HttpTest.php

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<?php

class HttpTest extends MediaWikiTestCase {
    public function testValidateCookieDomain( $expected, $domain, $origin = null ) {
        if ( $origin ) {
            $ok = Cookie::validateCookieDomain( $domain, $origin );
            $msg = "$domain against origin $origin";
        } else {
            $ok = Cookie::validateCookieDomain( $domain );
            $msg = "$domain";
        }
        $this->assertEquals( $expected, $ok, $msg );
    }

    public static function cookieDomains() {
        return [
            [ false, "org" ],
            [ false, ".org" ],
            [ true, "wikipedia.org" ],
            [ true, ".wikipedia.org" ],
            [ false, "co.uk" ],
            [ false, ".co.uk" ],
            [ false, "gov.uk" ],
            [ false, ".gov.uk" ],
            [ true, "supermarket.uk" ],
            [ false, "uk" ],
            [ false, ".uk" ],
            [ false, "127.0.0." ],
            [ false, "127." ],
            [ false, "127.0.0.1." ],
            [ true, "127.0.0.1" ],
            [ false, "333.0.0.1" ],
            [ true, "example.com" ],
            [ false, "example.com." ],
            [ true, ".example.com" ],

            [ true, ".example.com", "www.example.com" ],
            [ false, "example.com", "www.example.com" ],
            [ true, "127.0.0.1", "127.0.0.1" ],
            [ false, "127.0.0.1", "localhost" ],
        ];
    }

    public function testIsValidUri( $expect, $URI, $message = '' ) {
        $this->assertEquals(
            $expect,
            (bool)Http::isValidURI( $URI ),
            $message
        );
    }

    public function testGetProxy() {
        $this->setMwGlobals( 'wgHTTPProxy', 'proxy.domain.tld' );
        $this->assertEquals(
            'proxy.domain.tld',
            Http::getProxy()
        );
    }

    public static function provideURI() {
        return [
            [ false, '¿non sens before!! http://a', 'Allow anything before URI' ],

            # (http|https) - only two schemes allowed
            [ true, 'http://www.example.org/' ],
            [ true, 'https://www.example.org/' ],
            [ true, 'http://www.example.org', 'URI without directory' ],
            [ true, 'http://a', 'Short name' ],
            [ true, 'http://étoile', 'Allow UTF-8 in hostname' ], # 'étoile' is french for 'star'
            [ false, '\\host\directory', 'CIFS share' ],
            [ false, 'gopher://host/dir', 'Reject gopher scheme' ],
            [ false, 'telnet://host', 'Reject telnet scheme' ],

            # :\/\/ - double slashes
            [ false, 'http//example.org', 'Reject missing colon in protocol' ],
            [ false, 'http:/example.org', 'Reject missing slash in protocol' ],
            [ false, 'http:example.org', 'Must have two slashes' ],
            # Following fail since hostname can be made of anything
            [ false, 'http:///example.org', 'Must have exactly two slashes, not three' ],

            # (\w+:{0,1}\w*@)? - optional user:pass
            [ true, 'http://user@host', 'Username provided' ],
            [ true, 'http://user:@host', 'Username provided, no password' ],
            [ true, 'http://user:pass@host', 'Username and password provided' ],

            # (\S+) - host part is made of anything not whitespaces
            // commented these out in order to remove @group Broken
            // @todo are these valid tests? if so, fix Http::isValidURI so it can handle them
            // [ false, 'http://!"èèè¿¿¿~~\'', 'hostname is made of any non whitespace' ],
            // [ false, 'http://exam:ple.org/', 'hostname can not use colons!' ],

            # (:[0-9]+)? - port number
            [ true, 'http://example.org:80/' ],
            [ true, 'https://example.org:80/' ],
            [ true, 'http://example.org:443/' ],
            [ true, 'https://example.org:443/' ],

