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-rw-r--r--extlib/HTTP/Request2/Adapter/Socket.php1940
1 files changed, 970 insertions, 970 deletions
diff --git a/extlib/HTTP/Request2/Adapter/Socket.php b/extlib/HTTP/Request2/Adapter/Socket.php
index 13cd6136f..ff44d4959 100644
--- a/extlib/HTTP/Request2/Adapter/Socket.php
+++ b/extlib/HTTP/Request2/Adapter/Socket.php
@@ -1,971 +1,971 @@
-<?php
-/**
- * Socket-based adapter for HTTP_Request2
- *
- * PHP version 5
- *
- * LICENSE:
- *
- * Copyright (c) 2008, 2009, Alexey Borzov <avb@php.net>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * The names of the authors may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @category HTTP
- * @package HTTP_Request2
- * @author Alexey Borzov <avb@php.net>
- * @license http://opensource.org/licenses/bsd-license.php New BSD License
- * @version CVS: $Id: Socket.php 279760 2009-05-03 10:46:42Z avb $
- * @link http://pear.php.net/package/HTTP_Request2
- */
-
-/**
- * Base class for HTTP_Request2 adapters
- */
-require_once 'HTTP/Request2/Adapter.php';
-
-/**
- * Socket-based adapter for HTTP_Request2
- *
- * This adapter uses only PHP sockets and will work on almost any PHP
- * environment. Code is based on original HTTP_Request PEAR package.
- *
- * @category HTTP
- * @package HTTP_Request2
- * @author Alexey Borzov <avb@php.net>
- * @version Release: 0.4.1
- */
-class HTTP_Request2_Adapter_Socket extends HTTP_Request2_Adapter
-{
- /**
- * Regular expression for 'token' rule from RFC 2616
- */
- const REGEXP_TOKEN = '[^\x00-\x1f\x7f-\xff()<>@,;:\\\\"/\[\]?={}\s]+';
-
- /**
- * Regular expression for 'quoted-string' rule from RFC 2616
- */
- const REGEXP_QUOTED_STRING = '"(?:\\\\.|[^\\\\"])*"';
-
- /**
- * Connected sockets, needed for Keep-Alive support
- * @var array
- * @see connect()
- */
- protected static $sockets = array();
-
- /**
- * Data for digest authentication scheme
- *
- * The keys for the array are URL prefixes.
- *
- * The values are associative arrays with data (realm, nonce, nonce-count,
- * opaque...) needed for digest authentication. Stored here to prevent making
- * duplicate requests to digest-protected resources after we have already
- * received the challenge.
- *
- * @var array
- */
- protected static $challenges = array();
-
- /**
- * Connected socket
- * @var resource
- * @see connect()
- */
- protected $socket;
-
- /**
- * Challenge used for server digest authentication
- * @var array
- */
- protected $serverChallenge;
-
- /**
- * Challenge used for proxy digest authentication
- * @var array
- */
- protected $proxyChallenge;
-
- /**
- * Global timeout, exception will be raised if request continues past this time
- * @var integer
- */
- protected $timeout = null;
-
- /**
- * Remaining length of the current chunk, when reading chunked response
- * @var integer
- * @see readChunked()
- */
- protected $chunkLength = 0;
-
- /**
- * Sends request to the remote server and returns its response
- *
- * @param HTTP_Request2
- * @return HTTP_Request2_Response
- * @throws HTTP_Request2_Exception
- */
- public function sendRequest(HTTP_Request2 $request)
- {
- $this->request = $request;
- $keepAlive = $this->connect();
- $headers = $this->prepareHeaders();
-
- // Use global request timeout if given, see feature requests #5735, #8964
- if ($timeout = $request->getConfig('timeout')) {
- $this->timeout = time() + $timeout;
- } else {
- $this->timeout = null;
- }
-
- try {
- if (false === @fwrite($this->socket, $headers, strlen($headers))) {
- throw new HTTP_Request2_Exception('Error writing request');
- }
- // provide request headers to the observer, see request #7633
- $this->request->setLastEvent('sentHeaders', $headers);
- $this->writeBody();
-
- if ($this->timeout && time() > $this->timeout) {
- throw new HTTP_Request2_Exception(
- 'Request timed out after ' .
- $request->getConfig('timeout') . ' second(s)'
- );
- }
-
- $response = $this->readResponse();
-
- if (!$this->canKeepAlive($keepAlive, $response)) {
- $this->disconnect();
- }
-
- if ($this->shouldUseProxyDigestAuth($response)) {
- return $this->sendRequest($request);
- }
- if ($this->shouldUseServerDigestAuth($response)) {
- return $this->sendRequest($request);
- }
- if ($authInfo = $response->getHeader('authentication-info')) {
- $this->updateChallenge($this->serverChallenge, $authInfo);
- }
- if ($proxyInfo = $response->getHeader('proxy-authentication-info')) {
- $this->updateChallenge($this->proxyChallenge, $proxyInfo);
- }
-
- } catch (Exception $e) {
- $this->disconnect();
- throw $e;
- }
-
- return $response;
- }
-
- /**
- * Connects to the remote server
- *
- * @return bool whether the connection can be persistent
- * @throws HTTP_Request2_Exception
- */
- protected function connect()
- {
- $secure = 0 == strcasecmp($this->request->getUrl()->getScheme(), 'https');
- $tunnel = HTTP_Request2::METHOD_CONNECT == $this->request->getMethod();
- $headers = $this->request->getHeaders();
- $reqHost = $this->request->getUrl()->getHost();
- if (!($reqPort = $this->request->getUrl()->getPort())) {
- $reqPort = $secure? 443: 80;
- }
-
- if ($host = $this->request->getConfig('proxy_host')) {
- if (!($port = $this->request->getConfig('proxy_port'))) {
- throw new HTTP_Request2_Exception('Proxy port not provided');
- }
- $proxy = true;
- } else {
- $host = $reqHost;
- $port = $reqPort;
- $proxy = false;
- }
-
- if ($tunnel && !$proxy) {
- throw new HTTP_Request2_Exception(
- "Trying to perform CONNECT request without proxy"
- );
- }
- if ($secure && !in_array('ssl', stream_get_transports())) {
- throw new HTTP_Request2_Exception(
- 'Need OpenSSL support for https:// requests'
- );
- }
-
- // RFC 2068, section 19.7.1: A client MUST NOT send the Keep-Alive
- // connection token to a proxy server...
- if ($proxy && !$secure &&
- !empty($headers['connection']) && 'Keep-Alive' == $headers['connection']
- ) {
- $this->request->setHeader('connection');
- }
-
- $keepAlive = ('1.1' == $this->request->getConfig('protocol_version') &&
- empty($headers['connection'])) ||
- (!empty($headers['connection']) &&
- 'Keep-Alive' == $headers['connection']);
- $host = ((!$secure || $proxy)? 'tcp://': 'ssl://') . $host;
-
- $options = array();
- if ($secure || $tunnel) {
- foreach ($this->request->getConfig() as $name => $value) {
- if ('ssl_' == substr($name, 0, 4) && null !== $value) {
- if ('ssl_verify_host' == $name) {
- if ($value) {
- $options['CN_match'] = $reqHost;
- }
- } else {
- $options[substr($name, 4)] = $value;
- }
- }
- }
- ksort($options);
- }
-
- // Changing SSL context options after connection is established does *not*
- // work, we need a new connection if options change
- $remote = $host . ':' . $port;
- $socketKey = $remote . (($secure && $proxy)? "->{$reqHost}:{$reqPort}": '') .
- (empty($options)? '': ':' . serialize($options));
- unset($this->socket);
-
- // We use persistent connections and have a connected socket?
