连接到HTML5 Websocket

问题描述

我对HTML5 Websockets有点困惑。我看了很多教程，其中有很多不同的连接使用不同的端口。这些端口是什么意思？

有这个地方不需要端口：

 新的WebSocket（ws：//www.websockets。组织）; 
  

最后第三个教程有一个端口，但它完全不同：

 新的WebSocket（ws：// localhost：8080 / echo）; 
  

我的问题是，为什么这些会有所不同？我如何知道连接到哪个端口？此外，我试图做我自己的连接：

  var ws = new WebSocket（ws：//test.ontarget -network.com/）; 
  

但是我得到以下错误：意外的响应代码：200 $ b

我已经测试过并试图连接到各种其他端口（不知道我在做什么，显然是在输入随机数字），而这错误会消失，但是，我的代码

  ws.onopen = function（）{
 alert（Connection Established ）; 
}; 
  

不会执行。

我试图完全理解HTML5的Websockets API，所以我可以尝试并创建更多动态应用程序。感谢您的帮助。

解决方案

以下内容来自：

lockquote

默认情况下，WebSocket协议使用端口80 for regular WebSocket
connections and port 443 for WebSocket connections over TLS
[RFC2818]。

真的但是，您应该能够使用任何未使用的有效端口。只要客户端尝试连接到服务器端脚本为套接字连接打开的端口，您应该没问题。

有关端口的简要说明：

- 端口80是HTTP端口。

- 端口8080是另一个HTTP端口。

- 端口443是HTTPS（即HTTP with TLS ）端口。

- Adob​​e代码中的端口1740看起来像一些其他服务尚未使用的随机端口。

有关完整的预设端口，请参阅以下内容：

至于你的Unexpected response code：200错误，我猜测你在客户端使用的WebSocket URL并不是指向有效的服务器端脚本，但如果没有更多信息，很难评论。

I'm a bit confused about HTML5 Websockets. I've looked at numerous tutorials out there and a lot of them have different variations of connecting using different ports. What do these ports mean?

Adobe for instance, uses this:

new WebSocket('ws://localhost:1740');

Then another tutorial has this where no ports are required:

new WebSocket("ws://www.websockets.org");

And finally a third tutorial has a port, but it's completely different:

new WebSocket("ws://localhost:8080/echo");

My question would be, why do these vary? How do I know which ports to connect to? Also, I've attempted to do my own connection:

var ws = new WebSocket("ws://test.ontarget-network.com/");

But I get the following error: Unexpected response code: 200

I've tested around and tried connecting to various other "ports" (not knowing what I'm doing obviously, typing in random numbers) and this error would disappear, however, my code

ws.onopen = function(){
   alert("Connection Established");
};

would not execute.

I'm trying to fully understand HTML5's Websockets API so I can experiment and create more dynamic applications. Thanks for the help.

解决方案

The following comes from the latest WebSocket draft:

Really though, you should be able to use any valid port not in use. As long as clients are trying to connect to the same port that the server-side script opens for the socket connection, you should be fine.

A quick note on ports:
- Port 80 is the HTTP port.
- Port 8080 is the alternate HTTP port.
- Port 443 is the HTTPS (i.e., HTTP with TLS) port.
- Port 1740 in the Adobe code seems like some random port not already in use by other services.

For a full list of preset ports, please see the following:
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

As for your "Unexpected response code: 200" error, I'm guessing that the WebSocket URL you're using on the client side is not pointing to a valid server-side script, but that's hard to comment on without more info.

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