3 * Various HTTP related functions.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
29 * Various HTTP related functions
33 static $httpEngine = false;
36 * Perform an HTTP request
38 * @param string $method HTTP method. Usually GET/POST
39 * @param string $url full URL to act on. If protocol-relative, will be expanded to an http:// URL
40 * @param array $options options to pass to MWHttpRequest object.
41 * Possible keys for the array:
42 * - timeout Timeout length in seconds
43 * - postData An array of key-value pairs or a url-encoded form data
44 * - proxy The proxy to use.
45 * Otherwise it will use $wgHTTPProxy (if set)
46 * Otherwise it will use the environment variable "http_proxy" (if set)
47 * - noProxy Don't use any proxy at all. Takes precedence over proxy value(s).
48 * - sslVerifyHost (curl only) Verify hostname against certificate
49 * - sslVerifyCert (curl only) Verify SSL certificate
50 * - caInfo (curl only) Provide CA information
51 * - maxRedirects Maximum number of redirects to follow (defaults to 5)
52 * - followRedirects Whether to follow redirects (defaults to false).
53 * Note: this should only be used when the target URL is trusted,
54 * to avoid attacks on intranet services accessible by HTTP.
55 * - userAgent A user agent, if you want to override the default
56 * MediaWiki/$wgVersion
57 * @return Mixed: (bool)false on failure or a string on success
59 public static function request( $method, $url, $options = array() ) {
60 wfDebug( "HTTP: $method: $url\n" );
61 wfProfileIn( __METHOD__
. "-$method" );
63 $options['method'] = strtoupper( $method );
65 if ( !isset( $options['timeout'] ) ) {
66 $options['timeout'] = 'default';
69 $req = MWHttpRequest
::factory( $url, $options );
70 $status = $req->execute();
73 if ( $status->isOK() ) {
74 $content = $req->getContent();
76 wfProfileOut( __METHOD__
. "-$method" );
81 * Simple wrapper for Http::request( 'GET' )
82 * @see Http::request()
85 * @param $timeout string
86 * @param $options array
89 public static function get( $url, $timeout = 'default', $options = array() ) {
90 $options['timeout'] = $timeout;
91 return Http
::request( 'GET', $url, $options );
95 * Simple wrapper for Http::request( 'POST' )
96 * @see Http::request()
99 * @param $options array
102 public static function post( $url, $options = array() ) {
103 return Http
::request( 'POST', $url, $options );
107 * Check if the URL can be served by localhost
109 * @param string $url full url to check
112 public static function isLocalURL( $url ) {
113 global $wgCommandLineMode, $wgConf;
115 if ( $wgCommandLineMode ) {
121 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
124 $domainParts = explode( '.', $host );
125 // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
126 $domainParts = array_reverse( $domainParts );
129 for ( $i = 0; $i < count( $domainParts ); $i++
) {
130 $domainPart = $domainParts[$i];
132 $domain = $domainPart;
134 $domain = $domainPart . '.' . $domain;
137 if ( $wgConf->isLocalVHost( $domain ) ) {
147 * A standard user-agent we can use for external requests.
150 public static function userAgent() {
152 return "MediaWiki/$wgVersion";
156 * Checks that the given URI is a valid one. Hardcoding the
157 * protocols, because we only want protocols that both cURL
160 * file:// should not be allowed here for security purpose (r67684)
162 * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
164 * @param $uri Mixed: URI to check for validity
167 public static function isValidURI( $uri ) {
169 '/^https?:\/\/[^\/\s]\S*$/D',
176 * This wrapper class will call out to curl (if available) or fallback
177 * to regular PHP if necessary for handling internal HTTP requests.
179 * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
180 * PHP's HTTP extension.
