Split HttpFunctions.php into separate files
authorKunal Mehta <legoktm@member.fsf.org>
Sun, 2 Oct 2016 05:46:07 +0000 (22:46 -0700)
committerKunal Mehta <legoktm@member.fsf.org>
Sun, 2 Oct 2016 05:46:07 +0000 (22:46 -0700)
Change-Id: I30d5f77de08e42ec43baf5722f40d9205c4bde67

autoload.php
includes/HttpFunctions.php [deleted file]
includes/http/CurlHttpRequest.php [new file with mode: 0644]
includes/http/Http.php [new file with mode: 0644]
includes/http/MWHttpRequest.php [new file with mode: 0644]
includes/http/PhpHttpRequest.php [new file with mode: 0644]

index 8d9a80f..41875de 100644 (file)
@@ -298,7 +298,7 @@ $wgAutoloadLocalClasses = [
        'CssContent' => __DIR__ . '/includes/content/CssContent.php',
        'CssContentHandler' => __DIR__ . '/includes/content/CssContentHandler.php',
        'CsvStatsOutput' => __DIR__ . '/maintenance/language/StatOutputs.php',
-       'CurlHttpRequest' => __DIR__ . '/includes/HttpFunctions.php',
+       'CurlHttpRequest' => __DIR__ . '/includes/http/CurlHttpRequest.php',
        'DBAccessBase' => __DIR__ . '/includes/dao/DBAccessBase.php',
        'DBAccessError' => __DIR__ . '/includes/libs/rdbms/exception/DBAccessError.php',
        'DBAccessObjectUtils' => __DIR__ . '/includes/dao/DBAccessObjectUtils.php',
@@ -576,7 +576,7 @@ $wgAutoloadLocalClasses = [
        'Html' => __DIR__ . '/includes/Html.php',
        'HtmlArmor' => __DIR__ . '/includes/libs/HtmlArmor.php',
        'HtmlFormatter' => __DIR__ . '/includes/HtmlFormatter.php',
-       'Http' => __DIR__ . '/includes/HttpFunctions.php',
+       'Http' => __DIR__ . '/includes/http/Http.php',
        'HttpError' => __DIR__ . '/includes/exception/HttpError.php',
        'HttpStatus' => __DIR__ . '/includes/libs/HttpStatus.php',
        'IApiMessage' => __DIR__ . '/includes/api/ApiMessage.php',
@@ -780,7 +780,7 @@ $wgAutoloadLocalClasses = [
        'MWExceptionRenderer' => __DIR__ . '/includes/exception/MWExceptionRenderer.php',
        'MWFileProps' => __DIR__ . '/includes/utils/MWFileProps.php',
        'MWGrants' => __DIR__ . '/includes/utils/MWGrants.php',
-       'MWHttpRequest' => __DIR__ . '/includes/HttpFunctions.php',
+       'MWHttpRequest' => __DIR__ . '/includes/http/MWHttpRequest.php',
        'MWLBFactory' => __DIR__ . '/includes/db/MWLBFactory.php',
        'MWMemcached' => __DIR__ . '/includes/compat/MemcachedClientCompat.php',
        'MWMessagePack' => __DIR__ . '/includes/libs/MWMessagePack.php',
@@ -1057,7 +1057,7 @@ $wgAutoloadLocalClasses = [
        'Pbkdf2Password' => __DIR__ . '/includes/password/Pbkdf2Password.php',
        'PerRowAugmentor' => __DIR__ . '/includes/search/PerRowAugmentor.php',
        'PermissionsError' => __DIR__ . '/includes/exception/PermissionsError.php',
-       'PhpHttpRequest' => __DIR__ . '/includes/HttpFunctions.php',
+       'PhpHttpRequest' => __DIR__ . '/includes/http/PhpHttpRequest.php',
        'PhpXmlBugTester' => __DIR__ . '/includes/installer/PhpBugTests.php',
        'Pingback' => __DIR__ . '/includes/Pingback.php',
        'PoolCounter' => __DIR__ . '/includes/poolcounter/PoolCounter.php',
diff --git a/includes/HttpFunctions.php b/includes/HttpFunctions.php
deleted file mode 100644 (file)
index 2ca5e1b..0000000
+++ /dev/null
@@ -1,1122 +0,0 @@
-<?php
-/**
- * Various HTTP related functions.
- *
- * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- * @ingroup HTTP
- */
-
-/**
- * @defgroup HTTP HTTP
- */
-
-use MediaWiki\Logger\LoggerFactory;
-
-/**
- * Various HTTP related functions
- * @ingroup HTTP
- */
-class Http {
-       static public $httpEngine = false;
-
-       /**
-        * Perform an HTTP request
-        *
-        * @param string $method HTTP method. Usually GET/POST
-        * @param string $url Full URL to act on. If protocol-relative, will be expanded to an http:// URL
-        * @param array $options Options to pass to MWHttpRequest object.
-        *      Possible keys for the array:
-        *    - timeout             Timeout length in seconds
-        *    - connectTimeout      Timeout for connection, in seconds (curl only)
-        *    - postData            An array of key-value pairs or a url-encoded form data
-        *    - proxy               The proxy to use.
-        *                          Otherwise it will use $wgHTTPProxy (if set)
-        *                          Otherwise it will use the environment variable "http_proxy" (if set)
-        *    - noProxy             Don't use any proxy at all. Takes precedence over proxy value(s).
-        *    - sslVerifyHost       Verify hostname against certificate
-        *    - sslVerifyCert       Verify SSL certificate
-        *    - caInfo              Provide CA information
-        *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
-        *    - followRedirects     Whether to follow redirects (defaults to false).
-        *                                  Note: this should only be used when the target URL is trusted,
-        *                                  to avoid attacks on intranet services accessible by HTTP.
-        *    - userAgent           A user agent, if you want to override the default
-        *                          MediaWiki/$wgVersion
-        * @param string $caller The method making this request, for profiling
-        * @return string|bool (bool)false on failure or a string on success
-        */
-       public static function request( $method, $url, $options = [], $caller = __METHOD__ ) {
-               wfDebug( "HTTP: $method: $url\n" );
-
-               $options['method'] = strtoupper( $method );
-
-               if ( !isset( $options['timeout'] ) ) {
-                       $options['timeout'] = 'default';
-               }
-               if ( !isset( $options['connectTimeout'] ) ) {
-                       $options['connectTimeout'] = 'default';
-               }
-
-               $req = MWHttpRequest::factory( $url, $options, $caller );
-               $status = $req->execute();
-
-               if ( $status->isOK() ) {
-                       return $req->getContent();
-               } else {
-                       $errors = $status->getErrorsByType( 'error' );
-                       $logger = LoggerFactory::getInstance( 'http' );
-                       $logger->warning( $status->getWikiText( false, false, 'en' ),
-                               [ 'error' => $errors, 'caller' => $caller, 'content' => $req->getContent() ] );
-                       return false;
-               }
-       }
-
-       /**
-        * Simple wrapper for Http::request( 'GET' )
-        * @see Http::request()
-        * @since 1.25 Second parameter $timeout removed. Second parameter
-        * is now $options which can be given a 'timeout'
-        *
-        * @param string $url
-        * @param array $options
-        * @param string $caller The method making this request, for profiling
-        * @return string|bool false on error
-        */
-       public static function get( $url, $options = [], $caller = __METHOD__ ) {
-               $args = func_get_args();
-               if ( isset( $args[1] ) && ( is_string( $args[1] ) || is_numeric( $args[1] ) ) ) {
-                       // Second was used to be the timeout
-                       // And third parameter used to be $options
-                       wfWarn( "Second parameter should not be a timeout.", 2 );
-                       $options = isset( $args[2] ) && is_array( $args[2] ) ?
-                               $args[2] : [];
-                       $options['timeout'] = $args[1];
-                       $caller = __METHOD__;
-               }
-               return Http::request( 'GET', $url, $options, $caller );
-       }
-
-       /**
-        * Simple wrapper for Http::request( 'POST' )
-        * @see Http::request()
-        *
-        * @param string $url
-        * @param array $options
-        * @param string $caller The method making this request, for profiling
-        * @return string|bool false on error
-        */
-       public static function post( $url, $options = [], $caller = __METHOD__ ) {
-               return Http::request( 'POST', $url, $options, $caller );
-       }
-
-       /**
-        * A standard user-agent we can use for external requests.
-        * @return string
-        */
-       public static function userAgent() {
-               global $wgVersion;
-               return "MediaWiki/$wgVersion";
-       }
-
-       /**
-        * Checks that the given URI is a valid one. Hardcoding the
-        * protocols, because we only want protocols that both cURL
-        * and php support.
-        *
-        * file:// should not be allowed here for security purpose (r67684)
-        *
-        * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
-        *
-        * @param string $uri URI to check for validity
-        * @return bool
-        */
-       public static function isValidURI( $uri ) {
-               return preg_match(
-                       '/^https?:\/\/[^\/\s]\S*$/D',
-                       $uri
-               );
-       }
-
-       /**
-        * Gets the relevant proxy from $wgHTTPProxy
-        *
-        * @return mixed The proxy address or an empty string if not set.
