfo failed.";
+ }
+ }
+ }
+
+ my $bgcolor = "#000000";
+ my $bgimage = undef;
+
+ if ($background) {
+ if ($background =~ m/^\#[0-9a-f]+$/i) {
+ $bgcolor = $background;
+
+ } elsif (-r $background) {
+ $bgimage = $background;
+
+ } elsif (! $background =~ m@^[-a-z0-9 ]+$@i) {
+ error "not a color or readable file: $background";
+
+ } else {
+ # default to assuming it's a color
+ $bgcolor = $background;
+ }
+ }
+
+ # Create the sold-colored base image.
+ #
+ LOG ($verbose_decode, "creating base image: ${img_width}x${img_height}");
+ $_ = pngmake ($image_png, $bgcolor, $img_width, $img_height);
+
+ # Paste the default background image in the middle of it.
+ #
+ if ($bgimage) {
+ open (my $in, '<:raw', $bgimage) || error ("$bgimage: $!");
+ local $/ = undef; # read entire file
+ my $body = <$in>;
+ close ($in) || error ("$bgimage: $!");
+ paste_image ('init', $image_png, $body, 'init', 1);
+ }
+
+ clearlog();
+
+ while (1) {
+ my ($base, $img) = pick_image();
+ my $source = $current_state;
+ $current_state = "loadimage";
+ if ($img) {
+ my ($headers, $body) = get_document ($img, $base);
+ if ($body) {
+ paste_image ($base, $img, $body, $source);
+ $body = undef;
+ }
+ }
+ $current_state = "idle";
+ $load_method = "none";
+
+ unlink $image_tmp1, $image_tmp2;
+ sleep $delay;
+ }
+}
+
+sub paste_image($$$$;$) {
+ my ($base, $img, $body, $source, $init_p) = @_;
+
+ $current_state = "paste";
+
+ $suppress_audit = 0;
+
+ LOG ($verbose_decode, "got $img (" . length($body) . ")");
+
+ my ($iw, $ih) = image_size ($body);
+ if (!$iw || !$ih) {
+ LOG (($verbose_decode || $verbose_load),
+ "not a GIF, JPG, or PNG" .
+ (($body =~ m@<(base|html|head|body|script|table|a href)>@i)
+ ? " (looks like HTML)" : "") .
+ ": $img");
+ $suppress_audit = 1;
+ $body = undef;
+ return 0;
+ }
+
+ if ($iw <= 0 || $ih <= 0 || $iw > 9999 || $ih > 9999) {
+ LOG (($verbose_decode || $verbose_load),
+ "ludicrous image dimensions: $iw x $ih (" . length($body) .
+ "): $img");
+ $body = undef;
+ return 0;
+ }
+
+ open (my $out, '>:raw', $image_tmp1) || error ("writing $image_tmp1: $!");
+ (print $out $body) || error ("writing $image_tmp1: $!");
+ close ($out) || error ("writing $image_tmp1: $!");
+
+ record_success ($load_method, $img, $base);
+
+ my $ow = $iw; # used only for error messages
+ my $oh = $ih;
+
+ # don't just tack this onto the front of the pipeline -- we want it to
+ # be able to change the size of the input image.
+ #
+ if ($filter_cmd && !$init_p) {
+ LOG ($verbose_decode, "running $filter_cmd");
+
+ # #### Historically, $filter_cmd read and write PPM files.
+ # This is doing PNG or JPEG now. I'll bet nobody uses this.
+
+ my $rc = nontrapping_system "($filter_cmd) < $image_tmp1 >$image_tmp2";
+ if ($rc != 0) {
+ LOG(($verbose_decode || $verbose_load),
+ "failed command: \"$filter_cmd\"");
+ LOG(($verbose_decode || $verbose_load),
+ "failed URL: \"$img\" (${ow}x$oh)");
+ return;
+ }
+ rename ($image_tmp2, $image_tmp1);
+
+ # re-get the width/height in case the filter resized it.