182 class MWHttpRequest
{
183 const SUPPORTS_FILE_POSTS
= false;
186 protected $timeout = 'default';
187 protected $headersOnly = null;
188 protected $postData = null;
189 protected $proxy = null;
190 protected $noProxy = false;
191 protected $sslVerifyHost = true;
192 protected $sslVerifyCert = true;
193 protected $caInfo = null;
194 protected $method = "GET";
195 protected $reqHeaders = array();
197 protected $parsedUrl;
199 protected $maxRedirects = 5;
200 protected $followRedirects = false;
205 protected $cookieJar;
207 protected $headerList = array();
208 protected $respVersion = "0.9";
209 protected $respStatus = "200 Ok";
210 protected $respHeaders = array();
215 * @param string $url url to use. If protocol-relative, will be expanded to an http:// URL
216 * @param array $options (optional) extra params to pass (see Http::request())
218 protected function __construct( $url, $options = array() ) {
219 global $wgHTTPTimeout;
221 $this->url
= wfExpandUrl( $url, PROTO_HTTP
);
222 $this->parsedUrl
= wfParseUrl( $this->url
);
224 if ( !$this->parsedUrl ||
!Http
::isValidURI( $this->url
) ) {
225 $this->status
= Status
::newFatal( 'http-invalid-url' );
227 $this->status
= Status
::newGood( 100 ); // continue
230 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
231 $this->timeout
= $options['timeout'];
233 $this->timeout
= $wgHTTPTimeout;
235 if( isset( $options['userAgent'] ) ) {
236 $this->setUserAgent( $options['userAgent'] );
239 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
240 "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
242 foreach ( $members as $o ) {
243 if ( isset( $options[$o] ) ) {
244 // ensure that MWHttpRequest::method is always
245 // uppercased. Bug 36137
246 if ( $o == 'method' ) {
247 $options[$o] = strtoupper( $options[$o] );
249 $this->$o = $options[$o];
253 if ( $this->noProxy
) {
254 $this->proxy
= ''; // noProxy takes precedence
259 * Simple function to test if we can make any sort of requests at all, using
263 public static function canMakeRequests() {
264 return function_exists( 'curl_init' ) ||
wfIniGetBool( 'allow_url_fopen' );
268 * Generate a new request object
269 * @param string $url url to use
270 * @param array $options (optional) extra params to pass (see Http::request())
271 * @throws MWException
272 * @return CurlHttpRequest|PhpHttpRequest
273 * @see MWHttpRequest::__construct
275 public static function factory( $url, $options = null ) {
276 if ( !Http
::$httpEngine ) {
277 Http
::$httpEngine = function_exists( 'curl_init' ) ?
'curl' : 'php';
278 } elseif ( Http
::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
279 throw new MWException( __METHOD__
. ': curl (http://php.net/curl) is not installed, but' .
280 ' Http::$httpEngine is set to "curl"' );
283 switch( Http
::$httpEngine ) {
285 return new CurlHttpRequest( $url, $options );
287 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
288 throw new MWException( __METHOD__
. ': allow_url_fopen needs to be enabled for pure PHP' .
289 ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
291 return new PhpHttpRequest( $url, $options );
293 throw new MWException( __METHOD__
. ': The setting of Http::$httpEngine is not valid.' );
298 * Get the body, or content, of the response to the request
302 public function getContent() {
303 return $this->content
;
307 * Set the parameters of the request
310 * @todo overload the args param
312 public function setData( $args ) {
313 $this->postData
= $args;
317 * Take care of setting up the proxy (do nothing if "noProxy" is set)
321 public function proxySetup() {
324 // If there is an explicit proxy set and proxies are not disabled, then use it
325 if ( $this->proxy
&& !$this->noProxy
) {
329 // Otherwise, fallback to $wgHTTPProxy/http_proxy (when set) if this is not a machine
330 // local URL and proxies are not disabled
331 if ( Http
::isLocalURL( $this->url
) ||
$this->noProxy
) {
333 } elseif ( $wgHTTPProxy ) {
334 $this->proxy
= $wgHTTPProxy;
335 } elseif ( getenv( "http_proxy" ) ) {
336 $this->proxy
= getenv( "http_proxy" );
341 * Set the referrer header
343 public function setReferer( $url ) {
344 $this->setHeader( 'Referer', $url );
351 public function setUserAgent( $UA ) {
352 $this->setHeader( 'User-Agent', $UA );
356 * Set an arbitrary header
360 public function setHeader( $name, $value ) {
361 // I feel like I should normalize the case here...