-        */
-       public static function getProxy() {
-               global $wgHTTPProxy;
-
-               if ( $wgHTTPProxy ) {
-                       return $wgHTTPProxy;
-               }
-
-               return "";
-       }
-}
-
-/**
- * This wrapper class will call out to curl (if available) or fallback
- * to regular PHP if necessary for handling internal HTTP requests.
- *
- * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
- * PHP's HTTP extension.
- */
-class MWHttpRequest {
-       const SUPPORTS_FILE_POSTS = false;
-
-       protected $content;
-       protected $timeout = 'default';
-       protected $headersOnly = null;
-       protected $postData = null;
-       protected $proxy = null;
-       protected $noProxy = false;
-       protected $sslVerifyHost = true;
-       protected $sslVerifyCert = true;
-       protected $caInfo = null;
-       protected $method = "GET";
-       protected $reqHeaders = [];
-       protected $url;
-       protected $parsedUrl;
-       protected $callback;
-       protected $maxRedirects = 5;
-       protected $followRedirects = false;
-
-       /**
-        * @var CookieJar
-        */
-       protected $cookieJar;
-
-       protected $headerList = [];
-       protected $respVersion = "0.9";
-       protected $respStatus = "200 Ok";
-       protected $respHeaders = [];
-
-       public $status;
-
-       /**
-        * @var Profiler
-        */
-       protected $profiler;
-
-       /**
-        * @var string
-        */
-       protected $profileName;
-
-       /**
-        * @param string $url Url to use. If protocol-relative, will be expanded to an http:// URL
-        * @param array $options (optional) extra params to pass (see Http::request())
-        * @param string $caller The method making this request, for profiling
-        * @param Profiler $profiler An instance of the profiler for profiling, or null
-        */
-       protected function __construct(
-               $url, $options = [], $caller = __METHOD__, $profiler = null
-       ) {
-               global $wgHTTPTimeout, $wgHTTPConnectTimeout;
-
-               $this->url = wfExpandUrl( $url, PROTO_HTTP );
-               $this->parsedUrl = wfParseUrl( $this->url );
-
-               if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
-                       $this->status = Status::newFatal( 'http-invalid-url', $url );
-               } else {
-                       $this->status = Status::newGood( 100 ); // continue
-               }
-
-               if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
-                       $this->timeout = $options['timeout'];
-               } else {
-                       $this->timeout = $wgHTTPTimeout;
-               }
-               if ( isset( $options['connectTimeout'] ) && $options['connectTimeout'] != 'default' ) {
-                       $this->connectTimeout = $options['connectTimeout'];
-               } else {
-                       $this->connectTimeout = $wgHTTPConnectTimeout;
-               }
-               if ( isset( $options['userAgent'] ) ) {
-                       $this->setUserAgent( $options['userAgent'] );
-               }
-
-               $members = [ "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
-                               "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" ];
-
-               foreach ( $members as $o ) {
-                       if ( isset( $options[$o] ) ) {
-                               // ensure that MWHttpRequest::method is always
-                               // uppercased. Bug 36137
-                               if ( $o == 'method' ) {
-                                       $options[$o] = strtoupper( $options[$o] );
-                               }
-                               $this->$o = $options[$o];
-                       }
-               }
-
-               if ( $this->noProxy ) {
-                       $this->proxy = ''; // noProxy takes precedence
-               }
-
-               // Profile based on what's calling us
-               $this->profiler = $profiler;
-               $this->profileName = $caller;
-       }
-
-       /**
-        * Simple function to test if we can make any sort of requests at all, using
-        * cURL or fopen()
-        * @return bool
-        */
-       public static function canMakeRequests() {
-               return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
-       }
-
-       /**
-        * Generate a new request object
-        * @param string $url Url to use
-        * @param array $options (optional) extra params to pass (see Http::request())
-        * @param string $caller The method making this request, for profiling
-        * @throws MWException
-        * @return CurlHttpRequest|PhpHttpRequest
-        * @see MWHttpRequest::__construct
-        */
-       public static function factory( $url, $options = null, $caller = __METHOD__ ) {
-               if ( !Http::$httpEngine ) {
-                       Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
-               } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
-                       throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
-                               ' Http::$httpEngine is set to "curl"' );
-               }
-
-               switch ( Http::$httpEngine ) {
-                       case 'curl':
-                               return new CurlHttpRequest( $url, $options, $caller, Profiler::instance() );
-                       case 'php':
-                               if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
-                                       throw new MWException( __METHOD__ . ': allow_url_fopen ' .
-                                               'needs to be enabled for pure PHP http requests to ' .
-                                               'work. If possible, curl should be used instead. See ' .
-                                               'http://php.net/curl.'
-                                       );
-                               }
-                               return new PhpHttpRequest( $url, $options, $caller, Profiler::instance() );
-                       default:
-                               throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
-               }
-       }
-
-       /**
-        * Get the body, or content, of the response to the request
-        *
-        * @return string
-        */
-       public function getContent() {
-               return $this->content;
-       }
-
-       /**
-        * Set the parameters of the request
-        *
-        * @param array $args
-        * @todo overload the args param
-        */
-       public function setData( $args ) {
-               $this->postData = $args;
-       }
-
-       /**
-        * Take care of setting up the proxy (do nothing if "noProxy" is set)
-        *
-        * @return void
-        */
-       public function proxySetup() {
-               // If there is an explicit proxy set and proxies are not disabled, then use it
-               if ( $this->proxy && !$this->noProxy ) {
-                       return;
-               }
-
-               // Otherwise, fallback to $wgHTTPProxy if this is not a machine
-               // local URL and proxies are not disabled
-               if ( self::isLocalURL( $this->url ) || $this->noProxy ) {
-                       $this->proxy = '';
-               } else {
-                       $this->proxy = Http::getProxy();
-               }
-       }
-
-       /**
-        * Check if the URL can be served by localhost
-        *
-        * @param string $url Full url to check
-        * @return bool
-        */
-       private static function isLocalURL( $url ) {
-               global $wgCommandLineMode, $wgLocalVirtualHosts;
-
-               if ( $wgCommandLineMode ) {
-                       return false;
-               }
-
-               // Extract host part
-               $matches = [];
-               if ( preg_match( '!^https?://([\w.-]+)[/:].*$!', $url, $matches ) ) {
-                       $host = $matches[1];
-                       // Split up dotwise
-                       $domainParts = explode( '.', $host );
-                       // Check if this domain or any superdomain is listed as a local virtual host
-                       $domainParts = array_reverse( $domainParts );
-
-                       $domain = '';
-                       $countParts = count( $domainParts );
-                       for ( $i = 0; $i < $countParts; $i++ ) {
-                               $domainPart = $domainParts[$i];
-                               if ( $i == 0 ) {
-                                       $domain = $domainPart;
-                               } else {
-                                       $domain = $domainPart . '.' . $domain;
-                               }
-
-                               if ( in_array( $domain, $wgLocalVirtualHosts ) ) {
-                                       return true;
-                               }
-                       }
-               }
-
-               return false;
-       }
-
-       /**
-        * Set the user agent
-        * @param string $UA
-        */
-       public function setUserAgent( $UA ) {
-               $this->setHeader( 'User-Agent', $UA );
-       }
-
-       /**
-        * Set an arbitrary header
-        * @param string $name
-        * @param string $value
-        */
-       public function setHeader( $name, $value ) {
-               // I feel like I should normalize the case here...
-               $this->reqHeaders[$name] = $value;
-       }
-
-       /**
-        * Get an array of the headers
-        * @return array
-        */
-       public function getHeaderList() {
-               $list = [];
-
-               if ( $this->cookieJar ) {
-                       $this->reqHeaders['Cookie'] =
-                               $this->cookieJar->serializeToHttpRequest(
-                                       $this->parsedUrl['path'],
-                                       $this->parsedUrl['host']
-                               );
-               }
-
-               foreach ( $this->reqHeaders as $name => $value ) {
-                       $list[] = "$name: $value";
-               }
-
-               return $list;
-       }
-
-       /**
-        * Set a read callback to accept data read from the HTTP request.
-        * By default, data is appended to an internal buffer which can be
-        * retrieved through $req->getContent().
-        *
-        * To handle data as it comes in -- especially for large files that
-        * would not fit in memory -- you can instead set your own callback,
-        * in the form function($resource, $buffer) where the first parameter
-        * is the low-level resource being read (implementation specific),
-        * and the second parameter is the data buffer.
-        *
-        * You MUST return the number of bytes handled in the buffer; if fewer
-        * bytes are reported handled than were passed to you, the HTTP fetch
-        * will be aborted.
-        *
-        * @param callable $callback
-        * @throws MWException
-        */
-       public function setCallback( $callback ) {
-               if ( !is_callable( $callback ) ) {
-                       throw new MWException( 'Invalid MwHttpRequest callback' );
-               }
-               $this->callback = $callback;
-       }
-
-       /**
-        * A generic callback to read the body of the response from a remote
-        * server.
