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-rw-r--r--core/Http.php385
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diff --git a/core/Http.php b/core/Http.php
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-<?php
-/**
- * Piwik - Open source web analytics
- *
- * @link http://piwik.org
- * @license http://www.gnu.org/licenses/gpl-3.0.html Gpl v3 or later
- * @version $Id$
- *
- * @category Piwik
- * @package Piwik
- */
-
-/**
- * Server-side http client to retrieve content from remote servers, and optionally save to a local file.
- * Used to check for the latest Piwik version and download updates.
- *
- * @package Piwik
- */
-class Piwik_Http
-{
- /**
- * Get "best" available transport method for sendHttpRequest() calls.
- *
- * @return string
- */
- static public function getTransportMethod()
- {
- $method = 'curl';
- if(!extension_loaded('curl'))
- {
- $method = 'stream';
- if(@ini_get('allow_url_fopen') != '1')
- {
- $method = 'socket';
- if(!function_exists('fsockopen'))
- {
- return null;
- }
- }
- }
- return $method;
- }
-
- /**
- * Sends http request ensuring the request will fail before $timeout seconds
- *
- * If no $destinationPath is specified, the trimmed response (without header) is returned as a string.
- * If a $destinationPath is specified, the response (without header) is saved to a file.
- *
- * @param string $aUrl
- * @param int $timeout
- * @param string $userAgent
- * @param string $destinationPath
- * @param int $followDepth
- * @return bool true (or string) on success; false on HTTP response error code (1xx or 4xx)
- * @throws Exception for all other errors
- */
- static public function sendHttpRequest($aUrl, $timeout, $userAgent = null, $destinationPath = null, $followDepth = 0)
- {
- // create output file
- $file = null;
- if($destinationPath)
- {
- if (($file = @fopen($destinationPath, 'wb')) === false || !is_resource($file))
- {
- throw new Exception('Error while creating the file: ' . $destinationPath);
- }
- }
-
- return self::sendHttpRequestBy(self::getTransportMethod(), $aUrl, $timeout, $userAgent, $destinationPath, $file, $followDepth);
- }
-
- /**
- * Sends http request using the specified transport method
- *
- * @param string $method
- * @param string $aUrl
- * @param int $timeout
- * @param string $userAgent
- * @param string $destinationPath
- * @param resource $file
- * @param int $followDepth
- * @return bool true (or string) on success; false on HTTP response error code (1xx or 4xx)
- * @throws Exception for all other errors
- */
- static public function sendHttpRequestBy($method = 'socket', $aUrl, $timeout, $userAgent = null, $destinationPath = null, $file = null, $followDepth = 0)
- {
- if ($followDepth > 5)
- {
- throw new Exception('Too many redirects ('.$followDepth.')');
- }
-
- $contentLength = 0;
- $fileLength = 0;
-
- if($method == 'socket')
- {
- // initialization
- $url = @parse_url($aUrl);
- if($url === false || !isset($url['scheme']))
- {
- throw new Exception('Malformed URL: '.$aUrl);
- }
-
- if($url['scheme'] != 'http')
- {
- throw new Exception('Invalid protocol/scheme: '.$url['scheme']);
- }
- $host = $url['host'];
- $port = isset($url['port)']) ? $url['port'] : 80;
- $path = isset($url['path']) ? $url['path'] : '/';
- if(isset($url['query']))
- {
- $path .= '?'.$url['query'];
- }
- $errno = null;
- $errstr = null;
-
- // connection attempt
- if (($fsock = @fsockopen($host, $port, $errno, $errstr, $timeout)) === false || !is_resource($fsock))
- {
- if(is_resource($file)) { @fclose($file); }
- throw new Exception("Error while connecting to: $host. Please try again later. $errstr");
- }
-
- // send HTTP request header
- fwrite($fsock,
- "GET $path HTTP/1.0\r\n"
- ."Host: $host".($port != 80 ? ':'.$port : '')."\r\n"
- ."User-Agent: Piwik/".Piwik_Version::VERSION.($userAgent ? " $userAgent" : '')."\r\n"
- .'Referer: http://'.Piwik_Common::getIpString()."/\r\n"
- ."Connection: close\r\n"
- ."\r\n"
- );
-
- $streamMetaData = array('timed_out' => false);
- @stream_set_blocking($fsock, true);
- @stream_set_timeout($fsock, $timeout);
-
- // process header
- $status = null;
- $expectRedirect = false;
-
- while(!feof($fsock))
- {
- $line = fgets($fsock, 4096);
-
- $streamMetaData = @stream_get_meta_data($fsock);
- if($streamMetaData['timed_out'])
- {
- if(is_resource($file)) { @fclose($file); }
- @fclose($fsock);
- throw new Exception('Timed out waiting for server response');
- }
-
- // a blank line marks the end of the server response header
- if(rtrim($line, "\r\n") == '')
- {
- break;
- }
-
- // parse first line of server response header
- if(!$status)
- {
- // expect first line to be HTTP response status line, e.g., HTTP/1.1 200 OK
- if(!preg_match('~^HTTP/(\d\.\d)\s+(\d+)(\s*.*)?~', $line, $m))
- {
- if(is_resource($file)) { @fclose($file); }
- @fclose($fsock);
- throw new Exception('Expected server response code. Got '.rtrim($line, "\r\n"));
- }
-
- $status = (integer) $m[2];
-
- // Informational 1xx or Client Error 4xx
- if ($status < 200 || $status >= 400)
- {
- if(is_resource($file)) { @fclose($file); }
- @fclose($fsock);
- return false;
- }
-
