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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
*/
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 ) ) {
$this->logger->debug( __METHOD__ . ": insecure redirection\n" );
break;
}
} while ( true );
if ( $this->profiler ) {
$this->profiler->scopedProfileOut( $profileSection );
}
$this->setStatus();
if ( $fh === false ) {
if ( $this->fopenErrors ) {
$this->logger->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;
}
}