-        *
-        * @param resource $fh
-        * @param string $content
-        * @return int
-        */
-       public function read( $fh, $content ) {
-               $this->content .= $content;
-               return strlen( $content );
-       }
-
-       /**
-        * Take care of whatever is necessary to perform the URI request.
-        *
-        * @return Status
-        */
-       public function execute() {
-
-               $this->content = "";
-
-               if ( strtoupper( $this->method ) == "HEAD" ) {
-                       $this->headersOnly = true;
-               }
-
-               $this->proxySetup(); // set up any proxy as needed
-
-               if ( !$this->callback ) {
-                       $this->setCallback( [ $this, 'read' ] );
-               }
-
-               if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
-                       $this->setUserAgent( Http::userAgent() );
-               }
-
-       }
-
-       /**
-        * Parses the headers, including the HTTP status code and any
-        * Set-Cookie headers.  This function expects the headers to be
-        * found in an array in the member variable headerList.
-        */
-       protected function parseHeader() {
-
-               $lastname = "";
-
-               foreach ( $this->headerList as $header ) {
-                       if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
-                               $this->respVersion = $match[1];
-                               $this->respStatus = $match[2];
-                       } elseif ( preg_match( "#^[ \t]#", $header ) ) {
-                               $last = count( $this->respHeaders[$lastname] ) - 1;
-                               $this->respHeaders[$lastname][$last] .= "\r\n$header";
-                       } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
-                               $this->respHeaders[strtolower( $match[1] )][] = $match[2];
-                               $lastname = strtolower( $match[1] );
-                       }
-               }
-
-               $this->parseCookies();
-
-       }
-
-       /**
-        * Sets HTTPRequest status member to a fatal value with the error
-        * message if the returned integer value of the status code was
-        * not successful (< 300) or a redirect (>=300 and < 400).  (see
-        * RFC2616, section 10,
-        * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
-        * list of status codes.)
-        */
-       protected function setStatus() {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               if ( (int)$this->respStatus > 399 ) {
-                       list( $code, $message ) = explode( " ", $this->respStatus, 2 );
-                       $this->status->fatal( "http-bad-status", $code, $message );
-               }
-       }
-
-       /**
-        * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
-        * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
-        * for a list of status codes.)
-        *
-        * @return int
-        */
-       public function getStatus() {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               return (int)$this->respStatus;
-       }
-
-       /**
-        * Returns true if the last status code was a redirect.
-        *
-        * @return bool
-        */
-       public function isRedirect() {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               $status = (int)$this->respStatus;
-
-               if ( $status >= 300 && $status <= 303 ) {
-                       return true;
-               }
-
-               return false;
-       }
-
-       /**
-        * Returns an associative array of response headers after the
-        * request has been executed.  Because some headers
-        * (e.g. Set-Cookie) can appear more than once the, each value of
-        * the associative array is an array of the values given.
-        *
-        * @return array
-        */
-       public function getResponseHeaders() {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               return $this->respHeaders;
-       }
-
-       /**
-        * Returns the value of the given response header.
-        *
-        * @param string $header
-        * @return string|null
-        */
-       public function getResponseHeader( $header ) {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               if ( isset( $this->respHeaders[strtolower( $header )] ) ) {
-                       $v = $this->respHeaders[strtolower( $header )];
-                       return $v[count( $v ) - 1];
-               }
-
-               return null;
-       }
-
-       /**
-        * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
-        *
-        * @param CookieJar $jar
-        */
-       public function setCookieJar( $jar ) {
-               $this->cookieJar = $jar;
-       }
-
-       /**
-        * Returns the cookie jar in use.
-        *
-        * @return CookieJar
-        */
-       public function getCookieJar() {
-               if ( !$this->respHeaders ) {
-                       $this->parseHeader();
-               }
-
-               return $this->cookieJar;
-       }
-
-       /**
-        * Sets a cookie. Used before a request to set up any individual
-        * cookies. Used internally after a request to parse the
-        * Set-Cookie headers.
-        * @see Cookie::set
-        * @param string $name
-        * @param mixed $value
-        * @param array $attr
-        */
-       public function setCookie( $name, $value = null, $attr = null ) {
-               if ( !$this->cookieJar ) {
-                       $this->cookieJar = new CookieJar;
-               }
-
-               $this->cookieJar->setCookie( $name, $value, $attr );
-       }
-
-       /**
-        * Parse the cookies in the response headers and store them in the cookie jar.
-        */
-       protected function parseCookies() {
-
-               if ( !$this->cookieJar ) {
-                       $this->cookieJar = new CookieJar;
-               }
-
-               if ( isset( $this->respHeaders['set-cookie'] ) ) {
-                       $url = parse_url( $this->getFinalUrl() );
-                       foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
-                               $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
-                       }
-               }
-
-       }
-
-       /**
-        * Returns the final URL after all redirections.
-        *
-        * Relative values of the "Location" header are incorrect as
-        * stated in RFC, however they do happen and modern browsers
-        * support them.  This function loops backwards through all
-        * locations in order to build the proper absolute URI - Marooned
-        * at wikia-inc.com
-        *
-        * Note that the multiple Location: headers are an artifact of
-        * CURL -- they shouldn't actually get returned this way. Rewrite
-        * this when bug 29232 is taken care of (high-level redirect
-        * handling rewrite).
-        *
-        * @return string
-        */
-       public function getFinalUrl() {
-               $headers = $this->getResponseHeaders();
-
-               // return full url (fix for incorrect but handled relative location)
-               if ( isset( $headers['location'] ) ) {
-                       $locations = $headers['location'];
-                       $domain = '';
-                       $foundRelativeURI = false;
-                       $countLocations = count( $locations );
-
-                       for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
-                               $url = parse_url( $locations[$i] );
-
-                               if ( isset( $url['host'] ) ) {
-                                       $domain = $url['scheme'] . '://' . $url['host'];
-                                       break; // found correct URI (with host)
-                               } else {
-                                       $foundRelativeURI = true;
-                               }
-                       }
-
-                       if ( $foundRelativeURI ) {
-                               if ( $domain ) {
-                                       return $domain . $locations[$countLocations - 1];
-                               } else {
-                                       $url = parse_url( $this->url );
-                                       if ( isset( $url['host'] ) ) {
-                                               return $url['scheme'] . '://' . $url['host'] .
-                                                       $locations[$countLocations - 1];
-                                       }
-                               }
-                       } else {
-                               return $locations[$countLocations - 1];
-                       }
-               }
-
-               return $this->url;
-       }
-
-       /**
-        * Returns true if the backend can follow redirects. Overridden by the
-        * child classes.
-        * @return bool
-        */
-       public function canFollowRedirects() {
-               return true;
-       }
-}
-
-/**
- * MWHttpRequest implemented using internal curl compiled into PHP
- */
-class CurlHttpRequest extends MWHttpRequest {
-       const SUPPORTS_FILE_POSTS = true;
-
-       protected $curlOptions = [];
-       protected $headerText = "";
-
-       /**
-        * @param resource $fh
-        * @param string $content
-        * @return int
-        */
-       protected function readHeader( $fh, $content ) {
-               $this->headerText .= $content;
-               return strlen( $content );
-       }
-
-       public function execute() {
-
-               parent::execute();
-
-               if ( !$this->status->isOK() ) {
-                       return $this->status;
-               }
-
-               $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
-               $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
-
-               // Only supported in curl >= 7.16.2
-               if ( defined( 'CURLOPT_CONNECTTIMEOUT_MS' ) ) {
-                       $this->curlOptions[CURLOPT_CONNECTTIMEOUT_MS] = $this->connectTimeout * 1000;
-               }
-
-               $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
-               $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
-               $this->curlOptions[CURLOPT_HEADERFUNCTION] = [ $this, "readHeader" ];
-               $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
-               $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
-
-               $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
-
-               $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost ? 2 : 0;
-               $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
-
-               if ( $this->caInfo ) {
-                       $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
-               }
-
-               if ( $this->headersOnly ) {
-                       $this->curlOptions[CURLOPT_NOBODY] = true;
-                       $this->curlOptions[CURLOPT_HEADER] = true;
-               } elseif ( $this->method == 'POST' ) {
-                       $this->curlOptions[CURLOPT_POST] = true;
-                       $postData = $this->postData;
-                       // Don't interpret POST parameters starting with '@' as file uploads, because this
-                       // makes it impossible to POST plain values starting with '@' (and causes security
-                       // issues potentially exposing the contents of local files).
-                       // The PHP manual says this option was introduced in PHP 5.5 defaults to true in PHP 5.6,
-                       // but we support lower versions, and the option doesn't exist in HHVM 5.6.99.
-                       if ( defined( 'CURLOPT_SAFE_UPLOAD' ) ) {
-                               $this->curlOptions[CURLOPT_SAFE_UPLOAD] = true;
-                       } elseif ( is_array( $postData ) ) {
-                               // In PHP 5.2 and later, '@' is interpreted as a file upload if POSTFIELDS
-                               // is an array, but not if it's a string. So convert $req['body'] to a string
-                               // for safety.