- // Ensure that the socket is still connected, see bug #16149
- if ($keepAlive && !empty(self::$sockets[$socketKey]) &&
- !feof(self::$sockets[$socketKey])
- ) {
- $this->socket =& self::$sockets[$socketKey];
-
- } elseif ($secure && $proxy && !$tunnel) {
- $this->establishTunnel();
- $this->request->setLastEvent(
- 'connect', "ssl://{$reqHost}:{$reqPort} via {$host}:{$port}"
- );
- self::$sockets[$socketKey] =& $this->socket;
-
- } else {
- // Set SSL context options if doing HTTPS request or creating a tunnel
- $context = stream_context_create();
- foreach ($options as $name => $value) {
- if (!stream_context_set_option($context, 'ssl', $name, $value)) {
- throw new HTTP_Request2_Exception(
- "Error setting SSL context option '{$name}'"
- );
- }
- }
- $this->socket = @stream_socket_client(
- $remote, $errno, $errstr,
- $this->request->getConfig('connect_timeout'),
- STREAM_CLIENT_CONNECT, $context
- );
- if (!$this->socket) {
- throw new HTTP_Request2_Exception(
- "Unable to connect to {$remote}. Error #{$errno}: {$errstr}"
- );
- }
- $this->request->setLastEvent('connect', $remote);
- self::$sockets[$socketKey] =& $this->socket;
- }
- return $keepAlive;
- }
-
- /**
- * Establishes a tunnel to a secure remote server via HTTP CONNECT request
- *
- * This method will fail if 'ssl_verify_peer' is enabled. Probably because PHP
- * sees that we are connected to a proxy server (duh!) rather than the server
- * that presents its certificate.
- *
- * @link http://tools.ietf.org/html/rfc2817#section-5.2
- * @throws HTTP_Request2_Exception
- */
- protected function establishTunnel()
- {
- $donor = new self;
- $connect = new HTTP_Request2(
- $this->request->getUrl(), HTTP_Request2::METHOD_CONNECT,
- array_merge($this->request->getConfig(),
- array('adapter' => $donor))
- );
- $response = $connect->send();
- // Need any successful (2XX) response
- if (200 > $response->getStatus() || 300 <= $response->getStatus()) {
- throw new HTTP_Request2_Exception(
- 'Failed to connect via HTTPS proxy. Proxy response: ' .
- $response->getStatus() . ' ' . $response->getReasonPhrase()
- );
- }
- $this->socket = $donor->socket;
-
- $modes = array(
- STREAM_CRYPTO_METHOD_TLS_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv3_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv23_CLIENT,
- STREAM_CRYPTO_METHOD_SSLv2_CLIENT
- );
-
- foreach ($modes as $mode) {
- if (stream_socket_enable_crypto($this->socket, true, $mode)) {
- return;
- }
- }
- throw new HTTP_Request2_Exception(
- 'Failed to enable secure connection when connecting through proxy'
- );
- }
-
- /**
- * Checks whether current connection may be reused or should be closed
- *
- * @param boolean whether connection could be persistent
- * in the first place
- * @param HTTP_Request2_Response response object to check
- * @return boolean
- */
- protected function canKeepAlive($requestKeepAlive, HTTP_Request2_Response $response)
- {
- // Do not close socket on successful CONNECT request
- if (HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() &&
- 200 <= $response->getStatus() && 300 > $response->getStatus()
- ) {
- return true;
- }
-
- $lengthKnown = 'chunked' == strtolower($response->getHeader('transfer-encoding')) ||
- null !== $response->getHeader('content-length');
- $persistent = 'keep-alive' == strtolower($response->getHeader('connection')) ||
- (null === $response->getHeader('connection') &&
- '1.1' == $response->getVersion());
- return $requestKeepAlive && $lengthKnown && $persistent;
- }
-
- /**
- * Disconnects from the remote server
- */
- protected function disconnect()
- {
- if (is_resource($this->socket)) {
- fclose($this->socket);
- $this->socket = null;
- $this->request->setLastEvent('disconnect');
- }
- }
-
- /**
- * Checks whether another request should be performed with server digest auth
- *
- * Several conditions should be satisfied for it to return true:
- * - response status should be 401
- * - auth credentials should be set in the request object
- * - response should contain WWW-Authenticate header with digest challenge
- * - there is either no challenge stored for this URL or new challenge
- * contains stale=true parameter (in other case we probably just failed
- * due to invalid username / password)
- *
- * The method stores challenge values in $challenges static property
- *
- * @param HTTP_Request2_Response response to check
- * @return boolean whether another request should be performed
- * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
- */
- protected function shouldUseServerDigestAuth(HTTP_Request2_Response $response)
- {
- // no sense repeating a request if we don't have credentials
- if (401 != $response->getStatus() || !$this->request->getAuth()) {
- return false;
- }
- if (!$challenge = $this->parseDigestChallenge($response->getHeader('www-authenticate'))) {
- return false;
- }
-
- $url = $this->request->getUrl();
- $scheme = $url->getScheme();
- $host = $scheme . '://' . $url->getHost();
- if ($port = $url->getPort()) {
- if ((0 == strcasecmp($scheme, 'http') && 80 != $port) ||
- (0 == strcasecmp($scheme, 'https') && 443 != $port)
- ) {
- $host .= ':' . $port;
- }
- }
-
- if (!empty($challenge['domain'])) {
- $prefixes = array();
- foreach (preg_split('/\\s+/', $challenge['domain']) as $prefix) {
- // don't bother with different servers
- if ('/' == substr($prefix, 0, 1)) {
- $prefixes[] = $host . $prefix;
- }
- }
- }
- if (empty($prefixes)) {
- $prefixes = array($host . '/');
- }
-
- $ret = true;
- foreach ($prefixes as $prefix) {
- if (!empty(self::$challenges[$prefix]) &&
- (empty($challenge['stale']) || strcasecmp('true', $challenge['stale']))
- ) {
- // probably credentials are invalid
- $ret = false;
- }
- self::$challenges[$prefix] =& $challenge;
- }
- return $ret;
- }
-
- /**
- * Checks whether another request should be performed with proxy digest auth
- *
- * Several conditions should be satisfied for it to return true:
- * - response status should be 407
- * - proxy auth credentials should be set in the request object
- * - response should contain Proxy-Authenticate header with digest challenge
- * - there is either no challenge stored for this proxy or new challenge
- * contains stale=true parameter (in other case we probably just failed
- * due to invalid username / password)
- *
- * The method stores challenge values in $challenges static property
- *
- * @param HTTP_Request2_Response response to check
- * @return boolean whether another request should be performed
- * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
- */
- protected function shouldUseProxyDigestAuth(HTTP_Request2_Response $response)
- {
- if (407 != $response->getStatus() || !$this->request->getConfig('proxy_user')) {
- return false;
- }
- if (!($challenge = $this->parseDigestChallenge($response->getHeader('proxy-authenticate')))) {
- return false;
- }
-
- $key = 'proxy://' . $this->request->getConfig('proxy_host') .
- ':' . $this->request->getConfig('proxy_port');
-
- if (!empty(self::$challenges[$key]) &&
- (empty($challenge['stale']) || strcasecmp('true', $challenge['stale']))
- ) {
- $ret = false;
- } else {
- $ret = true;
- }
- self::$challenges[$key] = $challenge;
- return $ret;
- }
-
- /**
- * Extracts digest method challenge from (WWW|Proxy)-Authenticate header value
- *
- * There is a problem with implementation of RFC 2617: several of the parameters
- * here are defined as quoted-string and thus may contain backslash escaped
- * double quotes (RFC 2616, section 2.2). However, RFC 2617 defines unq(X) as
- * just value of quoted-string X without surrounding quotes, it doesn't speak
- * about removing backslash escaping.
- *
- * Now realm parameter is user-defined and human-readable, strange things
- * happen when it contains quotes:
- * - Apache allows quotes in realm, but apparently uses realm value without
- * backslashes for digest computation
- * - Squid allows (manually escaped) quotes there, but it is impossible to
- * authorize with either escaped or unescaped quotes used in digest,
- * probably it cannot parse the response (?)
- * - Both IE and Firefox display realm value with backslashes in
- * the password popup and apparently use the same value for digest
- *
- * HTTP_Request2 follows IE and Firefox (and hopefully RFC 2617) in
- * quoted-string handling, unfortunately that means failure to authorize
- * sometimes
- *
- * @param string value of WWW-Authenticate or Proxy-Authenticate header
- * @return mixed associative array with challenge parameters, false if
- * no challenge is present in header value
- * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
- */
- protected function parseDigestChallenge($headerValue)
- {
- $authParam = '(' . self::REGEXP_TOKEN . ')\\s*=\\s*(' .