362 $this->reqHeaders
[$name] = $value;
366 * Get an array of the headers
369 public function getHeaderList() {
372 if ( $this->cookieJar
) {
373 $this->reqHeaders
['Cookie'] =
374 $this->cookieJar
->serializeToHttpRequest(
375 $this->parsedUrl
['path'],
376 $this->parsedUrl
['host']
380 foreach ( $this->reqHeaders
as $name => $value ) {
381 $list[] = "$name: $value";
388 * Set a read callback to accept data read from the HTTP request.
389 * By default, data is appended to an internal buffer which can be
390 * retrieved through $req->getContent().
392 * To handle data as it comes in -- especially for large files that
393 * would not fit in memory -- you can instead set your own callback,
394 * in the form function($resource, $buffer) where the first parameter
395 * is the low-level resource being read (implementation specific),
396 * and the second parameter is the data buffer.
398 * You MUST return the number of bytes handled in the buffer; if fewer
399 * bytes are reported handled than were passed to you, the HTTP fetch
402 * @param $callback Callback
403 * @throws MWException
405 public function setCallback( $callback ) {
406 if ( !is_callable( $callback ) ) {
407 throw new MWException( 'Invalid MwHttpRequest callback' );
409 $this->callback
= $callback;
413 * A generic callback to read the body of the response from a remote
417 * @param $content String
420 public function read( $fh, $content ) {
421 $this->content
.= $content;
422 return strlen( $content );
426 * Take care of whatever is necessary to perform the URI request.
430 public function execute() {
433 wfProfileIn( __METHOD__
);
437 if ( strtoupper( $this->method
) == "HEAD" ) {
438 $this->headersOnly
= true;
441 if ( is_object( $wgTitle ) && !isset( $this->reqHeaders
['Referer'] ) ) {
442 $this->setReferer( wfExpandUrl( $wgTitle->getFullURL(), PROTO_CURRENT
) );
445 $this->proxySetup(); // set up any proxy as needed
447 if ( !$this->callback
) {
448 $this->setCallback( array( $this, 'read' ) );
451 if ( !isset( $this->reqHeaders
['User-Agent'] ) ) {
452 $this->setUserAgent( Http
::userAgent() );
455 wfProfileOut( __METHOD__
);
459 * Parses the headers, including the HTTP status code and any
460 * Set-Cookie headers. This function expects the headers to be
461 * found in an array in the member variable headerList.
463 protected function parseHeader() {
464 wfProfileIn( __METHOD__
);
468 foreach ( $this->headerList
as $header ) {
469 if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
470 $this->respVersion
= $match[1];
471 $this->respStatus
= $match[2];
472 } elseif ( preg_match( "#^[ \t]#", $header ) ) {
473 $last = count( $this->respHeaders
[$lastname] ) - 1;
474 $this->respHeaders
[$lastname][$last] .= "\r\n$header";
475 } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
476 $this->respHeaders
[strtolower( $match[1] )][] = $match[2];
477 $lastname = strtolower( $match[1] );
481 $this->parseCookies();
483 wfProfileOut( __METHOD__
);
487 * Sets HTTPRequest status member to a fatal value with the error
488 * message if the returned integer value of the status code was
489 * not successful (< 300) or a redirect (>=300 and < 400). (see
490 * RFC2616, section 10,
491 * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
492 * list of status codes.)
494 protected function setStatus() {
495 if ( !$this->respHeaders
) {
496 $this->parseHeader();
499 if ( (int)$this->respStatus
> 399 ) {
500 list( $code, $message ) = explode( " ", $this->respStatus
, 2 );
501 $this->status
->fatal( "http-bad-status", $code, $message );
506 * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
507 * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
508 * for a list of status codes.)
