How to verify HTTP response status code in Golang?

The methods to verify the HTTP response status code in Golang are: use http.Response.StatusCode to directly compare the response status code with the expected value. Create a custom error type that contains a status code and error message, and verify the status code by catching the error.

How to verify HTTP response status code in Golang

Usingnet/httppackage in Golang When sending an HTTP request, it is important to verify the response status code. This helps handle server-side errors, configuration issues, and other network issues.

Usinghttp.Response.StatusCode

http.Responsetype contains aStatusCodefield , indicating the status code of the HTTP response. To verify the status code, you can simply compareStatusCodewith the expected value:

package main import ( "fmt" "net/http" "net/http/httptest" ) func main() { // 创建一个模拟响应 resp := httptest.NewRecorder() // 设置状态代码 resp.WriteHeader(http.StatusOK) if resp.Code == http.StatusOK { fmt.Println("成功") } }

Use a custom error type

An alternative validation response The method for status codes is to create a custom error type that contains the status code and error message:

package main import ( "errors" "fmt" "net/http" ) type HTTPError struct { Code int Msg string } func (e HTTPError) Error() string { return fmt.Sprintf("HTTP Error: %d - %s", e.Code, e.Msg) } func main() { // 发送请求并捕获响应 resp, err := http.Get("https://example.com") if err != nil { fmt.Println(err) return } if resp.StatusCode != http.StatusOK { // 创建自定义错误 err = HTTPError{Code: resp.StatusCode, Msg: "请求失败"} fmt.Println(err) } }

Practical case

The following is the use ofhttp.Response .StatusCodePractical example of verifying status code:

Suppose you are developing an API that uses HTTP GET to retrieve data from a database. You need to verify the response status code to ensure that the request completed successfully:

func GetUserData(userID int) (UserData, error) { resp, err := http.Get(fmt.Sprintf("https://myapi.com/users/%d", userID)) if err != nil { return UserData{}, err } if resp.StatusCode != http.StatusOK { return UserData{}, fmt.Errorf("请求失败: %d", resp.StatusCode) } // 解析响应并返回数据 }

By validating the response status code, you can ensure that data is only returned if the server successfully processed the request.

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