+<?php
+/************************************************************************
+ * Mailer v0.2.1-FINAL Start: 03/08/2011 *
+ * =================== Last change: 03/08/2011 *
+ * *
+ * -------------------------------------------------------------------- *
+ * File : http-functions.php *
+ * -------------------------------------------------------------------- *
+ * Short description : HTTP-related functions *
+ * -------------------------------------------------------------------- *
+ * Kurzbeschreibung : HTTP-relevante Funktionen *
+ * -------------------------------------------------------------------- *
+ * $Revision:: $ *
+ * $Date:: $ *
+ * $Tag:: 0.2.1-FINAL $ *
+ * $Author:: $ *
+ * -------------------------------------------------------------------- *
+ * Copyright (c) 2003 - 2009 by Roland Haeder *
+ * Copyright (c) 2009 - 2011 by Mailer Developer Team *
+ * For more information visit: http://www.mxchange.org *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the Free Software *
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
+ * MA 02110-1301 USA *
+ ************************************************************************/
+
+// Some security stuff...
+if (!defined('__SECURITY')) {
+ die();
+} // END - if
+
+// Sends out all headers required for HTTP/1.1 reply
+function sendHttpHeaders () {
+ // Used later
+ $now = gmdate('D, d M Y H:i:s') . ' GMT';
+
+ // Send HTTP header
+ sendHeader('HTTP/1.1 ' . getHttpStatus());
+
+ // General headers for no caching
+ sendHeader('Expires: ' . $now); // RFC2616 - Section 14.21
+ sendHeader('Last-Modified: ' . $now);
+ sendHeader('Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0'); // HTTP/1.1
+ sendHeader('Pragma: no-cache'); // HTTP/1.0
+ sendHeader('Connection: Close');
+ sendHeader('Content-Type: ' . getContentType() . '; charset=UTF-8');
+ sendHeader('Content-Language: ' . getLanguage());
+}
+
+// Send a GET request
+function sendGetRequest ($script, $data = array(), $removeHeader = false) {
+ // Extract hostname and port from script
+ $host = extractHostnameFromUrl($script);
+
+ // Add data
+ $body = http_build_query($data, '', '&');
+
+ // There should be data, else we don't need to extend $script with $body
+ if (!empty($body)) {
+ // Do we have a question-mark in the script?
+ if (strpos($script, '?') === false) {
+ // No, so first char must be question mark
+ $body = '?' . $body;
+ } else {
+ // Ok, add &
+ $body = '&' . $body;
+ }
+
+ // Add script data
+ $script .= $body;
+
+ // Remove trailed & to make it more conform
+ if (substr($script, -1, 1) == '&') {
+ $script = substr($script, 0, -1);
+ } // END - if
+ } // END - if
+
+ // Generate GET request header
+ $request = 'GET /' . trim($script) . ' HTTP/1.1' . getConfig('HTTP_EOL');
+ $request .= 'Host: ' . $host . getConfig('HTTP_EOL');
+ $request .= 'Referer: ' . getUrl() . '/admin.php' . getConfig('HTTP_EOL');
+ if (isConfigEntrySet('FULL_VERSION')) {
+ $request .= 'User-Agent: ' . getTitle() . '/' . getFullVersion() . getConfig('HTTP_EOL');
+ } else {
+ $request .= 'User-Agent: ' . getTitle() . '/' . getConfig('VERSION') . getConfig('HTTP_EOL');
+ }
+ $request .= 'Accept: image/png,image/*;q=0.8,text/plain,text/html,*/*;q=0.5' . getConfig('HTTP_EOL');
+ $request .= 'Accept-Charset: UTF-8,*' . getConfig('HTTP_EOL');
+ $request .= 'Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0' . getConfig('HTTP_EOL');
+ $request .= 'Connection: close' . getConfig('HTTP_EOL');
+ $request .= getConfig('HTTP_EOL');
+
+ // Send the raw request
+ $response = sendRawRequest($host, $request);
+
+ // Should we remove header lines?
