我目前正在为我的学士论文工作，最近开始“深入”研究 node.js 和 webSocket 的使用。在 Firefox 15.0 和 Chrome 21.0.1180.89 m 中访问时，我的 webSocket 服务器运行没有问题。在 Opera 12.02 中，客户端-服务器握手似乎存在问题。这是 Opera 的错误控制台所说的：
[31.08.2012 01:03:51] WebSockets - http://10.0.0.2/
Connection
WebSocket handshake failure, invalid response code '400'.
有趣的是：我在 Dragonfly 控制台的网络日志中的任何地方都找不到这个错误。访问网站时请求的所有字段（index.html、client.js 等）都已找到并按原样提供（HTTP 状态代码 200 OK）。此外，我的服务器返回的唯一状态代码是 200、404 和 500，所以这看起来像是来自 webSocket 本身。
是的，在 Opera 中启用了 webSocket ...我不知道问题可能是什么
任何帮助将非常感激 ：）
编辑：到目前为止，这是我的代码，因此您可以看到我的服务器发送了哪些标头以及如何使用 client.js 创建 webSocket 连接：
server.js：
// load required modules:
var http = require("http");
var WebSocketServer = require("websocket").server;
path = require("path");
url = require("url");
filesys = require("fs");
// declare listening port vars:
var httpListeningPort = 80;
var webSocketListeningPort = 80;
// create HTTP-server:
var httpSrv = http.createServer(function(request, response) {
console.log((new Date()) + ":\tReceived request for " + request.url);
// response.writeHead(200);
// response.end();
var myPath = url.parse(request.url).pathname;
var fullPath = path.join(process.cwd(), myPath);
if(myPath === "/") {
fullPath += "index.html";
console.log("Full path:\t" + fullPath);
filesys.readFile(fullPath, "binary", function(err, file) {
if(err) {
response.writeHeader(500, {"Content-Type": "text/plain"});
response.write(err + "\n");
response.end();
}
else {
response.writeHeader(200);
response.write(file, "binary");
response.end();
}
});
}
else {
path.exists(fullPath, function(exists) {
if(!exists) {
response.writeHeader(404, {"Content-Type": "text/plain"});
response.write("404 Not Found\n");
response.end();
}
else {
filesys.readFile(fullPath, "binary", function(err, file) {
if(err) {
response.writeHeader(500, {"Content-Type": "text/plain"});
response.write(err + "\n");
response.end();
}
else {
response.writeHeader(200);
response.write(file, "binary");
response.end();
}
});
}
});
}
});
httpSrv.listen(httpListeningPort, function() {
console.log((new Date()) + ":\tServer is now listening on port " + httpListeningPort);
});
// create webSocket server and tie it to the http server:
wsServer = new WebSocketServer({
httpServer: httpSrv
});
function originChecker(origin) {
if(origin) {
console.log("Origin " + origin + " is allowed");
return true;
} else {
console.log("origin is NOT allowed.");
return false;
}
}
// how to handle requests:
wsServer.on("request", function(request) {
// check whether origin is allowed or not:
if(originChecker(request.origin) === false) {
request.reject();
console.log((new Date()) + ":\tConnection request from origin " + request.origin + " rejected.");
return;
}
// accept the connecteion request -> open the connection:
var connection = request.accept(null, request.origin);
console.log((new Date()) + ":\tConnection request from " + request.origin + " accepted.");
// handle incoming messages from the clients:
connection.on("message", function(message) {
if(message.type === "utf8") {
console.log((new Date()) + ":\tReceived message from " + request.origin + ":\nType: " + message.type + "\nLength: " + message.utf8Data.length + "\nMessage: " + message.utf8Data);
// echo "Message received":
connection.sendUTF(JSON.stringify( { type: "message", data: "Message received !" } ));
} else {
// send error message back to client:
console.log((new Date()) + ":\tReceived message from " + request.origin + ":\nERROR:\tMessage is NOT UTF-8! it's " + message.type);
connection.sendUTF(JSON.stringify( { type: "message", data: "ONLY UTF-8 accepted !" } ));
}
});
// what to do when connection is closed:
connection.on("close", function() {
console.log((new Date()) + ":\tClient @" + connection.remoteAddress + " disconnected.");
});
});
客户端.js：
function client() {
if("WebSocket" in window) {
alert("WebSocket is supported by your browser!");
// try to connect to the webSocket server:
var connection = null;
connection = new WebSocket("ws://10.0.0.2:80");
// things to do once the connection is opened:
connection.onopen = function() {
alert("INFO:\tConnection to server is OPEN");
document.getElementById("msgInput").focus();
document.getElementById("msgInput").disabled = false;
document.getElementById("msgInput").value = "";
document.getElementById("msgInput").onkeyup = function(key) {
switch(key.keyCode) {
case 13: if(document.getElementById("msgInput").value === "") {
break;
}
var messageText = document.getElementById("msgInput").value;
document.getElementById("msgInput").disabled = true;
document.getElementById("msgInput").value = "";
document.getElementById("statusHeader").innerHTML = "Sending...";
connection.send(messageText);
break;
default: document.getElementById("statusHeader").innerHTML = "Press ENTER to send!";
}
};
};
connection.onerror = function(error) {
document.body.style.backgroundColor = "#220000";
document.body.style.color = "#aa0000";
document.getElementById("statusHeader").innerHTML = "ERROR connecting to server -> OFFLINE";
return;
};
connection.onmessage = function(message) {
try {
var json = JSON.parse(message.data);
} catch (error) {
alert("ERROR parsing message:\t" + error);
return;
}
document.getElementById("statusHeader").innerHTML = json.data;
document.getElementById("msgInput").disabled = false;
};
connection.onclose = function() {
setTimeout(function() {
document.body.style.backgroundColor = "#808080";
document.body.style.color = "#ffffff";
document.getElementById("statusHeader").innerHTML = "OFFLINE";
document.getElementById("msgInput").disabled = true;
document.getElementById("msgInput").value = "OFFLINE";
}, 5000);
return;
};
} else {
alert("WebSocket is NOT supported by your browser! Exiting now.");
return;
}
};