New SysConfig module for adding a logo

1 files changed, 93 insertions, 0 deletions

diff --git a/inc/download.inc.php b/inc/download.inc.php
new file mode 100644
index 00000000..6485ee24
--- /dev/null
+++ b/inc/download.inc.php
@@ -0,0 +1,93 @@
+<?php
+
+class Download
+{
+
+	/**
+	 * Common initialization for download and downloadToFile
+	 * Return file handle to header file
+	 */
+	private static function initCurl($url, $timeout, &$head)
+	{
+		$ch = curl_init();
+		if ($ch === false)
+			Util::traceError('Could not initialize cURL');
+		curl_setopt($ch, CURLOPT_URL, $url);
+		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, ceil($timeout / 2));
+		curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
+		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+		curl_setopt($ch, CURLOPT_AUTOREFERER, true);
+		curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
+		curl_setopt($ch, CURLOPT_MAXREDIRS, 6);
+		$tmpfile = tempnam('/tmp/', 'bwlp-');
+		$head = fopen($tmpfile, 'w+b');
+		if ($head === false)
+			Util::traceError("Could not open temporary head file $tmpfile for writing.");
+		curl_setopt($ch, CURLOPT_WRITEHEADER, $head);
+		return $ch;
+	}
+
+	/**
+	 * Read 10kb from the given file handle, seek to 0 first,
+	 * close the file after reading. Returns data read
+	 */
+	private static function getContents($fh)
+	{
+		fseek($fh, 0, SEEK_SET);
+		$data = fread($fh, 10000);
+		fclose($fh);
+		return $data;
+	}
+
+	/**
+	 * Download file, obey given timeout in seconds
+	 * Return data on success, false on failure
+	 */
+	public static function asString($url, $timeout, &$code)
+	{
+		$ch = self::initCurl($url, $timeout, $head);
+		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+		$data = curl_exec($ch);
+		$head = self::getContents($head);
+		if (preg_match('#^HTTP/\d+\.\d+ (\d+) #', $head, $out)) {
+			$code = (int) $out[1];
+		} else {
+			$code = 999;
+		}
+		curl_close($ch);
+		return $data;
+	}
+
+	/**
+	 * Download a file from a URL to file.
+	 *
+	 * @param string $target destination path to download file to
+	 * @param string $url URL of file to download
+	 * @param int $timeout timeout in seconds
+	 * @param int $code HTTP status code passed out by reference
+	 * @return boolean
+	 */
+	public static function toFile($target, $url, $timeout, &$code)
+	{
+		$fh = fopen($target, 'wb');
+		if ($fh === false)
+			Util::traceError("Could not open $target for writing.");
+		$ch = self::initCurl($url, $timeout, $head);
+		curl_setopt($ch, CURLOPT_FILE, $fh);
+		$res = curl_exec($ch);
+		$head = self::getContents($head);
+		curl_close($ch);
+		fclose($fh);
+		if ($res === false) {
+			@unlink($target);
+			return false;
+		}
+		if (preg_match_all('#\bHTTP/\d+\.\d+ (\d+) #', $head, $out, PREG_SET_ORDER)) {
+			$code = (int) $out[count($out)-1][1];
+		} else {
+			$code = '999 ' . curl_error($ch);
+		}
+		return true;
+	}
+
+}