            # Part after the hostname is / or / with something else
            [ true, 'http://example/#' ],
            [ true, 'http://example/!' ],
            [ true, 'http://example/:' ],
            [ true, 'http://example/.' ],
            [ true, 'http://example/?' ],
            [ true, 'http://example/+' ],
            [ true, 'http://example/=' ],
            [ true, 'http://example/&' ],
            [ true, 'http://example/%' ],
            [ true, 'http://example/@' ],
            [ true, 'http://example/-' ],
            [ true, 'http://example//' ],
            [ true, 'http://example/&' ],

            # Fragment
            [ true, 'http://exam#ple.org', ], # This one is valid, really!
            [ true, 'http://example.org:80#anchor' ],
            [ true, 'http://example.org/?id#anchor' ],
            [ true, 'http://example.org/?#anchor' ],

            [ false, 'http://a ¿non !!sens after', 'Allow anything after URI' ],
        ];
    }

    public function testRelativeRedirections() {
        $h = MWHttpRequestTester::factory( 'http://oldsite/file.ext', [], __METHOD__ );

        # Forge a Location header
        $h->setRespHeaders( 'location', [
                'http://newsite/file.ext',
                '/newfile.ext',
            ]
        );
        # Verify we correctly fix the Location
        $this->assertEquals(
            'http://newsite/newfile.ext',
            $h->getFinalUrl(),
            "Relative file path Location: interpreted as full URL"
        );

        $h->setRespHeaders( 'location', [
                'https://oldsite/file.ext'
            ]
        );
        $this->assertEquals(
            'https://oldsite/file.ext',
            $h->getFinalUrl(),
            "Location to the HTTPS version of the site"
        );

        $h->setRespHeaders( 'location', [
                '/anotherfile.ext',
                'http://anotherfile/hoster.ext',
                'https://anotherfile/hoster.ext'
            ]
        );
        $this->assertEquals(
            'https://anotherfile/hoster.ext',
            $h->getFinalUrl( "Relative file path Location: should keep the latest host and scheme!" )
        );
    }