+ open (my $imgf, '<:raw', $image_tmp1) || return 0;
+ my $b = '';
+ sysread ($imgf, $b, 10240);
+ close $imgf;
+ ($iw, $ih) = image_size ($b);
+ return 0 unless ($iw && $ih);
+ }
+
+ my $target_w = $img_width; # max rectangle into which the image must fit
+ my $target_h = $img_height;
+
+ my $scale = 1.0;
+
+ my $crop_x = 0; # the sub-rectangle of the image
+ my $crop_y = 0; # that we will actually paste.
+ my $crop_w = $iw;
+ my $crop_h = $ih;
+ my $x = 0;
+ my $y = 0;
+
+ if (!$init_p) {
+
+ # Usually scale the image to fit on the screen -- but sometimes scale it
+ # to fit on half or a quarter of the screen. (We do this by reducing the
+ # size of the target rectangle.) Note that the image is not merely scaled
+ # to fit; we instead cut the image in half repeatedly until it fits in the
+ # target rectangle -- that gives a wider distribution of sizes.
+ #
+ if (rand() < 0.3) { $target_w /= 2; $target_h /= 2; } # reduce target rect
+ if (rand() < 0.3) { $target_w /= 2; $target_h /= 2; }
+
+ if ($iw > $target_w || $ih > $target_h) {
+ while ($iw > $target_w ||
+ $ih > $target_h) {
+ $iw = int($iw / 2);
+ $ih = int($ih / 2);
+ $scale /= 2;
+ }
+ if ($iw <= 10 || $ih <= 10) {
+ LOG ($verbose_decode, "scaling ${ow}x${oh} to ${iw}x$ih" .
+ " would have been bogus.");
+ return 0;
+ }
+
+ $crop_w = $iw;
+ $crop_h = $ih;
+
+ LOG ($verbose_decode, "scaling ${ow}x${oh} to ${iw}x$ih ($scale)");
+ }
+
+
+ my $src = $image_tmp1;
+
+ # The chance that we will randomly crop out a section of an image starts
+ # out fairly low, but goes up for images that are very large, or images
+ # that have ratios that make them look like banners (we try to avoid
+ # banner images entirely, but they slip through when the IMG tags didn't
+ # have WIDTH and HEIGHT specified.)
+ #
+ my $crop_chance = 0.2;
+ if ($iw > $img_width * 0.4 || $ih > $img_height * 0.4) {
+ $crop_chance += 0.2;
+ }
+ if ($iw > $img_width * 0.7 || $ih > $img_height * 0.7) {
+ $crop_chance += 0.2;
+ }
+ if ($min_ratio && ($iw * $min_ratio) > $ih) {
+ $crop_chance += 0.7;
+ }
+
+ if ($crop_chance > 0.1) {
+ LOG ($verbose_decode, "crop chance: $crop_chance");
+ }
+
+ if (rand() < $crop_chance) {
+
+ my $ow = $crop_w;
+ my $oh = $crop_h;
+
+ if ($crop_w > $min_width) {
+ # if it's a banner, select the width linearly.
+ # otherwise, select a bell.
+ my $r = (($min_ratio && ($iw * $min_ratio) > $ih)
+ ? rand()
+ : bellrand());
+ $crop_w = $min_width + int ($r * ($crop_w - $min_width));
+ $crop_x = int (rand() * ($ow - $crop_w));
+ }
+ if ($crop_h > $min_height) {
+ # height always selects as a bell.
+ $crop_h = $min_height + int (bellrand() * ($crop_h - $min_height));
+ $crop_y = int (rand() * ($oh - $crop_h));
+ }
+
+ # Clip it to the actual post-scaling image size.
+ if ($crop_x + $crop_w > $iw) { $crop_w = $iw - $crop_x; }
+ if ($crop_y + $crop_h > $ih) { $crop_h = $ih - $crop_y; }
+ if ($crop_x < 0) { $crop_w += $crop_x; $crop_x = 0; }
+ if ($crop_y < 0) { $crop_h += $crop_y; $crop_y = 0; }
+
+ if ($crop_x != 0 || $crop_y != 0 ||
+ $crop_w != $iw || $crop_h != $ih) {
+ LOG ($verbose_decode,
+ "randomly cropping to ${crop_w}x$crop_h \@ $crop_x,$crop_y");
+ }
+ }
+
+ # Where the image should logically land -- this might be negative.
