我正在尝试将基于PHP的客户端连接到websocket服务器.
这是我一直在使用的代码,已经在不同的论坛上广泛发布.但由于某种原因,我无法让它发挥作用.
任何帮助,将不胜感激.
$host = 'host'; //where is the websocket server
$port = 443; //ssl
$local = "http://www.example.com/"; //url where this script run
$data = '{"id": 2,"command": "server_info"}'; //data to be send
$head = "GET / HTTP/1.1"."\r\n".
"Upgrade: WebSocket"."\r\n".
"Connection: Upgrade"."\r\n".
"Origin: $local"."\r\n".
"Host: $host"."\r\n".
"Content-Length: ".strlen($data)."\r\n"."\r\n";
////WebSocket handshake
$sock = fsockopen($host, $port, $errno, $errstr, 2);
fwrite($sock, $head ) or die('error:'.$errno.':'.$errstr);
$headers = fread($sock, 2000);
fwrite($sock, "\x00$data\xff" ) or die('error:'.$errno.':'.$errstr);
$wsdata = fread($sock, 2000); //receives the data included in the websocket package "\x00DATA\xff"
$retdata = trim($wsdata,"\x00\xff"); //extracts data
////WebSocket handshake
fclose($sock);
echo $retdata;
我可能更喜欢使用现有的websocket客户端库(可能是https://github.com/gabrielbull/php-websocket-client或https://github.com/Devristo/phpws/tree/master/src/Devristo/Phpws /客户？)而不是自己滚动,但我得到它至少连接使用:
$head = "GET / HTTP/1.1"."\r\n".
"Host: $host"."\r\n".
"Upgrade: websocket"."\r\n".
"Connection: Upgrade"."\r\n".
"Sec-WebSocket-Key: asdasdaas76da7sd6asd6as7d"."\r\n".
"Sec-WebSocket-Version: 13"."\r\n".
"Content-Length: ".strlen($data)."\r\n"."\r\n";
我的服务器正在使用TLS/SSL,所以我还需要:
$sock = fsockopen('tls://'.$host, $port, $errno, $errstr, 2);
完整的协议规范是:https://tools.ietf.org/rfc/rfc6455.txt
您的标头必须包含:
Sec-WebSocket-Key: (some value)
Sec-WebSocket-Version: 13
连接成功.
建立连接后,还需要使用hybi10帧编码.
请参阅:https://tools.ietf.org/rfc/rfc6455.txt - 虽然有点干.
我做了这个工作的例子:
<?php
$sp=websocket_open('127.0.0.1/ws_request.php?param=php_test',$errstr);
websocket_write($sp,"Websocket request message");
echo websocket_read($sp,true);
$sp=websocket_open('127.0.0.1:8080/ws_request.php?param=php_test',$errstr);
websocket_write($sp,"Websocket request message");
echo websocket_read($sp,true);
function websocket_open($url){
$key=base64_encode(openssl_random_pseudo_bytes(16));
$query=parse_url($url);
$header="GET / HTTP/1.1\r\n"
."pragma: no-cache\r\n"
."cache-control: no-cache\r\n"
."Upgrade: WebSocket\r\n"
."Connection: Upgrade\r\n"
."Sec-WebSocket-Key: $key\r\n"
."Sec-WebSocket-Version: 13\r\n"
."\r\n";
$sp=fsockopen($query['host'],$query['port'], $errno, $errstr,1);
if(!$sp) die("Unable to connect to server ".$url);
// Ask for connection upgrade to websocket
fwrite($sp,$header);
stream_set_timeout($sp,5);
$reaponse_header=fread($sp, 1024);
if(!strpos($reaponse_header," 101 ")
|| !strpos($reaponse_header,'Sec-WebSocket-Accept: ')){
die("Server did not accept to upgrade connection to websocket"
.$reaponse_header);
}
return $sp;
}
function websocket_write($sp, $data,$final=true){
// Assamble header: FINal 0x80 | Opcode 0x02
$header=chr(($final?0x80:0) | 0x02); // 0x02 binary
// Mask 0x80 | payload length (0-125)
if(strlen($data)<126) $header.=chr(0x80 | strlen($data));
elseif (strlen($data)<0xFFFF) $header.=chr(0x80 | 126) . pack("n",strlen($data));
elseif(PHP_INT_SIZE>4) // 64 bit
$header.=chr(0x80 | 127) . pack("Q",strlen($data));
else // 32 bit (pack Q dosen't work)
$header.=chr(0x80 | 127) . pack("N",0) . pack("N",strlen($data));
// Add mask
$mask=pack("N",rand(1,0x7FFFFFFF));
$header.=$mask;
// Mask application data.
for($i = 0; $i < strlen($data); $i++)
$data[$i]=chr(ord($data[$i]) ^ ord($mask[$i % 4]));
return fwrite($sp,$header.$data);
}
function websocket_read($sp,$wait_for_end=true,&$err=''){
$out_buffer="";
do{
// Read header
$header=fread($sp,2);
if(!$header) die("Reading header from websocket failed");
$opcode = ord($header[0]) & 0x0F;
$final = ord($header[0]) & 0x80;
$masked = ord($header[1]) & 0x80;
$payload_len = ord($header[1]) & 0x7F;
// Get payload length extensions
$ext_len = 0;
if($payload_len >= 0x7E){
$ext_len = 2;
if($payload_len == 0x7F) $ext_len = 8;
$ext=fread($sp,$ext_len);
if(!$ext) die("Reading header extension from websocket failed");
// Set extented paylod length
$payload_len= 0;
for($i=0;$i<$ext_len;$i++)
$payload_len += ord($header[$i]) << ($ext_len-$i-1)*8;
}
// Get Mask key
if($masked){
$mask=fread($sp,4);
if(!$mask) die("Reading header mask from websocket failed");
}
// Get payload
$frame_data='';
do{
$frame= fread($sp,$payload_len);
if(!$frame) die("Reading from websocket failed.");
$payload_len -= strlen($frame);
$frame_data.=$frame;
}while($payload_len>0);
// if opcode ping, reuse headers to send a pong and continue to read
if($opcode==9){
// Assamble header: FINal 0x80 | Opcode 0x02
$header[0]=chr(($final?0x80:0) | 0x0A); // 0x0A Pong
fwrite($sp,$header.$ext.$mask.$frame_data);
// Recieve and unmask data
}elseif($opcode<3){
$data="";
if($masked)
for ($i = 0; $i < $data_len; $i++)
$data.= $frame_data[$i] ^ $mask[$i % 4];
else
$data.= $frame_data;
$out_buffer.=$data;
}
// wait for Final
}while($wait_for_end && !$final);
return $out_buffer;
}
你可以在这里获得完整版:https://github.com/paragi/PHP-websocket-client
使用纯 php连接到WSS 流：
公共币安 wss api 的示例。
<?php
$sock = stream_socket_client("tls://stream.binance.com:9443",$error,$errnum,30,STREAM_CLIENT_CONNECT,stream_context_create(null));
if (!$sock) {
echo "[$errnum] $error" . PHP_EOL;
} else {
echo "Connected - Do NOT get rekt!" . PHP_EOL;
fwrite($sock, "GET /stream?streams=btcusdt@kline_1m HTTP/1.1\r\nHost: stream.binance.com:9443\r\nAccept: */*\r\nConnection: Upgrade\r\nUpgrade: websocket\r\nSec-WebSocket-Version: 13\r\nSec-WebSocket-Key: ".rand(0,999)."\r\n\r\n");
while (!feof($sock)) {
var_dump(explode(",",fgets($sock, 512)));
}
}
更多细节：WebSockets - 通过 php 发送 json 数据