Why doesn't my Go program use the Websocket library correctly?

In recent years, Websocket has become a technology favored by more and more web developers. It is a protocol that supports real-time, two-way communication, allowing the creation of persistent connections between web applications and servers. As an efficient server-side development language, Go language has better and better support for Websocket. However, sometimes we encounter some problems when implementing WebSocket in Go. This article will discuss one of the common problems: the reason why Go programs cannot use the Websocket library correctly.

First of all, we need to make it clear: Although Websocket is a very convenient protocol, it is different from the HTTP protocol. Websocket is different from HTTP requests that are disconnected after the server responds. Its connection needs to remain open on the server for a long time until the client or server closes the connection.

Since Websocket needs to go through a series of protocol operations and state management, Go programs using the Websocket library are slightly more complicated than programs using the HTTP library. When encountering problems, the most common situation is that the program cannot receive messages from the Websocket server. Next, we will analyze common causes and solutions.

1. First, make sure the routing is set correctly:

在使用Websocket时，需要在程序中正确设置路由。路由将HTTP请求根据其网址中的路由路径分发到不同的请求处理器。在Go语言中的Websocket程序中，需要使用一个特定的路由来处理Websocket相关的请求。请确保路由代码中正确指定handler。

2. Check the Websocket handshake protocol:

首先，请确认你的程序中实现了Websocket握手协议。在Go语言的Websocket程序中，这是十分重要的。该协议用于在客户端和服务器之间创建从HTTP连接到Websocket连接的手动切换。它还包含一些信息，例如协议版本和可用的Websocket子协议。因此，在实现Websocket连接时，务必仔细阅读Websocket标准库的文档，并确保按照标准实现握手协议。

3. Check the Websocket connection status:

在使用Websocket时，需要始终注意WebSocket连接的状态。在Go的标准Websocket库中，WebSocket连接存在三种状态：正在链接、已建立连接、已关闭。在这三种状态下，我们都不能停止处理消息。我们需要在程序中实现三种状态的处理方法，以确保状态转换正确。

4. Use buffering tools:

在Websocket程序中，有些情况下可能会出现消息过多的情况，导致我们无法及时接收和处理消息。为了解决这个问题， 我们可以使用缓冲技术。在Go的标准Websocket库中，可以通过设置消息缓冲区的大小来调整缓冲区的大小，以便更好地控制消息流的处理。

Summary:
When your Go program cannot use the Websocket library correctly, you should carefully check the above reasons. By observing program behavior and error messages, you can determine the cause of the problem and find appropriate solutions. Finally, we need to emphasize that in actual Websocket programs, you need to strengthen your understanding of the Websocket protocol in order to better use the Websocket library of the Go language to complete program development and optimization.

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