Golang example of Get and POST requests initiated using HTTP client

This is a creation in Article, where the information may have evolved or changed.

Golang to request a remote Web page, it can be implemented using the method provided by the client in the Net/http package. See the official website There are some examples, there are not too comprehensive examples, so I tidied up a bit.

GET request

Get requests can be directly HTTP. The Get method is very simple.

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func httpGet() {    resp, err := http.Get("http://www.01happy.com/demo/accept.php?id=1")    if err != nil {        // handle error    }    defer resp.Body.Close()    body, err := ioutil.ReadAll(resp.Body)    if err != nil {        // handle error    }    fmt.Println(string(body))}

POST request

One is to use HTTP. Post mode

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func httpPost() {    resp, err := http.Post("http://www.01happy.com/demo/accept.php",        "application/x-www-form-urlencoded",        strings.NewReader("name=cjb"))    if err != nil {        fmt.Println(err)    }    defer resp.Body.Close()    body, err := ioutil.ReadAll(resp.Body)    if err != nil {        // handle error    }    fmt.Println(string(body))}

Tips: Using this method, the second parameter is set to "application/x-www-form-urlencoded", otherwise the post parameter cannot be passed.

One is to use HTTP. Postform method

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func httpPostForm() {    resp, err := http.PostForm("http://www.01happy.com/demo/accept.php",        url.Values{"key": {"Value"}, "id": {"123"}})    if err != nil {        // handle error    }    defer resp.Body.Close()    body, err := ioutil.ReadAll(resp.Body)    if err != nil {        // handle error    }    fmt.Println(string(body))}

A complex request

Sometimes you need to set the header parameters, cookies and other data at the time of the request, you can use HTTP. Do method.

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func httpDo() {    client := &http.Client{}    req, err := http.NewRequest("POST", "http://www.01happy.com/demo/accept.php", strings.NewReader("name=cjb"))    if err != nil {        // handle error    }    req.Header.Set("Content-Type", "application/x-www-form-urlencoded")    req.Header.Set("Cookie", "name=anny")    resp, err := client.Do(req)    defer resp.Body.Close()    body, err := ioutil.ReadAll(resp.Body)    if err != nil {        // handle error    }    fmt.Println(string(body))}

With the above POST request, you must set Content-type as the Application/x-www-form-urlencoded,post parameter to pass normally.

If you want to initiate a head request can be directly using the HTTP client head method, relatively simple, here is no longer explained.

Full code sample file download: Golang_http_client initiating get and post code samples