-                               $postData = wfArrayToCgi( $postData );
-                       }
-                       $this->curlOptions[CURLOPT_POSTFIELDS] = $postData;
-
-                       // Suppress 'Expect: 100-continue' header, as some servers
-                       // will reject it with a 417 and Curl won't auto retry
-                       // with HTTP 1.0 fallback
-                       $this->reqHeaders['Expect'] = '';
-               } else {
-                       $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
-               }
-
-               $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
-
-               $curlHandle = curl_init( $this->url );
-
-               if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
-                       throw new MWException( "Error setting curl options." );
-               }
-
-               if ( $this->followRedirects && $this->canFollowRedirects() ) {
-                       MediaWiki\suppressWarnings();
-                       if ( !curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
-                               wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
-                                       "Probably open_basedir is set.\n" );
-                               // Continue the processing. If it were in curl_setopt_array,
-                               // processing would have halted on its entry
-                       }
-                       MediaWiki\restoreWarnings();
-               }
-
-               if ( $this->profiler ) {
-                       $profileSection = $this->profiler->scopedProfileIn(
-                               __METHOD__ . '-' . $this->profileName
-                       );
-               }
-
-               $curlRes = curl_exec( $curlHandle );
-               if ( curl_errno( $curlHandle ) == CURLE_OPERATION_TIMEOUTED ) {
-                       $this->status->fatal( 'http-timed-out', $this->url );
-               } elseif ( $curlRes === false ) {
-                       $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
-               } else {
-                       $this->headerList = explode( "\r\n", $this->headerText );
-               }
-
-               curl_close( $curlHandle );
-
-               if ( $this->profiler ) {
-                       $this->profiler->scopedProfileOut( $profileSection );
-               }
-
-               $this->parseHeader();
-               $this->setStatus();
-
-               return $this->status;
-       }
-
-       /**
-        * @return bool
-        */
-       public function canFollowRedirects() {
-               $curlVersionInfo = curl_version();
-               if ( $curlVersionInfo['version_number'] < 0x071304 ) {
-                       wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
-                       return false;
-               }
-
-               if ( version_compare( PHP_VERSION, '5.6.0', '<' ) ) {
-                       if ( strval( ini_get( 'open_basedir' ) ) !== '' ) {
-                               wfDebug( "Cannot follow redirects when open_basedir is set\n" );
-                               return false;
-                       }
-               }
-
-               return true;
-       }
-}
-
-class PhpHttpRequest extends MWHttpRequest {
-
-       private $fopenErrors = [];
-
-       /**
-        * @param string $url
-        * @return string
-        */
-       protected function urlToTcp( $url ) {
-               $parsedUrl = parse_url( $url );
-
-               return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
-       }
-
-       /**
-        * Returns an array with a 'capath' or 'cafile' key
-        * that is suitable to be merged into the 'ssl' sub-array of
-        * a stream context options array.
-        * Uses the 'caInfo' option of the class if it is provided, otherwise uses the system
-        * default CA bundle if PHP supports that, or searches a few standard locations.
-        * @return array
-        * @throws DomainException
-        */
-       protected function getCertOptions() {
-               $certOptions = [];
-               $certLocations = [];
-               if ( $this->caInfo ) {
-                       $certLocations = [ 'manual' => $this->caInfo ];
-               } elseif ( version_compare( PHP_VERSION, '5.6.0', '<' ) ) {
-                       // @codingStandardsIgnoreStart Generic.Files.LineLength
-                       // Default locations, based on
-                       // https://www.happyassassin.net/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
-                       // PHP 5.5 and older doesn't have any defaults, so we try to guess ourselves.
-                       // PHP 5.6+ gets the CA location from OpenSSL as long as it is not set manually,
-                       // so we should leave capath/cafile empty there.
-                       // @codingStandardsIgnoreEnd
-                       $certLocations = array_filter( [
-                               getenv( 'SSL_CERT_DIR' ),
-                               getenv( 'SSL_CERT_PATH' ),
-                               '/etc/pki/tls/certs/ca-bundle.crt', # Fedora et al
-                               '/etc/ssl/certs',  # Debian et al
-                               '/etc/pki/tls/certs/ca-bundle.trust.crt',
-                               '/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem',
-                               '/System/Library/OpenSSL', # OSX
-                       ] );
-               }
-
-               foreach ( $certLocations as $key => $cert ) {
-                       if ( is_dir( $cert ) ) {
-                               $certOptions['capath'] = $cert;
-                               break;
-                       } elseif ( is_file( $cert ) ) {
-                               $certOptions['cafile'] = $cert;
-                               break;
-                       } elseif ( $key === 'manual' ) {
-                               // fail more loudly if a cert path was manually configured and it is not valid
-                               throw new DomainException( "Invalid CA info passed: $cert" );
-                       }
-               }
-
-               return $certOptions;
-       }
-
-       /**
-        * Custom error handler for dealing with fopen() errors.
-        * fopen() tends to fire multiple errors in succession, and the last one
-        * is completely useless (something like "fopen: failed to open stream")
-        * so normal methods of handling errors programmatically
-        * like get_last_error() don't work.
-        */
-       public function errorHandler( $errno, $errstr ) {
-               $n = count( $this->fopenErrors ) + 1;
-               $this->fopenErrors += [ "errno$n" => $errno, "errstr$n" => $errstr ];
-       }
-
-       public function execute() {
-
-               parent::execute();
-
-               if ( is_array( $this->postData ) ) {
-                       $this->postData = wfArrayToCgi( $this->postData );
-               }
-
-               if ( $this->parsedUrl['scheme'] != 'http'
-                       && $this->parsedUrl['scheme'] != 'https' ) {
-                       $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
-               }
-
-               $this->reqHeaders['Accept'] = "*/*";
-               $this->reqHeaders['Connection'] = 'Close';
-               if ( $this->method == 'POST' ) {
-                       // Required for HTTP 1.0 POSTs
-                       $this->reqHeaders['Content-Length'] = strlen( $this->postData );
-                       if ( !isset( $this->reqHeaders['Content-Type'] ) ) {
-                               $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
-                       }
-               }
-
-               // Set up PHP stream context
-               $options = [
-                       'http' => [
-                               'method' => $this->method,
-                               'header' => implode( "\r\n", $this->getHeaderList() ),
-                               'protocol_version' => '1.1',
-                               'max_redirects' => $this->followRedirects ? $this->maxRedirects : 0,
-                               'ignore_errors' => true,
-                               'timeout' => $this->timeout,
-                               // Curl options in case curlwrappers are installed
-                               'curl_verify_ssl_host' => $this->sslVerifyHost ? 2 : 0,
-                               'curl_verify_ssl_peer' => $this->sslVerifyCert,
-                       ],
-                       'ssl' => [
-                               'verify_peer' => $this->sslVerifyCert,
-                               'SNI_enabled' => true,
-                               'ciphers' => 'HIGH:!SSLv2:!SSLv3:-ADH:-kDH:-kECDH:-DSS',
-                               'disable_compression' => true,
-                       ],
-               ];
-
-               if ( $this->proxy ) {
-                       $options['http']['proxy'] = $this->urlToTcp( $this->proxy );
-                       $options['http']['request_fulluri'] = true;
-               }
-
-               if ( $this->postData ) {
-                       $options['http']['content'] = $this->postData;
-               }
-
-               if ( $this->sslVerifyHost ) {
-                       // PHP 5.6.0 deprecates CN_match, in favour of peer_name which
-                       // actually checks SubjectAltName properly.
-                       if ( version_compare( PHP_VERSION, '5.6.0', '>=' ) ) {
-                               $options['ssl']['peer_name'] = $this->parsedUrl['host'];
-                       } else {
-                               $options['ssl']['CN_match'] = $this->parsedUrl['host'];
-                       }
-               }
-
-               $options['ssl'] += $this->getCertOptions();
-
-               $context = stream_context_create( $options );
-
-               $this->headerList = [];
-               $reqCount = 0;
-               $url = $this->url;
-
-               $result = [];
-
-               if ( $this->profiler ) {
-                       $profileSection = $this->profiler->scopedProfileIn(
-                               __METHOD__ . '-' . $this->profileName
-                       );
-               }
-               do {
-                       $reqCount++;
-                       $this->fopenErrors = [];
-                       set_error_handler( [ $this, 'errorHandler' ] );
-                       $fh = fopen( $url, "r", false, $context );
-                       restore_error_handler();
-
-                       if ( !$fh ) {
-                               // HACK for instant commons.