+ #
+ $x = int((rand() * ($img_width + $crop_w/2)) - $crop_w*3/4);
+ $y = int((rand() * ($img_height + $crop_h/2)) - $crop_h*3/4);
+
+ # if we have chosen to paste the image outside of the rectangle of the
+ # screen, then we need to crop it.
+ #
+ if ($x < 0 ||
+ $y < 0 ||
+ $x + $crop_w > $img_width ||
+ $y + $crop_h > $img_height) {
+
+ LOG ($verbose_decode,
+ "cropping for effective paste of ${crop_w}x${crop_h} \@ $x,$y");
+
+ if ($x < 0) { $crop_x -= $x; $crop_w += $x; $x = 0; }
+ if ($y < 0) { $crop_y -= $y; $crop_h += $y; $y = 0; }
+
+ if ($x + $crop_w >= $img_width) { $crop_w = $img_width - $x - 1; }
+ if ($y + $crop_h >= $img_height) { $crop_h = $img_height - $y - 1; }
+ }
+
+ # If any cropping needs to happen, add pnmcut.
+ #
+ if ($crop_x != 0 || $crop_y != 0 ||
+ $crop_w != $iw || $crop_h != $ih) {
+ $iw = $crop_w;
+ $ih = $crop_h;
+ LOG ($verbose_decode, "cropping to ${crop_w}x$crop_h \@ " .
+ "$crop_x,$crop_y");
+ }
+
+ LOG ($verbose_decode, "pasting ${iw}x$ih \@ $x,$y in $image_png");
+ }
+
+ my @cmd;
+ if (defined ($webcollage_helper)) {
+ @cmd = ($webcollage_helper,
+ $image_tmp1, $image_png,
+ $scale, $opacity,
+ $crop_x, $crop_y, $x, $y,
+ $iw, $ih);
+ } else {
+ @cmd = ($convert_cmd,
+ $image_png,
+ '(',
+ $image_tmp1 . '[0]',
+ '-scale', sprintf("%.2f%%", 100 * $scale),
+ '-crop', "${iw}x${ih}+${crop_x}+${crop_y}",
+ '-geometry', "+${x}+${y}",
+
+ ($init_p ? () :
+ (
+ # Blurry edges with rounded corners
+ '-alpha', 'set',
+ '-virtual-pixel', 'transparent',
+ '-channel', 'A',
+ '-blur', '0x12',
+ '-level', '50%,100%',
+
+ # Overall transparency
+ '-evaluate', 'multiply', $opacity,
+
+ '+channel',
+ )),
+ ')',
+ '-composite',
+ '+repage',
+ '-strip',
+ $image_png);
+ }
+
+ #### $verbose_decode should mean 2>/dev/null
+
+ my $rc = nontrapping_system (@cmd);
+
+ if (-z $image_png) {
+ LOG (1, "failed command: \"@cmd\"");
+ print STDERR "\naudit log:\n\n\n";
+ print STDERR ("#" x 78) . "\n";
+ print STDERR blurb() . "$image_png has zero size\n";
+ showlog();
+ print STDERR "\n\n";
+ exit (1);
+ }
+
+ if ($rc != 0) {
+ LOG (($verbose_decode || $verbose_load), "failed command: \"@cmd\"");
+ LOG (($verbose_decode || $verbose_load),
+ "failed URL: \"$img\" (${ow}x$oh)");
+ return;
+ }
+
+ my $target = "$image_png";
+
+ # don't just tack this onto the end of the pipeline -- we don't want it
+ # to end up in $image_png, because we don't want the results to be
+ # cumulative.
+ #
+ if ($post_filter_cmd) {
+
+ # #### Historically, $post_filter_cmd read and write PPM files.
+ # This is doing PNG or JPEG now. I'll bet nobody uses this.
+
+ $target = $image_tmp1;
+ my $cmd = "($post_filter_cmd) < $image_png > $target";
+ $rc = nontrapping_system ($cmd);
+ if ($rc != 0) {
+ LOG ($verbose_decode, "filter failed: \"$post_filter_cmd\"\n");
+ return;
+ }
+ }
+
+ if (!$no_output_p) {
+ my $tsize = (stat($target))[7];
+ if ($tsize > 200) {
+ my $cmd = "$png_to_root_window_cmd $target";
+
+ # xv seems to hate being killed. it tends to forget to clean
+ # up after itself, and leaves windows around and colors allocated.