+ if ($removeHeader === true) {
+ // Okay, remove them
+ $response = removeHttpHeaderFromResponse($response);
+ } // END - if
+
+ // Return the result to the caller function
+ return $response;
+}
+
+// Send a POST request
+function sendPostRequest ($script, array $postData, $removeHeader = false) {
+ // Extract host name from script
+ $host = extractHostnameFromUrl($script);
+
+ // Construct request body
+ $body = http_build_query($postData, '', '&');
+
+ // Generate POST request header
+ $request = 'POST /' . trim($script) . ' HTTP/1.0' . getConfig('HTTP_EOL');
+ $request .= 'Host: ' . $host . getConfig('HTTP_EOL');
+ $request .= 'Referer: ' . getUrl() . '/admin.php' . getConfig('HTTP_EOL');
+ $request .= 'User-Agent: ' . getTitle() . '/' . getFullVersion() . getConfig('HTTP_EOL');
+ $request .= 'Accept: text/plain;q=0.8' . getConfig('HTTP_EOL');
+ $request .= 'Accept-Charset: UTF-8,*' . getConfig('HTTP_EOL');
+ $request .= 'Cache-Control: no-cache' . getConfig('HTTP_EOL');
+ $request .= 'Content-Type: application/x-www-form-urlencoded' . getConfig('HTTP_EOL');
+ $request .= 'Content-Length: ' . strlen($body) . getConfig('HTTP_EOL');
+ $request .= 'Connection: close' . getConfig('HTTP_EOL');
+ $request .= getConfig('HTTP_EOL');
+
+ // Add body
+ $request .= $body;
+
+ // Send the raw request
+ $response = sendRawRequest($host, $request);
+
+ // Should we remove header lines?
+ if ($removeHeader === true) {
+ // Okay, remove them
+ $response = removeHttpHeaderFromResponse($response);
+ } // END - if
+
+ // Return the result to the caller function
+ return $response;
+}
+
+// Sends a raw request to another host
+function sendRawRequest ($host, $request) {
+ // Init errno and errdesc with 'all fine' values
+ $errno = '0';
+ $errdesc = '';
+
+ // Default port is 80
+ $port = 80;
+
+ // Initialize array
+ $response = array('', '', '');
+
+ // Default is not to use proxy
+ $useProxy = false;
+
+ // Default is non-broken HTTP server implementation
+ $GLOBALS['is_http_server_broken'] = false;
+
+ // Are proxy settins set?
+ if (isProxyUsed()) {
+ // Then use it
+ $useProxy = true;
+ } // END - if
+
+ // Load include
+ loadIncludeOnce('inc/classes/resolver.class.php');
+
+ // Extract port part from host
+ $portArray = explode(':', $host);
+ if (count($portArray) == 2) {
+ // Extract host and port
+ $host = $portArray[0];
+ $port = $portArray[1];
+ } elseif (count($portArray) > 2) {
+ // This should not happen!
+ debug_report_bug(__FUNCTION__, __LINE__, 'Invalid ' . $host . '. Please report this to the Mailer-Project team.');
+ }
+
+ // Get resolver instance
+ $resolver = new HostnameResolver();
+
+ // Open connection
+ //* DEBUG: */ die('SCRIPT=' . $script);
+ if ($useProxy === true) {
+ // Resolve hostname into IP address
+ $ip = $resolver->resolveHostname(compileRawCode(getProxyHost()));
+
+ // Connect to host through proxy connection
+ $fp = fsockopen($ip, bigintval(getProxyPort()), $errno, $errdesc, 30);
+ } else {
+ // Resolve hostname into IP address
+ $ip = $resolver->resolveHostname($host);
+
+ // Connect to host directly
+ $fp = fsockopen($ip, $port, $errno, $errdesc, 30);
+ }
+
+ // Is there a link?
