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<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003, Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o 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.|
// | o 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. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@phpguru.org> |
// +-----------------------------------------------------------------------+
//
// $Id: Request.php,v 1.51 2006/10/25 16:23:31 avb Exp $
//
// HTTP_Request Class
//
// Simple example, (Fetches yahoo.com and displays it):
//
// $a = &new HTTP_Request('http://www.yahoo.com/');
// $a->sendRequest();
// echo $a->getResponseBody();
//
require_once 'PEAR.php';
require_once 'Net/Socket.php';
require_once 'Net/URL.php';
define('HTTP_REQUEST_METHOD_GET', 'GET', true);
define('HTTP_REQUEST_METHOD_HEAD', 'HEAD', true);
define('HTTP_REQUEST_METHOD_POST', 'POST', true);
define('HTTP_REQUEST_METHOD_PUT', 'PUT', true);
define('HTTP_REQUEST_METHOD_DELETE', 'DELETE', true);
define('HTTP_REQUEST_METHOD_OPTIONS', 'OPTIONS', true);
define('HTTP_REQUEST_METHOD_TRACE', 'TRACE', true);
define('HTTP_REQUEST_HTTP_VER_1_0', '1.0', true);
define('HTTP_REQUEST_HTTP_VER_1_1', '1.1', true);
class HTTP_Request {
/**
* Instance of Net_URL
* @var object Net_URL
*/
var $_url;
/**
* Type of request
* @var string
*/
var $_method;
/**
* HTTP Version
* @var string
*/
var $_http;
/**
* Request headers
* @var array
*/
var $_requestHeaders;
/**
* Basic Auth Username
* @var string
*/
var $_user;
/**
* Basic Auth Password
* @var string
*/
var $_pass;
/**
* Socket object
* @var object Net_Socket
*/
var $_sock;
/**
* Proxy server
* @var string
*/
var $_proxy_host;
/**
* Proxy port
* @var integer
*/
var $_proxy_port;
/**
* Proxy username
* @var string
*/
var $_proxy_user;
/**
* Proxy password
* @var string
*/
var $_proxy_pass;
/**
* Post data
* @var array
*/
var $_postData;
/**
* Request body
* @var string
*/
var $_body;
/**
* A list of methods that MUST NOT have a request body, per RFC 2616
* @var array
*/
var $_bodyDisallowed = array('TRACE');
/**
* Files to post
* @var array
*/
var $_postFiles = array();
/**
* Connection timeout.
* @var float
*/
var $_timeout;
/**
* HTTP_Response object
* @var object HTTP_Response
*/
var $_response;
/**
* Whether to allow redirects
* @var boolean
*/
var $_allowRedirects;
/**
* Maximum redirects allowed
* @var integer
*/
var $_maxRedirects;
/**
* Current number of redirects
* @var integer
*/
var $_redirects;
/**
* Whether to append brackets [] to array variables
* @var bool
*/
var $_useBrackets = true;
/**
* Attached listeners
* @var array
*/
var $_listeners = array();
/**
* Whether to save response body in response object property
* @var bool
*/
var $_saveBody = true;
/**
* Timeout for reading from socket (array(seconds, microseconds))
* @var array
*/
var $_readTimeout = null;
/**
* Options to pass to Net_Socket::connect. See stream_context_create
* @var array
*/
var $_socketOptions = null;
/**
* Constructor
*
* Sets up the object
* @param string The url to fetch/access
* @param array Associative array of parameters which can have the following keys:
* <ul>
* <li>method - Method to use, GET, POST etc (string)</li>
* <li>http - HTTP Version to use, 1.0 or 1.1 (string)</li>
* <li>user - Basic Auth username (string)</li>
* <li>pass - Basic Auth password (string)</li>
* <li>proxy_host - Proxy server host (string)</li>
* <li>proxy_port - Proxy server port (integer)</li>
* <li>proxy_user - Proxy auth username (string)</li>
* <li>proxy_pass - Proxy auth password (string)</li>
* <li>timeout - Connection timeout in seconds (float)</li>
* <li>allowRedirects - Whether to follow redirects or not (bool)</li>
* <li>maxRedirects - Max number of redirects to follow (integer)</li>
* <li>useBrackets - Whether to append [] to array variable names (bool)</li>
* <li>saveBody - Whether to save response body in response object property (bool)</li>
* <li>readTimeout - Timeout for reading / writing data over the socket (array (seconds, microseconds))</li>
