我有以下代码，这是以前的工作，现在突然我得到一个错误;
我得到的错误是;
Failed to connect to server Server responed with: Server did not accept to upgrade connection to websocket.HTTP/1.1 200 OK Date: Sun, 22 Aug 2021 01:07:27 GMT Content-Type: text/html Transfer-Encoding: chunked Connection: keep-alive Last-Modified: Fri, 05 Mar 2021 07:33:32 GMT X-By: @XRPLF X-Upgrade: WebSocket X-Conn: upgrade CF-Cache-Status: DYNAMIC Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" Report-To: {"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v3?s=ahbUvdpOxo1wZb%2B54qo5pEWE0KGc%2BTpWu2vgw47WhbCgjbfPwdQOGLCAZlivJyijhHs4PTt4nYVIW3ak%2BwAtlz6qhz36saYBmLZ3%2FyKJc8ZB6OJA0%2FNVp14%3D"}],"group":"cf-nel","max_age":604800} NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800} Server: cloudflare CF-RAY: 682834517edc2ce3-LHR alt-svc: h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400, h3=":443"; ma=86400 6980
我不太确定是什么引起的，下面是代码;
<?php
include('/websocket_client.php');
$server = 'xrpl.ws';
$command = json_encode(array(
'id' => 2,
'command' => "server_info"
));
if( $sp = websocket_open($server, 443,'',$errstr, 10, true) ) {
websocket_write($sp,$command);
$result = websocket_read($sp,$errstr);
}else {
echo "Failed to connect to servern";
echo "Server responed with: $errstrn";
}
$result_data = json_decode($result, true);
echo '<pre>';
echo $result_data;
echo '</pre>';
?>
下面是Websocket_Client.php页，很抱歉篇幅太长;但我觉得把这些都写进去可能很重要。
<?php
/*----------------------------------------------------------------------------*
Websocket client - https://github.com/paragi/PHP-websocket-client
By Paragi 2013, Simon Riget MIT license.
This is a demonstration of a websocket clinet.
If you find flaws in it, please let me know at simon.riget (at) gmail
Websockets use hybi10 frame encoding:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-------+-+-------------+-------------------------------+
|F|R|R|R| opcode|M| Payload len | Extended payload length |
|I|S|S|S| (4) |A| (7) | (16/63) |
|N|V|V|V| |S| | (if payload len==126/127) |
| |1|2|3| |K| | |
+-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
| Extended payload length continued, if payload len == 127 |
+ - - - - - - - - - - - - - - - +-------------------------------+
| |Masking-key, if MASK set to 1 |
+-------------------------------+-------------------------------+
| Masking-key (continued) | Payload Data |
+-------------------------------- - - - - - - - - - - - - - - - +
: Payload Data continued ... :
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
| Payload Data continued ... |
+---------------------------------------------------------------+
See: https://tools.ietf.org/rfc/rfc6455.txt
or: http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10#section-4.2
*----------------------------------------------------------------------------*/
/*============================================================================*
Open websocket connection
resource websocket_open(string $host [,int $port [,$additional_headers [,string &error_string ,[, int $timeout]]]]
host
A host URL. It can be a domain name like www.example.com or an IP address,
with port number. Local host example: 127.0.0.1:8080
port
headers (optional)
additional HTTP headers to attach to the request.
For example to parse a session cookie: "Cookie: SID=" . session_id()
error_string (optional)
A referenced variable to store error messages, i any
timeout (optional)
The maximum time in seconds, a read operation will wait for an answer from
the server. Default value is 10 seconds.
ssl (optional)
persistant (optional)
path (optional)
Context (optional)
Open a websocket connection by initiating a HTTP GET, with an upgrade request
to websocket.
If the server accepts, it sends a 101 response header, containing
"Sec-WebSocket-Accept"
*============================================================================*/
function websocket_open($host='',$port=80,$headers='',&$error_string='',$timeout=10,$ssl=false, $persistant = false, $path = '/', $context = null){
// Generate a key (to convince server that the update is not random)
// The key is for the server to prove it i websocket aware. (We know it is)
$key=base64_encode(openssl_random_pseudo_bytes(16));
$header = "GET " . $path . " HTTP/1.1rn"
."Host: $hostrn"
."pragma: no-cachern"
."Upgrade: WebSocketrn"
."Connection: Upgradern"
."Sec-WebSocket-Key: $keyrn"
."Sec-WebSocket-Version: 13rn";
// Add extra headers
if(!empty($headers)) foreach($headers as $h) $header.=$h."rn";
// Add end of header marker
$header.="rn";
// Connect to server
$host = $host ? $host : "127.0.0.1";
$port = $port <1 ? ( $ssl ? 443 : 80 ): $port;
$address = ($ssl ? 'ssl://' : '') . $host . ':' . $port;
$flags = STREAM_CLIENT_CONNECT | ( $persistant ? STREAM_CLIENT_PERSISTENT : 0 );
$ctx = $context ?? stream_context_create();
$sp = stream_socket_client($address, $errno, $errstr, $timeout, $flags, $ctx);
if(!$sp){
$error_string = "Unable to connect to websocket server: $errstr ($errno)";
return false;
}
// Set timeouts
stream_set_timeout($sp,$timeout);
if (!$persistant or ftell($sp) === 0) {
//Request upgrade to websocket
$rc = fwrite($sp,$header);
if(!$rc){
$error_string
= "Unable to send upgrade header to websocket server: $errstr ($errno)";
return false;
}
// Read response into an assotiative array of headers. Fails if upgrade failes.
