golang error reading body

When developing Golang, we often need to send requests to other interfaces and then read the response body content. However, in the actual development process, we often encounter some errors in reading body content. Let us explore the causes and solutions of these problems.

1. Cause analysis:

1.1. Network request timeout

After the network request is sent, if a response is not received within the specified time, a timeout will occur. mistake. In this case, reading the response body content will fail.

Solution: For timeout errors, we can use the context package to set the timeout to avoid such errors.

1.2. HTTP request status code exception

When making an HTTP request, when receiving certain status codes, such as 401, 403, etc., the server will return an error message. At this time, read Fetching the response body content will fail.

Solution: In an HTTP request, we can determine whether the request is successful through the response status code. For non-200 status codes, we can obtain exception prompts by reading the error information.

Sample code:

resp, err := http.Get("https://example.com")

if err != nil {
    log.Fatal(err)
}

defer resp.Body.Close()

if resp.StatusCode != http.StatusOK {
    data, _ := ioutil.ReadAll(resp.Body)
    log.Println("Response Error: ", string(data))
    return
}

body, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatal(err)
}

1.3. Network connection exception

When making a network request, if the network connection is abnormal, reading the response body content will fail.

Solution: In order to ensure the stability of the network connection, we can increase the network connection timeout, and for abnormal situations such as network connection interruption, we need to perform exception handling.

Sample code:

client := &http.Client{
    Timeout: time.Second * 10,
}

resp, err := client.Do(req)

if err != nil {
    log.Fatal(err)
}

defer resp.Body.Close()

if resp.StatusCode != http.StatusOK {
    data, _ := ioutil.ReadAll(resp.Body)
    log.Println("Response Error: ", string(data))
    return
}

body, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatal(err)
}

2. Summary:

In Golang development, failure to read the response body content may occur in various situations, such as network Request timeout, HTTP request status code exception, network connection exception, etc. Through reasonable exception handling and error judgment, we can avoid the adverse effects of these problems on the program. At the same time, it is recommended that when sending network requests, try to use the standard library provided by Golang to ensure the reliability and efficiency of the code.

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