* <li>socketOptions - Options to pass to Net_Socket object (array)</li>
* </ul>
* @access public
*/
function HTTP_Request($url = '', $params = array())
{
$this->_method = HTTP_REQUEST_METHOD_GET;
$this->_http = HTTP_REQUEST_HTTP_VER_1_1;
$this->_requestHeaders = array();
$this->_postData = array();
$this->_body = null;
$this->_user = null;
$this->_pass = null;
$this->_proxy_host = null;
$this->_proxy_port = null;
$this->_proxy_user = null;
$this->_proxy_pass = null;
$this->_allowRedirects = false;
$this->_maxRedirects = 3;
$this->_redirects = 0;
$this->_timeout = null;
$this->_response = null;
foreach ($params as $key => $value) {
$this->{'_' . $key} = $value;
}
if (!empty($url)) {
$this->setURL($url);
}
// Default useragent
$this->addHeader('User-Agent', 'PEAR HTTP_Request class ( http://pear.php.net/ )');
// We don't do keep-alives by default
$this->addHeader('Connection', 'close');
// Basic authentication
if (!empty($this->_user)) {
$this->addHeader('Authorization', 'Basic ' . base64_encode($this->_user . ':' . $this->_pass));
}
// Proxy authentication (see bug #5913)
if (!empty($this->_proxy_user)) {
$this->addHeader('Proxy-Authorization', 'Basic ' . base64_encode($this->_proxy_user . ':' . $this->_proxy_pass));
}
// Use gzip encoding if possible
// Avoid gzip encoding if using multibyte functions (see #1781)
if (HTTP_REQUEST_HTTP_VER_1_1 == $this->_http && extension_loaded('zlib') &&
0 == (2 & ini_get('mbstring.func_overload'))) {
$this->addHeader('Accept-Encoding', 'gzip');
}
}
/**
* Generates a Host header for HTTP/1.1 requests
*
* @access private
* @return string
*/
function _generateHostHeader()
{
if ($this->_url->port != 80 AND strcasecmp($this->_url->protocol, 'http') == 0) {
$host = $this->_url->host . ':' . $this->_url->port;
} elseif ($this->_url->port != 443 AND strcasecmp($this->_url->protocol, 'https') == 0) {
$host = $this->_url->host . ':' . $this->_url->port;
} elseif ($this->_url->port == 443 AND strcasecmp($this->_url->protocol, 'https') == 0 AND strpos($this->_url->url, ':443') !== false) {
$host = $this->_url->host . ':' . $this->_url->port;
} else {
$host = $this->_url->host;
}
return $host;
}
/**
* Resets the object to its initial state (DEPRECATED).
* Takes the same parameters as the constructor.
*
* @param string $url The url to be requested
* @param array $params Associative array of parameters
* (see constructor for details)
* @access public
* @deprecated deprecated since 1.2, call the constructor if this is necessary
*/
function reset($url, $params = array())
{
$this->HTTP_Request($url, $params);
}
/**
* Sets the URL to be requested
*
* @param string The url to be requested
* @access public
*/
function setURL($url)
{
$this->_url = &new Net_URL($url, $this->_useBrackets);
if (!empty($this->_url->user) || !empty($this->_url->pass)) {
$this->setBasicAuth($this->_url->user, $this->_url->pass);
}
if (HTTP_REQUEST_HTTP_VER_1_1 == $this->_http) {
$this->addHeader('Host', $this->_generateHostHeader());
}
// set '/' instead of empty path rather than check later (see bug #8662)
if (empty($this->_url->path)) {
$this->_url->path = '/';
}
}
/**
* Returns the current request URL
*
* @return string Current request URL
* @access public
*/
function getUrl($url)
{
return empty($this->_url)? '': $this->_url->getUrl();
}
/**
* Sets a proxy to be used
*
* @param string Proxy host
* @param int Proxy port
* @param string Proxy username
* @param string Proxy password
* @access public
*/
function setProxy($host, $port = 8080, $user = null, $pass = null)
{
$this->_proxy_host = $host;
$this->_proxy_port = $port;
$this->_proxy_user = $user;
$this->_proxy_pass = $pass;
if (!empty($user)) {
$this->addHeader('Proxy-Authorization', 'Basic ' . base64_encode($user . ':' . $pass));
}
}
/**
* Sets basic authentication parameters
*
* @param string Username
* @param string Password
*/
function setBasicAuth($user, $pass)
{
$this->_user = $user;
$this->_pass = $pass;
$this->addHeader('Authorization', 'Basic ' . base64_encode($user . ':' . $pass));
}
/**
* Sets the method to be used, GET, POST etc.