+ if (!is_resource($fp)) {
+ // Failed!
+ logDebugMessage(__FUNCTION__, __LINE__, $errdesc . ' (' . $errno . ')');
+ return $response;
+ } elseif ((!stream_set_blocking($fp, 0)) || (!stream_set_timeout($fp, 1))) {
+ // Cannot set non-blocking mode or timeout
+ logDebugMessage(__FUNCTION__, __LINE__, socket_strerror(socket_last_error()));
+ return $response;
+ }
+
+ // Do we use proxy?
+ if ($useProxy === true) {
+ // Setup proxy tunnel
+ $response = setupProxyTunnel($host, $port, $fp);
+
+ // If the response is invalid, abort
+ if ((count($response) == 3) && (empty($response[0])) && (empty($response[1])) && (empty($response[2]))) {
+ // Invalid response!
+ logDebugMessage(__FUNCTION__, __LINE__, 'Proxy tunnel not working?');
+ return $response;
+ } // END - if
+ } // END - if
+
+ // Write request
+ fwrite($fp, $request);
+
+ // Start counting
+ $start = microtime(true);
+
+ // Read response
+ while (!feof($fp)) {
+ // Get info from stream
+ $info = stream_get_meta_data($fp);
+
+ // Is it timed out? 15 seconds is a really patient...
+ if (($info['timed_out'] == true) || (microtime(true) - $start) > 15) {
+ // Timeout
+ logDebugMessage(__FUNCTION__, __LINE__, 'Timed out to get data from host ' . $host);
+
+ // Abort here
+ break;
+ } // END - if
+
+ // Get line from stream
+ $line = fgets($fp, 128);
+
+ // Ignore empty lines because of non-blocking mode
+ if (empty($line)) {
+ // uslepp a little to avoid 100% CPU load
+ usleep(10);
+
+ // Skip this
+ continue;
+ } // END - if
+
+ // Check for broken HTTP implementations
+ if (substr(strtolower($line), 0, 7) == 'server:') {
+ // Anomic (see http://anomic.de, http://yacy.net) is currently broken
+ $GLOBALS['is_http_server_broken'] = in_array(trim(substr(strtolower($line), 7)), array('anomichttpd'));
+ } // END - if
+
+ // Add it to response
+ $response[] = $line;
+ } // END - while
+
+ // Close socket
+ fclose($fp);
+
+ // Time request if debug-mode is enabled
+ if (isDebugModeEnabled()) {
+ // Add debug message...
+ logDebugMessage(__FUNCTION__, __LINE__, 'Request took ' . (microtime(true) - $start) . ' seconds and returned ' . count($response) . ' line(s).');
+ } // END - if
+
+ // Skip first empty lines
+ $resp = $response;
+ foreach ($resp as $idx => $line) {
+ // Trim space away
+ $line = trim($line);
+
+ // Is this line empty?
+ if (empty($line)) {
+ // Then remove it
+ array_shift($response);
+ } else {
+ // Abort on first non-empty line
+ break;
+ }
+ } // END - foreach
+
+ //* DEBUG: */ debugOutput('<strong>Request:</strong><pre>'.print_r($request, true).'</pre>');
+ //* DEBUG: */ debugOutput('<strong>Response:</strong><pre>'.print_r($response, true).'</pre>');
+
+ // Proxy agent found or something went wrong?
+ if (!isset($response[0])) {
+ // No response, maybe timeout
+ $response = array('', '', '');
+ logDebugMessage(__FUNCTION__, __LINE__, 'Invalid empty response array, maybe timed out?');
+ } elseif ((substr(strtolower($response[0]), 0, 11) == 'proxy-agent') && ($useProxy === true)) {
+ // Proxy header detected, so remove two lines
+ array_shift($response);
+ array_shift($response);
+ } // END - if
+
+ // Was the request successfull?
