/**
* 处理websocket握手
* @param string $buffer
* @param TcpConnection $connection
* @return int
*/
protected static function dealHandshake($buffer, $connection)
{
// 握手阶段客户端发送HTTP协议
if (0 === strpos($buffer, 'GET')) {
// 判断\r\n\r\n边界
$heder_end_pos = strpos($buffer, "\r\n\r\n");
if (!$heder_end_pos) {
return 0;
}
// 解析Sec-WebSocket-Key
$Sec_WebSocket_Key = '';
if (preg_match("/Sec-WebSocket-Key: *(.*?)\r\n/", $buffer, $match)) {
$Sec_WebSocket_Key = $match[1];
} else {
$connection->send("HTTP/1.1 400 Bad Request\r\n\r\n<b>400 Bad Request</b><br>Sec-WebSocket-Key not found", true);
$connection->close();
return 0;
}
$new_key = base64_encode(sha1($Sec_WebSocket_Key . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));
// 握手返回的数据
$new_message = "HTTP/1.1 101 Switching Protocols\r\n";
$new_message .= "Upgrade: websocket\r\n";
$new_message .= "Sec-WebSocket-Version: 13\r\n";
$new_message .= "Connection: Upgrade\r\n";
$new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";
$connection->websocketHandshake = true;
$connection->websocketDataBuffer = '';
$connection->websocketCurrentFrameLength = 0;
$connection->websocketCurrentFrameBuffer = '';
$connection->consumeRecvBuffer(strlen($buffer));
$connection->send($new_message, true);
// blob or arraybuffer
$connection->websocketType = self::BINARY_TYPE_BLOB;
// 如果有设置onWebSocketConnect回调，尝试执行
if (isset($connection->onWebSocketConnect)) {
self::parseHttpHeader($buffer);
try {
call_user_func($connection->onWebSocketConnect, $connection, $buffer);
} catch (\Exception $e) {
echo $e;
}
$_GET = $_COOKIE = $_SERVER = array();
}
return 0;
} elseif (0 === strpos($buffer, '<polic')) {
$policy_xml = '<?xml version="1.0"?><cross-domain-policy><site-control permitted-cross-domain-policies="all"/><allow-access-from domain="*" to-ports="*"/></cross-domain-policy>' . "";
$connection->send($policy_xml, true);
$connection->consumeRecvBuffer(strlen($buffer));
return 0;
}
// 出错
$connection->send("HTTP/1.1 400 Bad Request\r\n\r\n<b>400 Bad Request</b><br>Invalid handshake data for websocket. ", true);
$connection->close();
return 0;
}
/**
* 发送数据给worker进程
* @param int $cmd
* @param TcpConnection $connection
* @param mixed $body
*/
protected function sendToWorker($cmd, $connection, $body = '')
{
$gateway_data = $connection->gatewayHeader;
$gateway_data['cmd'] = $cmd;
$gateway_data['body'] = $body;
$gateway_data['ext_data'] = $connection->session;
// 随机选择一个worker处理
$key = array_rand($this->_workerConnections);
if ($key) {
if (false === $this->_workerConnections[$key]->send($gateway_data)) {
$msg = "SendBufferToWorker fail. May be the send buffer are overflow";
$this->log($msg);
return false;
}
} else {
$msg = "SendBufferToWorker fail. The connections between Gateway and BusinessWorker are not ready";
$this->log($msg);
$connection->close();
return false;
}
return true;
}
/**
* Emit when http message coming.
* @param TcpConnection $connection
* @param mixed $data
* @return void
*/
public function onMessage($connection, $data)
{
// REQUEST_URI.
$url_info = parse_url($_SERVER['REQUEST_URI']);
if (!$url_info) {
Http::header('HTTP/1.1 400 Bad Request');
return $connection->close('<h1>400 Bad Request</h1>');
}
$path = $url_info['path'];
$path_info = pathinfo($path);
$extension = isset($path_info['extension']) ? $path_info['extension'] : '';
if ($extension === '') {
$path = ($len = strlen($path)) && $path[$len - 1] === '/' ? $path . 'index.php' : $path . '/index.php';
$extension = 'php';
}
$root_dir = isset($this->serverRoot[$_SERVER['HTTP_HOST']]) ? $this->serverRoot[$_SERVER['HTTP_HOST']] : current($this->serverRoot);
$file = "{$root_dir}/{$path}";
if ($extension === 'php' && !is_file($file)) {
$file = "{$root_dir}/index.php";
if (!is_file($file)) {
$file = "{$root_dir}/index.html";
$extension = 'html';
}
}
// File exsits.