- self::REGEXP_TOKEN . '|' . self::REGEXP_QUOTED_STRING . ')';
- $challenge = "!(?<=^|\\s|,)Digest ({$authParam}\\s*(,\\s*|$))+!";
- if (!preg_match($challenge, $headerValue, $matches)) {
- return false;
- }
-
- preg_match_all('!' . $authParam . '!', $matches[0], $params);
- $paramsAry = array();
- $knownParams = array('realm', 'domain', 'nonce', 'opaque', 'stale',
- 'algorithm', 'qop');
- for ($i = 0; $i < count($params[0]); $i++) {
- // section 3.2.1: Any unrecognized directive MUST be ignored.
- if (in_array($params[1][$i], $knownParams)) {
- if ('"' == substr($params[2][$i], 0, 1)) {
- $paramsAry[$params[1][$i]] = substr($params[2][$i], 1, -1);
- } else {
- $paramsAry[$params[1][$i]] = $params[2][$i];
- }
- }
- }
- // we only support qop=auth
- if (!empty($paramsAry['qop']) &&
- !in_array('auth', array_map('trim', explode(',', $paramsAry['qop'])))
- ) {
- throw new HTTP_Request2_Exception(
- "Only 'auth' qop is currently supported in digest authentication, " .
- "server requested '{$paramsAry['qop']}'"
- );
- }
- // we only support algorithm=MD5
- if (!empty($paramsAry['algorithm']) && 'MD5' != $paramsAry['algorithm']) {
- throw new HTTP_Request2_Exception(
- "Only 'MD5' algorithm is currently supported in digest authentication, " .
- "server requested '{$paramsAry['algorithm']}'"
- );
- }
-
- return $paramsAry;
- }
-
- /**
- * Parses [Proxy-]Authentication-Info header value and updates challenge
- *
- * @param array challenge to update
- * @param string value of [Proxy-]Authentication-Info header
- * @todo validate server rspauth response
- */
- protected function updateChallenge(&$challenge, $headerValue)
- {
- $authParam = '!(' . self::REGEXP_TOKEN . ')\\s*=\\s*(' .
- self::REGEXP_TOKEN . '|' . self::REGEXP_QUOTED_STRING . ')!';
- $paramsAry = array();
-
- preg_match_all($authParam, $headerValue, $params);
- for ($i = 0; $i < count($params[0]); $i++) {
- if ('"' == substr($params[2][$i], 0, 1)) {
- $paramsAry[$params[1][$i]] = substr($params[2][$i], 1, -1);
- } else {
- $paramsAry[$params[1][$i]] = $params[2][$i];
- }
- }
- // for now, just update the nonce value
- if (!empty($paramsAry['nextnonce'])) {
- $challenge['nonce'] = $paramsAry['nextnonce'];
- $challenge['nc'] = 1;
- }
- }
-
- /**
- * Creates a value for [Proxy-]Authorization header when using digest authentication
- *
- * @param string user name
- * @param string password
- * @param string request URL
- * @param array digest challenge parameters
- * @return string value of [Proxy-]Authorization request header
- * @link http://tools.ietf.org/html/rfc2617#section-3.2.2
- */
- protected function createDigestResponse($user, $password, $url, &$challenge)
- {
- if (false !== ($q = strpos($url, '?')) &&
- $this->request->getConfig('digest_compat_ie')
- ) {
- $url = substr($url, 0, $q);
- }
-
- $a1 = md5($user . ':' . $challenge['realm'] . ':' . $password);
- $a2 = md5($this->request->getMethod() . ':' . $url);
-
- if (empty($challenge['qop'])) {
- $digest = md5($a1 . ':' . $challenge['nonce'] . ':' . $a2);
- } else {
- $challenge['cnonce'] = 'Req2.' . rand();
- if (empty($challenge['nc'])) {
- $challenge['nc'] = 1;
- }
- $nc = sprintf('%08x', $challenge['nc']++);
- $digest = md5($a1 . ':' . $challenge['nonce'] . ':' . $nc . ':' .
- $challenge['cnonce'] . ':auth:' . $a2);
- }
- return 'Digest username="' . str_replace(array('\\', '"'), array('\\\\', '\\"'), $user) . '", ' .
- 'realm="' . $challenge['realm'] . '", ' .
- 'nonce="' . $challenge['nonce'] . '", ' .
- 'uri="' . $url . '", ' .
- 'response="' . $digest . '"' .
- (!empty($challenge['opaque'])?
- ', opaque="' . $challenge['opaque'] . '"':
- '') .
- (!empty($challenge['qop'])?
- ', qop="auth", nc=' . $nc . ', cnonce="' . $challenge['cnonce'] . '"':
- '');
- }
-
- /**
- * Adds 'Authorization' header (if needed) to request headers array
- *
- * @param array request headers
- * @param string request host (needed for digest authentication)
- * @param string request URL (needed for digest authentication)
- * @throws HTTP_Request2_Exception
- */
- protected function addAuthorizationHeader(&$headers, $requestHost, $requestUrl)
- {
- if (!($auth = $this->request->getAuth())) {
- return;
- }
- switch ($auth['scheme']) {
- case HTTP_Request2::AUTH_BASIC:
- $headers['authorization'] =
- 'Basic ' . base64_encode($auth['user'] . ':' . $auth['password']);
- break;
-
- case HTTP_Request2::AUTH_DIGEST:
- unset($this->serverChallenge);
- $fullUrl = ('/' == $requestUrl[0])?
- $this->request->getUrl()->getScheme() . '://' .
- $requestHost . $requestUrl:
- $requestUrl;
- foreach (array_keys(self::$challenges) as $key) {
- if ($key == substr($fullUrl, 0, strlen($key))) {
- $headers['authorization'] = $this->createDigestResponse(
- $auth['user'], $auth['password'],
- $requestUrl, self::$challenges[$key]
- );
- $this->serverChallenge =& self::$challenges[$key];
- break;
- }
- }
- break;
-
- default:
- throw new HTTP_Request2_Exception(
- "Unknown HTTP authentication scheme '{$auth['scheme']}'"
- );
- }
- }
-
- /**
- * Adds 'Proxy-Authorization' header (if needed) to request headers array
- *
- * @param array request headers
- * @param string request URL (needed for digest authentication)
- * @throws HTTP_Request2_Exception
- */
- protected function addProxyAuthorizationHeader(&$headers, $requestUrl)
- {
- if (!$this->request->getConfig('proxy_host') ||
- !($user = $this->request->getConfig('proxy_user')) ||
- (0 == strcasecmp('https', $this->request->getUrl()->getScheme()) &&
- HTTP_Request2::METHOD_CONNECT != $this->request->getMethod())
- ) {
- return;
- }
-
- $password = $this->request->getConfig('proxy_password');
- switch ($this->request->getConfig('proxy_auth_scheme')) {
- case HTTP_Request2::AUTH_BASIC:
- $headers['proxy-authorization'] =
- 'Basic ' . base64_encode($user . ':' . $password);
- break;
-
- case HTTP_Request2::AUTH_DIGEST:
- unset($this->proxyChallenge);
- $proxyUrl = 'proxy://' . $this->request->getConfig('proxy_host') .
- ':' . $this->request->getConfig('proxy_port');
- if (!empty(self::$challenges[$proxyUrl])) {
- $headers['proxy-authorization'] = $this->createDigestResponse(
- $user, $password,
- $requestUrl, self::$challenges[$proxyUrl]
- );
- $this->proxyChallenge =& self::$challenges[$proxyUrl];
- }
- break;
-
- default:
- throw new HTTP_Request2_Exception(
- "Unknown HTTP authentication scheme '" .