-                               // If we are contacting (commons|upload).wikimedia.org
-                               // try again with CN_match for en.wikipedia.org
-                               // as php does not handle SubjectAltName properly
-                               // prior to "peer_name" option in php 5.6
-                               if ( isset( $options['ssl']['CN_match'] )
-                                       && ( $options['ssl']['CN_match'] === 'commons.wikimedia.org'
-                                               || $options['ssl']['CN_match'] === 'upload.wikimedia.org' )
-                               ) {
-                                       $options['ssl']['CN_match'] = 'en.wikipedia.org';
-                                       $context = stream_context_create( $options );
-                                       continue;
-                               }
-                               break;
-                       }
-
-                       $result = stream_get_meta_data( $fh );
-                       $this->headerList = $result['wrapper_data'];
-                       $this->parseHeader();
-
-                       if ( !$this->followRedirects ) {
-                               break;
-                       }
-
-                       # Handle manual redirection
-                       if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
-                               break;
-                       }
-                       # Check security of URL
-                       $url = $this->getResponseHeader( "Location" );
-
-                       if ( !Http::isValidURI( $url ) ) {
-                               wfDebug( __METHOD__ . ": insecure redirection\n" );
-                               break;
-                       }
-               } while ( true );
-               if ( $this->profiler ) {
-                       $this->profiler->scopedProfileOut( $profileSection );
-               }
-
-               $this->setStatus();
-
-               if ( $fh === false ) {
-                       if ( $this->fopenErrors ) {
-                               LoggerFactory::getInstance( 'http' )->warning( __CLASS__
-                                       . ': error opening connection: {errstr1}', $this->fopenErrors );
-                       }
-                       $this->status->fatal( 'http-request-error' );
-                       return $this->status;
-               }
-
-               if ( $result['timed_out'] ) {
-                       $this->status->fatal( 'http-timed-out', $this->url );
-                       return $this->status;
-               }
-
-               // If everything went OK, or we received some error code
-               // get the response body content.
-               if ( $this->status->isOK() || (int)$this->respStatus >= 300 ) {
-                       while ( !feof( $fh ) ) {
-                               $buf = fread( $fh, 8192 );
-
-                               if ( $buf === false ) {
-                                       $this->status->fatal( 'http-read-error' );
-                                       break;
-                               }
-
-                               if ( strlen( $buf ) ) {
-                                       call_user_func( $this->callback, $fh, $buf );
-                               }
-                       }
-               }
-               fclose( $fh );
-
-               return $this->status;
-       }
-}
diff --git a/includes/http/CurlHttpRequest.php b/includes/http/CurlHttpRequest.php
new file mode 100644 (file)
index 0000000..7714818
--- /dev/null
@@ -0,0 +1,165 @@
+<?php
+/**
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * MWHttpRequest implemented using internal curl compiled into PHP
+ */
+class CurlHttpRequest extends MWHttpRequest {
+       const SUPPORTS_FILE_POSTS = true;
+
+       protected $curlOptions = [];
+       protected $headerText = "";
+
+       /**
+        * @param resource $fh
+        * @param string $content
+        * @return int
+        */
+       protected function readHeader( $fh, $content ) {
+               $this->headerText .= $content;
+               return strlen( $content );
+       }
+
+       public function execute() {
+
+               parent::execute();
+
+               if ( !$this->status->isOK() ) {
+                       return $this->status;
+               }
+
+               $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
+               $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
+
+               // Only supported in curl >= 7.16.2
+               if ( defined( 'CURLOPT_CONNECTTIMEOUT_MS' ) ) {
+                       $this->curlOptions[CURLOPT_CONNECTTIMEOUT_MS] = $this->connectTimeout * 1000;
+               }
+
+               $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
+               $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
+               $this->curlOptions[CURLOPT_HEADERFUNCTION] = [ $this, "readHeader" ];
+               $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
+               $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
+
+               $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
+
+               $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost ? 2 : 0;
+               $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
+
+               if ( $this->caInfo ) {
+                       $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
+               }
+
+               if ( $this->headersOnly ) {
+                       $this->curlOptions[CURLOPT_NOBODY] = true;
+                       $this->curlOptions[CURLOPT_HEADER] = true;
+               } elseif ( $this->method == 'POST' ) {
+                       $this->curlOptions[CURLOPT_POST] = true;
+                       $postData = $this->postData;
+                       // Don't interpret POST parameters starting with '@' as file uploads, because this
+                       // makes it impossible to POST plain values starting with '@' (and causes security
+                       // issues potentially exposing the contents of local files).
+                       // The PHP manual says this option was introduced in PHP 5.5 defaults to true in PHP 5.6,
+                       // but we support lower versions, and the option doesn't exist in HHVM 5.6.99.
+                       if ( defined( 'CURLOPT_SAFE_UPLOAD' ) ) {
+                               $this->curlOptions[CURLOPT_SAFE_UPLOAD] = true;
+                       } elseif ( is_array( $postData ) ) {
+                               // In PHP 5.2 and later, '@' is interpreted as a file upload if POSTFIELDS
+                               // is an array, but not if it's a string. So convert $req['body'] to a string
+                               // for safety.
+                               $postData = wfArrayToCgi( $postData );
+                       }
+                       $this->curlOptions[CURLOPT_POSTFIELDS] = $postData;
+
+                       // Suppress 'Expect: 100-continue' header, as some servers
+                       // will reject it with a 417 and Curl won't auto retry
+                       // with HTTP 1.0 fallback
+                       $this->reqHeaders['Expect'] = '';
+               } else {
+                       $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
+               }
+
+               $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
+
+               $curlHandle = curl_init( $this->url );
+
+               if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
+                       throw new MWException( "Error setting curl options." );
+               }
+
+               if ( $this->followRedirects && $this->canFollowRedirects() ) {
+                       MediaWiki\suppressWarnings();
+                       if ( !curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
+                               wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
+                                       "Probably open_basedir is set.\n" );
+                               // Continue the processing. If it were in curl_setopt_array,
+                               // processing would have halted on its entry
+                       }
+                       MediaWiki\restoreWarnings();
+               }
+
+               if ( $this->profiler ) {
+                       $profileSection = $this->profiler->scopedProfileIn(
+                               __METHOD__ . '-' . $this->profileName
+                       );
+               }
+
+               $curlRes = curl_exec( $curlHandle );
+               if ( curl_errno( $curlHandle ) == CURLE_OPERATION_TIMEOUTED ) {
+                       $this->status->fatal( 'http-timed-out', $this->url );
+               } elseif ( $curlRes === false ) {
+                       $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
+               } else {
+                       $this->headerList = explode( "\r\n", $this->headerText );
+               }
+
+               curl_close( $curlHandle );
+
+               if ( $this->profiler ) {
+                       $this->profiler->scopedProfileOut( $profileSection );
+               }
+
+               $this->parseHeader();
+               $this->setStatus();
+
+               return $this->status;
+       }
+
+       /**
+        * @return bool
+        */
+       public function canFollowRedirects() {
+               $curlVersionInfo = curl_version();
+               if ( $curlVersionInfo['version_number'] < 0x071304 ) {
+                       wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
+                       return false;
+               }
+
+               if ( version_compare( PHP_VERSION, '5.6.0', '<' ) ) {
+                       if ( strval( ini_get( 'open_basedir' ) ) !== '' ) {
+                               wfDebug( "Cannot follow redirects when open_basedir is set\n" );
+                               return false;
+                       }
+               }
+
+               return true;
+       }
+}
diff --git a/includes/http/Http.php b/includes/http/Http.php
new file mode 100644 (file)
index 0000000..46d2047
--- /dev/null
@@ -0,0 +1,162 @@
+<?php
+/**
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+use MediaWiki\Logger\LoggerFactory;
+
+/**
+ * Various HTTP related functions
+ * @ingroup HTTP
+ */
+class Http {
+       static public $httpEngine = false;
+
+       /**
+        * Perform an HTTP request
+        *
+        * @param string $method HTTP method. Usually GET/POST
+        * @param string $url Full URL to act on. If protocol-relative, will be expanded to an http:// URL
+        * @param array $options Options to pass to MWHttpRequest object.
+        *      Possible keys for the array:
+        *    - timeout             Timeout length in seconds
+        *    - connectTimeout      Timeout for connection, in seconds (curl only)
+        *    - postData            An array of key-value pairs or a url-encoded form data
+        *    - proxy               The proxy to use.
+        *                          Otherwise it will use $wgHTTPProxy (if set)
+        *                          Otherwise it will use the environment variable "http_proxy" (if set)
+        *    - noProxy             Don't use any proxy at all. Takes precedence over proxy value(s).
+        *    - sslVerifyHost       Verify hostname against certificate
+        *    - sslVerifyCert       Verify SSL certificate
+        *    - caInfo              Provide CA information
+        *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
+        *    - followRedirects     Whether to follow redirects (defaults to false).
+        *                                  Note: this should only be used when the target URL is trusted,
+        *                                  to avoid attacks on intranet services accessible by HTTP.