512 public function getStatus() {
513 if ( !$this->respHeaders
) {
514 $this->parseHeader();
517 return (int)$this->respStatus
;
521 * Returns true if the last status code was a redirect.
525 public function isRedirect() {
526 if ( !$this->respHeaders
) {
527 $this->parseHeader();
530 $status = (int)$this->respStatus
;
532 if ( $status >= 300 && $status <= 303 ) {
540 * Returns an associative array of response headers after the
541 * request has been executed. Because some headers
542 * (e.g. Set-Cookie) can appear more than once the, each value of
543 * the associative array is an array of the values given.
547 public function getResponseHeaders() {
548 if ( !$this->respHeaders
) {
549 $this->parseHeader();
552 return $this->respHeaders
;
556 * Returns the value of the given response header.
558 * @param $header String
561 public function getResponseHeader( $header ) {
562 if ( !$this->respHeaders
) {
563 $this->parseHeader();
566 if ( isset( $this->respHeaders
[strtolower( $header )] ) ) {
567 $v = $this->respHeaders
[strtolower( $header )];
568 return $v[count( $v ) - 1];
575 * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
577 * @param $jar CookieJar
579 public function setCookieJar( $jar ) {
580 $this->cookieJar
= $jar;
584 * Returns the cookie jar in use.
588 public function getCookieJar() {
589 if ( !$this->respHeaders
) {
590 $this->parseHeader();
593 return $this->cookieJar
;
597 * Sets a cookie. Used before a request to set up any individual
598 * cookies. Used internally after a request to parse the
599 * Set-Cookie headers.
605 public function setCookie( $name, $value = null, $attr = null ) {
606 if ( !$this->cookieJar
) {
607 $this->cookieJar
= new CookieJar
;
610 $this->cookieJar
->setCookie( $name, $value, $attr );
614 * Parse the cookies in the response headers and store them in the cookie jar.
616 protected function parseCookies() {
617 wfProfileIn( __METHOD__
);
619 if ( !$this->cookieJar
) {
620 $this->cookieJar
= new CookieJar
;
623 if ( isset( $this->respHeaders
['set-cookie'] ) ) {
624 $url = parse_url( $this->getFinalUrl() );
625 foreach ( $this->respHeaders
['set-cookie'] as $cookie ) {
626 $this->cookieJar
->parseCookieResponseHeader( $cookie, $url['host'] );
630 wfProfileOut( __METHOD__
);
634 * Returns the final URL after all redirections.
636 * Relative values of the "Location" header are incorrect as stated in RFC, however they do happen and modern browsers support them.
637 * This function loops backwards through all locations in order to build the proper absolute URI - Marooned at wikia-inc.com
639 * Note that the multiple Location: headers are an artifact of CURL -- they
640 * shouldn't actually get returned this way. Rewrite this when bug 29232 is
641 * taken care of (high-level redirect handling rewrite).
