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<?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 {
public const SUPPORTS_FILE_POSTS = true;
protected $curlOptions = [];
protected $headerText = "";
/**
* @internal Use HttpRequestFactory
* @throws RuntimeException
*/
public function __construct() {
if ( !function_exists( 'curl_init' ) ) {
throw new RuntimeException(
__METHOD__ . ': curl (https://www.php.net/curl) is not installed' );
}
parent::__construct( ...func_get_args() );
}
/**
* @param resource $fh
* @param string $content
* @return int
*/
protected function readHeader( $fh, $content ) {
$this->headerText .= $content;
return strlen( $content );
}
/**
* @see MWHttpRequest::execute
*
* @throws MWException
* @return Status
*/
public function execute() {
$this->prepare();
if ( !$this->status->isOK() ) {
return Status::wrap( $this->status ); // TODO B/C; move this to callers
}
$this->curlOptions[CURLOPT_PROXY] = $this->proxy;
$this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
$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).
$this->curlOptions[CURLOPT_SAFE_UPLOAD] = true;
$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 ) ) {
$this->status->fatal( 'http-internal-error' );
throw new InvalidArgumentException( "Error setting curl options." );
}
if ( $this->followRedirects && $this->canFollowRedirects() ) {
Wikimedia\suppressWarnings();
if ( !curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
$this->logger->debug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
"Probably open_basedir is set." );
// Continue the processing. If it were in curl_setopt_array,
// processing would have halted on its entry
}
Wikimedia\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 Status::wrap( $this->status ); // TODO B/C; move this to callers
}
/**
* @return bool
*/
public function canFollowRedirects() {
$curlVersionInfo = curl_version();
if ( $curlVersionInfo['version_number'] < 0x071304 ) {
$this->logger->debug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037" );
return false;
}
return true;
}
}
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