+ if ((!isInStringIgnoreCase('200 OK', $response[0])) || (empty($response[0]))) {
+ // Not found / access forbidden
+ logDebugMessage(__FUNCTION__, __LINE__, 'Unexpected status code ' . $response[0] . ' detected. "200 OK" was expected.');
+ $response = array('', '', '');
+ } else {
+ // Check array for chuncked encoding
+ $response = unchunkHttpResponse($response);
+ } // END - if
+
+ // Return response
+ return $response;
+}
+
+// Sets up a proxy tunnel for given hostname and through resource
+function setupProxyTunnel ($host, $port, $resource) {
+ // Initialize array
+ $response = array('', '', '');
+
+ // Generate CONNECT request header
+ $proxyTunnel = 'CONNECT ' . $host . ':' . $port . ' HTTP/1.0' . getConfig('HTTP_EOL');
+ $proxyTunnel .= 'Host: ' . $host . getConfig('HTTP_EOL');
+
+ // Use login data to proxy? (username at least!)
+ if (getProxyUsername() != '') {
+ // Add it as well
+ $encodedAuth = base64_encode(compileRawCode(getProxyUsername()) . ':' . compileRawCode(getProxyPassword()));
+ $proxyTunnel .= 'Proxy-Authorization: Basic ' . $encodedAuth . getConfig('HTTP_EOL');
+ } // END - if
+
+ // Add last new-line
+ $proxyTunnel .= getConfig('HTTP_EOL');
+ //* DEBUG: */ debugOutput('<strong>proxyTunnel=</strong><pre>' . $proxyTunnel.'</pre>');
+
+ // Write request
+ fwrite($fp, $proxyTunnel);
+
+ // Got response?
+ if (feof($fp)) {
+ // No response received
+ return $response;
+ } // END - if
+
+ // Read the first line
+ $resp = trim(fgets($fp, 10240));
+ $respArray = explode(' ', $resp);
+ if ((strtolower($respArray[0]) !== 'http/1.0') || ($respArray[1] != '200')) {
+ // Invalid response!
+ return $response;
+ } // END - if
+
+ // All fine!
+ return $respArray;
+}
+
+// Check array for chuncked encoding
+function unchunkHttpResponse (array $response) {
+ // Default is not chunked
+ $isChunked = false;
+
+ // Check if we have chunks
+ foreach ($response as $line) {
+ // Make lower-case and trim it
+ $line = trim(strtolower($line));
+
+ // Entry found?
+ if ((strpos($line, 'transfer-encoding') !== false) && (strpos($line, 'chunked') !== false)) {
+ // Found!
+ $isChunked = true;
+ break;
+ } // END - if
+ } // END - foreach
+
+ // Is it chunked?
+ if ($isChunked === true) {
+ // Good, we still have the HTTP headers in there, so we need to get rid
+ // of them temporarly
+ //* DEBUG: */ die('<pre>'.htmlentities(print_r(removeHttpHeaderFromResponse($response), true)).'</pre>');
+ $tempResponse = http_chunked_decode(implode('', removeHttpHeaderFromResponse($response)));
+
+ // We got a string back from http_chunked_decode(), so we need to convert it back to an array
+ //* DEBUG: */ die('tempResponse['.strlen($tempResponse).']=<pre>'.replaceReturnNewLine(htmlentities($tempResponse)).'</pre>');
+
+ // Re-add the headers
+ $response = merge_array($GLOBALS['http_headers'], stringToArray("\n", $tempResponse));
+ } // END - if
+
+ // Return the unchunked array
+ return $response;
+}
+
+// Removes HTTP header lines from a response array (e.g. output from send<Get|Post>Request() )
+function removeHttpHeaderFromResponse (array $response) {
+ // Save headers for later usage
+ $GLOBALS['http_headers'] = array();
+
+ // The first array element has to contain HTTP
+ if ((isset($response[0])) && (substr(strtoupper($response[0]), 0, 5) == 'HTTP/')) {
+ // Okay, we have headers, now remove them with a second array
+ $response2 = $response;
+ foreach ($response as $line) {
+ // Remove line
+ array_shift($response2);
+
+ // Add full line to temporary global array
+ $GLOBALS['http_headers'][] = $line;
+
+ // Trim it for testing
+ $lineTest = trim($line);
+
+ // Is this line empty?