$reaponse_header=fread($sp, 1024);
// status code 101 indicates that the WebSocket handshake has completed.
if (stripos($reaponse_header, ' 101 ') === false
|| stripos($reaponse_header, 'Sec-WebSocket-Accept: ') === false) {
$error_string = "Server did not accept to upgrade connection to websocket."
.$reaponse_header. E_USER_ERROR;
return false;
}
// The key we send is returned, concatenate with "258EAFA5-E914-47DA-95CA-
// C5AB0DC85B11" and then base64-encoded. one can verify if one feels the need...
}
return $sp;
}
/*============================================================================*
Write to websocket
int websocket_write(resource $handle, string $data ,[boolean $final])
Write a chunk of data through the websocket, using hybi10 frame encoding
handle
the resource handle returned by websocket_open, if successful
data
Data to transport to server
final (optional)
indicate if this block is the final data block of this request. Default true
binary (optional)
indicate if this block is sent in binary or text mode. Default true/binary
*============================================================================*/
function websocket_write($sp,$data,$final=true,$binary=true){
// Assemble header: FINal 0x80 | Mode (0x02 binary, 0x01 text)
if ($binary)
$header=chr(($final?0x80:0) | 0x02); // 0x02 binary mode
else
$header=chr(($final?0x80:0) | 0x01); // 0x01 text mode
// 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));
else $header.=chr(0x80 | 127) . pack("N",0) . pack("N",strlen($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);
}
/*============================================================================*
Read from websocket
string websocket_read(resource $handle [,string &error_string])
read a chunk of data from the server, using hybi10 frame encoding
handle
the resource handle returned by websocket_open, if successful
error_string (optional)
A referenced variable to store error messages, i any
Read
Note:
- This implementation waits for the final chunk of data, before returning.
- Reading data while handling/ignoring other kind of packages
*============================================================================*/
function websocket_read($sp,&$error_string=NULL){
$data="";
do{
// Read header
$header=fread($sp,2);
if(!$header){
$error_string = "Reading header from websocket failed.";
return false;
}
$opcode = ord($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;
$header=fread($sp,$ext_len);
if(!$header){
$error_string = "Reading header extension from websocket failed.";
return false;
}
// 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){
$error_string = "Reading header mask from websocket failed.";
return false;
}
}
// Get payload
$frame_data='';
while($payload_len>0){
$frame= fread($sp,$payload_len);
if(!$frame){
$error_string = "Reading from websocket failed.";
return false;
}
$payload_len -= strlen($frame);
$frame_data.=$frame;
}
// Handle ping requests (sort of) send pong and continue to read
if($opcode == 9){
// Assamble header: FINal 0x80 | Opcode 0x0A + Mask on 0x80 with zero payload
fwrite($sp,chr(0x8A) . chr(0x80) . pack("N", rand(1,0x7FFFFFFF)));
continue;
// Close
} elseif($opcode == 8){
fclose($sp);
// 0 = continuation frame, 1 = text frame, 2 = binary frame
}elseif($opcode < 3){
// Unmask data
$data_len=strlen($frame_data);
if($masked)
for ($i = 0; $i < $data_len; $i++)
$data.= $frame_data[$i] ^ $mask[$i % 4];
else
$data.= $frame_data;
}else
continue;
}while(!$final);
return $data;
}
?>
我最初以为我已经被列入黑名单了，因为我发出的请求数量太多，而且我在消息中看到了一些关于CloudFlare的信息，但我使用VPN导航到xrpl。ws通过主机的IP，我能够访问这个没有问题。我没有对PHP ini文件进行任何更改，所以我真的坚持是什么导致了这一点。谢谢你的帮助，很抱歉例子太长了。再次感谢。
我确实看到了前面提到的密钥生成方式的答案，但我仔细研究了一下，我相信它使用了一种很好的生成方法。所以我真的很茫然。
错误信息非常清楚:
Server did not accept to upgrade connection to websocket.
你需要棘轮，因为在这个服务器上可能没有可用的web-socket支持。
或者它可能发送意外的HTTP报头。