Ric*_*tte 5 c# c++ poco eventmachine websocket
问题:
websocket客户端(POCO 1.5.1,c ++)不会连接到websocket c#服务器(带有Fleck库的命令行应用程序).一个超时达到与抛出的异常:
Cannot upgrade to WebSocket connection: OK
Exception Code: 1
Poco WebException Documentation
WS_ERR_NO_HANDSHAKE = 1 :
No Connection: Upgrade or Upgrade: websocket header in handshake request.
事实1:这个websocket客户端将连接到Ruby Event Machine websocket服务器.
事实2:javascript客户端将连接到websocket c#服务器.
事实3:同样的javascript客户端也将连接到websocket ruby服务器.
事实4:websocket客户端不会连接到Alchemy Websocket服务器 neigther.https://github.com/Olivine-Labs/Alchemy-Websockets
使用Wireshark更新POCO正在使用 GET/HTTP/1.0\r \n
Javascript版本: GET/HTTP/1.1\r \n
#include "Game.h"
#include <irrlicht.h>
#include "driverChoice.h"
#include <iostream>
#include <assert.h>
#include "Poco/Net/WebSocket.h"
#include "Poco/Net/HTTPClientSession.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include "Poco/Net/ServerSocket.h"
#include "Poco/Net/NetException.h"
#include "Poco/Exception.h"
using Poco::Net::HTTPClientSession;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPResponse;
using Poco::Net::HTTPServerRequest;
using Poco::Net::HTTPServerResponse;
using Poco::Net::WebSocket;
using Poco::Net::WebSocketException;
using Poco::Exception;
// VS2010
// POCO 1.5.1
// Irrlicht 3D engine
// Windows 7 Enterprise edition
Game::Game(void)
{
}
Game::~Game(void)
{
}
//...
void Game::TestWebSocketClient()
{
char buffer[1024];
int flags;
int n;
std::string payload;
try
{
HTTPClientSession cs("localhost", 8080);
HTTPRequest request(HTTPRequest::HTTP_GET, "/ws");
HTTPResponse response;
std::string cmd;
WebSocket * ws = new WebSocket(cs, request, response); // Causes the timeout
payload = "SGClient: Hello World!";
ws->sendFrame(payload.data(), payload.size(), WebSocket::FRAME_TEXT);
n = ws->receiveFrame(buffer, sizeof(buffer), flags);
while( cmd != "exit")
{
cmd = "";
std::cin >> cmd;
ws->sendFrame(cmd.data(), cmd.size(), WebSocket::FRAME_TEXT);
n = ws->receiveFrame(buffer, sizeof(buffer), flags);
if( n > 0 )
{
std::cout << buffer << std::endl;
}
}
ws->shutdown();
}
catch (Exception ex)
{
return;
}
// vs2010
// fleck library
// Windows 7 enterprise edition
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using Fleck;
using System.Timers;
namespace TestWebsocket
{
class Program
{
static void Main()
{
FleckLog.Level = LogLevel.Debug;
var allSockets = new List<IWebSocketConnection>();
var server = new WebSocketServer("ws://localhost:8080");
server.Start(socket =>
{
socket.OnOpen = () =>
{
Console.WriteLine("Open!");
allSockets.Add(socket);
};
socket.OnClose = () =>
{
Console.WriteLine("Close!");
allSockets.Remove(socket);
};
socket.OnMessage = message =>
{
Console.WriteLine(message);
allSockets.ToList().ForEach(s => s.Send("Echo: " + message));
};
});
var input = Console.ReadLine();
while (input != "exit")
{
foreach (var socket in allSockets.ToList())
{
socket.Send(input);
}
input = Console.ReadLine();
}
}
}
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>websocket client</title>
<script type="text/javascript">
var start = function () {
var inc = document.getElementById('incomming');
var wsImpl = window.WebSocket || window.MozWebSocket;
var form = document.getElementById('sendForm');
var input = document.getElementById('sendText');
inc.innerHTML += "connecting to server ..<br/>";
// create a new websocket and connect
window.ws = new wsImpl('ws://localhost:8080/');
// when data is comming from the server, this metod is called
ws.onmessage = function (evt) {
inc.innerHTML += evt.data + '<br/>';
};
// when the connection is established, this method is called
ws.onopen = function () {
inc.innerHTML += '.. connection open<br/>';
};
// when the connection is closed, this method is called
ws.onclose = function () {
inc.innerHTML += '.. connection closed<br/>';
}
form.addEventListener('submit', function(e){
e.preventDefault();
var val = input.value;
ws.send(val);
input.value = "";
});
}
window.onload = start;
</script>
</head>
<body>
<form id="sendForm">
<input id="sendText" placeholder="Text to send" />
</form>
<pre id="incomming"></pre>
</body>
</html>
// Ruby 1.9
// gem install em-websocket required.
require 'em-websocket'
EventMachine::WebSocket.start(:host => "localhost", :port => 8080) do |ws|
ws.onopen { ws.send "RS: Hello Client!"}
ws.onmessage {
|msg| ws.send "RS: Pong: #{msg}"
puts msg
}
ws.onclose { puts "WebSocket closed" }
end
问题是 POCO 默认的 HTTP 请求版本是 1.0。
RFC 规范的第 4.1 节指出最小值为 1.1：
http://tools.ietf.org/html/rfc6455#section-4.1
- 请求的方法必须是 GET，并且 HTTP 版本必须至少为 1.1。例如，如果 WebSocket URI 是“ws://example.com/chat”，则发送的第一行应该是“GET /chat HTTP/1.1”。
通过将 HTTPRequest 结构替换为以下内容解决了问题：
HTTPRequest request(HTTPRequest::HTTP_GET, "/ws", "HTTP/1.1" );
干杯!
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