what i’m trying is connect the client [webSocket] with PHP server socket my server socket will accept the socket from client, and fetch the Request headers,
after receiving the Request, i sent back handshake [response] But the status for webSocket [client] is pending and never get the response
JS code:
const URL = "ws://localhost:8050";
var socket = new WebSocket(URL);
socket.onopen = function() {
console.log("Socket is openned!");
}
socket.onmessage = function() {
console.log("new message!");
}
and my PHP server Socket:
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (socket_bind($this->socket, self::ADDRESS, self::PORT) === false) {
throw new Exception("Could not bind socket at address ${self::ADDRESS}, port ${self::PORT}");
}
if (socket_listen($this->socket) === false) {
throw new Exception("Could not listen!!");
}
$running = true;
$clients = [];
while ($running) {
if (count($clients) < 2) {
$accept = socket_accept($this->socket);
// handshake
$this->handshake($accept);
$clients[] = $accept;
sleep(2);
continue;
}
}
handshake function:
private function handshake($client) {
if ($client instanceof Socket || is_resource($client)) {
echo "== Client is Vaild ==n";
}
// client sent the Request
$read = socket_read($client, 2048);
if ($read === false) {
throw new Exception("Could not Read!!");
}
// headers
if (preg_match("/Sec-WebSocket-Key: (.*)/", $read, $matches)){
$key = base64_encode(hash("sha1",$matches[1]."258EAFA5-E914-47DA-95CA-C5AB0DC85B11"));
$response_header = "HTTP/1.1 101 Switching Protocolsrn".
"Upgrade: websocketrn".
"Connection: Upgradern".
"Sec-WebSocket-Accept: $keyrn";
// send the response
$bytes_sent = socket_write($client, $response_header, strlen($response_header));
if ($bytes_sent === false) {
echo "n====== Cannot send the handshake ==========n";
} elseif ($bytes_sent > 0) {
// ------- sent around 155 bytes ----------- //
echo "n====== handshake has been sent [". $bytes_sent ."bytes] ==========n";
}
}
}
After sending the response, the client still in pending status, and the connection not openned.
Thank you.
The Request From Client:
GET / HTTP/1.1
Host: localhost:8050
Connection: Upgrade
Pragma: no-cache
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
Upgrade: websocket
Origin: http://localhost
Sec-WebSocket-Version: 13
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,ar;q=0.8
Cookie: _ga=GA1.1.213058296.1602471332; __atuvc=1%7C52%2C1%7C3
Sec-WebSocket-Key: UmjWLRlhTXqM1rF6kSaVhQ==
Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits
what i’m trying is sending back the response:
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: NmQwYjVlY2VhMTQzMzUyYjFiNWMwZmU4Y2E3NmFjZTc4ZDc4N2I2Yw==
UPDATE:
I fixed the Sec-WebSocket-Accept key by using sha1(…, binary = true) before base64.
End my Response i added
rn
to end the header response.
Now i’m getting error: webSocket connection http://host:port failed.
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Answer
It’s done, the problem was Sec-WebSocket-Accept
key, it needed to be trim(key)