if (is_file($file)) {
// Security check.
if (!($request_realpath = realpath($file)) || !($root_dir_realpath = realpath($root_dir)) || 0 !== strpos($request_realpath, $root_dir_realpath)) {
Http::header('HTTP/1.1 400 Bad Request');
return $connection->close('<h1>400 Bad Request</h1>');
}
$file = realpath($file);
// Request php file.
if ($extension === 'php') {
$cwd = getcwd();
chdir($root_dir);
ini_set('display_errors', 'off');
ob_start();
// Try to include php file.
try {
// $_SERVER.
$_SERVER['REMOTE_ADDR'] = $connection->getRemoteIp();
$_SERVER['REMOTE_PORT'] = $connection->getRemotePort();
include $file;
} catch (\Exception $e) {
// Jump_exit?
if ($e->getMessage() != 'jump_exit') {
echo $e;
}
}
$content = ob_get_clean();
ini_set('display_errors', 'on');
$connection->close($content);
chdir($cwd);
return;
}
// Static resource file request.
if (isset(self::$mimeTypeMap[$extension])) {
Http::header('Content-Type: ' . self::$mimeTypeMap[$extension]);
} else {
Http::header('Content-Type: ' . self::$defaultMimeType);
}
// Get file stat.
$info = stat($file);
$modified_time = $info ? date('D, d M Y H:i:s', $info['mtime']) . ' GMT' : '';
if (!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $info) {
// Http 304.
if ($modified_time === $_SERVER['HTTP_IF_MODIFIED_SINCE']) {
// 304
Http::header('HTTP/1.1 304 Not Modified');
// Send nothing but http headers..
return $connection->close('');
}
}
if ($modified_time) {
Http::header("Last-Modified: {$modified_time}");
}
// Send to client.
return $connection->close(file_get_contents($file));
} else {
// 404
Http::header("HTTP/1.1 404 Not Found");
return $connection->close('<html><head><title>404 File not found</title></head><body><center><h3>404 Not Found</h3></center></body></html>');
}
}
/**
* 当接收到完整的http请求后的处理逻辑
* 1、如果请求的是以php为后缀的文件，则尝试加载
* 2、如果请求的url没有后缀，则尝试加载对应目录的index.php
* 3、如果请求的是非php为后缀的文件，尝试读取原始数据并发送
* 4、如果请求的文件不存在，则返回404
* @param TcpConnection $connection
* @param mixed $data
* @return void
*/
public function onMessage($connection, $data)
{
// 请求的文件
$url_info = parse_url($_SERVER['REQUEST_URI']);
if (!$url_info) {
Http::header('HTTP/1.1 400 Bad Request');
return $connection->close('<h1>400 Bad Request</h1>');
}
$path = $url_info['path'];
$path_info = pathinfo($path);
$extension = isset($path_info['extension']) ? $path_info['extension'] : '';
if ($extension === '') {
$path = ($len = strlen($path)) && $path[$len - 1] === '/' ? $path . 'index.php' : $path . '/index.php';
$extension = 'php';
}
$root_dir = isset($this->serverRoot[$_SERVER['HTTP_HOST']]) ? $this->serverRoot[$_SERVER['HTTP_HOST']] : current($this->serverRoot);
$file = "{$root_dir}/{$path}";
// 对应的php文件不存在则直接使用根目录的index.php
if ($extension === 'php' && !is_file($file)) {
$file = "{$root_dir}/index.php";
if (!is_file($file)) {
$file = "{$root_dir}/index.html";
$extension = 'html';
}
}
// 请求的文件存在
if (is_file($file)) {
// 判断是否是站点目录里的文件
if (!($request_realpath = realpath($file)) || !($root_dir_realpath = realpath($root_dir)) || 0 !== strpos($request_realpath, $root_dir_realpath)) {
Http::header('HTTP/1.1 400 Bad Request');
return $connection->close('<h1>400 Bad Request</h1>');
}
$file = realpath($file);
// 如果请求的是php文件
if ($extension === 'php') {
$cwd = getcwd();
chdir($root_dir);
ini_set('display_errors', 'off');
// 缓冲输出
ob_start();
// 载入php文件
try {
// $_SERVER变量
$_SERVER['REMOTE_ADDR'] = $connection->getRemoteIp();
$_SERVER['REMOTE_PORT'] = $connection->getRemotePort();
include $file;
} catch (\Exception $e) {
// 如果不是exit
if ($e->getMessage() != 'jump_exit') {
echo $e;
}
}
$content = ob_get_clean();
ini_set('display_errors', 'on');
$connection->close($content);