    public function provideCurlConstants() {
        return [
            [ 'CURLAUTH_ANY' ],
            [ 'CURLAUTH_ANYSAFE' ],
            [ 'CURLAUTH_BASIC' ],
            [ 'CURLAUTH_DIGEST' ],
            [ 'CURLAUTH_GSSNEGOTIATE' ],
            [ 'CURLAUTH_NTLM' ],
            // [ 'CURLCLOSEPOLICY_CALLBACK' ], // removed in PHP 5.6.0
            // [ 'CURLCLOSEPOLICY_LEAST_RECENTLY_USED' ], // removed in PHP 5.6.0
            // [ 'CURLCLOSEPOLICY_LEAST_TRAFFIC' ], // removed in PHP 5.6.0
            // [ 'CURLCLOSEPOLICY_OLDEST' ], // removed in PHP 5.6.0
            // [ 'CURLCLOSEPOLICY_SLOWEST' ], // removed in PHP 5.6.0
            [ 'CURLE_ABORTED_BY_CALLBACK' ],
            [ 'CURLE_BAD_CALLING_ORDER' ],
            [ 'CURLE_BAD_CONTENT_ENCODING' ],
            [ 'CURLE_BAD_FUNCTION_ARGUMENT' ],
            [ 'CURLE_BAD_PASSWORD_ENTERED' ],
            [ 'CURLE_COULDNT_CONNECT' ],
            [ 'CURLE_COULDNT_RESOLVE_HOST' ],
            [ 'CURLE_COULDNT_RESOLVE_PROXY' ],
            [ 'CURLE_FAILED_INIT' ],
            [ 'CURLE_FILESIZE_EXCEEDED' ],
            [ 'CURLE_FILE_COULDNT_READ_FILE' ],
            [ 'CURLE_FTP_ACCESS_DENIED' ],
            [ 'CURLE_FTP_BAD_DOWNLOAD_RESUME' ],
            [ 'CURLE_FTP_CANT_GET_HOST' ],
            [ 'CURLE_FTP_CANT_RECONNECT' ],
            [ 'CURLE_FTP_COULDNT_GET_SIZE' ],
            [ 'CURLE_FTP_COULDNT_RETR_FILE' ],
            [ 'CURLE_FTP_COULDNT_SET_ASCII' ],
            [ 'CURLE_FTP_COULDNT_SET_BINARY' ],
            [ 'CURLE_FTP_COULDNT_STOR_FILE' ],
            [ 'CURLE_FTP_COULDNT_USE_REST' ],
            [ 'CURLE_FTP_PORT_FAILED' ],
            [ 'CURLE_FTP_QUOTE_ERROR' ],
            [ 'CURLE_FTP_SSL_FAILED' ],
            [ 'CURLE_FTP_USER_PASSWORD_INCORRECT' ],
            [ 'CURLE_FTP_WEIRD_227_FORMAT' ],
            [ 'CURLE_FTP_WEIRD_PASS_REPLY' ],
            [ 'CURLE_FTP_WEIRD_PASV_REPLY' ],
            [ 'CURLE_FTP_WEIRD_SERVER_REPLY' ],
            [ 'CURLE_FTP_WEIRD_USER_REPLY' ],
            [ 'CURLE_FTP_WRITE_ERROR' ],
            [ 'CURLE_FUNCTION_NOT_FOUND' ],
            [ 'CURLE_GOT_NOTHING' ],
            [ 'CURLE_HTTP_NOT_FOUND' ],
            [ 'CURLE_HTTP_PORT_FAILED' ],
            [ 'CURLE_HTTP_POST_ERROR' ],
            [ 'CURLE_HTTP_RANGE_ERROR' ],
            [ 'CURLE_LDAP_CANNOT_BIND' ],
            [ 'CURLE_LDAP_INVALID_URL' ],
            [ 'CURLE_LDAP_SEARCH_FAILED' ],
            [ 'CURLE_LIBRARY_NOT_FOUND' ],
            [ 'CURLE_MALFORMAT_USER' ],
            [ 'CURLE_OBSOLETE' ],
            [ 'CURLE_OK' ],
            [ 'CURLE_OPERATION_TIMEOUTED' ],
            [ 'CURLE_OUT_OF_MEMORY' ],
            [ 'CURLE_PARTIAL_FILE' ],
            [ 'CURLE_READ_ERROR' ],
            [ 'CURLE_RECV_ERROR' ],
            [ 'CURLE_SEND_ERROR' ],
            [ 'CURLE_SHARE_IN_USE' ],
            // [ 'CURLE_SSH' ], // not present in HHVM 3.3.0-dev
            [ 'CURLE_SSL_CACERT' ],
            [ 'CURLE_SSL_CERTPROBLEM' ],
            [ 'CURLE_SSL_CIPHER' ],
            [ 'CURLE_SSL_CONNECT_ERROR' ],
            [ 'CURLE_SSL_ENGINE_NOTFOUND' ],
            [ 'CURLE_SSL_ENGINE_SETFAILED' ],
            [ 'CURLE_SSL_PEER_CERTIFICATE' ],
            [ 'CURLE_TELNET_OPTION_SYNTAX' ],