*
* @param string Method to use. Use the defined constants for this
* @access public
*/
function setMethod($method)
{
$this->_method = $method;
}
/**
* Sets the HTTP version to use, 1.0 or 1.1
*
* @param string Version to use. Use the defined constants for this
* @access public
*/
function setHttpVer($http)
{
$this->_http = $http;
}
/**
* Adds a request header
*
* @param string Header name
* @param string Header value
* @access public
*/
function addHeader($name, $value)
{
$this->_requestHeaders[strtolower($name)] = $value;
}
/**
* Removes a request header
*
* @param string Header name to remove
* @access public
*/
function removeHeader($name)
{
if (isset($this->_requestHeaders[strtolower($name)])) {
unset($this->_requestHeaders[strtolower($name)]);
}
}
/**
* Adds a querystring parameter
*
* @param string Querystring parameter name
* @param string Querystring parameter value
* @param bool Whether the value is already urlencoded or not, default = not
* @access public
*/
function addQueryString($name, $value, $preencoded = false)
{
$this->_url->addQueryString($name, $value, $preencoded);
}
/**
* Sets the querystring to literally what you supply
*
* @param string The querystring data. Should be of the format foo=bar&x=y etc
* @param bool Whether data is already urlencoded or not, default = already encoded
* @access public
*/
function addRawQueryString($querystring, $preencoded = true)
{
$this->_url->addRawQueryString($querystring, $preencoded);
}
/**
* Adds postdata items
*
* @param string Post data name
* @param string Post data value
* @param bool Whether data is already urlencoded or not, default = not
* @access public
*/
function addPostData($name, $value, $preencoded = false)
{
if ($preencoded) {
$this->_postData[$name] = $value;
} else {
$this->_postData[$name] = $this->_arrayMapRecursive('urlencode', $value);
}
}
/**
* Recursively applies the callback function to the value
*
* @param mixed Callback function
* @param mixed Value to process
* @access private
* @return mixed Processed value
*/
function _arrayMapRecursive($callback, $value)
{
if (!is_array($value)) {
return call_user_func($callback, $value);
} else {
$map = array();
foreach ($value as $k => $v) {
$map[$k] = $this->_arrayMapRecursive($callback, $v);
}
return $map;
}
}
/**
* Adds a file to upload
*
* This also changes content-type to 'multipart/form-data' for proper upload
*
* @access public
* @param string name of file-upload field
* @param mixed file name(s)
* @param mixed content-type(s) of file(s) being uploaded
* @return bool true on success
* @throws PEAR_Error
*/
function addFile($inputName, $fileName, $contentType = 'application/octet-stream')
{
if (!is_array($fileName) && !is_readable($fileName)) {
return PEAR::raiseError("File '{$fileName}' is not readable");
} elseif (is_array($fileName)) {
foreach ($fileName as $name) {
if (!is_readable($name)) {
return PEAR::raiseError("File '{$name}' is not readable");
}
}
}
$this->addHeader('Content-Type', 'multipart/form-data');
$this->_postFiles[$inputName] = array(
'name' => $fileName,
'type' => $contentType
);
return true;
}
/**
* Adds raw postdata (DEPRECATED)
*
* @param string The data
* @param bool Whether data is preencoded or not, default = already encoded
* @access public
* @deprecated deprecated since 1.3.0, method setBody() should be used instead
*/
function addRawPostData($postdata, $preencoded = true)
{
$this->_body = $preencoded ? $postdata : urlencode($postdata);
}
/**
* Sets the request body (for POST, PUT and similar requests)
*
* @param string Request body
* @access public
*/
function setBody($body)
{
$this->_body = $body;
}
/**
* Clears any postdata that has been added (DEPRECATED).
*
* Useful for multiple request scenarios.
*
* @access public
* @deprecated deprecated since 1.2
*/
function clearPostData()
{
$this->_postData = null;
}
/**
* Appends a cookie to "Cookie:" header
*
* @param string $name cookie name
* @param string $value cookie value
* @access public
*/
function addCookie($name, $value)
{
$cookies = isset($this->_requestHeaders['cookie']) ? $this->_requestHeaders['cookie']. '; ' : '';
$this->addHeader('Cookie', $cookies . $name . '=' . $value);
}
/**
* Clears any cookies that have been added (DEPRECATED).