+ if (empty($lineTest)) {
+ // Then stop here
+ break;
+ } // END - if
+ } // END - foreach
+
+ // Write back the array
+ $response = $response2;
+ } // END - if
+
+ // Return the modified response array
+ return $response;
+}
+
+// Returns the flag if a broken HTTP server implementation was detected
+function isBrokenHttpServerImplentation () {
+ // Determine it
+ $isBroken = ((isset($GLOBALS['is_http_server_broken'])) && ($GLOBALS['is_http_server_broken'] === true));
+
+ // ... and return it
+ return $isBroken;
+}
+
+//-----------------------------------------------------------------------------
+// Automatically re-created functions, all taken from user comments on www.php.net
+//-----------------------------------------------------------------------------
+
+if (!function_exists('http_build_query')) {
+ // Taken from documentation on www.php.net, credits to Marco K. (Germany) and some light mods by R.Haeder
+ function http_build_query($data, $prefix = '', $sep = '', $key = '') {
+ $ret = array();
+ foreach ((array) $data as $k => $v) {
+ if (is_int($k) && $prefix != null) {
+ $k = urlencode($prefix . $k);
+ } // END - if
+
+ if ((!empty($key)) || ($key === 0)) {
+ $k = $key . '[' . urlencode($k) . ']';
+ } // END - if
+
+ if (is_array($v) || is_object($v)) {
+ array_push($ret, http_build_query($v, '', $sep, $k));
+ } else {
+ array_push($ret, $k.'='.urlencode($v));
+ }
+ } // END - foreach
+
+ if (empty($sep)) {
+ $sep = ini_get('arg_separator.output');
+ } // END - if
+
+ return implode($sep, $ret);
+ }
+} // END - if
+
+if (!function_exists('http_chunked_decode')) {
+ /**
+ * dechunk an HTTP 'transfer-encoding: chunked' message.
+ *
+ * @param $chunk The encoded message
+ * @return $dechunk The decoded message. If $chunk wasn't encoded properly debug_report_bug() is being called
+ * @author Marques Johansson
+ * @link http://php.net/manual/en/function.http-chunked-decode.php#89786
+ */
+ function http_chunked_decode ($chunk) {
+ // Detect multi-byte encoding
+ $mbPrefix = detectMultiBytePrefix($chunk);
+ //* DEBUG: */ print 'mbPrefix=' . $mbPrefix . '<br />';
+
+ // Init some variables
+ $offset = 0;
+ $len = call_user_func_array($mbPrefix . 'strlen', array(($chunk)));
+ $dechunk = '';
+
+ // Walk through all chunks
+ while ($offset < $len) {
+ // Where does the \r\n begin?