+ # I had this same problem with vidwhacker, and I'm not entirely
+ # sure what I did to fix it. But, let's try this: launch xv
+ # in the background, so that killing this process doesn't kill it.
+ # it will die of its own accord soon enough. So this means we
+ # start pumping bits to the root window in parallel with starting
+ # the next network retrieval, which is probably a better thing
+ # to do anyway.
+ #
+ $cmd .= " &" unless ($cocoa_p);
+
+ $rc = nontrapping_system ($cmd);
+
+ if ($rc != 0) {
+ LOG (($verbose_decode || $verbose_load), "display failed: \"$cmd\"");
+ return;
+ }
+
+ } else {
+ LOG ($verbose_decode, "$target size is $tsize");
+ }
+ }
+
+ if (defined($source)) {
+ $source .= "-" . stats_of($source);
+ print STDOUT "image: ${iw}x${ih} @ $x,$y $base $source\n"
+ if ($verbose_imgmap);
+ if ($imagemap_base) {
+ update_imagemap ($base, $x, $y, $iw, $ih,
+ $image_png, $img_width, $img_height);
+ }
+ }
+
+ clearlog();
+
+ return 1;
+}
+
+
+sub update_imagemap($$$$$$$$) {
+ my ($url, $x, $y, $w, $h, $image_png, $image_width, $image_height) = @_;
+
+ $current_state = "imagemap";
+
+ my $max_areas = 200;
+
+ $url = html_quote ($url);
+ push @imagemap_areas, [$x, $y, $w, $h, $url];
+ shift @imagemap_areas if (@imagemap_areas > $max_areas);
+ LOG ($verbose_decode, "area: $x,$y,$w,$h");
+
+ my $map_name = $imagemap_base;
+ $map_name =~ s@^.*/@@;
+ $map_name = 'collage' if ($map_name eq '');
+
+ my $imagemap_html = $imagemap_base . ".html";
+ my $imagemap_jpg = $imagemap_base . ".jpg";
+ my $imagemap_jpg2 = $imagemap_jpg;
+ $imagemap_jpg2 =~ s@^.*/@@gs;
+
+ if (!defined ($imagemap_html_tmp)) {
+ $imagemap_html_tmp = $imagemap_html . sprintf (".%08x", rand(0xffffffff));
+ $imagemap_jpg_tmp = $imagemap_jpg . sprintf (".%08x", rand(0xffffffff));
+ }
+
+ # Read the imagemap html file (if any) to get a template.
+ #
+ my $template_html = '';
+ {
+ if (open (my $in, '<', $imagemap_html)) {
+ local $/ = undef; # read entire file
+ $template_html = <$in>;
+ close $in;
+ LOG ($verbose_decode, "read template $imagemap_html");
+ }
+
+ if (! ($template_html =~ m/\.webcollage_box\b/s)) { # missing or old
+ $template_html =
+ '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<HTML>
+ <HEAD>
+ <BASE TARGET="_new">
+ <meta HTTP-EQUIV="Refresh" content="60" />
+ <TITLE>WebCollage</TITLE>
+ <STYLE TYPE="text/css">
+ <!--
+ body { color: #FFF; max-width: 100%; }
+ .webcollage_date, .webcollage_size {
+ display: block; margin-top: 4px; font-size: 7pt; color: #888;
+ }
+ .webcollage_date { float: left; }
+ .webcollage_size { float: right; }
+
+ .webcollage_frame {
+ overflow: hidden;
+ position: relative;
+ padding-bottom: 56.25%;
+ padding-bottom: 75%; /* 4:3 aspect ratio */
+ border: 1px solid #888;
+ background: #000;
+ }
+
+ .webcollage_box {
+ position: absolute; top: 0; left: 0;
+ border: 0; margin: 0; padding: 0;
+ width: 100%;
+ height: 100%;
+ }
+
+ .webcollage_box > img { width: 100%; height: 100%; border: 0; }
+
+ .webcollage_frame > a {
+ display: block;
+ position: absolute;
+ border-radius: 16px;
+ }
+
+ .webcollage_frame > a:hover {
+ background: rgba(1,1,1,.25);
+ }
+ -->
+ </STYLE>
+ </HEAD>
+ <BODY>
+ <DIV CLASS="webcollage_frame">
+ </DIV>
+ </BODY>
+</HTML>
+';
+
+ LOG ($verbose_decode, "created dummy template");
+ }
+ }
+
+ # Write the jpg to a tmp file
+ #
+ {
+ my @cmd;
+ if (defined($webcollage_helper)) {
+ @cmd = ('cp', '-p', $image_png, $imagemap_jpg_tmp);
+ } else {
+ @cmd = ($convert_cmd, $image_png, 'jpeg:' . $imagemap_jpg_tmp);
+ }
+ my $rc = nontrapping_system (@cmd);
+ if ($rc != 0) {
+ error ("imagemap jpeg failed: \"@cmd\"\n");
+ }
+ }
+
+ # Write the html to a tmp file
+ #
+ {
+ my $body = $template_html;
+ my $img = (" <DIV CLASS=\"webcollage_box\">" .
