Wsrtjtyk

I would like to test my golang rest api using curl.

Command I used to do it:

curl -X POST -H "Content-Type: application/json" -d '{"username":"username","password":"password"}' "http://localhost:8000/api/rooms/signin"

simplified version of server I have written

package main



import (

    "fmt"

    "log"

    "net/http"

    "github.com/gorilla/mux"

)



func main() {

    fmt.Println("Listening on port 8000")



    router := mux.NewRouter()

    router.HandleFunc("/api/rooms/signin", Signin)



    log.Fatal(http.ListenAndServe(":8000", router))

}



func Signin(w http.ResponseWriter, r *http.Request) {

    if r.Method == "POST" {

        fmt.Println("POST")

        if err := r.ParseForm(); err != nil {

            fmt.Println("parsing failed")

            return

        }

        fmt.Println("parsing success")

        fmt.Println(r.Form)

        fmt.Println("path: ", r.URL.Path)

        fmt.Println("scheme: ", r.URL.Scheme)

        username := r.FormValue("username")

        password := r.FormValue("password")

        fmt.Println(username)

        fmt.Println(password)



        fmt.Println("username:", r.Form["username"])

        fmt.Println("password:", r.Form["password"])



        return

    }

}

The problem is I get an empty form - this is the output I get

Listening on port 8000

POST

parsing success

map

path:  /api/rooms/signin

scheme:  





username: 

password: 

I suppose this is not right, but I can't think of anything I may be doing wrong. The expected output is to have "password" and "username" strings as the output of golang server.

As pointed out in the comments, you are accepting a JSON payload and not a POST form. Here is a small snippet to aid you in handling JSON although there are a lot in the internet.

func Signin(w http.ResponseWriter, r *http.Request) {



    body, err := ioutil.ReadAll(r.Body)

    if err != nil {

        // error handling

    }



    params := make(map[string]string)

    err = json.Unmarshal(body, &params)

    if err != nil {

        // error handling

    }



    fmt.Println("username:", params["username"])

    fmt.Println("password:", params["password"])



}

I recommend creating a concrete struct rather than a map[string]string e.g.

type SigninBody struct {

    Username string `json:"username"`

    Password string `json:"password"`

}

And then passing it to json.Unmarshal like so:

var signinBody SinginBody

err = json.Unmarshal(body, &signinBody)

Here is a quick Playgroud