            [ 'CURLE_TOO_MANY_REDIRECTS' ],
            [ 'CURLE_UNKNOWN_TELNET_OPTION' ],
            [ 'CURLE_UNSUPPORTED_PROTOCOL' ],
            [ 'CURLE_URL_MALFORMAT' ],
            [ 'CURLE_URL_MALFORMAT_USER' ],
            [ 'CURLE_WRITE_ERROR' ],
            [ 'CURLFTPAUTH_DEFAULT' ],
            [ 'CURLFTPAUTH_SSL' ],
            [ 'CURLFTPAUTH_TLS' ],
            // [ 'CURLFTPMETHOD_MULTICWD' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLFTPMETHOD_NOCWD' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLFTPMETHOD_SINGLECWD' ], // not present in HHVM 3.3.0-dev
            [ 'CURLFTPSSL_ALL' ],
            [ 'CURLFTPSSL_CONTROL' ],
            [ 'CURLFTPSSL_NONE' ],
            [ 'CURLFTPSSL_TRY' ],
            // [ 'CURLINFO_CERTINFO' ], // not present in HHVM 3.3.0-dev
            [ 'CURLINFO_CONNECT_TIME' ],
            [ 'CURLINFO_CONTENT_LENGTH_DOWNLOAD' ],
            [ 'CURLINFO_CONTENT_LENGTH_UPLOAD' ],
            [ 'CURLINFO_CONTENT_TYPE' ],
            [ 'CURLINFO_EFFECTIVE_URL' ],
            [ 'CURLINFO_FILETIME' ],
            [ 'CURLINFO_HEADER_OUT' ],
            [ 'CURLINFO_HEADER_SIZE' ],
            [ 'CURLINFO_HTTP_CODE' ],
            [ 'CURLINFO_NAMELOOKUP_TIME' ],
            [ 'CURLINFO_PRETRANSFER_TIME' ],
            [ 'CURLINFO_PRIVATE' ],
            [ 'CURLINFO_REDIRECT_COUNT' ],
            [ 'CURLINFO_REDIRECT_TIME' ],
            // [ 'CURLINFO_REDIRECT_URL' ], // not present in HHVM 3.3.0-dev
            [ 'CURLINFO_REQUEST_SIZE' ],
            [ 'CURLINFO_SIZE_DOWNLOAD' ],
            [ 'CURLINFO_SIZE_UPLOAD' ],
            [ 'CURLINFO_SPEED_DOWNLOAD' ],
            [ 'CURLINFO_SPEED_UPLOAD' ],
            [ 'CURLINFO_SSL_VERIFYRESULT' ],
            [ 'CURLINFO_STARTTRANSFER_TIME' ],
            [ 'CURLINFO_TOTAL_TIME' ],
            [ 'CURLMSG_DONE' ],
            [ 'CURLM_BAD_EASY_HANDLE' ],
            [ 'CURLM_BAD_HANDLE' ],
            [ 'CURLM_CALL_MULTI_PERFORM' ],
            [ 'CURLM_INTERNAL_ERROR' ],
            [ 'CURLM_OK' ],
            [ 'CURLM_OUT_OF_MEMORY' ],
            [ 'CURLOPT_AUTOREFERER' ],
            [ 'CURLOPT_BINARYTRANSFER' ],
            [ 'CURLOPT_BUFFERSIZE' ],
            [ 'CURLOPT_CAINFO' ],
            [ 'CURLOPT_CAPATH' ],
            // [ 'CURLOPT_CERTINFO' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_CLOSEPOLICY' ], // removed in PHP 5.6.0
            [ 'CURLOPT_CONNECTTIMEOUT' ],
            [ 'CURLOPT_CONNECTTIMEOUT_MS' ],
            [ 'CURLOPT_COOKIE' ],
            [ 'CURLOPT_COOKIEFILE' ],
            [ 'CURLOPT_COOKIEJAR' ],
            [ 'CURLOPT_COOKIESESSION' ],
            [ 'CURLOPT_CRLF' ],
            [ 'CURLOPT_CUSTOMREQUEST' ],
            [ 'CURLOPT_DNS_CACHE_TIMEOUT' ],
            [ 'CURLOPT_DNS_USE_GLOBAL_CACHE' ],
            [ 'CURLOPT_EGDSOCKET' ],
            [ 'CURLOPT_ENCODING' ],
            [ 'CURLOPT_FAILONERROR' ],
            [ 'CURLOPT_FILE' ],
            [ 'CURLOPT_FILETIME' ],
            [ 'CURLOPT_FOLLOWLOCATION' ],
            [ 'CURLOPT_FORBID_REUSE' ],
            [ 'CURLOPT_FRESH_CONNECT' ],
            [ 'CURLOPT_FTPAPPEND' ],
            [ 'CURLOPT_FTPLISTONLY' ],
            [ 'CURLOPT_FTPPORT' ],
            [ 'CURLOPT_FTPSSLAUTH' ],