*
* Useful for multiple request scenarios
*
* @access public
* @deprecated deprecated since 1.2
*/
function clearCookies()
{
$this->removeHeader('Cookie');
}
/**
* Sends the request
*
* @access public
* @param bool Whether to store response body in Response object property,
* set this to false if downloading a LARGE file and using a Listener
* @return mixed PEAR error on error, true otherwise
*/
function sendRequest($saveBody = true)
{
if (!is_a($this->_url, 'Net_URL')) {
return PEAR::raiseError('No URL given.');
}
$host = isset($this->_proxy_host) ? $this->_proxy_host : $this->_url->host;
$port = isset($this->_proxy_port) ? $this->_proxy_port : $this->_url->port;
// 4.3.0 supports SSL connections using OpenSSL. The function test determines
// we running on at least 4.3.0
if (strcasecmp($this->_url->protocol, 'https') == 0 AND function_exists('file_get_contents') AND extension_loaded('openssl')) {
if (isset($this->_proxy_host)) {
return PEAR::raiseError('HTTPS proxies are not supported.');
}
$host = 'ssl://' . $host;
}
// magic quotes may fuck up file uploads and chunked response processing
$magicQuotes = ini_get('magic_quotes_runtime');
ini_set('magic_quotes_runtime', false);
// RFC 2068, section 19.7.1: A client MUST NOT send the Keep-Alive
// connection token to a proxy server...
if (isset($this->_proxy_host) && !empty($this->_requestHeaders['connection']) &&
'Keep-Alive' == $this->_requestHeaders['connection'])
{
$this->removeHeader('connection');
}
$keepAlive = (HTTP_REQUEST_HTTP_VER_1_1 == $this->_http && empty($this->_requestHeaders['connection'])) ||
(!empty($this->_requestHeaders['connection']) && 'Keep-Alive' == $this->_requestHeaders['connection']);
$sockets = &PEAR::getStaticProperty('HTTP_Request', 'sockets');
$sockKey = $host . ':' . $port;
unset($this->_sock);
// There is a connected socket in the "static" property?
if ($keepAlive && !empty($sockets[$sockKey]) &&
!empty($sockets[$sockKey]->fp))
{
$this->_sock =& $sockets[$sockKey];
$err = null;
} else {
$this->_notify('connect');
$this->_sock =& new Net_Socket();
$err = $this->_sock->connect($host, $port, null, $this->_timeout, $this->_socketOptions);
}
PEAR::isError($err) or $err = $this->_sock->write($this->_buildRequest());
if (!PEAR::isError($err)) {
if (!empty($this->_readTimeout)) {
$this->_sock->setTimeout($this->_readTimeout[0], $this->_readTimeout[1]);
}
$this->_notify('sentRequest');
// Read the response
$this->_response = &new HTTP_Response($this->_sock, $this->_listeners);
$err = $this->_response->process(
$this->_saveBody && $saveBody,
HTTP_REQUEST_METHOD_HEAD != $this->_method
);
if ($keepAlive) {
$keepAlive = (isset($this->_response->_headers['content-length'])
|| (isset($this->_response->_headers['transfer-encoding'])
&& strtolower($this->_response->_headers['transfer-encoding']) == 'chunked'));
if ($keepAlive) {
if (isset($this->_response->_headers['connection'])) {
$keepAlive = strtolower($this->_response->_headers['connection']) == 'keep-alive';
} else {
$keepAlive = 'HTTP/'.HTTP_REQUEST_HTTP_VER_1_1 == $this->_response->_protocol;
}
}
}
}
ini_set('magic_quotes_runtime', $magicQuotes);
if (PEAR::isError($err)) {
return $err;
}
if (!$keepAlive) {
$this->disconnect();
// Store the connected socket in "static" property
} elseif (empty($sockets[$sockKey]) || empty($sockets[$sockKey]->fp)) {
$sockets[$sockKey] =& $this->_sock;
}
// Check for redirection
if ( $this->_allowRedirects
AND $this->_redirects <= $this->_maxRedirects
AND $this->getResponseCode() > 300
AND $this->getResponseCode() < 399
AND !empty($this->_response->_headers['location'])) {
$redirect = $this->_response->_headers['location'];
// Absolute URL
if (preg_match('/^https?:\/\//i', $redirect)) {
$this->_url = &new Net_URL($redirect);
$this->addHeader('Host', $this->_generateHostHeader());
// Absolute path
} elseif ($redirect{0} == '/') {
$this->_url->path = $redirect;
// Relative path
} elseif (substr($redirect, 0, 3) == '../' OR substr($redirect, 0, 2) == './') {
if (substr($this->_url->path, -1) == '/') {
$redirect = $this->_url->path . $redirect;
} else {
$redirect = dirname($this->_url->path) . '/' . $redirect;
}
$redirect = Net_URL::resolvePath($redirect);
$this->_url->path = $redirect;
// Filename, no path
} else {
if (substr($this->_url->path, -1) == '/') {
$redirect = $this->_url->path . $redirect;
} else {
$redirect = dirname($this->_url->path) . '/' . $redirect;
}
$this->_url->path = $redirect;
}
$this->_redirects++;
return $this->sendRequest($saveBody);
// Too many redirects
} elseif ($this->_allowRedirects AND $this->_redirects > $this->_maxRedirects) {
return PEAR::raiseError('Too many redirects');
}
return true;
}
/**
* Disconnect the socket, if connected. Only useful if using Keep-Alive.
