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当我执行以下代码时，出现错误:引用错误:未定义分水岭。我该如何定义它？我需要为其安装模块吗？
var restify=require('restify');
var ws= new Watershed();
var server=restify.createServer();
server.get('websocket/attach', function upgradeRoute(req, res, next){
if(!res.claimUpgrade){
next(new Error("Connection must be upgraded."));
return;
}
var upgrade=res.claimUpgrade();
var shed=ws.accept(req, upgrade.socket, upgrade.head);
shed.on('text', function (msg){
console.log("The message is: "+msg);
});
shed.send("hello there");
next(false);
});
server.listen(8081, function(){
console.log('%s listening at %s', server.name, server.url);
});
最佳答案
restify 文档中还有一部分提到了如何处理升级套接字的功能。我为此苦苦挣扎了很长一段时间，并认为我应该分享一个简单的解决方案。除了@Dibu Raj回复之外，您还需要创建restify服务器，并将handleUpgrades选项设置为true。以下是使 Restify 与 Websocket 升级和分水岭配合使用的完整示例:
'use strict';
var restify = require('restify');
var watershed = require('watershed');
var ws = new watershed.Watershed();
var server = restify.createServer({
handleUpgrades: true
});
server.get('/websocket/attach', function (req, res, next) {
if (!res.claimUpgrade) {
next(new Error('Connection Must Upgrade For WebSockets'));
return;
}
console.log("upgrade claimed");
var upgrade = res.claimUpgrade();
var shed = ws.accept(req, upgrade.socket, upgrade.head);
shed.on('text', function(msg) {
console.log('Received message from websocket client: ' + msg);
});
shed.send('hello there!');
next(false);
});
//For a complete sample, here is an ability to serve up a subfolder:
server.get(/\/test\/?.*/, restify.serveStatic({
directory: './static',
default: 'index.html'
}));
server.listen(8080, function() {
console.log('%s listening at %s', server.name, server.url);
});
要使用 html 页面来测试新的 Nodejs Websocket 服务器:将此 html 写入以下文件中:./static/test/index.html - 将浏览器指向 http://localhost:8080/test/index.html - 打开浏览器调试控制台以查看消息交换。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Web Socket test area</title>
<meta name="description" content="Web Socket tester">
<meta name="author" content="Tim">
</head>
<body>
Test Text.
<script>
(function() {
console.log("Opening connection");
var exampleSocket = new WebSocket("ws:/localhost:8080/websocket/attach");
exampleSocket.onopen = function (event) {
console.log("Opened socket!");
exampleSocket.send("Here's some text that the server is urgently awaiting!");
};
exampleSocket.onmessage = function (event) {
console.log("return:", event.data);
exampleSocket.close();
}
})();
</script>
</body>
</html>
您的浏览器日志将如下所示:
07:05:05.357 index.html:18 Opening connection
07:05:05.480 index.html:22 Opened socket!
07:05:05.481 index.html:26 return: hello there!
您的 Node 日志将如下所示:
restify listening at http://[::]:8080
client connected!
Rest service called started
upgrade claimed
Received message from websocket client: Here's some text that the server is urgently awaiting!
关于javascript - 如何在 Node.js 中定义分水岭？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40397325/
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