chdir($cwd);
return;
}
// 请求的是静态资源文件
if (isset(self::$mimeTypeMap[$extension])) {
Http::header('Content-Type: ' . self::$mimeTypeMap[$extension]);
} else {
Http::header('Content-Type: ' . self::$defaultMimeType);
}
// 获取文件信息
$info = stat($file);
$modified_time = $info ? date('D, d M Y H:i:s', $info['mtime']) . ' GMT' : '';
// 如果有$_SERVER['HTTP_IF_MODIFIED_SINCE']
if (!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $info) {
// 文件没有更改则直接304
if ($modified_time === $_SERVER['HTTP_IF_MODIFIED_SINCE']) {
// 304
Http::header('HTTP/1.1 304 Not Modified');
// 发送给客户端
return $connection->close('');
}
}
if ($modified_time) {
Http::header("Last-Modified: {$modified_time}");
}
// 发送给客户端
return $connection->close(file_get_contents($file));
} else {
// 404
Http::header("HTTP/1.1 404 Not Found");
return $connection->close('<html><head><title>404 页面不存在</title></head><body><center><h3>404 Not Found</h3></center></body></html>');
}
}
/**
* Websocket handshake.
* @param string $buffer
* @param TcpConnection $connection
* @return int
*/
protected static function dealHandshake($buffer, $connection)
{
// HTTP protocol.
if (0 === strpos($buffer, 'GET')) {
// Find \r\n\r\n.
$heder_end_pos = strpos($buffer, "\r\n\r\n");
if (!$heder_end_pos) {
return 0;
}
// Get Sec-WebSocket-Key.
$Sec_WebSocket_Key = '';
if (preg_match("/Sec-WebSocket-Key: *(.*?)\r\n/i", $buffer, $match)) {
$Sec_WebSocket_Key = $match[1];
} else {
$connection->send("HTTP/1.1 400 Bad Request\r\n\r\n<b>400 Bad Request</b><br>Sec-WebSocket-Key not found.<br>This is a WebSocket service and can not be accessed via HTTP.", true);
$connection->close();
return 0;
}
// Calculation websocket key.
$new_key = base64_encode(sha1($Sec_WebSocket_Key . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));
// Handshake response data.
$handshake_message = "HTTP/1.1 101 Switching Protocols\r\n";
$handshake_message .= "Upgrade: websocket\r\n";
$handshake_message .= "Sec-WebSocket-Version: 13\r\n";
$handshake_message .= "Connection: Upgrade\r\n";
$handshake_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";
// Mark handshake complete..
$connection->websocketHandshake = true;
// Websocket data buffer.
$connection->websocketDataBuffer = '';
// Current websocket frame length.
$connection->websocketCurrentFrameLength = 0;
// Current websocket frame data.
$connection->websocketCurrentFrameBuffer = '';
// Consume handshake data.
$connection->consumeRecvBuffer(strlen($buffer));
// Send handshake response.
$connection->send($handshake_message, true);
// There are data waiting to be sent.
if (!empty($connection->tmpWebsocketData)) {
$connection->send($connection->tmpWebsocketData, true);
$connection->tmpWebsocketData = '';
}
// blob or arraybuffer
if (empty($connection->websocketType)) {
$connection->websocketType = self::BINARY_TYPE_BLOB;
}
// Try to emit onWebSocketConnect callback.
if (isset($connection->onWebSocketConnect)) {
self::parseHttpHeader($buffer);
try {
call_user_func($connection->onWebSocketConnect, $connection, $buffer);
} catch (\Exception $e) {
echo $e;
exit(250);
}
$_GET = $_COOKIE = $_SERVER = array();
}
return 0;
} elseif (0 === strpos($buffer, '<polic')) {
$policy_xml = '<?xml version="1.0"?><cross-domain-policy><site-control permitted-cross-domain-policies="all"/><allow-access-from domain="*" to-ports="*"/></cross-domain-policy>' . "";
$connection->send($policy_xml, true);
$connection->consumeRecvBuffer(strlen($buffer));
return 0;
}
// Bad websocket handshake request.
$connection->send("HTTP/1.1 400 Bad Request\r\n\r\n<b>400 Bad Request</b><br>Invalid handshake data for websocket. ", true);
$connection->close();
return 0;
}