*
* @access public
*/
function disconnect()
{
if (!empty($this->_sock) && !empty($this->_sock->fp)) {
$this->_notify('disconnect');
$this->_sock->disconnect();
}
}
/**
* Returns the response code
*
* @access public
* @return mixed Response code, false if not set
*/
function getResponseCode()
{
return isset($this->_response->_code) ? $this->_response->_code : false;
}
/**
* Returns either the named header or all if no name given
*
* @access public
* @param string The header name to return, do not set to get all headers
* @return mixed either the value of $headername (false if header is not present)
* or an array of all headers
*/
function getResponseHeader($headername = null)
{
if (!isset($headername)) {
return isset($this->_response->_headers)? $this->_response->_headers: array();
} else {
$headername = strtolower($headername);
return isset($this->_response->_headers[$headername]) ? $this->_response->_headers[$headername] : false;
}
}
/**
* Returns the body of the response
*
* @access public
* @return mixed response body, false if not set
*/
function getResponseBody()
{
return isset($this->_response->_body) ? $this->_response->_body : false;
}
/**
* Returns cookies set in response
*
* @access public
* @return mixed array of response cookies, false if none are present
*/
function getResponseCookies()
{
return isset($this->_response->_cookies) ? $this->_response->_cookies : false;
}
/**
* Builds the request string
*
* @access private
* @return string The request string
*/
function _buildRequest()
{
$separator = ini_get('arg_separator.output');
ini_set('arg_separator.output', '&');
$querystring = ($querystring = $this->_url->getQueryString()) ? '?' . $querystring : '';
ini_set('arg_separator.output', $separator);
$host = isset($this->_proxy_host) ? $this->_url->protocol . '://' . $this->_url->host : '';
$port = (isset($this->_proxy_host) AND $this->_url->port != 80) ? ':' . $this->_url->port : '';
$path = $this->_url->path . $querystring;
$url = $host . $port . $path;
$request = $this->_method . ' ' . $url . ' HTTP/' . $this->_http . "\r\n";
if (in_array($this->_method, $this->_bodyDisallowed) ||
(empty($this->_body) && (HTTP_REQUEST_METHOD_POST != $this->_method ||
(empty($this->_postData) && empty($this->_postFiles)))))
{
$this->removeHeader('Content-Type');
} else {
if (empty($this->_requestHeaders['content-type'])) {
// Add default content-type
$this->addHeader('Content-Type', 'application/x-www-form-urlencoded');
} elseif ('multipart/form-data' == $this->_requestHeaders['content-type']) {
$boundary = 'HTTP_Request_' . md5(uniqid('request') . microtime());
$this->addHeader('Content-Type', 'multipart/form-data; boundary=' . $boundary);
}
}
// Request Headers
if (!empty($this->_requestHeaders)) {
foreach ($this->_requestHeaders as $name => $value) {
$canonicalName = implode('-', array_map('ucfirst', explode('-', $name)));
$request .= $canonicalName . ': ' . $value . "\r\n";
}
}
// No post data or wrong method, so simply add a final CRLF
if (in_array($this->_method, $this->_bodyDisallowed) ||
(HTTP_REQUEST_METHOD_POST != $this->_method && empty($this->_body))) {
$request .= "\r\n";
// Post data if it's an array
} elseif (HTTP_REQUEST_METHOD_POST == $this->_method &&
(!empty($this->_postData) || !empty($this->_postFiles))) {
// "normal" POST request
if (!isset($boundary)) {
$postdata = implode('&', array_map(
create_function('$a', 'return $a[0] . \'=\' . $a[1];'),
$this->_flattenArray('', $this->_postData)
));
// multipart request, probably with file uploads
} else {
$postdata = '';
if (!empty($this->_postData)) {
$flatData = $this->_flattenArray('', $this->_postData);
foreach ($flatData as $item) {
$postdata .= '--' . $boundary . "\r\n";
$postdata .= 'Content-Disposition: form-data; name="' . $item[0] . '"';
$postdata .= "\r\n\r\n" . urldecode($item[1]) . "\r\n";
}
}
foreach ($this->_postFiles as $name => $value) {
if (is_array($value['name'])) {
$varname = $name . ($this->_useBrackets? '[]': '');
} else {
$varname = $name;
$value['name'] = array($value['name']);
}
foreach ($value['name'] as $key => $filename) {
$fp = fopen($filename, 'r');
$data = fread($fp, filesize($filename));
