我已购买一个 WebSocket 模块并在我的 WAMP 环境中安装了它。我还有一个 PHP 脚本，可以在正确位置生成 IPC 文件，并永久循环监听事件。但是，使用这个客户端代码：
var websocket = null;
var connect = function() {
var button = document.getElementById('connect-button');
// This function is a convenience function, to set the content
// of the response display
var setResponse = function(text) {
var element = document.getElementById('response');
element.innerHTML = text;
}
// A message telling the user we started connecting is always
// useful
button.innerHTML = 'Connecting ...';
// The file name `demo.ws' could in principle help in having multiple
// websockets at a single domain name.
//
// It's not implemented right now, but it can be if it's needed and
// it's not too hard.
//var url = "ws://websocket-example/websocket-example/websocket-example-websocket.rp";
var url = 'ws://' + window.location.hostname + '/WebSocket/websocket-example-websocket.rp';
// Create the websocket connection now
websocket = new WebSocket(url, 'standard');
// Install the handlers, the On Open handler is triggered
// immediately after the conection has been established
// and a successful handshake
websocket.onopen = function(event) {
// Update the connection status indicator
var element = document.getElementById('connection-status');
var input = document.getElementById('input');
element.innerHTML = 'Connected Now';
element.setAttribute('class', 'online');
// Update the button, and install a new handler to allow
// closing the websocket connection
button.innerHTML = 'Close';
button.onclick = function() {
websocket.close();
}
input.focus();
input.value = '';
}
// On close and on error handler, this is a simple demo
// hence the simplistic approach. Ideally this should be
// two separate functions
websocket.onclose =
websocket.onerror = function(event) {
// Update the connection status indicator
var element = document.getElementById('connection-status');
var input = document.getElementById('input');
element.innerHTML = 'Offline';
element.setAttribute('class', 'offline');
// Update button click handler, to reconnect if requested
button.innerHTML = 'Connect';
button.onclick = connect;
input.value = '';
// Clear the response text
setResponse('');
// Reset the websocket global variable
websocket = null;
}
// On message handler, triggered when a message is received
websocket.onmessage = function(event) {
// Set the response text
setResponse(event.data);
}
}
var send = function(message) {
// Send a message to the server but check that the websocket
// was connected first
if (websocket === null)
return;
// It's ok so, send the message now
websocket.send(message);
}
当连接被触发时，我的请求遇到了以下错误：
并且WebSocket连接到'ws://websocket-example/WebSocket/websocket-example-websocket.rp'失败：在WebSocket握手期间出错：意外的响应代码：200
websocket 保持为 null。我完全不理解这个错误，因为200似乎是一个OK状态，但是我的请求仍然失败。IPC文件是在服务器启动后生成的，位于正确的位置，并且执行脚本的用户具有请求文件的必要权限。这种行为的原因是什么，如何修复它？