- continue;
- }
-
- // handle redirect
- if(preg_match('/^Location:\s*(.+)/', rtrim($line, "\r\n"), $m))
- {
- if(is_resource($file)) { @fclose($file); }
- @fclose($fsock);
- // Successful 2xx vs Redirect 3xx
- if($status < 300)
- {
- throw new Exception('Unexpected redirect to Location: '.rtrim($line).' for status code '.$status);
- }
- return self::sendHttpRequestBy($method, trim($m[1]), $timeout, $userAgent, $pathDestination, $file, $followDepth+1);
- }
-
- // save expected content length for later verification
- if(preg_match('/^Content-Length:\s*(\d+)/', $line, $m))
- {
- $contentLength = (integer) $m[1];
- }
- }
-
- if(feof($fsock))
- {
- throw new Exception('Unexpected end of transmission');
- }
-
- // process content/body
- $response = '';
-
- while(!feof($fsock))
- {
- $line = fread($fsock, 8192);
-
- $streamMetaData = @stream_get_meta_data($fsock);
- if($streamMetaData['timed_out'])
- {
- if(is_resource($file)) { @fclose($file); }
- @fclose($fsock);
- throw new Exception('Timed out waiting for server response');
- }
-
- $fileLength += strlen($line);
-
- if(is_resource($file))
- {
- // save to file
- fwrite($file, $line);
- }
- else
- {
- // concatenate to response string
- $response .= $line;
- }
- }
-
- // determine success or failure
- @fclose(@$fsock);
- }
- else if($method == 'stream')
- {
- $response = false;
-
- // we make sure the request takes less than a few seconds to fail
- // we create a stream_context (works in php >= 5.2.1)
- // we also set the socket_timeout (for php < 5.2.1)
- $default_socket_timeout = @ini_get('default_socket_timeout');
- @ini_set('default_socket_timeout', $timeout);
-
- $ctx = null;
- if(function_exists('stream_context_create')) {
- $stream_options = array(
- 'http' => array(
- 'header' => 'User-Agent: Piwik/'.Piwik_Version::VERSION.($userAgent ? " $userAgent" : '')."\r\n"
- .'Referer: http://'.Piwik_Common::getIpString()."/\r\n",
- 'max_redirects' => 5, // PHP 5.1.0
- 'timeout' => $timeout, // PHP 5.2.1
- )
- );
- $ctx = stream_context_create($stream_options);
- }
-
- $response = @file_get_contents($aUrl, 0, $ctx);
- $fileLength = strlen($response);
-
- if(is_resource($file))
- {
- // save to file
- fwrite($file, $response);
- }
-
- // restore the socket_timeout value
- if(!empty($default_socket_timeout))
- {
- @ini_set('default_socket_timeout', $default_socket_timeout);
- }
- }
- else if($method == 'curl')
- {
- $ch = @curl_init();
-
- $curl_options = array(
- // internal to ext/curl
- CURLOPT_BINARYTRANSFER => is_resource($file),
-
- // curl options (sorted oldest to newest)
- CURLOPT_URL => $aUrl,
- CURLOPT_REFERER => 'http://'.Piwik_Common::getIpString(),
- CURLOPT_USERAGENT => 'Piwik/'.Piwik_Version::VERSION.($userAgent ? " $userAgent" : ''),
- CURLOPT_HEADER => false,
- CURLOPT_CONNECTTIMEOUT => $timeout,
- );
- @curl_setopt_array($ch, $curl_options);
-
- /*
- * as of php 5.2.0, CURLOPT_FOLLOWLOCATION can't be set if
- * in safe_mode or open_basedir is set
- */
- if((string)ini_get('safe_mode') == '' && ini_get('open_basedir') == '')
- {
- $curl_options = array(
- // curl options (sorted oldest to newest)
- CURLOPT_FOLLOWLOCATION => true,
- CURLOPT_MAXREDIRS => 5,
- );
- @curl_setopt_array($ch, $curl_options);
- }
-
- if(is_resource($file))
- {
- // write output directly to file
- @curl_setopt($ch, CURLOPT_FILE, $file);
- }
- else
- {
- // internal to ext/curl
- @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
- }
-
- ob_start();
- $response = @curl_exec($ch);
- ob_end_clean();
-
- if($response === true)
- {
- $response = '';
- }
- else if($response === false)
- {
- $errstr = curl_error($ch);
- if($errstr != '')
- {
- throw new Exception('curl_exec: '.$errstr);
- }
- $response = '';
- }
-
- $contentLength = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
- $fileLength = is_resource($file) ? curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD) : strlen($response);
-
- @curl_close($ch);
- unset($ch);
- }
- else
- {
- throw new Exception('Invalid request method: '.$method);
- }
-
- if(is_resource($file))
- {
- fflush($file);
- @fclose($file);
-
- $fileSize = filesize($destinationPath);
- if((($contentLength > 0) && ($fileLength != $contentLength)) || ($fileSize != $fileLength))
- {
- throw new Exception('File size error: '.$destinationPath.'; expected '.$contentLength.' bytes; received '.$fileLength.' bytes; saved '.$fileSize.' bytes to file');
- }
- return true;
- }
-
- if(($contentLength > 0) && ($fileLength != $contentLength))
- {
- throw new Exception('Content length error: expected '.$contentLength.' bytes; received '.$fileLength.' bytes');
- }
- return trim($response);
- }
-
- /**
- * Fetch the file at $url in the destination $pathDestination
- * @param string $url
- * @param string $pathDestination
- * @param int $tries
- * @return true on success, throws Exception on failure
- */
- static public function fetchRemoteFile($url, $pathDestination, $tries = 0)
- {
- @ignore_user_abort(true);
- Piwik::setMaxExecutionTime(0);
- return self::sendHttpRequest($url, 10, 'Update', $pathDestination, $tries);
- }
-}
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