fclose($fp);
$basename = basename($filename);
$type = is_array($value['type'])? @$value['type'][$key]: $value['type'];
$postdata .= '--' . $boundary . "\r\n";
$postdata .= 'Content-Disposition: form-data; name="' . $varname . '"; filename="' . $basename . '"';
$postdata .= "\r\nContent-Type: " . $type;
$postdata .= "\r\n\r\n" . $data . "\r\n";
}
}
$postdata .= '--' . $boundary . "--\r\n";
}
$request .= 'Content-Length: ' . strlen($postdata) . "\r\n\r\n";
$request .= $postdata;
// Explicitly set request body
} elseif (!empty($this->_body)) {
$request .= 'Content-Length: ' . strlen($this->_body) . "\r\n\r\n";
$request .= $this->_body;
}
return $request;
}
/**
* Helper function to change the (probably multidimensional) associative array
* into the simple one.
*
* @param string name for item
* @param mixed item's values
* @return array array with the following items: array('item name', 'item value');
*/
function _flattenArray($name, $values)
{
if (!is_array($values)) {
return array(array($name, $values));
} else {
$ret = array();
foreach ($values as $k => $v) {
if (empty($name)) {
$newName = $k;
} elseif ($this->_useBrackets) {
$newName = $name . '[' . $k . ']';
} else {
$newName = $name;
}
$ret = array_merge($ret, $this->_flattenArray($newName, $v));
}
return $ret;
}
}
/**
* Adds a Listener to the list of listeners that are notified of
* the object's events
*
* @param object HTTP_Request_Listener instance to attach
* @return boolean whether the listener was successfully attached
* @access public
*/
function attach(&$listener)
{
if (!is_a($listener, 'HTTP_Request_Listener')) {
return false;
}
$this->_listeners[$listener->getId()] =& $listener;
return true;
}
/**
* Removes a Listener from the list of listeners
*
* @param object HTTP_Request_Listener instance to detach
* @return boolean whether the listener was successfully detached
* @access public
*/
function detach(&$listener)
{
if (!is_a($listener, 'HTTP_Request_Listener') ||
!isset($this->_listeners[$listener->getId()])) {
return false;
}
unset($this->_listeners[$listener->getId()]);
return true;
}
/**
* Notifies all registered listeners of an event.
*
* Events sent by HTTP_Request object
* - 'connect': on connection to server
* - 'sentRequest': after the request was sent
* - 'disconnect': on disconnection from server
*
* Events sent by HTTP_Response object
* - 'gotHeaders': after receiving response headers (headers are passed in $data)
* - 'tick': on receiving a part of response body (the part is passed in $data)
* - 'gzTick': on receiving a gzip-encoded part of response body (ditto)
* - 'gotBody': after receiving the response body (passes the decoded body in $data if it was gzipped)
*
* @param string Event name
* @param mixed Additional data
* @access private
*/
function _notify($event, $data = null)
{
foreach (array_keys($this->_listeners) as $id) {
$this->_listeners[$id]->update($this, $event, $data);
}
}
}
/**
* Response class to complement the Request class
*/
class HTTP_Response
{
/**
* Socket object
* @var object
*/
var $_sock;
/**
* Protocol
* @var string
*/
var $_protocol;
/**
* Return code
* @var string
*/
var $_code;
/**
* Response headers
* @var array
*/
var $_headers;
/**
* Cookies set in response
* @var array
*/
var $_cookies;
/**
* Response body
* @var string
*/
var $_body = '';
/**
* Used by _readChunked(): remaining length of the current chunk
* @var string
*/
var $_chunkLength = 0;
/**
* Attached listeners
* @var array
*/
var $_listeners = array();
/**
* Bytes left to read from message-body
* @var null|int
*/
var $_toRead;
/**
* Constructor
*
* @param object Net_Socket socket to read the response from
* @param array listeners attached to request
* @return mixed PEAR Error on error, true otherwise
*/
function HTTP_Response(&$sock, &$listeners)
{
$this->_sock =& $sock;
$this->_listeners =& $listeners;
}
/**
* Processes a HTTP response
*
* This extracts response code, headers, cookies and decodes body if it
* was encoded in some way
*
* @access public
* @param bool Whether to store response body in object property, set
* this to false if downloading a LARGE file and using a Listener.