- $this->request->getConfig('proxy_auth_scheme') . "'"
- );
- }
- }
-
-
- /**
- * Creates the string with the Request-Line and request headers
- *
- * @return string
- * @throws HTTP_Request2_Exception
- */
- protected function prepareHeaders()
- {
- $headers = $this->request->getHeaders();
- $url = $this->request->getUrl();
- $connect = HTTP_Request2::METHOD_CONNECT == $this->request->getMethod();
- $host = $url->getHost();
-
- $defaultPort = 0 == strcasecmp($url->getScheme(), 'https')? 443: 80;
- if (($port = $url->getPort()) && $port != $defaultPort || $connect) {
- $host .= ':' . (empty($port)? $defaultPort: $port);
- }
- // Do not overwrite explicitly set 'Host' header, see bug #16146
- if (!isset($headers['host'])) {
- $headers['host'] = $host;
- }
-
- if ($connect) {
- $requestUrl = $host;
-
- } else {
- if (!$this->request->getConfig('proxy_host') ||
- 0 == strcasecmp($url->getScheme(), 'https')
- ) {
- $requestUrl = '';
- } else {
- $requestUrl = $url->getScheme() . '://' . $host;
- }
- $path = $url->getPath();
- $query = $url->getQuery();
- $requestUrl .= (empty($path)? '/': $path) . (empty($query)? '': '?' . $query);
- }
-
- if ('1.1' == $this->request->getConfig('protocol_version') &&
- extension_loaded('zlib') && !isset($headers['accept-encoding'])
- ) {
- $headers['accept-encoding'] = 'gzip, deflate';
- }
-
- $this->addAuthorizationHeader($headers, $host, $requestUrl);
- $this->addProxyAuthorizationHeader($headers, $requestUrl);
- $this->calculateRequestLength($headers);
-
- $headersStr = $this->request->getMethod() . ' ' . $requestUrl . ' HTTP/' .
- $this->request->getConfig('protocol_version') . "\r\n";
- foreach ($headers as $name => $value) {
- $canonicalName = implode('-', array_map('ucfirst', explode('-', $name)));
- $headersStr .= $canonicalName . ': ' . $value . "\r\n";
- }
- return $headersStr . "\r\n";
- }
-
- /**
- * Sends the request body
- *
- * @throws HTTP_Request2_Exception
- */
- protected function writeBody()
- {
- if (in_array($this->request->getMethod(), self::$bodyDisallowed) ||
- 0 == $this->contentLength
- ) {
- return;
- }
-
- $position = 0;
- $bufferSize = $this->request->getConfig('buffer_size');
- while ($position < $this->contentLength) {
- if (is_string($this->requestBody)) {
- $str = substr($this->requestBody, $position, $bufferSize);
- } elseif (is_resource($this->requestBody)) {
- $str = fread($this->requestBody, $bufferSize);
- } else {
- $str = $this->requestBody->read($bufferSize);
- }
- if (false === @fwrite($this->socket, $str, strlen($str))) {
- throw new HTTP_Request2_Exception('Error writing request');
- }
- // Provide the length of written string to the observer, request #7630
- $this->request->setLastEvent('sentBodyPart', strlen($str));
- $position += strlen($str);
- }
- }
-
- /**
- * Reads the remote server's response
- *
- * @return HTTP_Request2_Response
- * @throws HTTP_Request2_Exception
- */
- protected function readResponse()
- {
- $bufferSize = $this->request->getConfig('buffer_size');
-
- do {
- $response = new HTTP_Request2_Response($this->readLine($bufferSize), true);
- do {
- $headerLine = $this->readLine($bufferSize);
- $response->parseHeaderLine($headerLine);
- } while ('' != $headerLine);
- } while (in_array($response->getStatus(), array(100, 101)));
-
- $this->request->setLastEvent('receivedHeaders', $response);
-
- // No body possible in such responses
- if (HTTP_Request2::METHOD_HEAD == $this->request->getMethod() ||
- (HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() &&
- 200 <= $response->getStatus() && 300 > $response->getStatus()) ||
- in_array($response->getStatus(), array(204, 304))
- ) {
- return $response;
- }
-
- $chunked = 'chunked' == $response->getHeader('transfer-encoding');
- $length = $response->getHeader('content-length');
- $hasBody = false;
- if ($chunked || null === $length || 0 < intval($length)) {
- // RFC 2616, section 4.4:
- // 3. ... If a message is received with both a
- // Transfer-Encoding header field and a Content-Length header field,
- // the latter MUST be ignored.
- $toRead = ($chunked || null === $length)? null: $length;
- $this->chunkLength = 0;
-
- while (!feof($this->socket) && (is_null($toRead) || 0 < $toRead)) {
- if ($chunked) {
- $data = $this->readChunked($bufferSize);
- } elseif (is_null($toRead)) {
- $data = $this->fread($bufferSize);
- } else {
- $data = $this->fread(min($toRead, $bufferSize));
- $toRead -= strlen($data);
- }
- if ('' == $data && (!$this->chunkLength || feof($this->socket))) {
- break;
- }
-
- $hasBody = true;
- if ($this->request->getConfig('store_body')) {
- $response->appendBody($data);
- }
- if (!in_array($response->getHeader('content-encoding'), array('identity', null))) {
- $this->request->setLastEvent('receivedEncodedBodyPart', $data);
- } else {
- $this->request->setLastEvent('receivedBodyPart', $data);
- }
- }
- }
-
- if ($hasBody) {
- $this->request->setLastEvent('receivedBody', $response);
- }
- return $response;
- }
-
- /**
- * Reads until either the end of the socket or a newline, whichever comes first
- *
- * Strips the trailing newline from the returned data, handles global
- * request timeout. Method idea borrowed from Net_Socket PEAR package.
- *
- * @param int buffer size to use for reading
- * @return Available data up to the newline (not including newline)
- * @throws HTTP_Request2_Exception In case of timeout
- */
- protected function readLine($bufferSize)
- {
- $line = '';
- while (!feof($this->socket)) {
- if ($this->timeout) {
- stream_set_timeout($this->socket, max($this->timeout - time(), 1));
- }
- $line .= @fgets($this->socket, $bufferSize);
- $info = stream_get_meta_data($this->socket);
- if ($info['timed_out'] || $this->timeout && time() > $this->timeout) {
- throw new HTTP_Request2_Exception(
- 'Request timed out after ' .
- $this->request->getConfig('timeout') . ' second(s)'
- );
- }
- if (substr($line, -1) == "\n") {
- return rtrim($line, "\r\n");
- }
- }
- return $line;
- }
-
- /**
- * Wrapper around fread(), handles global request timeout
- *
- * @param int Reads up to this number of bytes
- * @return Data read from socket
- * @throws HTTP_Request2_Exception In case of timeout
- */
- protected function fread($length)
- {
- if ($this->timeout) {
- stream_set_timeout($this->socket, max($this->timeout - time(), 1));
- }
- $data = fread($this->socket, $length);
- $info = stream_get_meta_data($this->socket);
- if ($info['timed_out'] || $this->timeout && time() > $this->timeout) {
- throw new HTTP_Request2_Exception(
- 'Request timed out after ' .
- $this->request->getConfig('timeout') . ' second(s)'
- );
- }
- return $data;
- }
-
- /**
- * Reads a part of response body encoded with chunked Transfer-Encoding
- *
- * @param int buffer size to use for reading
- * @return string
- * @throws HTTP_Request2_Exception
- */
- protected function readChunked($bufferSize)
- {
- // at start of the next chunk?
- if (0 == $this->chunkLength) {
- $line = $this->readLine($bufferSize);
- if (!preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
- throw new HTTP_Request2_Exception(
- "Cannot decode chunked response, invalid chunk length '{$line}'"
- );
- } else {
- $this->chunkLength = hexdec($matches[1]);
- // Chunk with zero length indicates the end
- if (0 == $this->chunkLength) {
- $this->readLine($bufferSize);
- return '';
- }
- }
- }
- $data = $this->fread(min($this->chunkLength, $bufferSize));
- $this->chunkLength -= strlen($data);
- if (0 == $this->chunkLength) {
- $this->readLine($bufferSize); // Trailing CRLF
- }
- return $data;
- }
-}
-
+<?php
+/**
+ * Socket-based adapter for HTTP_Request2
+ *
+ * PHP version 5
+ *
+ * LICENSE:
+ *
+ * Copyright (c) 2008, 2009, Alexey Borzov <avb@php.net>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * The names of the authors may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @category HTTP
+ * @package HTTP_Request2
+ * @author Alexey Borzov <avb@php.net>
+ * @license http://opensource.org/licenses/bsd-license.php New BSD License
+ * @version CVS: $Id: Socket.php 279760 2009-05-03 10:46:42Z avb $
+ * @link http://pear.php.net/package/HTTP_Request2
+ */
+
+/**
+ * Base class for HTTP_Request2 adapters
+ */
+require_once 'HTTP/Request2/Adapter.php';
+
+/**
+ * Socket-based adapter for HTTP_Request2
+ *
+ * This adapter uses only PHP sockets and will work on almost any PHP
+ * environment. Code is based on original HTTP_Request PEAR package.