+        *    - userAgent           A user agent, if you want to override the default
+        *                          MediaWiki/$wgVersion
+        * @param string $caller The method making this request, for profiling
+        * @return string|bool (bool)false on failure or a string on success
+        */
+       public static function request( $method, $url, $options = [], $caller = __METHOD__ ) {
+               wfDebug( "HTTP: $method: $url\n" );
+
+               $options['method'] = strtoupper( $method );
+
+               if ( !isset( $options['timeout'] ) ) {
+                       $options['timeout'] = 'default';
+               }
+               if ( !isset( $options['connectTimeout'] ) ) {
+                       $options['connectTimeout'] = 'default';
+               }
+
+               $req = MWHttpRequest::factory( $url, $options, $caller );
+               $status = $req->execute();
+
+               if ( $status->isOK() ) {
+                       return $req->getContent();
+               } else {
+                       $errors = $status->getErrorsByType( 'error' );
+                       $logger = LoggerFactory::getInstance( 'http' );
+                       $logger->warning( $status->getWikiText( false, false, 'en' ),
+                               [ 'error' => $errors, 'caller' => $caller, 'content' => $req->getContent() ] );
+                       return false;
+               }
+       }
+
+       /**
+        * Simple wrapper for Http::request( 'GET' )
+        * @see Http::request()
+        * @since 1.25 Second parameter $timeout removed. Second parameter
+        * is now $options which can be given a 'timeout'
+        *
+        * @param string $url
+        * @param array $options
+        * @param string $caller The method making this request, for profiling
+        * @return string|bool false on error
+        */
+       public static function get( $url, $options = [], $caller = __METHOD__ ) {
+               $args = func_get_args();
+               if ( isset( $args[1] ) && ( is_string( $args[1] ) || is_numeric( $args[1] ) ) ) {
+                       // Second was used to be the timeout
+                       // And third parameter used to be $options
+                       wfWarn( "Second parameter should not be a timeout.", 2 );
+                       $options = isset( $args[2] ) && is_array( $args[2] ) ?
+                               $args[2] : [];
+                       $options['timeout'] = $args[1];
+                       $caller = __METHOD__;
+               }
+               return Http::request( 'GET', $url, $options, $caller );
+       }
+
+       /**
+        * Simple wrapper for Http::request( 'POST' )
+        * @see Http::request()
+        *
+        * @param string $url
+        * @param array $options
+        * @param string $caller The method making this request, for profiling
+        * @return string|bool false on error
+        */
+       public static function post( $url, $options = [], $caller = __METHOD__ ) {
+               return Http::request( 'POST', $url, $options, $caller );
+       }
+
+       /**
+        * A standard user-agent we can use for external requests.
+        * @return string
+        */
+       public static function userAgent() {
+               global $wgVersion;
+               return "MediaWiki/$wgVersion";
+       }
+
+       /**
+        * Checks that the given URI is a valid one. Hardcoding the
+        * protocols, because we only want protocols that both cURL
+        * and php support.
+        *
+        * file:// should not be allowed here for security purpose (r67684)
+        *
+        * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
+        *
+        * @param string $uri URI to check for validity
+        * @return bool
+        */
+       public static function isValidURI( $uri ) {
+               return preg_match(
+                       '/^https?:\/\/[^\/\s]\S*$/D',
+                       $uri
+               );
+       }
+
+       /**
+        * Gets the relevant proxy from $wgHTTPProxy
+        *
+        * @return mixed The proxy address or an empty string if not set.
+        */
+       public static function getProxy() {
+               global $wgHTTPProxy;
+
+               if ( $wgHTTPProxy ) {
+                       return $wgHTTPProxy;
+               }
+
+               return "";
+       }
+}
diff --git a/includes/http/MWHttpRequest.php b/includes/http/MWHttpRequest.php
new file mode 100644 (file)
index 0000000..30a5c21
--- /dev/null
@@ -0,0 +1,587 @@
+<?php
+/**
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * This wrapper class will call out to curl (if available) or fallback
+ * to regular PHP if necessary for handling internal HTTP requests.
+ *
+ * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
+ * PHP's HTTP extension.
+ */
+class MWHttpRequest {
+       const SUPPORTS_FILE_POSTS = false;
+
+       protected $content;
+       protected $timeout = 'default';
+       protected $headersOnly = null;
+       protected $postData = null;
+       protected $proxy = null;
+       protected $noProxy = false;
+       protected $sslVerifyHost = true;
+       protected $sslVerifyCert = true;
+       protected $caInfo = null;
+       protected $method = "GET";
+       protected $reqHeaders = [];
+       protected $url;
+       protected $parsedUrl;
+       protected $callback;
+       protected $maxRedirects = 5;
+       protected $followRedirects = false;
+
+       /**
+        * @var CookieJar
+        */
+       protected $cookieJar;
+
+       protected $headerList = [];
+       protected $respVersion = "0.9";
+       protected $respStatus = "200 Ok";
+       protected $respHeaders = [];
+
+       public $status;
+
+       /**
+        * @var Profiler
+        */
+       protected $profiler;
+
+       /**
+        * @var string
+        */
+       protected $profileName;
+
+       /**
+        * @param string $url Url to use. If protocol-relative, will be expanded to an http:// URL
+        * @param array $options (optional) extra params to pass (see Http::request())
+        * @param string $caller The method making this request, for profiling
+        * @param Profiler $profiler An instance of the profiler for profiling, or null
+        */
+       protected function __construct(
+               $url, $options = [], $caller = __METHOD__, $profiler = null
+       ) {
+               global $wgHTTPTimeout, $wgHTTPConnectTimeout;
+
+               $this->url = wfExpandUrl( $url, PROTO_HTTP );
+               $this->parsedUrl = wfParseUrl( $this->url );
+
+               if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
+                       $this->status = Status::newFatal( 'http-invalid-url', $url );
+               } else {
+                       $this->status = Status::newGood( 100 ); // continue
+               }
+
+               if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
+                       $this->timeout = $options['timeout'];
+               } else {
+                       $this->timeout = $wgHTTPTimeout;
+               }
+               if ( isset( $options['connectTimeout'] ) && $options['connectTimeout'] != 'default' ) {
+                       $this->connectTimeout = $options['connectTimeout'];
+               } else {
+                       $this->connectTimeout = $wgHTTPConnectTimeout;
+               }
+               if ( isset( $options['userAgent'] ) ) {
+                       $this->setUserAgent( $options['userAgent'] );
+               }
+
+               $members = [ "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
+                               "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" ];
+
+               foreach ( $members as $o ) {
+                       if ( isset( $options[$o] ) ) {
+                               // ensure that MWHttpRequest::method is always
+                               // uppercased. Bug 36137
+                               if ( $o == 'method' ) {
+                                       $options[$o] = strtoupper( $options[$o] );
+                               }
+                               $this->$o = $options[$o];
+                       }
+               }
+
+               if ( $this->noProxy ) {
+                       $this->proxy = ''; // noProxy takes precedence
+               }
+
+               // Profile based on what's calling us
+               $this->profiler = $profiler;
+               $this->profileName = $caller;
+       }
+
+       /**
+        * Simple function to test if we can make any sort of requests at all, using
+        * cURL or fopen()
+        * @return bool
+        */
+       public static function canMakeRequests() {
+               return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
+       }
+
+       /**
+        * Generate a new request object
+        * @param string $url Url to use
+        * @param array $options (optional) extra params to pass (see Http::request())
+        * @param string $caller The method making this request, for profiling
+        * @throws MWException
+        * @return CurlHttpRequest|PhpHttpRequest
+        * @see MWHttpRequest::__construct
+        */
+       public static function factory( $url, $options = null, $caller = __METHOD__ ) {
+               if ( !Http::$httpEngine ) {
+                       Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
+               } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
+                       throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
+                               ' Http::$httpEngine is set to "curl"' );
+               }
+
+               switch ( Http::$httpEngine ) {
+                       case 'curl':
+                               return new CurlHttpRequest( $url, $options, $caller, Profiler::instance() );
+                       case 'php':
+                               if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
+                                       throw new MWException( __METHOD__ . ': allow_url_fopen ' .
+                                               'needs to be enabled for pure PHP http requests to ' .
+                                               'work. If possible, curl should be used instead. See ' .
+                                               'http://php.net/curl.'
+                                       );
+                               }
+                               return new PhpHttpRequest( $url, $options, $caller, Profiler::instance() );
+                       default:
+                               throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
+               }
+       }
+
+       /**
+        * Get the body, or content, of the response to the request
+        *
+        * @return string
+        */
+       public function getContent() {
+               return $this->content;
+       }
+
+       /**
+        * Set the parameters of the request
+        *
+        * @param array $args
+        * @todo overload the args param
+        */
+       public function setData( $args ) {
+               $this->postData = $args;
+       }
+
+       /**
+        * Take care of setting up the proxy (do nothing if "noProxy" is set)
+        *
+        * @return void
+        */
+       public function proxySetup() {
+               // If there is an explicit proxy set and proxies are not disabled, then use it
+               if ( $this->proxy && !$this->noProxy ) {
+                       return;
+               }
+
+               // Otherwise, fallback to $wgHTTPProxy if this is not a machine
+               // local URL and proxies are not disabled
+               if ( self::isLocalURL( $this->url ) || $this->noProxy ) {
+                       $this->proxy = '';
+               } else {
+                       $this->proxy = Http::getProxy();
+               }
+       }
+
+       /**
+        * Check if the URL can be served by localhost
+        *
+        * @param string $url Full url to check
+        * @return bool
+        */
+       private static function isLocalURL( $url ) {
+               global $wgCommandLineMode, $wgLocalVirtualHosts;
+
+               if ( $wgCommandLineMode ) {
+                       return false;
+               }
+
+               // Extract host part
+               $matches = [];
+               if ( preg_match( '!^https?://([\w.-]+)[/:].*$!', $url, $matches ) ) {
+                       $host = $matches[1];
+                       // Split up dotwise
+                       $domainParts = explode( '.', $host );
+                       // Check if this domain or any superdomain is listed as a local virtual host
+                       $domainParts = array_reverse( $domainParts );
+
+                       $domain = '';
+                       $countParts = count( $domainParts );
+                       for ( $i = 0; $i < $countParts; $i++ ) {
+                               $domainPart = $domainParts[$i];
+                               if ( $i == 0 ) {
+                                       $domain = $domainPart;
+                               } else {
+                                       $domain = $domainPart . '.' . $domain;
+                               }
+
+                               if ( in_array( $domain, $wgLocalVirtualHosts ) ) {
+                                       return true;
+                               }
+                       }
+               }
+
+               return false;
+       }
+
+       /**
+        * Set the user agent
+        * @param string $UA
+        */
+       public function setUserAgent( $UA ) {
+               $this->setHeader( 'User-Agent', $UA );
+       }
+
+       /**
+        * Set an arbitrary header
+        * @param string $name
+        * @param string $value
+        */
+       public function setHeader( $name, $value ) {
+               // I feel like I should normalize the case here...