            [ 'CURLOPT_FTP_CREATE_MISSING_DIRS' ],
            // [ 'CURLOPT_FTP_FILEMETHOD' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_FTP_SKIP_PASV_IP' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_FTP_SSL' ],
            [ 'CURLOPT_FTP_USE_EPRT' ],
            [ 'CURLOPT_FTP_USE_EPSV' ],
            [ 'CURLOPT_HEADER' ],
            [ 'CURLOPT_HEADERFUNCTION' ],
            [ 'CURLOPT_HTTP200ALIASES' ],
            [ 'CURLOPT_HTTPAUTH' ],
            [ 'CURLOPT_HTTPGET' ],
            [ 'CURLOPT_HTTPHEADER' ],
            [ 'CURLOPT_HTTPPROXYTUNNEL' ],
            [ 'CURLOPT_HTTP_VERSION' ],
            [ 'CURLOPT_INFILE' ],
            [ 'CURLOPT_INFILESIZE' ],
            [ 'CURLOPT_INTERFACE' ],
            [ 'CURLOPT_IPRESOLVE' ],
            // [ 'CURLOPT_KEYPASSWD' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_KRB4LEVEL' ],
            [ 'CURLOPT_LOW_SPEED_LIMIT' ],
            [ 'CURLOPT_LOW_SPEED_TIME' ],
            [ 'CURLOPT_MAXCONNECTS' ],
            [ 'CURLOPT_MAXREDIRS' ],
            // [ 'CURLOPT_MAX_RECV_SPEED_LARGE' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_MAX_SEND_SPEED_LARGE' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_NETRC' ],
            [ 'CURLOPT_NOBODY' ],
            [ 'CURLOPT_NOPROGRESS' ],
            [ 'CURLOPT_NOSIGNAL' ],
            [ 'CURLOPT_PORT' ],
            [ 'CURLOPT_POST' ],
            [ 'CURLOPT_POSTFIELDS' ],
            [ 'CURLOPT_POSTQUOTE' ],
            [ 'CURLOPT_POSTREDIR' ],
            [ 'CURLOPT_PRIVATE' ],
            [ 'CURLOPT_PROGRESSFUNCTION' ],
            // [ 'CURLOPT_PROTOCOLS' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_PROXY' ],
            [ 'CURLOPT_PROXYAUTH' ],
            [ 'CURLOPT_PROXYPORT' ],
            [ 'CURLOPT_PROXYTYPE' ],
            [ 'CURLOPT_PROXYUSERPWD' ],
            [ 'CURLOPT_PUT' ],
            [ 'CURLOPT_QUOTE' ],
            [ 'CURLOPT_RANDOM_FILE' ],
            [ 'CURLOPT_RANGE' ],
            [ 'CURLOPT_READDATA' ],
            [ 'CURLOPT_READFUNCTION' ],
            // [ 'CURLOPT_REDIR_PROTOCOLS' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_REFERER' ],
            [ 'CURLOPT_RESUME_FROM' ],
            [ 'CURLOPT_RETURNTRANSFER' ],
            // [ 'CURLOPT_SSH_AUTH_TYPES' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_SSH_HOST_PUBLIC_KEY_MD5' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_SSH_PRIVATE_KEYFILE' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLOPT_SSH_PUBLIC_KEYFILE' ], // not present in HHVM 3.3.0-dev
            [ 'CURLOPT_SSLCERT' ],
            [ 'CURLOPT_SSLCERTPASSWD' ],
            [ 'CURLOPT_SSLCERTTYPE' ],
            [ 'CURLOPT_SSLENGINE' ],
            [ 'CURLOPT_SSLENGINE_DEFAULT' ],
            [ 'CURLOPT_SSLKEY' ],
            [ 'CURLOPT_SSLKEYPASSWD' ],
            [ 'CURLOPT_SSLKEYTYPE' ],
            [ 'CURLOPT_SSLVERSION' ],
            [ 'CURLOPT_SSL_CIPHER_LIST' ],
            [ 'CURLOPT_SSL_VERIFYHOST' ],
            [ 'CURLOPT_SSL_VERIFYPEER' ],
            [ 'CURLOPT_STDERR' ],
            [ 'CURLOPT_TCP_NODELAY' ],
            [ 'CURLOPT_TIMECONDITION' ],
            [ 'CURLOPT_TIMEOUT' ],
            [ 'CURLOPT_TIMEOUT_MS' ],
            [ 'CURLOPT_TIMEVALUE' ],