645 public function getFinalUrl() {
646 $headers = $this->getResponseHeaders();
648 //return full url (fix for incorrect but handled relative location)
649 if ( isset( $headers['location'] ) ) {
650 $locations = $headers['location'];
652 $foundRelativeURI = false;
653 $countLocations = count( $locations );
655 for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
656 $url = parse_url( $locations[$i] );
658 if ( isset( $url['host'] ) ) {
659 $domain = $url['scheme'] . '://' . $url['host'];
660 break; //found correct URI (with host)
662 $foundRelativeURI = true;
666 if ( $foundRelativeURI ) {
668 return $domain . $locations[$countLocations - 1];
670 $url = parse_url( $this->url
);
671 if ( isset( $url['host'] ) ) {
672 return $url['scheme'] . '://' . $url['host'] . $locations[$countLocations - 1];
676 return $locations[$countLocations - 1];
684 * Returns true if the backend can follow redirects. Overridden by the
688 public function canFollowRedirects() {
694 * MWHttpRequest implemented using internal curl compiled into PHP
696 class CurlHttpRequest
extends MWHttpRequest
{
697 const SUPPORTS_FILE_POSTS
= true;
699 static $curlMessageMap = array(
700 6 => 'http-host-unreachable',
701 28 => 'http-timed-out'
704 protected $curlOptions = array();
705 protected $headerText = "";
712 protected function readHeader( $fh, $content ) {
713 $this->headerText
.= $content;
714 return strlen( $content );
717 public function execute() {
718 wfProfileIn( __METHOD__
);
722 if ( !$this->status
->isOK() ) {
723 wfProfileOut( __METHOD__
);
724 return $this->status
;
727 $this->curlOptions
[CURLOPT_PROXY
] = $this->proxy
;
728 $this->curlOptions
[CURLOPT_TIMEOUT
] = $this->timeout
;
729 $this->curlOptions
[CURLOPT_HTTP_VERSION
] = CURL_HTTP_VERSION_1_0
;
730 $this->curlOptions
[CURLOPT_WRITEFUNCTION
] = $this->callback
;
731 $this->curlOptions
[CURLOPT_HEADERFUNCTION
] = array( $this, "readHeader" );
732 $this->curlOptions
[CURLOPT_MAXREDIRS
] = $this->maxRedirects
;
733 $this->curlOptions
[CURLOPT_ENCODING
] = ""; # Enable compression
735 /* not sure these two are actually necessary */
736 if ( isset( $this->reqHeaders
['Referer'] ) ) {
737 $this->curlOptions
[CURLOPT_REFERER
] = $this->reqHeaders
['Referer'];
739 $this->curlOptions
[CURLOPT_USERAGENT
] = $this->reqHeaders
['User-Agent'];
741 $this->curlOptions
[CURLOPT_SSL_VERIFYHOST
] = $this->sslVerifyHost ?
2 : 0;
742 $this->curlOptions
[CURLOPT_SSL_VERIFYPEER
] = $this->sslVerifyCert
;
744 if ( $this->caInfo
) {
745 $this->curlOptions
[CURLOPT_CAINFO
] = $this->caInfo
;
748 if ( $this->headersOnly
) {
749 $this->curlOptions
[CURLOPT_NOBODY
] = true;
750 $this->curlOptions
[CURLOPT_HEADER
] = true;
751 } elseif ( $this->method
== 'POST' ) {
752 $this->curlOptions
[CURLOPT_POST
] = true;
753 $this->curlOptions
[CURLOPT_POSTFIELDS
] = $this->postData
;
754 // Suppress 'Expect: 100-continue' header, as some servers
755 // will reject it with a 417 and Curl won't auto retry
756 // with HTTP 1.0 fallback
757 $this->reqHeaders
['Expect'] = '';
759 $this->curlOptions
[CURLOPT_CUSTOMREQUEST
] = $this->method
;
762 $this->curlOptions
[CURLOPT_HTTPHEADER
] = $this->getHeaderList();
764 $curlHandle = curl_init( $this->url
);
766 if ( !curl_setopt_array( $curlHandle, $this->curlOptions
) ) {
767 wfProfileOut( __METHOD__
);
768 throw new MWException( "Error setting curl options." );
771 if ( $this->followRedirects
&& $this->canFollowRedirects() ) {
772 wfSuppressWarnings();
773 if ( ! curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION
, true ) ) {
774 wfDebug( __METHOD__
. ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
775 "Probably safe_mode or open_basedir is set.\n" );
776 // Continue the processing. If it were in curl_setopt_array,