+ *
+ * @category HTTP
+ * @package HTTP_Request2
+ * @author Alexey Borzov <avb@php.net>
+ * @version Release: 0.4.1
+ */
+class HTTP_Request2_Adapter_Socket extends HTTP_Request2_Adapter
+{
+ /**
+ * Regular expression for 'token' rule from RFC 2616
+ */
+ const REGEXP_TOKEN = '[^\x00-\x1f\x7f-\xff()<>@,;:\\\\"/\[\]?={}\s]+';
+
+ /**
+ * Regular expression for 'quoted-string' rule from RFC 2616
+ */
+ const REGEXP_QUOTED_STRING = '"(?:\\\\.|[^\\\\"])*"';
+
+ /**
+ * Connected sockets, needed for Keep-Alive support
+ * @var array
+ * @see connect()
+ */
+ protected static $sockets = array();
+
+ /**
+ * Data for digest authentication scheme
+ *
+ * The keys for the array are URL prefixes.
+ *
+ * The values are associative arrays with data (realm, nonce, nonce-count,
+ * opaque...) needed for digest authentication. Stored here to prevent making
+ * duplicate requests to digest-protected resources after we have already
+ * received the challenge.
+ *
+ * @var array
+ */
+ protected static $challenges = array();
+
+ /**
+ * Connected socket
+ * @var resource
+ * @see connect()
+ */
+ protected $socket;
+
+ /**
+ * Challenge used for server digest authentication
+ * @var array
+ */
+ protected $serverChallenge;
+
+ /**
+ * Challenge used for proxy digest authentication
+ * @var array
+ */
+ protected $proxyChallenge;
+
+ /**
+ * Global timeout, exception will be raised if request continues past this time
+ * @var integer
+ */
+ protected $timeout = null;
+
+ /**
+ * Remaining length of the current chunk, when reading chunked response
+ * @var integer
+ * @see readChunked()
+ */
+ protected $chunkLength = 0;
+
+ /**
+ * Sends request to the remote server and returns its response
+ *
+ * @param HTTP_Request2
+ * @return HTTP_Request2_Response
+ * @throws HTTP_Request2_Exception
+ */
+ public function sendRequest(HTTP_Request2 $request)
+ {
+ $this->request = $request;
+ $keepAlive = $this->connect();
+ $headers = $this->prepareHeaders();
+
+ // Use global request timeout if given, see feature requests #5735, #8964
+ if ($timeout = $request->getConfig('timeout')) {
+ $this->timeout = time() + $timeout;
+ } else {
+ $this->timeout = null;
+ }
+
+ try {
+ if (false === @fwrite($this->socket, $headers, strlen($headers))) {
+ throw new HTTP_Request2_Exception('Error writing request');
+ }
+ // provide request headers to the observer, see request #7633
+ $this->request->setLastEvent('sentHeaders', $headers);
+ $this->writeBody();
+
+ if ($this->timeout && time() > $this->timeout) {
+ throw new HTTP_Request2_Exception(
+ 'Request timed out after ' .
+ $request->getConfig('timeout') . ' second(s)'
+ );
+ }
+
+ $response = $this->readResponse();
+
+ if (!$this->canKeepAlive($keepAlive, $response)) {
+ $this->disconnect();
+ }
+
+ if ($this->shouldUseProxyDigestAuth($response)) {
+ return $this->sendRequest($request);
+ }
+ if ($this->shouldUseServerDigestAuth($response)) {
+ return $this->sendRequest($request);
+ }
+ if ($authInfo = $response->getHeader('authentication-info')) {
+ $this->updateChallenge($this->serverChallenge, $authInfo);
+ }
+ if ($proxyInfo = $response->getHeader('proxy-authentication-info')) {
+ $this->updateChallenge($this->proxyChallenge, $proxyInfo);
+ }
+
+ } catch (Exception $e) {
+ $this->disconnect();
+ throw $e;
+ }
+
+ return $response;
+ }
+
+ /**
+ * Connects to the remote server
+ *
+ * @return bool whether the connection can be persistent
+ * @throws HTTP_Request2_Exception
+ */
+ protected function connect()
+ {
+ $secure = 0 == strcasecmp($this->request->getUrl()->getScheme(), 'https');
+ $tunnel = HTTP_Request2::METHOD_CONNECT == $this->request->getMethod();
+ $headers = $this->request->getHeaders();
+ $reqHost = $this->request->getUrl()->getHost();
+ if (!($reqPort = $this->request->getUrl()->getPort())) {
+ $reqPort = $secure? 443: 80;
+ }
+
+ if ($host = $this->request->getConfig('proxy_host')) {
+ if (!($port = $this->request->getConfig('proxy_port'))) {
+ throw new HTTP_Request2_Exception('Proxy port not provided');
+ }
+ $proxy = true;
+ } else {
+ $host = $reqHost;
+ $port = $reqPort;
+ $proxy = false;
+ }
+
+ if ($tunnel && !$proxy) {
+ throw new HTTP_Request2_Exception(
+ "Trying to perform CONNECT request without proxy"
+ );
+ }
+ if ($secure && !in_array('ssl', stream_get_transports())) {
+ throw new HTTP_Request2_Exception(
+ 'Need OpenSSL support for https:// requests'
+ );
+ }
+
+ // RFC 2068, section 19.7.1: A client MUST NOT send the Keep-Alive
+ // connection token to a proxy server...
+ if ($proxy && !$secure &&
+ !empty($headers['connection']) && 'Keep-Alive' == $headers['connection']
+ ) {
+ $this->request->setHeader('connection');
+ }
+
+ $keepAlive = ('1.1' == $this->request->getConfig('protocol_version') &&
+ empty($headers['connection'])) ||
+ (!empty($headers['connection']) &&
+ 'Keep-Alive' == $headers['connection']);
+ $host = ((!$secure || $proxy)? 'tcp://': 'ssl://') . $host;
+
+ $options = array();
+ if ($secure || $tunnel) {
+ foreach ($this->request->getConfig() as $name => $value) {
+ if ('ssl_' == substr($name, 0, 4) && null !== $value) {
+ if ('ssl_verify_host' == $name) {
+ if ($value) {
+ $options['CN_match'] = $reqHost;
+ }
+ } else {
+ $options[substr($name, 4)] = $value;
+ }
+ }
+ }
+ ksort($options);
+ }
+
+ // Changing SSL context options after connection is established does *not*
+ // work, we need a new connection if options change
+ $remote = $host . ':' . $port;
+ $socketKey = $remote . (($secure && $proxy)? "->{$reqHost}:{$reqPort}": '') .
+ (empty($options)? '': ':' . serialize($options));
+ unset($this->socket);
+
+ // We use persistent connections and have a connected socket?
+ // Ensure that the socket is still connected, see bug #16149
+ if ($keepAlive && !empty(self::$sockets[$socketKey]) &&
+ !feof(self::$sockets[$socketKey])
+ ) {
+ $this->socket =& self::$sockets[$socketKey];
+
+ } elseif ($secure && $proxy && !$tunnel) {
+ $this->establishTunnel();
+ $this->request->setLastEvent(
+ 'connect', "ssl://{$reqHost}:{$reqPort} via {$host}:{$port}"
+ );
+ self::$sockets[$socketKey] =& $this->socket;
+
+ } else {
+ // Set SSL context options if doing HTTPS request or creating a tunnel
+ $context = stream_context_create();
+ foreach ($options as $name => $value) {
+ if (!stream_context_set_option($context, 'ssl', $name, $value)) {
+ throw new HTTP_Request2_Exception(
+ "Error setting SSL context option '{$name}'"
+ );
+ }
+ }
+ $this->socket = @stream_socket_client(
+ $remote, $errno, $errstr,
+ $this->request->getConfig('connect_timeout'),
+ STREAM_CLIENT_CONNECT, $context
+ );
+ if (!$this->socket) {
+ throw new HTTP_Request2_Exception(
+ "Unable to connect to {$remote}. Error #{$errno}: {$errstr}"
+ );
+ }
+ $this->request->setLastEvent('connect', $remote);
+ self::$sockets[$socketKey] =& $this->socket;
+ }
+ return $keepAlive;
+ }
+
+ /**
+ * Establishes a tunnel to a secure remote server via HTTP CONNECT request
+ *
+ * This method will fail if 'ssl_verify_peer' is enabled. Probably because PHP
+ * sees that we are connected to a proxy server (duh!) rather than the server
+ * that presents its certificate.
