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http_server.php
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/
http_server.php
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<?php
/**
* Jaxl (Jabber XMPP Library)
*
* Copyright (c) 2009-2012, Abhinav Singh <me@abhinavsingh.com>.
* 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.
*
* * Neither the name of Abhinav Singh nor the names of his
* contributors may 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, STRIC
* 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.
*
*/
require_once JAXL_CWD.'/core/jaxl_logger.php';
require_once JAXL_CWD.'/http/http_dispatcher.php';
require_once JAXL_CWD.'/http/http_request.php';
// carriage return and line feed
define('HTTP_CRLF', "\r\n");
// 1xx informational
define('HTTP_100', "Continue");
define('HTTP_101', "Switching Protocols");
// 2xx success
define('HTTP_200', "OK");
// 3xx redirection
define('HTTP_301', 'Moved Permanently');
define('HTTP_304', 'Not Modified');
// 4xx client error
define('HTTP_400', 'Bad Request');
define('HTTP_403', 'Forbidden');
define('HTTP_404', 'Not Found');
define('HTTP_405', 'Method Not Allowed');
define('HTTP_499', 'Client Closed Request'); // Nginx
// 5xx server error
define('HTTP_500', 'Internal Server Error');
define('HTTP_503', 'Service Unavailable');
class HTTPServer {
private $server = null;
public $cb = null;
private $dispatcher = null;
private $requests = array();
public function __construct($port=9699, $address="127.0.0.1") {
$path = 'tcp://'.$address.':'.$port;
$this->server = new JAXLSocketServer(
$path,
array(&$this, 'on_accept'),
array(&$this, 'on_request')
);
$this->dispatcher = new HTTPDispatcher();
}
public function __destruct() {
$this->server = null;
}
public function dispatch($rules) {
foreach($rules as $rule) {
$this->dispatcher->add_rule($rule);
}
}
public function start($cb=null) {
$this->cb = $cb;
JAXLLoop::run();
}
public function on_accept($sock, $addr) {
_debug("on_accept for client#$sock, addr:$addr");
// initialize new request obj
$request = new HTTPRequest($sock, $addr);
// setup sock cb
$request->set_sock_cb(
array(&$this->server, 'send'),
array(&$this->server, 'read'),
array(&$this->server, 'close')
);
// cache request object
$this->requests[$sock] = &$request;
// reactive client for further read
$this->server->read($sock);
}
public function on_request($sock, $raw) {
_debug("on_request for client#$sock");
$request = $this->requests[$sock];
// 'wait_for_body' state is reached when ever
// application calls recv_body() method
// on received $request object
if($request->state() == 'wait_for_body') {
$request->body($raw);
}
else {
// break on crlf
$lines = explode(HTTP_CRLF, $raw);
// parse request line
if($request->state() == 'wait_for_request_line') {
list($method, $resource, $version) = explode(" ", $lines[0]);
$request->line($method, $resource, $version);
unset($lines[0]);
_info($request->ip." ".$request->method." ".$request->resource." ".$request->version);
}
// parse headers
foreach($lines as $line) {
$line_parts = explode(":", $line);
if(sizeof($line_parts) > 1) {
if(strlen($line_parts[0]) > 0) {
$k = $line_parts[0];
unset($line_parts[0]);
$v = implode(":", $line_parts);
$request->set_header($k, $v);
}
}
else if(strlen(trim($line_parts[0])) == 0) {
$request->empty_line();
}
// if exploded line array size is 1
// and thr is something in $line_parts[0]
// must be request body
else {
$request->body($line);
}
}
}
// if request has reached 'headers_received' state?
if($request->state() == 'headers_received') {
// dispatch to any matching rule found
_debug("delegating to dispatcher for further routing");
$dispatched = $this->dispatcher->dispatch($request);
// if no dispatch rule matched call generic callback
if(!$dispatched && $this->cb) {
_debug("no dispatch rule matched, sending to generic callback");
call_user_func($this->cb, $request);
}
// else if not dispatched and not generic callbacked
// send 404 not_found
else if(!$dispatched) {
// TODO: send 404 if no callback is registered for this request
_debug("dropping request since no matching dispatch rule or generic callback was specified");
$request->not_found('404 Not Found');
}
}
// if state is not 'headers_received'
// reactivate client socket for read event
else {
$this->server->read($sock);
}
}
}
?>