Example of using http.Get in go (golang)

http_get.go

package main

import (
        "fmt"
        "io"
        "log"
        "net/http"
        "os"
)

func main() {
        if len(os.Args) != 2 {
                fmt.Fprintf(os.Stderr, "Usage: %s URL\n", os.Args[0])
                os.Exit(1)
        }
        response, err := http.Get(os.Args[1])
        if err != nil {
                log.Fatal(err)
        }
        defer response.Body.Close()
        _, err := io.Copy(os.Stdout, response.Body)
        if err != nil {
                log.Fatal(err)
        }
}

Thanks for sharing, it's so great.

This info was very helpful, however. Is there a way to pick out just the response status?

The response status (200, 404, etc.) is available in response.StatusCode. You don't need to read the body for the status code.

Hi All,
I am not able to see content of get response from a server . Could you please let me know how to get the response .Am seeing hexadecimal values from output

Pasted my code below:
+++++++++++++++
package main
import (
"fmt"
"net/http"
"io"
"os"
// "encoding/json"

)

func main() {
url := "http://localhost:8080/api/v1/networks"
res, err := http.Get(url)
if err != nil {
panic(err)
}
fmt.Println("response from GET request" ,res)
fmt.Println("output of pnmid", res.Body)
defer res.Body.Close()
, err := io.Copy(os.Stdout, response.Body)
// fmt.Println("whole body",)

body, err := ioutil.ReadAll(res.Body)
if err != nil {
	panic(err)
}
fmt.Println("response body" , res.Body)

Please help me on this to fix the issue.

I tried in below way and got output:

package main
import (
"fmt"
"net/http"
// "io"
// "os"
// "encoding/json"

)

func main() {
url := "http://localhost:3000/api/v1/subnets"
res, err := http.Get(url)
if err != nil {
panic(err)
}
fmt.Println("response from GET request" ,res)
fmt.Println("output of pnmid", res.Body)
defer res.Body.Close()
// , err := io.Copy(os.Stdout, response.Body)
// fmt.Println("whole body",)

/* body, err := ioutil.ReadAll(res.Body)
if err != nil {
panic(err)
}*/
fmt.Println("response body" , res.Body)
// fmt.Println(body)
// var p Payload

// err := json.Unmarshal(body , &p)

}

After execution:

go run Sample_restcall.go:

response from GET request &{200 OK 200 HTTP/1.1 1 1 map[Access-Control-Allow-Origin:[*] Content-Type:[application/json; charset=utf-8] Set-Cookie:[dcbfef97e14c2a3cdf00a5
afc32d1e96=d9871f0ca4d0f07b0c6b84a4d79d8153; path=/; HttpOnly] X-Powered-By:[Express] Access-Control-Allow-Headers:[Content-Type] Access-Control-Allow-Methods:[PUT, GET,
POST, DELETE, OPTIONS] Content-Length:[676] Etag:[W/"2a4-JHwpbMIyxGxUzMU+0J4onQ"] Date:[Fri, 21 Jul 2017 15:24:47 GMT] Cache-Control:[private]] 0xc04203e300 676 [] fals
e false map[] 0xc042030400 }
output of pnmid &{0xc04203e2c0 {0 0} false 0x5cb870 0x5cb800}
response body &{0xc04203e2c0 {0 0} false 0x5cb870 0x5cb800}

I could see response status code as 200 , how to see response content and how to decode to normal json format.

Naveennani777, you see what it is, slice of bytes, you have to convert it to string, try this:

        body, _ := ioutil.ReadAll(res.Body)
        text := string(body)
        fmt.Println(text)

Thanks alot sibyakin , Its working now.

thank you :)

Thank you :)

How to pass header in GET request

How to pass header in GET request

How to pass header in GET request

Here is an example:

client := &http.Client{}
apiURL := "https://myapi.url/data"
req, err := http.NewRequest("GET", apiURL, nil)
if err != nil {
	return nil, err
}

// add header to request
req.Header.Add("authkey", "...")

// perform get request
res, err := client.Do(req)

You dont need the else since your os.Exit'ing on condition of Line 12

@R4wm, done.