Practical guide to golang framework development: common mistakes and solutions

Common Go framework errors and their solutions: Error variable is not checked: Check the error variable and perform processing based on the error, such as if err != nil { ... }. Context is not used correctly: pass Context to a function that supports this feature, such as ctx, cancel := context.WithTimeout(..., ...); defer cancel(). HTTP request handling errors: Use http.Error and http.Errorf to correctly generate HTTP responses, such as func handleRequest(...) { if err != nil { http.Error(...) } }. Concurrency safety issues: Use concurrency-safe data structures or mutex locks to protect shared resources, such as var mu sync.Mutex; ....

Practical Guide to Go Framework Development: Common Errors and Solutions

In Go framework development, we often encounter various errors, and resolving these errors is critical to efficient development. This article will introduce some common Go framework errors and their corresponding solutions.

Error 1: Error variable is not checked

Problem:The error variable is not checked, causing potential errors to be ignored, resulting in potential problems with the program.

Solution: Always check the error variable and perform corresponding processing based on the error. For example:

if err != nil {
    // 处理错误
}

Error 2: Context is not used correctly

Problem: Context is not used correctly, causing the goroutine to fail to exit or cancel correctly.

Workaround: Always pass Context to all functions and methods that support this feature. For example:

ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()

if err := service.DoSomething(ctx); err != nil {
    // 处理错误
}

Error 3: HTTP request processing error

Problem: Errors are not handled correctly in HTTP request processing, causing the client to receive an inconsistent or incorrect response .

Solution: Use functions such as http.Error and http.Errorf to correctly generate HTTP responses and handle errors. For example:

func handleRequest(w http.ResponseWriter, r *http.Request) {
    // ...代码

    if err != nil {
        http.Error(w, "Internal Server Error", http.StatusInternalServerError)
        return
    }

    // ...代码
}

Error 4: Concurrency security issues

Problem:In a concurrent environment, shared data and resources are not handled correctly, resulting in data races or deadlocks.

Solution: Use concurrency-safe data structures (such as sync.Map) or use mutex locks to protect shared resources. For example:

var mu sync.Mutex
var data map[string]string

func ReadData(key string) (string, error) {
    mu.Lock()
    defer mu.Unlock()

    return data[key], nil
}

Error 5: Logging configuration error

Problem: Logging is not configured correctly, resulting in the inability to log errors or debugging information.

Solution: Use the log package or a third-party log library to correctly configure the log level and output destination. For example:

import (
    "log"
    "os"
)

 func main() {
    log.SetOutput(os.Stdout)
    log.SetFlags(log.LstdFlags | log.Lshortfile)

    // ...代码
}

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