* This is assumed to be true if body is gzip-encoded.
* @param bool Whether the response can actually have a message-body.
* Will be set to false for HEAD requests.
* @throws PEAR_Error
* @return mixed true on success, PEAR_Error in case of malformed response
*/
function process($saveBody = true, $canHaveBody = true)
{
do {
$line = $this->_sock->readLine();
if (sscanf($line, 'HTTP/%s %s', $http_version, $returncode) != 2) {
return PEAR::raiseError('Malformed response.');
} else {
$this->_protocol = 'HTTP/' . $http_version;
$this->_code = intval($returncode);
}
while ('' !== ($header = $this->_sock->readLine())) {
$this->_processHeader($header);
}
} while (100 == $this->_code);
$this->_notify('gotHeaders', $this->_headers);
// RFC 2616, section 4.4:
// 1. Any response message which "MUST NOT" include a message-body ...
// is always terminated by the first empty line after the header fields
// 3. ... If a message is received with both a
// Transfer-Encoding header field and a Content-Length header field,
// the latter MUST be ignored.
$canHaveBody = $canHaveBody && $this->_code >= 200 &&
$this->_code != 204 && $this->_code != 304;
// If response body is present, read it and decode
$chunked = isset($this->_headers['transfer-encoding']) && ('chunked' == $this->_headers['transfer-encoding']);
$gzipped = isset($this->_headers['content-encoding']) && ('gzip' == $this->_headers['content-encoding']);
$hasBody = false;
if ($canHaveBody && ($chunked || !isset($this->_headers['content-length']) ||
0 != $this->_headers['content-length']))
{
if ($chunked || !isset($this->_headers['content-length'])) {
$this->_toRead = null;
} else {
$this->_toRead = $this->_headers['content-length'];
}
while (!$this->_sock->eof() && (is_null($this->_toRead) || 0 < $this->_toRead)) {
if ($chunked) {
$data = $this->_readChunked();
} elseif (is_null($this->_toRead)) {
$data = $this->_sock->read(4096);
} else {
$data = $this->_sock->read(min(4096, $this->_toRead));
$this->_toRead -= strlen($data);
}
if ('' == $data) {
break;
} else {
$hasBody = true;
if ($saveBody || $gzipped) {
$this->_body .= $data;
}
$this->_notify($gzipped? 'gzTick': 'tick', $data);
}
}
}
if ($hasBody) {
// Uncompress the body if needed
if ($gzipped) {
$body = $this->_decodeGzip($this->_body);
if (PEAR::isError($body)) {
return $body;
}
$this->_body = $body;
$this->_notify('gotBody', $this->_body);
} else {
$this->_notify('gotBody');
}
}
return true;
}
/**
* Processes the response header
*
* @access private
* @param string HTTP header
*/
function _processHeader($header)
{
if (false === strpos($header, ':')) {
return;
}
list($headername, $headervalue) = explode(':', $header, 2);
$headername = strtolower($headername);
$headervalue = ltrim($headervalue);
if ('set-cookie' != $headername) {
if (isset($this->_headers[$headername])) {
$this->_headers[$headername] .= ',' . $headervalue;
} else {
$this->_headers[$headername] = $headervalue;
}
} else {
$this->_parseCookie($headervalue);
}
}
/**
* Parse a Set-Cookie header to fill $_cookies array
*
* @access private
* @param string value of Set-Cookie header
*/
function _parseCookie($headervalue)
{
$cookie = array(
'expires' => null,
'domain' => null,
'path' => null,
'secure' => false
);
// Only a name=value pair
if (!strpos($headervalue, ';')) {
$pos = strpos($headervalue, '=');
$cookie['name'] = trim(substr($headervalue, 0, $pos));
$cookie['value'] = trim(substr($headervalue, $pos + 1));
// Some optional parameters are supplied
} else {
$elements = explode(';', $headervalue);
$pos = strpos($elements[0], '=');
$cookie['name'] = trim(substr($elements[0], 0, $pos));
$cookie['value'] = trim(substr($elements[0], $pos + 1));
for ($i = 1; $i < count($elements); $i++) {
if (false === strpos($elements[$i], '=')) {
$elName = trim($elements[$i]);
$elValue = null;
} else {
list ($elName, $elValue) = array_map('trim', explode('=', $elements[$i]));
}
$elName = strtolower($elName);
if ('secure' == $elName) {
$cookie['secure'] = true;
} elseif ('expires' == $elName) {
$cookie['expires'] = str_replace('"', '', $elValue);
} elseif ('path' == $elName || 'domain' == $elName) {
$cookie[$elName] = urldecode($elValue);
} else {
$cookie[$elName] = $elValue;
}
}
}
$this->_cookies[] = $cookie;
}
/**
* Read a part of response body encoded with chunked Transfer-Encoding
*
* @access private
* @return string
*/
function _readChunked()
{
// at start of the next chunk?