777 // processing would have halted on its entry
782 if ( false === curl_exec( $curlHandle ) ) {
783 $code = curl_error( $curlHandle );
785 if ( isset( self
::$curlMessageMap[$code] ) ) {
786 $this->status
->fatal( self
::$curlMessageMap[$code] );
788 $this->status
->fatal( 'http-curl-error', curl_error( $curlHandle ) );
791 $this->headerList
= explode( "\r\n", $this->headerText
);
794 curl_close( $curlHandle );
796 $this->parseHeader();
799 wfProfileOut( __METHOD__
);
801 return $this->status
;
807 public function canFollowRedirects() {
808 if ( strval( ini_get( 'open_basedir' ) ) !== '' ||
wfIniGetBool( 'safe_mode' ) ) {
809 wfDebug( "Cannot follow redirects in safe mode\n" );
813 if ( !defined( 'CURLOPT_REDIR_PROTOCOLS' ) ) {
814 wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
822 class PhpHttpRequest
extends MWHttpRequest
{
828 protected function urlToTcp( $url ) {
829 $parsedUrl = parse_url( $url );
831 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
834 public function execute() {
835 wfProfileIn( __METHOD__
);
839 if ( is_array( $this->postData
) ) {
840 $this->postData
= wfArrayToCgi( $this->postData
);
843 if ( $this->parsedUrl
['scheme'] != 'http' &&
844 $this->parsedUrl
['scheme'] != 'https' ) {
845 $this->status
->fatal( 'http-invalid-scheme', $this->parsedUrl
['scheme'] );
848 $this->reqHeaders
['Accept'] = "*/*";
849 if ( $this->method
== 'POST' ) {
850 // Required for HTTP 1.0 POSTs
851 $this->reqHeaders
['Content-Length'] = strlen( $this->postData
);
852 if( !isset( $this->reqHeaders
['Content-Type'] ) ) {
853 $this->reqHeaders
['Content-Type'] = "application/x-www-form-urlencoded";
858 if ( $this->proxy
) {
859 $options['proxy'] = $this->urlToTCP( $this->proxy
);
860 $options['request_fulluri'] = true;
863 if ( !$this->followRedirects
) {
864 $options['max_redirects'] = 0;
866 $options['max_redirects'] = $this->maxRedirects
;
869 $options['method'] = $this->method
;
870 $options['header'] = implode( "\r\n", $this->getHeaderList() );
871 // Note that at some future point we may want to support
872 // HTTP/1.1, but we'd have to write support for chunking
873 // in version of PHP < 5.3.1
874 $options['protocol_version'] = "1.0";
876 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
877 // Only works on 5.2.10+
878 $options['ignore_errors'] = true;
880 if ( $this->postData
) {
881 $options['content'] = $this->postData
;
884 $options['timeout'] = $this->timeout
;
886 $context = stream_context_create( array( 'http' => $options ) );
888 $this->headerList
= array();
896 wfSuppressWarnings();
897 $fh = fopen( $url, "r", false, $context );
904 $result = stream_get_meta_data( $fh );
905 $this->headerList
= $result['wrapper_data'];
906 $this->parseHeader();
908 if ( !$this->followRedirects
) {
912 # Handle manual redirection
913 if ( !$this->isRedirect() ||
$reqCount > $this->maxRedirects
) {
916 # Check security of URL
917 $url = $this->getResponseHeader( "Location" );
919 if ( !Http
::isValidURI( $url ) ) {
920 wfDebug( __METHOD__
. ": insecure redirection\n" );
927 if ( $fh === false ) {
928 $this->status
->fatal( 'http-request-error' );
929 wfProfileOut( __METHOD__
);
930 return $this->status
;
933 if ( $result['timed_out'] ) {
934 $this->status
->fatal( 'http-timed-out', $this->url
);
935 wfProfileOut( __METHOD__
);
936 return $this->status
;
939 // If everything went OK, or we received some error code
940 // get the response body content.
941 if ( $this->status
->isOK() ||
(int)$this->respStatus
>= 300 ) {
942 while ( !feof( $fh ) ) {
943 $buf = fread( $fh, 8192 );
945 if ( $buf === false ) {
946 $this->status
->fatal( 'http-read-error' );
950 if ( strlen( $buf ) ) {
951 call_user_func( $this->callback
, $fh, $buf );
957 wfProfileOut( __METHOD__
);
959 return $this->status
;