CODEWITHSUNDEEP
go
user3846091
user3846091

Reputation: 1703

Unable to send JSON as body for HTTP POST request in GO

When i make the POST request using the below GO Function. I get a invalid json on the server side.

If i send static json for example 

var jsonprep = []byte(`{"username":"[email protected]","password":"xyz123"}`)

it does work instead of 

var jsonprep string = "`{username:"+username+",password:"+password+"}`"

.

func makeHttpPostReq(url string, username string, password string){

    client := http.Client{}


    var jsonprep string = "`{username:"+username+",password:"+password+"}`"

    var jsonStr = []byte(jsonprep)

    req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
    req.Header.Set("Content-Type", "application/json")

    resp, err := client.Do(req)
    if err != nil {
         fmt.Println("Unable to reach the server.")
    } else {
         body, _ := ioutil.ReadAll(resp.Body)
         fmt.Println("body=", string(body))
    }

}

Upvotes: 2

Views: 12703

Answers (2)

jfly
jfly

Reputation: 7990

If you use 

var jsonprep string = "`{username:"+username+",password:"+password+"}`"

the server will get the data like this: 

`{username:your_username,password:yourpassword}`

because the string in back quotes `` which is in the double quotes is not raw string literals, of course it's invalid json. you can compose the json string manually:

var jsonprep string = "{\"username\":\"" + username + "\",\"password\":\"" + password + "\"}"

Upvotes: 2

Rob Napier
Rob Napier

Reputation: 299265

You've got your quoting wrong:

http://play.golang.org/p/PueWyQ1atq

var jsonprep string = "`{username:"+username+",password:"+password+"}`"

===> `{username:Bob,password:pass}`

You meant:

http://play.golang.org/p/LMuwxArf8G

var jsonprep string = `{"username":"`+username+`","password":"`+password+`"}`
===> {"username":"Bob","password":"pass"}

Upvotes: 7

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