if (0 == $this->_chunkLength) {
$line = $this->_sock->readLine();
if (preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
$this->_chunkLength = hexdec($matches[1]);
// Chunk with zero length indicates the end
if (0 == $this->_chunkLength) {
$this->_sock->readLine(); // make this an eof()
return '';
}
} else {
return '';
}
}
$data = $this->_sock->read($this->_chunkLength);
$this->_chunkLength -= strlen($data);
if (0 == $this->_chunkLength) {
$this->_sock->readLine(); // Trailing CRLF
}
return $data;
}
/**
* Notifies all registered listeners of an event.
*
* @param string Event name
* @param mixed Additional data
* @access private
* @see HTTP_Request::_notify()
*/
function _notify($event, $data = null)
{
foreach (array_keys($this->_listeners) as $id) {
$this->_listeners[$id]->update($this, $event, $data);
}
}
/**
* Decodes the message-body encoded by gzip
*
* The real decoding work is done by gzinflate() built-in function, this
* method only parses the header and checks data for compliance with
* RFC 1952
*
* @access private
* @param string gzip-encoded data
* @return string decoded data
*/
function _decodeGzip($data)
{
$length = strlen($data);
// If it doesn't look like gzip-encoded data, don't bother
if (18 > $length || strcmp(substr($data, 0, 2), "\x1f\x8b")) {
return $data;
}
$method = ord(substr($data, 2, 1));
if (8 != $method) {
return PEAR::raiseError('_decodeGzip(): unknown compression method');
}
$flags = ord(substr($data, 3, 1));
if ($flags & 224) {
return PEAR::raiseError('_decodeGzip(): reserved bits are set');
}
// header is 10 bytes minimum. may be longer, though.
$headerLength = 10;
// extra fields, need to skip 'em
if ($flags & 4) {
if ($length - $headerLength - 2 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$extraLength = unpack('v', substr($data, 10, 2));
if ($length - $headerLength - 2 - $extraLength[1] < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$headerLength += $extraLength[1] + 2;
}
// file name, need to skip that
if ($flags & 8) {
if ($length - $headerLength - 1 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$filenameLength = strpos(substr($data, $headerLength), chr(0));
if (false === $filenameLength || $length - $headerLength - $filenameLength - 1 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$headerLength += $filenameLength + 1;
}
// comment, need to skip that also
if ($flags & 16) {
if ($length - $headerLength - 1 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$commentLength = strpos(substr($data, $headerLength), chr(0));
if (false === $commentLength || $length - $headerLength - $commentLength - 1 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$headerLength += $commentLength + 1;
}
// have a CRC for header. let's check
if ($flags & 1) {
if ($length - $headerLength - 2 < 8) {
return PEAR::raiseError('_decodeGzip(): data too short');
}
$crcReal = 0xffff & crc32(substr($data, 0, $headerLength));
$crcStored = unpack('v', substr($data, $headerLength, 2));
if ($crcReal != $crcStored[1]) {
return PEAR::raiseError('_decodeGzip(): header CRC check failed');
}
$headerLength += 2;
}
// unpacked data CRC and size at the end of encoded data
$tmp = unpack('V2', substr($data, -8));
$dataCrc = $tmp[1];
$dataSize = $tmp[2];
// finally, call the gzinflate() function
$unpacked = @gzinflate(substr($data, $headerLength, -8), $dataSize);
if (false === $unpacked) {
return PEAR::raiseError('_decodeGzip(): gzinflate() call failed');
} elseif ($dataSize != strlen($unpacked)) {
return PEAR::raiseError('_decodeGzip(): data size check failed');
} elseif ($dataCrc != crc32($unpacked)) {
return PEAR::raiseError('_decodeGzip(): data CRC check failed');
}
return $unpacked;
}
} // End class HTTP_Response
?>
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