+ *
+ * @link http://tools.ietf.org/html/rfc2817#section-5.2
+ * @throws HTTP_Request2_Exception
+ */
+ protected function establishTunnel()
+ {
+ $donor = new self;
+ $connect = new HTTP_Request2(
+ $this->request->getUrl(), HTTP_Request2::METHOD_CONNECT,
+ array_merge($this->request->getConfig(),
+ array('adapter' => $donor))
+ );
+ $response = $connect->send();
+ // Need any successful (2XX) response
+ if (200 > $response->getStatus() || 300 <= $response->getStatus()) {
+ throw new HTTP_Request2_Exception(
+ 'Failed to connect via HTTPS proxy. Proxy response: ' .
+ $response->getStatus() . ' ' . $response->getReasonPhrase()
+ );
+ }
+ $this->socket = $donor->socket;
+
+ $modes = array(
+ STREAM_CRYPTO_METHOD_TLS_CLIENT,
+ STREAM_CRYPTO_METHOD_SSLv3_CLIENT,
+ STREAM_CRYPTO_METHOD_SSLv23_CLIENT,
+ STREAM_CRYPTO_METHOD_SSLv2_CLIENT
+ );
+
+ foreach ($modes as $mode) {
+ if (stream_socket_enable_crypto($this->socket, true, $mode)) {
+ return;
+ }
+ }
+ throw new HTTP_Request2_Exception(
+ 'Failed to enable secure connection when connecting through proxy'
+ );
+ }
+
+ /**
+ * Checks whether current connection may be reused or should be closed
+ *
+ * @param boolean whether connection could be persistent
+ * in the first place
+ * @param HTTP_Request2_Response response object to check
+ * @return boolean
+ */
+ protected function canKeepAlive($requestKeepAlive, HTTP_Request2_Response $response)
+ {
+ // Do not close socket on successful CONNECT request
+ if (HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() &&
+ 200 <= $response->getStatus() && 300 > $response->getStatus()
+ ) {
+ return true;
+ }
+
+ $lengthKnown = 'chunked' == strtolower($response->getHeader('transfer-encoding')) ||
+ null !== $response->getHeader('content-length');
+ $persistent = 'keep-alive' == strtolower($response->getHeader('connection')) ||
+ (null === $response->getHeader('connection') &&
+ '1.1' == $response->getVersion());
+ return $requestKeepAlive && $lengthKnown && $persistent;
+ }
+
+ /**
+ * Disconnects from the remote server
+ */
+ protected function disconnect()
+ {
+ if (is_resource($this->socket)) {
+ fclose($this->socket);
+ $this->socket = null;
+ $this->request->setLastEvent('disconnect');
+ }
+ }
+
+ /**
+ * Checks whether another request should be performed with server digest auth
+ *
+ * Several conditions should be satisfied for it to return true:
+ * - response status should be 401
+ * - auth credentials should be set in the request object
+ * - response should contain WWW-Authenticate header with digest challenge
+ * - there is either no challenge stored for this URL or new challenge
+ * contains stale=true parameter (in other case we probably just failed
+ * due to invalid username / password)
+ *
+ * The method stores challenge values in $challenges static property
+ *
+ * @param HTTP_Request2_Response response to check
+ * @return boolean whether another request should be performed
+ * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
+ */
+ protected function shouldUseServerDigestAuth(HTTP_Request2_Response $response)
+ {
+ // no sense repeating a request if we don't have credentials
+ if (401 != $response->getStatus() || !$this->request->getAuth()) {
+ return false;
+ }
+ if (!$challenge = $this->parseDigestChallenge($response->getHeader('www-authenticate'))) {
+ return false;
+ }
+
+ $url = $this->request->getUrl();
+ $scheme = $url->getScheme();
+ $host = $scheme . '://' . $url->getHost();
+ if ($port = $url->getPort()) {
+ if ((0 == strcasecmp($scheme, 'http') && 80 != $port) ||
+ (0 == strcasecmp($scheme, 'https') && 443 != $port)
+ ) {
+ $host .= ':' . $port;
+ }
+ }
+
+ if (!empty($challenge['domain'])) {
+ $prefixes = array();
+ foreach (preg_split('/\\s+/', $challenge['domain']) as $prefix) {
+ // don't bother with different servers
+ if ('/' == substr($prefix, 0, 1)) {
+ $prefixes[] = $host . $prefix;
+ }
+ }
+ }
+ if (empty($prefixes)) {
+ $prefixes = array($host . '/');
+ }
+
+ $ret = true;
+ foreach ($prefixes as $prefix) {
+ if (!empty(self::$challenges[$prefix]) &&
+ (empty($challenge['stale']) || strcasecmp('true', $challenge['stale']))
+ ) {
+ // probably credentials are invalid
+ $ret = false;
+ }
+ self::$challenges[$prefix] =& $challenge;
+ }
+ return $ret;
+ }
+
+ /**
+ * Checks whether another request should be performed with proxy digest auth
+ *
+ * Several conditions should be satisfied for it to return true:
+ * - response status should be 407
+ * - proxy auth credentials should be set in the request object
+ * - response should contain Proxy-Authenticate header with digest challenge
+ * - there is either no challenge stored for this proxy or new challenge
+ * contains stale=true parameter (in other case we probably just failed
+ * due to invalid username / password)
+ *
+ * The method stores challenge values in $challenges static property
+ *
+ * @param HTTP_Request2_Response response to check
+ * @return boolean whether another request should be performed
+ * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
+ */
+ protected function shouldUseProxyDigestAuth(HTTP_Request2_Response $response)
+ {
+ if (407 != $response->getStatus() || !$this->request->getConfig('proxy_user')) {
+ return false;
+ }
+ if (!($challenge = $this->parseDigestChallenge($response->getHeader('proxy-authenticate')))) {
+ return false;
+ }
+
+ $key = 'proxy://' . $this->request->getConfig('proxy_host') .
+ ':' . $this->request->getConfig('proxy_port');
+
+ if (!empty(self::$challenges[$key]) &&
+ (empty($challenge['stale']) || strcasecmp('true', $challenge['stale']))
+ ) {
+ $ret = false;
+ } else {
+ $ret = true;
+ }
+ self::$challenges[$key] = $challenge;
+ return $ret;
+ }
+
+ /**
+ * Extracts digest method challenge from (WWW|Proxy)-Authenticate header value
+ *
+ * There is a problem with implementation of RFC 2617: several of the parameters
+ * here are defined as quoted-string and thus may contain backslash escaped
+ * double quotes (RFC 2616, section 2.2). However, RFC 2617 defines unq(X) as
+ * just value of quoted-string X without surrounding quotes, it doesn't speak
+ * about removing backslash escaping.
+ *
+ * Now realm parameter is user-defined and human-readable, strange things
+ * happen when it contains quotes:
+ * - Apache allows quotes in realm, but apparently uses realm value without
+ * backslashes for digest computation
+ * - Squid allows (manually escaped) quotes there, but it is impossible to
+ * authorize with either escaped or unescaped quotes used in digest,
+ * probably it can't parse the response (?)
+ * - Both IE and Firefox display realm value with backslashes in
+ * the password popup and apparently use the same value for digest
+ *
+ * HTTP_Request2 follows IE and Firefox (and hopefully RFC 2617) in
+ * quoted-string handling, unfortunately that means failure to authorize
+ * sometimes
+ *
+ * @param string value of WWW-Authenticate or Proxy-Authenticate header
+ * @return mixed associative array with challenge parameters, false if
+ * no challenge is present in header value
+ * @throws HTTP_Request2_Exception in case of unsupported challenge parameters
+ */
+ protected function parseDigestChallenge($headerValue)
+ {
+ $authParam = '(' . self::REGEXP_TOKEN . ')\\s*=\\s*(' .
+ self::REGEXP_TOKEN . '|' . self::REGEXP_QUOTED_STRING . ')';
+ $challenge = "!(?<=^|\\s|,)Digest ({$authParam}\\s*(,\\s*|$))+!";
+ if (!preg_match($challenge, $headerValue, $matches)) {
+ return false;
+ }
+
+ preg_match_all('!' . $authParam . '!', $matches[0], $params);
+ $paramsAry = array();
+ $knownParams = array('realm', 'domain', 'nonce', 'opaque', 'stale',
+ 'algorithm', 'qop');
+ for ($i = 0; $i < count($params[0]); $i++) {
+ // section 3.2.1: Any unrecognized directive MUST be ignored.