            [ 'CURLOPT_TRANSFERTEXT' ],
            [ 'CURLOPT_UNRESTRICTED_AUTH' ],
            [ 'CURLOPT_UPLOAD' ],
            [ 'CURLOPT_URL' ],
            [ 'CURLOPT_USERAGENT' ],
            [ 'CURLOPT_USERPWD' ],
            [ 'CURLOPT_VERBOSE' ],
            [ 'CURLOPT_WRITEFUNCTION' ],
            [ 'CURLOPT_WRITEHEADER' ],
            // [ 'CURLPROTO_ALL' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_DICT' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_FILE' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_FTP' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_FTPS' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_HTTP' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_HTTPS' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_LDAP' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_LDAPS' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_SCP' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_SFTP' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_TELNET' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLPROTO_TFTP' ], // not present in HHVM 3.3.0-dev
            [ 'CURLPROXY_HTTP' ],
            // [ 'CURLPROXY_SOCKS4' ], // not present in HHVM 3.3.0-dev
            [ 'CURLPROXY_SOCKS5' ],
            // [ 'CURLSSH_AUTH_DEFAULT' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLSSH_AUTH_HOST' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLSSH_AUTH_KEYBOARD' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLSSH_AUTH_NONE' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLSSH_AUTH_PASSWORD' ], // not present in HHVM 3.3.0-dev
            // [ 'CURLSSH_AUTH_PUBLICKEY' ], // not present in HHVM 3.3.0-dev
            [ 'CURLVERSION_NOW' ],
            [ 'CURL_HTTP_VERSION_1_0' ],
            [ 'CURL_HTTP_VERSION_1_1' ],
            [ 'CURL_HTTP_VERSION_NONE' ],
            [ 'CURL_IPRESOLVE_V4' ],
            [ 'CURL_IPRESOLVE_V6' ],
            [ 'CURL_IPRESOLVE_WHATEVER' ],
            [ 'CURL_NETRC_IGNORED' ],
            [ 'CURL_NETRC_OPTIONAL' ],
            [ 'CURL_NETRC_REQUIRED' ],
            [ 'CURL_TIMECOND_IFMODSINCE' ],
            [ 'CURL_TIMECOND_IFUNMODSINCE' ],
            [ 'CURL_TIMECOND_LASTMOD' ],
            [ 'CURL_VERSION_IPV6' ],
            [ 'CURL_VERSION_KERBEROS4' ],
            [ 'CURL_VERSION_LIBZ' ],
            [ 'CURL_VERSION_SSL' ],
        ];
    }

    public function testCurlConstants( $value ) {
        $this->assertTrue( defined( $value ), $value . ' not defined' );
    }
}

class MWHttpRequestTester extends MWHttpRequest {
    // function derived from the MWHttpRequest factory function but
    // returns appropriate tester class here
    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 CurlHttpRequestTester( $url, $options, $caller );
            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 PhpHttpRequestTester( $url, $options, $caller );
            default:
        }
    }
}

class CurlHttpRequestTester extends CurlHttpRequest {
    function setRespHeaders( $name, $value ) {
        $this->respHeaders[$name] = $value;
    }
}

class PhpHttpRequestTester extends PhpHttpRequest {
    function setRespHeaders( $name, $value ) {
        $this->respHeaders[$name] = $value;
    }
}