+               $this->reqHeaders[$name] = $value;
+       }
+
+       /**
+        * Get an array of the headers
+        * @return array
+        */
+       public function getHeaderList() {
+               $list = [];
+
+               if ( $this->cookieJar ) {
+                       $this->reqHeaders['Cookie'] =
+                               $this->cookieJar->serializeToHttpRequest(
+                                       $this->parsedUrl['path'],
+                                       $this->parsedUrl['host']
+                               );
+               }
+
+               foreach ( $this->reqHeaders as $name => $value ) {
+                       $list[] = "$name: $value";
+               }
+
+               return $list;
+       }
+
+       /**
+        * Set a read callback to accept data read from the HTTP request.
+        * By default, data is appended to an internal buffer which can be
+        * retrieved through $req->getContent().
+        *
+        * To handle data as it comes in -- especially for large files that
+        * would not fit in memory -- you can instead set your own callback,
+        * in the form function($resource, $buffer) where the first parameter
+        * is the low-level resource being read (implementation specific),
+        * and the second parameter is the data buffer.
+        *
+        * You MUST return the number of bytes handled in the buffer; if fewer
+        * bytes are reported handled than were passed to you, the HTTP fetch
+        * will be aborted.
+        *
+        * @param callable $callback
+        * @throws MWException
+        */
+       public function setCallback( $callback ) {
+               if ( !is_callable( $callback ) ) {
+                       throw new MWException( 'Invalid MwHttpRequest callback' );
+               }
+               $this->callback = $callback;
+       }
+
+       /**
+        * A generic callback to read the body of the response from a remote
+        * server.
+        *
+        * @param resource $fh
+        * @param string $content
+        * @return int
+        */
+       public function read( $fh, $content ) {
+               $this->content .= $content;
+               return strlen( $content );
+       }
+
+       /**
+        * Take care of whatever is necessary to perform the URI request.
+        *
+        * @return Status
+        */
+       public function execute() {
+
+               $this->content = "";
+
+               if ( strtoupper( $this->method ) == "HEAD" ) {
+                       $this->headersOnly = true;
+               }
+
+               $this->proxySetup(); // set up any proxy as needed
+
+               if ( !$this->callback ) {
+                       $this->setCallback( [ $this, 'read' ] );
+               }
+
+               if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
+                       $this->setUserAgent( Http::userAgent() );
+               }
+
+       }
+
+       /**
+        * Parses the headers, including the HTTP status code and any
+        * Set-Cookie headers.  This function expects the headers to be
+        * found in an array in the member variable headerList.
+        */
+       protected function parseHeader() {
+
+               $lastname = "";
+
+               foreach ( $this->headerList as $header ) {
+                       if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
+                               $this->respVersion = $match[1];
+                               $this->respStatus = $match[2];
+                       } elseif ( preg_match( "#^[ \t]#", $header ) ) {
+                               $last = count( $this->respHeaders[$lastname] ) - 1;
+                               $this->respHeaders[$lastname][$last] .= "\r\n$header";
+                       } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
+                               $this->respHeaders[strtolower( $match[1] )][] = $match[2];
+                               $lastname = strtolower( $match[1] );
+                       }
+               }
+
+               $this->parseCookies();
+
+       }
+
+       /**
+        * Sets HTTPRequest status member to a fatal value with the error
+        * message if the returned integer value of the status code was
+        * not successful (< 300) or a redirect (>=300 and < 400).  (see
+        * RFC2616, section 10,
+        * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
+        * list of status codes.)
+        */
+       protected function setStatus() {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               if ( (int)$this->respStatus > 399 ) {
+                       list( $code, $message ) = explode( " ", $this->respStatus, 2 );
+                       $this->status->fatal( "http-bad-status", $code, $message );
+               }
+       }
+
+       /**
+        * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
+        * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
+        * for a list of status codes.)
+        *
+        * @return int
+        */
+       public function getStatus() {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               return (int)$this->respStatus;
+       }
+
+       /**
+        * Returns true if the last status code was a redirect.
+        *
+        * @return bool
+        */
+       public function isRedirect() {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               $status = (int)$this->respStatus;
+
+               if ( $status >= 300 && $status <= 303 ) {
+                       return true;
+               }
+
+               return false;
+       }
+
+       /**
+        * Returns an associative array of response headers after the
+        * request has been executed.  Because some headers
+        * (e.g. Set-Cookie) can appear more than once the, each value of
+        * the associative array is an array of the values given.
+        *
+        * @return array
+        */
+       public function getResponseHeaders() {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               return $this->respHeaders;
+       }
+
+       /**
+        * Returns the value of the given response header.
+        *
+        * @param string $header
+        * @return string|null
+        */
+       public function getResponseHeader( $header ) {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               if ( isset( $this->respHeaders[strtolower( $header )] ) ) {
+                       $v = $this->respHeaders[strtolower( $header )];
+                       return $v[count( $v ) - 1];
+               }
+
+               return null;
+       }
+
+       /**
+        * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
+        *
+        * @param CookieJar $jar
+        */
+       public function setCookieJar( $jar ) {
+               $this->cookieJar = $jar;
+       }
+
+       /**
+        * Returns the cookie jar in use.
+        *
+        * @return CookieJar
+        */
+       public function getCookieJar() {
+               if ( !$this->respHeaders ) {
+                       $this->parseHeader();
+               }
+
+               return $this->cookieJar;
+       }
+
+       /**
+        * Sets a cookie. Used before a request to set up any individual
+        * cookies. Used internally after a request to parse the
+        * Set-Cookie headers.
+        * @see Cookie::set
+        * @param string $name
+        * @param mixed $value
+        * @param array $attr
+        */
+       public function setCookie( $name, $value = null, $attr = null ) {
+               if ( !$this->cookieJar ) {
+                       $this->cookieJar = new CookieJar;
+               }
+
+               $this->cookieJar->setCookie( $name, $value, $attr );
+       }
+
+       /**
+        * Parse the cookies in the response headers and store them in the cookie jar.
+        */
+       protected function parseCookies() {
+
+               if ( !$this->cookieJar ) {
+                       $this->cookieJar = new CookieJar;
+               }
+
+               if ( isset( $this->respHeaders['set-cookie'] ) ) {
+                       $url = parse_url( $this->getFinalUrl() );
+                       foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
+                               $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
+                       }
+               }
+
+       }
+
+       /**
+        * Returns the final URL after all redirections.
+        *
+        * Relative values of the "Location" header are incorrect as
+        * stated in RFC, however they do happen and modern browsers
+        * support them.  This function loops backwards through all
+        * locations in order to build the proper absolute URI - Marooned
+        * at wikia-inc.com
+        *
+        * Note that the multiple Location: headers are an artifact of
+        * CURL -- they shouldn't actually get returned this way. Rewrite
+        * this when bug 29232 is taken care of (high-level redirect
+        * handling rewrite).
+        *
+        * @return string
+        */
+       public function getFinalUrl() {
+               $headers = $this->getResponseHeaders();
+
+               // return full url (fix for incorrect but handled relative location)
+               if ( isset( $headers['location'] ) ) {
+                       $locations = $headers['location'];
+                       $domain = '';
+                       $foundRelativeURI = false;
+                       $countLocations = count( $locations );
+
+                       for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
+                               $url = parse_url( $locations[$i] );
+
+                               if ( isset( $url['host'] ) ) {
+                                       $domain = $url['scheme'] . '://' . $url['host'];
+                                       break; // found correct URI (with host)
+                               } else {
+                                       $foundRelativeURI = true;
+                               }
+                       }
+
+                       if ( $foundRelativeURI ) {
+                               if ( $domain ) {
+                                       return $domain . $locations[$countLocations - 1];
+                               } else {
+                                       $url = parse_url( $this->url );
+                                       if ( isset( $url['host'] ) ) {
+                                               return $url['scheme'] . '://' . $url['host'] .
+                                                       $locations[$countLocations - 1];
+                                       }
+                               }
+                       } else {
+                               return $locations[$countLocations - 1];
+                       }
+               }
+
+               return $this->url;
+       }
+
+       /**
+        * Returns true if the backend can follow redirects. Overridden by the
+        * child classes.