+ $lineEndAt = call_user_func_array($mbPrefix . 'strpos', array($chunk, getConfig('HTTP_EOL'), $offset));
+
+ /* DEBUG: *
+ print 'lineEndAt[<em>'.__LINE__.'</em>]='.$lineEndAt.'<br />
+offset[<em>'.__LINE__.'</em>]='.$offset.'<br />
+len='.$len.'<br />
+next[offset,10]=<pre>'.replaceReturnNewLine(htmlentities(call_user_func_array($mbPrefix . 'substr', array($chunk, $offset, 10)))).'</pre>';
+ /* DEBUG: */
+
+ // Get next hex-coded chunk length
+ $chunkLenHex = call_user_func_array($mbPrefix . 'substr', array($chunk, $offset, ($lineEndAt - $offset)));
+
+ /* DEBUG: *
+ print 'chunkLenHex[<em>'.__LINE__.'</em>]='.replaceReturnNewLine(htmlentities($chunkLenHex)).'<br />
+';
+ /* DEBUG: */
+
+ // Validation if it is hexadecimal
+ if (!isHexadecimal($chunkLenHex)) {
+ // Please help debugging this
+ //* DEBUG: */ die('ABORT:chunkLenHex=<pre>'.replaceReturnNewLine(htmlentities($chunkLenHex)).'</pre>');
+ debug_report_bug(__FUNCTION__, __LINE__, 'Value ' . $chunkLenHex . ' is no valid hexa-decimal string.');
+
+ // This won't be reached
+ return $chunk;
+ } // END - if
+
+ // Position of next chunk is right after \r\n
+ $offset = $offset + strlen($chunkLenHex) + strlen(getConfig('HTTP_EOL'));
+ $chunkLen = hexdec(rtrim($chunkLenHex, getConfig('HTTP_EOL')));
+
+ /* DEBUG: *
+ print 'chunkLen='.$chunkLen.'<br />
+offset[<em>'.__LINE__.'</em>]='.$offset.'<br />';
+ /* DEBUG: */
+
+ // Moved out for debugging
+ $next = call_user_func_array($mbPrefix . 'substr', array($chunk, $offset, $chunkLen));
+ //* DEBUG: */ print 'next=<pre>'.replaceReturnNewLine(htmlentities($next)).'</pre>';
+
+ /*
+ * Hack for e.g. YaCy HTTPDaemon (Anomic Server), this HTTP server
+ * is currently (revision 7567) broken and does not include the \r\n
+ * characters when it does sent "chunked" messages.
+ */
+ $count = 0;
+ if (isBrokenHttpServerImplentation()) {
+ // Count occurrences of \r\n
+ $count = call_user_func_array($mbPrefix . 'substr_count', array($next, getConfig('HTTP_EOL')));
+ } // END - if
+
+ // Correct it because we need to subtract occurrences of \r\n
+ $chunkLen = hexdec(rtrim($chunkLenHex, getConfig('HTTP_EOL'))) - ($count * strlen(getConfig('HTTP_EOL')));
+
+ // Add next chunk to $dechunk
+ $dechunk .= call_user_func_array($mbPrefix . 'substr', array($chunk, $offset, $chunkLen));
+
+ /* DEBUG: *
+ print('offset[<em>'.__LINE__.'</em>]='.$offset.'<br />
+lineEndAt[<em>'.__LINE__.'</em>]='.$lineEndAt.'<br />
+len='.$len.'<br />
+count='.$count.'<br />
+chunkLen='.$chunkLen.'<br />
+chunkLenHex='.$chunkLenHex.'<br />
+dechunk=<pre>'.replaceReturnNewLine(htmlentities($dechunk)).'</pre>
+chunk=<pre>'.replaceReturnNewLine(htmlentities($chunk)).'</pre>');
+ /* DEBUG: */
+
+ // Is $offset + $chunkLen larger than or equal $len?
+ if (($offset + $chunkLen) >= $len) {
+ // Then stop processing here
+ break;
+ } // END - if
+
+ // Calculate next offset of chunk
+ $offset = call_user_func_array($mbPrefix . 'strpos', array($chunk, getConfig('HTTP_EOL'), $offset + $chunkLen)) + 2;
+
+ /* DEBUG: *
+ print('offset[<em>'.__LINE__.'</em>]='.$offset.'<br />
+next[100]=<pre>'.replaceReturnNewLine(htmlentities(call_user_func_array($mbPrefix . 'substr', array($chunk, $offset, 100)))).'</pre>
+---:---:---:---:---:---:---:---:---<br />
+');
+ /* DEBUG: */
+ } // END - while
+
+ // Return de-chunked string
+ return $dechunk;
+ }
+} // END - if
+
+// [EOF]
+?>