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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
+ */
+
+use Psr\Log\LoggerInterface;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\NullLogger;
+
+/**
+ * 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.
+ */
+abstract class MWHttpRequest implements LoggerAwareInterface {
+ const SUPPORTS_FILE_POSTS = false;
+
+ /**
+ * @var int|string
+ */
+ protected $timeout = 'default';
+
+ protected $content;
+ 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;
+ /** @var callable */
+ protected $callback;
+ protected $maxRedirects = 5;
+ protected $followRedirects = false;
+ protected $connectTimeout;
+
+ /**
+ * @var CookieJar
+ */
+ protected $cookieJar;
+
+ protected $headerList = [];
+ protected $respVersion = "0.9";
+ protected $respStatus = "200 Ok";
+ protected $respHeaders = [];
+
+ /** @var StatusValue */
+ protected $status;
+
+ /**
+ * @var Profiler
+ */
+ protected $profiler;
+
+ /**
+ * @var string
+ */
+ protected $profileName;
+
+ /**
+ * @var LoggerInterface
+ */
+ protected $logger;
+
+ /**
+ * @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
+ */
+ public function __construct(
+ $url, array $options = [], $caller = __METHOD__, $profiler = null
+ ) {
+ global $wgHTTPTimeout, $wgHTTPConnectTimeout;
+
+ $this->url = wfExpandUrl( $url, PROTO_HTTP );
+ $this->parsedUrl = wfParseUrl( $this->url );
+
+ if ( isset( $options['logger'] ) ) {
+ $this->logger = $options['logger'];
+ } else {
+ $this->logger = new NullLogger();
+ }
+
+ if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
+ $this->status = StatusValue::newFatal( 'http-invalid-url', $url );
+ } else {
+ $this->status = StatusValue::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'] );
+ }
+ if ( isset( $options['username'] ) && isset( $options['password'] ) ) {
+ $this->setHeader(
+ 'Authorization',
+ 'Basic ' . base64_encode( $options['username'] . ':' . $options['password'] )
+ );
+ }
+ if ( isset( $options['originalRequest'] ) ) {
+ $this->setOriginalRequest( $options['originalRequest'] );
+ }
+
+ $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. T38137
+ 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;
+ }
+
+ /**
+ * @param LoggerInterface $logger
+ */
+ public function setLogger( LoggerInterface $logger ) {
+ $this->logger = $logger;
+ }
+
+ /**
+ * 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
+ * Deprecated: @see HttpRequestFactory::create
+ * @param string $url Url to use
+ * @param array|null $options (optional) extra params to pass (see Http::request())
+ * @param string $caller The method making this request, for profiling
+ * @throws DomainException
+ * @return MWHttpRequest
+ * @see MWHttpRequest::__construct
+ */
+ public static function factory( $url, array $options = null, $caller = __METHOD__ ) {
+ if ( $options === null ) {
+ $options = [];
+ }
+ return \MediaWiki\MediaWikiServices::getInstance()
+ ->getHttpRequestFactory()
+ ->create( $url, $options, $caller );
+ }
+
+ /**
+ * 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
+ */
+ protected 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
+ */
+ protected 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|null $callback
+ * @throws InvalidArgumentException
+ */
+ public function setCallback( $callback ) {
+ if ( is_null( $callback ) ) {
+ $callback = [ $this, 'read' ];
+ } elseif ( !is_callable( $callback ) ) {
+ throw new InvalidArgumentException( __METHOD__ . ': invalid 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
+ * @internal
+ */
+ public function read( $fh, $content ) {
+ $this->content .= $content;
+ return strlen( $content );
+ }
+
+ /**
+ * Take care of whatever is necessary to perform the URI request.
+ *
+ * @return StatusValue
+ * @note currently returns Status for B/C
+ */
+ public function execute() {
+ throw new LogicException( 'children must override this' );
+ }
+
+ protected function prepare() {
+ $this->content = "";
+
+ if ( strtoupper( $this->method ) == "HEAD" ) {
+ $this->headersOnly = true;
+ }
+
+ $this->proxySetup(); // set up any proxy as needed
+
+ if ( !$this->callback ) {
+ $this->setCallback( null );
+ }
+
+ 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.
+ *
+ * To read response cookies from the jar, getCookieJar must be called first.
+ *
+ * @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 string $value
+ * @param array $attr
+ */
+ public function setCookie( $name, $value, $attr = [] ) {
+ if ( !$this->cookieJar ) {
+ $this->cookieJar = new CookieJar;
+ }
+
+ if ( $this->parsedUrl && !isset( $attr['domain'] ) ) {
+ $attr['domain'] = $this->parsedUrl['host'];
+ }
+
+ $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 T31232 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 ) {
+ return $locations[$countLocations - 1];
+ }
+ if ( $domain ) {
+ return $domain . $locations[$countLocations - 1];
+ }
+ $url = parse_url( $this->url );
+ if ( isset( $url['host'] ) ) {
+ return $url['scheme'] . '://' . $url['host'] .
+ $locations[$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;
+ }
+
+ /**
+ * Set information about the original request. This can be useful for
+ * endpoints/API modules which act as a proxy for some service, and
+ * throttling etc. needs to happen in that service.
+ * Calling this will result in the X-Forwarded-For and X-Original-User-Agent
+ * headers being set.
+ * @param WebRequest|array $originalRequest When in array form, it's
+ * expected to have the keys 'ip' and 'userAgent'.
+ * @note IP/user agent is personally identifiable information, and should
+ * only be set when the privacy policy of the request target is
+ * compatible with that of the MediaWiki installation.
+ */
+ public function setOriginalRequest( $originalRequest ) {
+ if ( $originalRequest instanceof WebRequest ) {
+ $originalRequest = [
+ 'ip' => $originalRequest->getIP(),
+ 'userAgent' => $originalRequest->getHeader( 'User-Agent' ),
+ ];
+ } elseif (
+ !is_array( $originalRequest )
+ || array_diff( [ 'ip', 'userAgent' ], array_keys( $originalRequest ) )
+ ) {
+ throw new InvalidArgumentException( __METHOD__ . ': $originalRequest must be a '
+ . "WebRequest or an array with 'ip' and 'userAgent' keys" );
+ }
+
+ $this->reqHeaders['X-Forwarded-For'] = $originalRequest['ip'];
+ $this->reqHeaders['X-Original-User-Agent'] = $originalRequest['userAgent'];
+ }
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-04 23:45:50 +0000