+ "<IMG SRC=\"$imagemap_jpg2\">" .
+ "</DIV>\n");
+ foreach my $a (@imagemap_areas) {
+ my ($x, $y, $w, $h, $u) = @$a;
+ $x /= $img_width / 100;
+ $y /= $img_height / 100;
+ $w /= $img_width / 100;
+ $h /= $img_height / 100;
+ foreach ($x, $y, $w, $h) { $_ = sprintf("%.1f%%", $_); }
+ $u = html_quote($u);
+ $img .= (" <A HREF=\"$u\" STYLE=\"" .
+ "left:$x;top:$y;width:$w;height:$h\"/>\n");
+ }
+
+ $img = ("<DIV CLASS=\"webcollage_frame\">\n" .
+ $img .
+ " </DIV>\n");
+ $body =~ s@<DIV \s+ CLASS=[\"\']webcollage_frame[\"\']>
+ .*? </DIV> .*? </DIV>@$img@sex ||
+ error ("$imagemap_html_tmp: unable to splice image");
+
+
+ # if there are magic webcollage spans in the html, update those too.
+ #
+ {
+ my @st = stat ($imagemap_jpg_tmp);
+ my $date = strftime("%d-%b-%Y %l:%M:%S %p %Z", localtime($st[9]));
+ my $size = int(($st[7] / 1024) + 0.5) . "K";
+ $body =~ s@(<SPAN\s+CLASS=\"webcollage_date\">).*?(</SPAN>)@$1$date$2@si;
+ $body =~ s@(<SPAN\s+CLASS=\"webcollage_size\">).*?(</SPAN>)@$1$size$2@si;
+ }
+
+ open (my $out, '>', $imagemap_html_tmp) || error("$imagemap_html_tmp: $!");
+ (print $out $body) || error("$imagemap_html_tmp: $!");
+ close ($out) || error("$imagemap_html_tmp: $!");
+ LOG ($verbose_decode, "wrote $imagemap_html_tmp");
+ }
+
+ # Rename the two tmp files to the real files
+ #
+ rename ($imagemap_html_tmp, $imagemap_html) ||
+ error "renaming $imagemap_html_tmp to $imagemap_html";
+ LOG ($verbose_decode, "wrote $imagemap_html");
+
+ if ($imagemap_jpg_tmp ne $image_png) {
+ rename ($imagemap_jpg_tmp, $imagemap_jpg) ||
+ error "renaming $imagemap_jpg_tmp to $imagemap_jpg";
+ LOG ($verbose_decode, "wrote $imagemap_jpg");
+ }
+}
+
+
+# Figure out what the proxy server should be, either from environment
+# variables or by parsing the output of the (MacOS) program "scutil",
+# which tells us what the system-wide proxy settings are.
+#
+sub set_proxy() {
+
+ if (! defined($http_proxy)) {
+ # historical suckage: the environment variable name is lower case.
+ $http_proxy = $ENV{http_proxy} || $ENV{HTTP_PROXY};
+ }
+
+ if (defined ($http_proxy)) {
+ if ($http_proxy && $http_proxy =~ m@^https?://([^/]*)/?$@ ) {
+ # historical suckage: allow "http://host:port" as well as "host:port".