+        * @return bool
+        */
+       public function canFollowRedirects() {
+               return true;
+       }
+}
diff --git a/includes/http/PhpHttpRequest.php b/includes/http/PhpHttpRequest.php
new file mode 100644 (file)
index 0000000..f422ff7
--- /dev/null
@@ -0,0 +1,259 @@
+<?php
+/**
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+use MediaWiki\Logger\LoggerFactory;
+
+class PhpHttpRequest extends MWHttpRequest {
+
+       private $fopenErrors = [];
+
+       /**
+        * @param string $url
+        * @return string
+        */
+       protected function urlToTcp( $url ) {
+               $parsedUrl = parse_url( $url );
+
+               return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
+       }
+
+       /**
+        * Returns an array with a 'capath' or 'cafile' key
+        * that is suitable to be merged into the 'ssl' sub-array of
+        * a stream context options array.
+        * Uses the 'caInfo' option of the class if it is provided, otherwise uses the system
+        * default CA bundle if PHP supports that, or searches a few standard locations.
+        * @return array
+        * @throws DomainException
+        */
+       protected function getCertOptions() {
+               $certOptions = [];
+               $certLocations = [];
+               if ( $this->caInfo ) {
+                       $certLocations = [ 'manual' => $this->caInfo ];
+               } elseif ( version_compare( PHP_VERSION, '5.6.0', '<' ) ) {
+                       // @codingStandardsIgnoreStart Generic.Files.LineLength
+                       // Default locations, based on
+                       // https://www.happyassassin.net/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
+                       // PHP 5.5 and older doesn't have any defaults, so we try to guess ourselves.
+                       // PHP 5.6+ gets the CA location from OpenSSL as long as it is not set manually,
+                       // so we should leave capath/cafile empty there.
+                       // @codingStandardsIgnoreEnd
+                       $certLocations = array_filter( [
+                               getenv( 'SSL_CERT_DIR' ),
+                               getenv( 'SSL_CERT_PATH' ),
+                               '/etc/pki/tls/certs/ca-bundle.crt', # Fedora et al
+                               '/etc/ssl/certs',  # Debian et al
+                               '/etc/pki/tls/certs/ca-bundle.trust.crt',
+                               '/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem',
+                               '/System/Library/OpenSSL', # OSX
+                       ] );
+               }
+
+               foreach ( $certLocations as $key => $cert ) {
+                       if ( is_dir( $cert ) ) {
+                               $certOptions['capath'] = $cert;
+                               break;
+                       } elseif ( is_file( $cert ) ) {
+                               $certOptions['cafile'] = $cert;
+                               break;
+                       } elseif ( $key === 'manual' ) {
+                               // fail more loudly if a cert path was manually configured and it is not valid
+                               throw new DomainException( "Invalid CA info passed: $cert" );
+                       }
+               }
+
+               return $certOptions;
+       }
+
+       /**
+        * Custom error handler for dealing with fopen() errors.
+        * fopen() tends to fire multiple errors in succession, and the last one
+        * is completely useless (something like "fopen: failed to open stream")
+        * so normal methods of handling errors programmatically
+        * like get_last_error() don't work.
+        */
+       public function errorHandler( $errno, $errstr ) {
+               $n = count( $this->fopenErrors ) + 1;
+               $this->fopenErrors += [ "errno$n" => $errno, "errstr$n" => $errstr ];
+       }
+
+       public function execute() {
+
+               parent::execute();
+
+               if ( is_array( $this->postData ) ) {
+                       $this->postData = wfArrayToCgi( $this->postData );
+               }
+
+               if ( $this->parsedUrl['scheme'] != 'http'
+                       && $this->parsedUrl['scheme'] != 'https' ) {
+                       $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
+               }
+
+               $this->reqHeaders['Accept'] = "*/*";
+               $this->reqHeaders['Connection'] = 'Close';
+               if ( $this->method == 'POST' ) {
+                       // Required for HTTP 1.0 POSTs
+                       $this->reqHeaders['Content-Length'] = strlen( $this->postData );
+                       if ( !isset( $this->reqHeaders['Content-Type'] ) ) {
+                               $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
+                       }
+               }
+
+               // Set up PHP stream context
+               $options = [
+                       'http' => [
+                               'method' => $this->method,
+                               'header' => implode( "\r\n", $this->getHeaderList() ),
+                               'protocol_version' => '1.1',
+                               'max_redirects' => $this->followRedirects ? $this->maxRedirects : 0,
+                               'ignore_errors' => true,
+                               'timeout' => $this->timeout,
+                               // Curl options in case curlwrappers are installed
+                               'curl_verify_ssl_host' => $this->sslVerifyHost ? 2 : 0,
+                               'curl_verify_ssl_peer' => $this->sslVerifyCert,
+                       ],
+                       'ssl' => [
+                               'verify_peer' => $this->sslVerifyCert,
+                               'SNI_enabled' => true,
+                               'ciphers' => 'HIGH:!SSLv2:!SSLv3:-ADH:-kDH:-kECDH:-DSS',
+                               'disable_compression' => true,
+                       ],
+               ];
+
+               if ( $this->proxy ) {
+                       $options['http']['proxy'] = $this->urlToTcp( $this->proxy );
+                       $options['http']['request_fulluri'] = true;
+               }
+
+               if ( $this->postData ) {
+                       $options['http']['content'] = $this->postData;
+               }
+
+               if ( $this->sslVerifyHost ) {
+                       // PHP 5.6.0 deprecates CN_match, in favour of peer_name which
+                       // actually checks SubjectAltName properly.
+                       if ( version_compare( PHP_VERSION, '5.6.0', '>=' ) ) {
+                               $options['ssl']['peer_name'] = $this->parsedUrl['host'];
+                       } else {
+                               $options['ssl']['CN_match'] = $this->parsedUrl['host'];
+                       }
+               }
+
+               $options['ssl'] += $this->getCertOptions();
+
+               $context = stream_context_create( $options );
+
+               $this->headerList = [];
+               $reqCount = 0;
+               $url = $this->url;
+
+               $result = [];
+
+               if ( $this->profiler ) {
+                       $profileSection = $this->profiler->scopedProfileIn(
+                               __METHOD__ . '-' . $this->profileName
+                       );
+               }
+               do {
+                       $reqCount++;
+                       $this->fopenErrors = [];
+                       set_error_handler( [ $this, 'errorHandler' ] );
+                       $fh = fopen( $url, "r", false, $context );
+                       restore_error_handler();
+
+                       if ( !$fh ) {
+                               // HACK for instant commons.
+                               // If we are contacting (commons|upload).wikimedia.org
+                               // try again with CN_match for en.wikipedia.org
+                               // as php does not handle SubjectAltName properly
+                               // prior to "peer_name" option in php 5.6
+                               if ( isset( $options['ssl']['CN_match'] )
+                                       && ( $options['ssl']['CN_match'] === 'commons.wikimedia.org'
+                                               || $options['ssl']['CN_match'] === 'upload.wikimedia.org' )
+                               ) {
+                                       $options['ssl']['CN_match'] = 'en.wikipedia.org';
+                                       $context = stream_context_create( $options );
+                                       continue;
+                               }
+                               break;
+                       }
+
+                       $result = stream_get_meta_data( $fh );
+                       $this->headerList = $result['wrapper_data'];
+                       $this->parseHeader();
+
+                       if ( !$this->followRedirects ) {
+                               break;
+                       }
+
+                       # Handle manual redirection
+                       if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
+                               break;
+                       }
+                       # Check security of URL
+                       $url = $this->getResponseHeader( "Location" );
+
+                       if ( !Http::isValidURI( $url ) ) {
+                               wfDebug( __METHOD__ . ": insecure redirection\n" );
+                               break;
+                       }
+               } while ( true );
+               if ( $this->profiler ) {
+                       $this->profiler->scopedProfileOut( $profileSection );
+               }
+
+               $this->setStatus();
+
+               if ( $fh === false ) {
+                       if ( $this->fopenErrors ) {
+                               LoggerFactory::getInstance( 'http' )->warning( __CLASS__
+                                       . ': error opening connection: {errstr1}', $this->fopenErrors );
+                       }
+                       $this->status->fatal( 'http-request-error' );
+                       return $this->status;
+               }
+
+               if ( $result['timed_out'] ) {
+                       $this->status->fatal( 'http-timed-out', $this->url );
+                       return $this->status;
+               }
+
+               // If everything went OK, or we received some error code
+               // get the response body content.
+               if ( $this->status->isOK() || (int)$this->respStatus >= 300 ) {
+                       while ( !feof( $fh ) ) {
+                               $buf = fread( $fh, 8192 );
+
+                               if ( $buf === false ) {
+                                       $this->status->fatal( 'http-read-error' );
+                                       break;
+                               }
+
+                               if ( strlen( $buf ) ) {
+                                       call_user_func( $this->callback, $fh, $buf );
+                               }
+                       }
+               }
+               fclose( $fh );
+
+               return $this->status;
+       }
+}