How does Go WebSocket handle errors?

WebSocket error handling in Go is divided into the following two categories: Parse/Validation Errors: Parsing or validation errors, such as this wrong handshake request. Connection Errors: Errors in establishing or maintaining connections, such as network connection disconnection or timeout. Ways to handle errors include checking the error variable directly, using a defer statement, and using an error wrapper. By handling errors correctly, you can establish robust and reliable WebSocket connections in your Go applications.

#How does Go WebSocket handle errors?

WebSocket is a popular web socket protocol that allows full-duplex communication between clients and servers. When using WebSockets in Go, handling errors is crucial to ensure the robustness of your application.

Error types

WebSocket errors in Go are mainly divided into the following two categories:

• Parse/Validation Errors:During parsing or verification An error occurred during a WebSocket request or response, such as an invalid handshake request.
• Connection Errors: Errors that occur when establishing or maintaining a WebSocket connection, such as a network connection disconnection or timeout.

Error handling

When using the WebSocket library, errors are usually returned through variables of type error. In order to handle errors correctly, there are several ways:

1. Check the error variable directly

ws, err := websocket.Dial(url, nil)
if err != nil {
    // Handle error
}

2. Use the defer statement

# The

##defer statement can be used to perform cleanup operations before the function returns, including handling errors:

defer ws.Close()

if err := ws.WriteMessage(websocket.TextMessage, message); err != nil {
    // Handle error
}

3. Using an error wrapper

Error wrapping provides details about the error context for the information and allows developers to create custom errors.

type MyError struct {
    wrapped error
}

// ...

Practical Case

The following is a practical case showing how to handle WebSocket connection errors:

package main

import (
    "fmt"
    "log"

    "github.com/gorilla/websocket"
)

func main() {
    // 尝试连接到 WebSocket 服务
    ws, _, err := websocket.DefaultDialer.Dial("ws://localhost:8080", nil)
    if err != nil {
        // 处理错误，例如与服务器建立连接失败
        log.Fatal(err)
    }

    defer ws.Close()

    // 尝试写消息到 WebSocket
    if err := ws.WriteMessage(websocket.TextMessage, []byte("Hello")); err != nil {
        // 处理错误，例如消息写入失败
        log.Fatal(err)
    }

    // ...
}

By handling errors correctly, you can build a robust and reliable Go application WebSocket connection.

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