+ if (in_array($params[1][$i], $knownParams)) {
+ if ('"' == substr($params[2][$i], 0, 1)) {
+ $paramsAry[$params[1][$i]] = substr($params[2][$i], 1, -1);
+ } else {
+ $paramsAry[$params[1][$i]] = $params[2][$i];
+ }
+ }
+ }
+ // we only support qop=auth
+ if (!empty($paramsAry['qop']) &&
+ !in_array('auth', array_map('trim', explode(',', $paramsAry['qop'])))
+ ) {
+ throw new HTTP_Request2_Exception(
+ "Only 'auth' qop is currently supported in digest authentication, " .
+ "server requested '{$paramsAry['qop']}'"
+ );
+ }
+ // we only support algorithm=MD5
+ if (!empty($paramsAry['algorithm']) && 'MD5' != $paramsAry['algorithm']) {
+ throw new HTTP_Request2_Exception(
+ "Only 'MD5' algorithm is currently supported in digest authentication, " .
+ "server requested '{$paramsAry['algorithm']}'"
+ );
+ }
+
+ return $paramsAry;
+ }
+
+ /**
+ * Parses [Proxy-]Authentication-Info header value and updates challenge
+ *
+ * @param array challenge to update
+ * @param string value of [Proxy-]Authentication-Info header
+ * @todo validate server rspauth response
+ */
+ protected function updateChallenge(&$challenge, $headerValue)
+ {
+ $authParam = '!(' . self::REGEXP_TOKEN . ')\\s*=\\s*(' .
+ self::REGEXP_TOKEN . '|' . self::REGEXP_QUOTED_STRING . ')!';
+ $paramsAry = array();
+
+ preg_match_all($authParam, $headerValue, $params);
+ for ($i = 0; $i < count($params[0]); $i++) {
+ if ('"' == substr($params[2][$i], 0, 1)) {
+ $paramsAry[$params[1][$i]] = substr($params[2][$i], 1, -1);
+ } else {
+ $paramsAry[$params[1][$i]] = $params[2][$i];
+ }
+ }
+ // for now, just update the nonce value
+ if (!empty($paramsAry['nextnonce'])) {
+ $challenge['nonce'] = $paramsAry['nextnonce'];
+ $challenge['nc'] = 1;
+ }
+ }
+
+ /**
+ * Creates a value for [Proxy-]Authorization header when using digest authentication
+ *
+ * @param string user name
+ * @param string password
+ * @param string request URL
+ * @param array digest challenge parameters
+ * @return string value of [Proxy-]Authorization request header
+ * @link http://tools.ietf.org/html/rfc2617#section-3.2.2
+ */
+ protected function createDigestResponse($user, $password, $url, &$challenge)
+ {
+ if (false !== ($q = strpos($url, '?')) &&
+ $this->request->getConfig('digest_compat_ie')
+ ) {
+ $url = substr($url, 0, $q);
+ }
+
+ $a1 = md5($user . ':' . $challenge['realm'] . ':' . $password);
+ $a2 = md5($this->request->getMethod() . ':' . $url);
+
+ if (empty($challenge['qop'])) {
+ $digest = md5($a1 . ':' . $challenge['nonce'] . ':' . $a2);
+ } else {
+ $challenge['cnonce'] = 'Req2.' . rand();
+ if (empty($challenge['nc'])) {
+ $challenge['nc'] = 1;
+ }
+ $nc = sprintf('%08x', $challenge['nc']++);
+ $digest = md5($a1 . ':' . $challenge['nonce'] . ':' . $nc . ':' .
+ $challenge['cnonce'] . ':auth:' . $a2);
+ }
+ return 'Digest username="' . str_replace(array('\\', '"'), array('\\\\', '\\"'), $user) . '", ' .
+ 'realm="' . $challenge['realm'] . '", ' .
+ 'nonce="' . $challenge['nonce'] . '", ' .
+ 'uri="' . $url . '", ' .
+ 'response="' . $digest . '"' .
+ (!empty($challenge['opaque'])?
+ ', opaque="' . $challenge['opaque'] . '"':
+ '') .
+ (!empty($challenge['qop'])?
+ ', qop="auth", nc=' . $nc . ', cnonce="' . $challenge['cnonce'] . '"':
+ '');
+ }
+
+ /**
+ * Adds 'Authorization' header (if needed) to request headers array
+ *
+ * @param array request headers
+ * @param string request host (needed for digest authentication)
+ * @param string request URL (needed for digest authentication)
+ * @throws HTTP_Request2_Exception
+ */
+ protected function addAuthorizationHeader(&$headers, $requestHost, $requestUrl)
+ {
+ if (!($auth = $this->request->getAuth())) {
+ return;
+ }
+ switch ($auth['scheme']) {
+ case HTTP_Request2::AUTH_BASIC:
+ $headers['authorization'] =
+ 'Basic ' . base64_encode($auth['user'] . ':' . $auth['password']);
+ break;
+
+ case HTTP_Request2::AUTH_DIGEST:
+ unset($this->serverChallenge);
+ $fullUrl = ('/' == $requestUrl[0])?
+ $this->request->getUrl()->getScheme() . '://' .
+ $requestHost . $requestUrl:
+ $requestUrl;
+ foreach (array_keys(self::$challenges) as $key) {
+ if ($key == substr($fullUrl, 0, strlen($key))) {
+ $headers['authorization'] = $this->createDigestResponse(
+ $auth['user'], $auth['password'],
+ $requestUrl, self::$challenges[$key]
+ );
+ $this->serverChallenge =& self::$challenges[$key];
+ break;
+ }
+ }
+ break;
+
+ default:
+ throw new HTTP_Request2_Exception(
+ "Unknown HTTP authentication scheme '{$auth['scheme']}'"
+ );
+ }
+ }
+
+ /**
+ * Adds 'Proxy-Authorization' header (if needed) to request headers array
+ *
+ * @param array request headers
+ * @param string request URL (needed for digest authentication)
+ * @throws HTTP_Request2_Exception
+ */
+ protected function addProxyAuthorizationHeader(&$headers, $requestUrl)
+ {
+ if (!$this->request->getConfig('proxy_host') ||
+ !($user = $this->request->getConfig('proxy_user')) ||
+ (0 == strcasecmp('https', $this->request->getUrl()->getScheme()) &&
+ HTTP_Request2::METHOD_CONNECT != $this->request->getMethod())
+ ) {
+ return;
+ }
+
+ $password = $this->request->getConfig('proxy_password');
+ switch ($this->request->getConfig('proxy_auth_scheme')) {
+ case HTTP_Request2::AUTH_BASIC:
+ $headers['proxy-authorization'] =
+ 'Basic ' . base64_encode($user . ':' . $password);
+ break;
+
+ case HTTP_Request2::AUTH_DIGEST:
+ unset($this->proxyChallenge);
+ $proxyUrl = 'proxy://' . $this->request->getConfig('proxy_host') .
+ ':' . $this->request->getConfig('proxy_port');
+ if (!empty(self::$challenges[$proxyUrl])) {
+ $headers['proxy-authorization'] = $this->createDigestResponse(
+ $user, $password,
+ $requestUrl, self::$challenges[$proxyUrl]
+ );
+ $this->proxyChallenge =& self::$challenges[$proxyUrl];
+ }
+ break;
+
+ default:
+ throw new HTTP_Request2_Exception(
+ "Unknown HTTP authentication scheme '" .