+ $http_proxy = $1;
+ }
+
+ } else {
+ my $proxy_data = `scutil --proxy 2>/dev/null`;
+ my ($server) = ($proxy_data =~ m/\bHTTPProxy\s*:\s*([^\s]+)/s);
+ my ($port) = ($proxy_data =~ m/\bHTTPPort\s*:\s*([^\s]+)/s);
+ # Note: this ignores the "ExceptionsList".
+ if ($server) {
+ $http_proxy = $server;
+ $http_proxy .= ":$port" if $port;
+ }
+ }
+
+ delete $ENV{http_proxy};
+ delete $ENV{HTTP_PROXY};
+ delete $ENV{https_proxy};
+ delete $ENV{HTTPS_PROXY};
+ delete $ENV{PERL_LWP_ENV_PROXY};
+
+ if ($http_proxy) {
+ $http_proxy = 'http://' . $http_proxy;
+ LOG ($verbose_net, "proxy server: $http_proxy");
+ } else {
+ $http_proxy = undef; # for --proxy ''
+ }
+}
+
+
+sub init_signals() {
+
+ $SIG{HUP} = \&signal_cleanup;
+ $SIG{INT} = \&signal_cleanup;
+ $SIG{QUIT} = \&signal_cleanup;
+ $SIG{ABRT} = \&signal_cleanup;
+ $SIG{KILL} = \&signal_cleanup;
+ $SIG{TERM} = \&signal_cleanup;
+
+ # Need this so that if subprocess filters die, we don't die.
+ $SIG{PIPE} = 'IGNORE';
+}
+
+END { exit_cleanup(); }
+
+
+sub main() {
+ $| = 1;
+ srand(time ^ $$);
+
+ my $verbose = 0;
+ my $dict;
+ my $driftnet_cmd = 0;
+
+ $current_state = "init";
+ $load_method = "none";
+
+ my $root_p = 0;
+ my $window_id = undef;
+
+ while ($#ARGV >= 0) {
+ $_ = shift @ARGV;
+ if (m/^--?d(i(s(p(l(a(y)?)?)?)?)?)?$/s) {
+ $ENV{DISPLAY} = shift @ARGV;
+ } elsif (m/^--?root$/s) {
+ $root_p = 1;
+ } elsif (m/^--?window-id$/s) {
+ $window_id = shift @ARGV;
+ $root_p = 1;
+ } elsif (m/^--?no-output$/s) {
+ $no_output_p = 1;
+ } elsif (m/^--?urls(-only)?$/s) {
+ $urls_only_p = 1;
+ $no_output_p = 1;
+ } elsif (m/^--?cocoa$/s) {
+ $cocoa_p = 1;
+ } elsif (m/^--?imagemap$/s) {
+ $imagemap_base = shift @ARGV;
+ $no_output_p = 1;
+ } elsif (m/^--?verbose$/s) {
+ $verbose++;
+ } elsif (m/^-v+$/) {
+ $verbose += length($_)-1;
+ } elsif (m/^--?delay$/s) {
+ $delay = shift @ARGV;
+ } elsif (m/^--?timeout$/s) {
+ $http_timeout = shift @ARGV;
+ } elsif (m/^--?filter$/s) {
+ $filter_cmd = shift @ARGV;
+ } elsif (m/^--?filter2$/s) {
+ $post_filter_cmd = shift @ARGV;
+ } elsif (m/^--?(background|bg)$/s) {
+ $background = shift @ARGV;
+ } elsif (m/^--?size$/s) {
+ $_ = shift @ARGV;
+ if (m@^(\d+)x(\d+)$@) {
+ $img_width = $1;
+ $img_height = $2;
+ } else {
+ error "argument to \"--size\" must be of the form \"640x400\"";
+ }
+ } elsif (m/^--?(http-)?proxy$/s) {
+ $http_proxy = shift @ARGV;
+ } elsif (m/^--?dict(ionary)?$/s) {
+ $dict = shift @ARGV;
+ } elsif (m/^--?opacity$/s) {
+ $opacity = shift @ARGV;
+ error ("opacity must be between 0.0 and 1.0")
+ if ($opacity <= 0 || $opacity > 1);
+ } elsif (m/^--?driftnet$/s) {
+ @search_methods = ( 100, "driftnet", \&pick_from_driftnet );
+ if (! ($ARGV[0] =~ m/^-/)) {
+ $driftnet_cmd = shift @ARGV;
+ } else {
+ $driftnet_cmd = $default_driftnet_cmd;
+ }
+ } elsif (m/^--?dir(ectory)?$/s) {
+ @search_methods = ( 100, "local", \&pick_from_local_dir );
+ if (! ($ARGV[0] =~ m/^-/)) {
+ $local_dir = shift @ARGV;
+ } else {
+ error ("local directory path must be set")
+ }
+ } elsif (m/^--?fps$/s) {
+ # -fps only works on MacOS, via "webcollage-cocoa.m".
