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[Golang] HTTP Request With Custom User-Agent

 3 years ago
source link: http://siongui.github.io/2018/02/27/go-http-request-with-custom-user-agent/
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[Golang] HTTP Request With Custom User-Agent

February 27, 2018

Example of HTTP request with custom User-Agent header via Go standard net/http package.

package main

import (
      "errors"
      "io/ioutil"
      "net/http"
      "strconv"
)

func HTTPRequestCustomUserAgent(url, userAgent string) (b []byte, err error) {
      req, err := http.NewRequest("GET", url, nil)
      if err != nil {
              return
      }

      req.Header.Set("User-Agent", userAgent)

      client := &http.Client{}
      resp, err := client.Do(req)
      if err != nil {
              return
      }
      defer resp.Body.Close()

      if resp.StatusCode != 200 {
              err = errors.New(
                      "resp.StatusCode: " +
                              strconv.Itoa(resp.StatusCode))
              return
      }

      return ioutil.ReadAll(resp.Body)
}

func main() {
      b, err := HTTPRequestCustomUserAgent("https://www.google.com/", "My User-Agent")
      if err != nil {
              panic(err)
      }
      println(string(b))
}

If you want to know how to send HTTP request with cookies, please see [2].

Tested on: Ubuntu Linux 17.10, Go 1.10.

References:

[1]GitHub - siongui/instago: Get photos, videos, stories, following and followers of Instagram


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