+ $this->request->getConfig('proxy_auth_scheme') . "'"
+ );
+ }
+ }
+
+
+ /**
+ * Creates the string with the Request-Line and request headers
+ *
+ * @return string
+ * @throws HTTP_Request2_Exception
+ */
+ protected function prepareHeaders()
+ {
+ $headers = $this->request->getHeaders();
+ $url = $this->request->getUrl();
+ $connect = HTTP_Request2::METHOD_CONNECT == $this->request->getMethod();
+ $host = $url->getHost();
+
+ $defaultPort = 0 == strcasecmp($url->getScheme(), 'https')? 443: 80;
+ if (($port = $url->getPort()) && $port != $defaultPort || $connect) {
+ $host .= ':' . (empty($port)? $defaultPort: $port);
+ }
+ // Do not overwrite explicitly set 'Host' header, see bug #16146
+ if (!isset($headers['host'])) {
+ $headers['host'] = $host;
+ }
+
+ if ($connect) {
+ $requestUrl = $host;
+
+ } else {
+ if (!$this->request->getConfig('proxy_host') ||
+ 0 == strcasecmp($url->getScheme(), 'https')
+ ) {
+ $requestUrl = '';
+ } else {
+ $requestUrl = $url->getScheme() . '://' . $host;
+ }
+ $path = $url->getPath();
+ $query = $url->getQuery();
+ $requestUrl .= (empty($path)? '/': $path) . (empty($query)? '': '?' . $query);
+ }
+
+ if ('1.1' == $this->request->getConfig('protocol_version') &&
+ extension_loaded('zlib') && !isset($headers['accept-encoding'])
+ ) {
+ $headers['accept-encoding'] = 'gzip, deflate';
+ }
+
+ $this->addAuthorizationHeader($headers, $host, $requestUrl);
+ $this->addProxyAuthorizationHeader($headers, $requestUrl);
+ $this->calculateRequestLength($headers);
+
+ $headersStr = $this->request->getMethod() . ' ' . $requestUrl . ' HTTP/' .
+ $this->request->getConfig('protocol_version') . "\r\n";
+ foreach ($headers as $name => $value) {
+ $canonicalName = implode('-', array_map('ucfirst', explode('-', $name)));
+ $headersStr .= $canonicalName . ': ' . $value . "\r\n";
+ }
+ return $headersStr . "\r\n";
+ }
+
+ /**
+ * Sends the request body
+ *
+ * @throws HTTP_Request2_Exception
+ */
+ protected function writeBody()
+ {
+ if (in_array($this->request->getMethod(), self::$bodyDisallowed) ||
+ 0 == $this->contentLength
+ ) {
+ return;
+ }
+
+ $position = 0;
+ $bufferSize = $this->request->getConfig('buffer_size');
+ while ($position < $this->contentLength) {
+ if (is_string($this->requestBody)) {
+ $str = substr($this->requestBody, $position, $bufferSize);
+ } elseif (is_resource($this->requestBody)) {
+ $str = fread($this->requestBody, $bufferSize);
+ } else {
+ $str = $this->requestBody->read($bufferSize);
+ }
+ if (false === @fwrite($this->socket, $str, strlen($str))) {
+ throw new HTTP_Request2_Exception('Error writing request');
+ }
+ // Provide the length of written string to the observer, request #7630
+ $this->request->setLastEvent('sentBodyPart', strlen($str));
+ $position += strlen($str);
+ }
+ }
+
+ /**
+ * Reads the remote server's response
+ *
+ * @return HTTP_Request2_Response
+ * @throws HTTP_Request2_Exception
+ */
+ protected function readResponse()
+ {
+ $bufferSize = $this->request->getConfig('buffer_size');
+
+ do {
+ $response = new HTTP_Request2_Response($this->readLine($bufferSize), true);
+ do {
+ $headerLine = $this->readLine($bufferSize);
+ $response->parseHeaderLine($headerLine);
+ } while ('' != $headerLine);
+ } while (in_array($response->getStatus(), array(100, 101)));
+
+ $this->request->setLastEvent('receivedHeaders', $response);
+
+ // No body possible in such responses
+ if (HTTP_Request2::METHOD_HEAD == $this->request->getMethod() ||
+ (HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() &&
+ 200 <= $response->getStatus() && 300 > $response->getStatus()) ||
+ in_array($response->getStatus(), array(204, 304))
+ ) {
+ return $response;
+ }
+
+ $chunked = 'chunked' == $response->getHeader('transfer-encoding');
+ $length = $response->getHeader('content-length');
+ $hasBody = false;
+ if ($chunked || null === $length || 0 < intval($length)) {
+ // RFC 2616, section 4.4:
+ // 3. ... If a message is received with both a
+ // Transfer-Encoding header field and a Content-Length header field,
+ // the latter MUST be ignored.
+ $toRead = ($chunked || null === $length)? null: $length;
+ $this->chunkLength = 0;
+
+ while (!feof($this->socket) && (is_null($toRead) || 0 < $toRead)) {
+ if ($chunked) {
+ $data = $this->readChunked($bufferSize);
+ } elseif (is_null($toRead)) {
+ $data = $this->fread($bufferSize);
+ } else {
+ $data = $this->fread(min($toRead, $bufferSize));
+ $toRead -= strlen($data);
+ }
+ if ('' == $data && (!$this->chunkLength || feof($this->socket))) {
+ break;
+ }
+
+ $hasBody = true;
+ if ($this->request->getConfig('store_body')) {
+ $response->appendBody($data);
+ }
+ if (!in_array($response->getHeader('content-encoding'), array('identity', null))) {
+ $this->request->setLastEvent('receivedEncodedBodyPart', $data);
+ } else {
+ $this->request->setLastEvent('receivedBodyPart', $data);
+ }
+ }
+ }
+
+ if ($hasBody) {
+ $this->request->setLastEvent('receivedBody', $response);
+ }
+ return $response;
+ }
+
+ /**
+ * Reads until either the end of the socket or a newline, whichever comes first
+ *
+ * Strips the trailing newline from the returned data, handles global
+ * request timeout. Method idea borrowed from Net_Socket PEAR package.
+ *
+ * @param int buffer size to use for reading
+ * @return Available data up to the newline (not including newline)
+ * @throws HTTP_Request2_Exception In case of timeout
+ */
+ protected function readLine($bufferSize)
+ {
+ $line = '';
+ while (!feof($this->socket)) {
+ if ($this->timeout) {
+ stream_set_timeout($this->socket, max($this->timeout - time(), 1));
+ }
+ $line .= @fgets($this->socket, $bufferSize);
+ $info = stream_get_meta_data($this->socket);
+ if ($info['timed_out'] || $this->timeout && time() > $this->timeout) {
+ throw new HTTP_Request2_Exception(
+ 'Request timed out after ' .
+ $this->request->getConfig('timeout') . ' second(s)'
+ );
+ }
+ if (substr($line, -1) == "\n") {
+ return rtrim($line, "\r\n");
+ }
+ }
+ return $line;
+ }
+
+ /**
+ * Wrapper around fread(), handles global request timeout
+ *
+ * @param int Reads up to this number of bytes
+ * @return Data read from socket
+ * @throws HTTP_Request2_Exception In case of timeout
+ */
+ protected function fread($length)
+ {
+ if ($this->timeout) {
+ stream_set_timeout($this->socket, max($this->timeout - time(), 1));
+ }
+ $data = fread($this->socket, $length);
+ $info = stream_get_meta_data($this->socket);
+ if ($info['timed_out'] || $this->timeout && time() > $this->timeout) {
+ throw new HTTP_Request2_Exception(
+ 'Request timed out after ' .
+ $this->request->getConfig('timeout') . ' second(s)'
+ );
+ }
+ return $data;
+ }
+
+ /**
+ * Reads a part of response body encoded with chunked Transfer-Encoding
+ *
+ * @param int buffer size to use for reading
+ * @return string
+ * @throws HTTP_Request2_Exception
+ */
+ protected function readChunked($bufferSize)
+ {
+ // at start of the next chunk?
+ if (0 == $this->chunkLength) {
+ $line = $this->readLine($bufferSize);
+ if (!preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
+ throw new HTTP_Request2_Exception(
+ "Cannot decode chunked response, invalid chunk length '{$line}'"
+ );
+ } else {
+ $this->chunkLength = hexdec($matches[1]);
+ // Chunk with zero length indicates the end
+ if (0 == $this->chunkLength) {
+ $this->readLine($bufferSize);
+ return '';
+ }
+ }
+ }
+ $data = $this->fread(min($this->chunkLength, $bufferSize));
+ $this->chunkLength -= strlen($data);
+ if (0 == $this->chunkLength) {
+ $this->readLine($bufferSize); // Trailing CRLF
+ }
+ return $data;
+ }
+}
+
?> \ No newline at end of file
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 01:25:33 +0000