+ # Ignore it if passed to this script in an X11 context.
+ } elsif (m/^--?debug$/s) {
+ my $which = shift @ARGV;
+ my @rest = @search_methods;
+ my $ok = 0;
+ while (@rest) {
+ my $pct = shift @rest;
+ my $name = shift @rest;
+ my $tfn = shift @rest;
+
+ if ($name eq $which) {
+ @search_methods = (100, $name, $tfn);
+ $ok = 1;
+ last;
+ }
+ }
+ error "no such search method as \"$which\"" unless ($ok);
+ LOG (1, "DEBUG: using only \"$which\"");
+ $report_performance_interval = 30;
+
+ } else {
+ print STDERR "unknown option: $_\n\n";
+ print STDERR "$copyright\nusage: $progname " .
+ "[--root] [--display dpy] [--verbose] [--debug which]\n" .
+ "\t\t [--timeout secs] [--delay secs] [--size WxH]\n" .
+ "\t\t [--no-output] [--urls-only] [--imagemap filename]\n" .
+ "\t\t [--background color] [--opacity f]\n" .
+ "\t\t [--filter cmd] [--filter2 cmd]\n" .
+ "\t\t [--dictionary dictionary-file] [--http-proxy host[:port]]\n" .
+ "\t\t [--driftnet [driftnet-program-and-args]]\n" .
+ "\t\t [--directory local-image-directory]\n" .
+ "\n";
+ exit 1;
+ }
+ }
+
+ if (!$root_p && !$no_output_p && !$cocoa_p) {
+ print STDERR $copyright;
+ error "the --root argument is mandatory (for now.)";
+ }
+
+ if (!$no_output_p && !$cocoa_p && !$ENV{DISPLAY}) {
+ error "\$DISPLAY is not set.";
+ }
+
+
+ if ($verbose == 1) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+
+ } elsif ($verbose == 2) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+
+ } elsif ($verbose == 3) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+ $verbose_filter = 1;
+
+ } elsif ($verbose == 4) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+ $verbose_filter = 1;
+ $verbose_net = 1;
+
+ } elsif ($verbose == 5) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+ $verbose_filter = 1;
+ $verbose_net = 1;
+ $verbose_decode = 1;
+
+ } elsif ($verbose == 6) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+ $verbose_filter = 1;
+ $verbose_net = 1;
+ $verbose_decode = 1;
+ $verbose_http = 1;
+
+ } elsif ($verbose >= 7) {
+ $verbose_imgmap = 1;
+ $verbose_warnings = 1;
+ $verbose_load = 1;
+ $verbose_filter = 1;
+ $verbose_net = 1;
+ $verbose_decode = 1;
+ $verbose_http = 1;
+ $verbose_exec = 1;
+ }
+
+ if ($dict) {
+ error ("$dict does not exist") unless (-f $dict);
+ $wordlist = $dict;
+ } else {
+ pick_dictionary();
+ }
+
+ if ($imagemap_base && !($img_width && $img_height)) {
+ error ("--size WxH is required with --imagemap");
+ }
+
+ if (defined ($local_dir)) {
+ $_ = "xscreensaver-getimage-file";
+ which ($_) || error "$_ not found on \$PATH.";
+ }
+
+ init_signals();
+ set_proxy();
+
+ spawn_driftnet ($driftnet_cmd) if ($driftnet_cmd);
+
+ if ($urls_only_p) {
+ url_only_output ();
+ } else {
+ x_or_image_output ($window_id);
+ }
+}
+
+main();
+exit (0);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-18 03:42:06 +0200