Simple REST API client in Go ( Google Go )

After writting many Golang REST APIs, I realised need of a REST API client to test these APIs. Becuase CURL commands are complex.

Here is the code

	package main

	import(
	"flag"
	"fmt"
	"net/http"
	"strings"
	"io/ioutil"
	"encoding/json"
	"gopkg.in/mgo.v2/bson"
	"text/tabwriter"
	"os"
	)
	// The main structure for database
	type Panda struct {
	Name string `json:"name"` // Name of Panda
	}

	func main(){
	url := flag.String("url", "", "API endpoint URL")
	method := flag.String("method", "", "API Method ( get, post, put, delete)")
	data := flag.String("data", "", "JSON Body")
	flag.Parse()
	req := new(http.Request)
	client := &http.Client{}

	switch *method{
	case "get":
	req, _ = http.NewRequest("GET", *url, nil)
	case "post":
	req, _ = http.NewRequest("POST", url, strings.NewReader(data))
	case "delete":
	req, _ = http.NewRequest("DELETE", *url, nil)
	case "put":
	req, _ = http.NewRequest("PUT", url, strings.NewReader(data))
	default:
	}
	fmt.Println("\n\n")
	resp, _ := client.Do(req)
	fmt.Println("\n\n---------------------------------Response Headers------------------------------")
	fmt.Println(resp.Header)
	body, _ := ioutil.ReadAll(resp.Body)
	m := *method
	if m == "get" {
	var pandas []Panda
	err := json.Unmarshal(body, &pandas)
	if err != nil {
	panic(err)
	}
	w := new(tabwriter.Writer)
	w.Init(os.Stdout, 0, 8, 0, '\t', 0)
	fmt.Println("\n\n---------------------------------Response Body---------------------------------")
	fmt.Fprintln(w, "Id\t Name\t")
	for _, panda := range pandas{
	fmt.Fprintf(w,"%s \t %s \t\n",panda.Id.Hex(), panda.Name)
	}
	w.Flush()
	}
	fmt.Println("\n\n")
	}

view raw client.go hosted with ❤ by GitHub

Here is an example use case for Go JSON REST API with mongoDb database


go run client.go -url=https://rest-golangapi.rhcloud.com/pandas -method=get


go run client.go -url=https://rest-golangapi.rhcloud.com/pandas/ -method=post -data='{"Name":"Name of Panda"}'


go run client.go -url=https://rest-golangapi.rhcloud.com/pandas/{Id} -method=delete

go run client.go -url=https://rest-golangapi.rhcloud.com/pandas/{Id} -method=put -data='{"Name":"New name"}'

Labels: api, golang

By : Motyar+ @motyar