request.php

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            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
    * 'sentRequest': after the request was sent
    * 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();

    /**
    * 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.
    * @throws PEAR_Error
    * @return mixed     true on success, PEAR_Error in case of malformed response
    */
    function process($saveBody = 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);

        // 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']);
        $hasBody = false;
        if (!isset($this->_headers['content-length']) || 0 != $this->_headers['content-length']) {
            while (!$this->_sock->eof()) {
                if ($chunked) {
                    $data = $this->_readChunked();
                } else {
                    $data = $this->_sock->read(4096);
                }
                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) {
                $this->_body = gzinflate(substr($this->_body, 10));
                $this->_notify('gotBody', $this->_body);
            } else {
                $this->_notify('gotBody');
            }
        }
        return true;
    }


   /**
    * Processes the response header
    *
    * @access private
    * @param  string    HTTP header
    */
    function _processHeader($header)
    {
        list($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);
        }
    }
} // End class HTTP_Response
?>