We’ll explore how to make an HTTP GET request in Go. We will fetch the JSON content from an API endpoint and display the results on the console.
Create a new folder called http-request.
mkdir http-request
cd http-request
touch main.go
Open the main.go and import the necessary packages.
package main
import (
"encoding/json"
"fmt"
"net/http"
)
Make the HTTP request to https://jsonplaceholder.cypress.io/todos/11
func main() {
resp, err := http.Get("https://jsonplaceholder.cypress.io/todos/11")
if err != nil {
print(err)
}
defer resp.Body.Close()
}
Create a struct that models the data received from the API.
type PostResponse struct {
UserId int `json:"userId"`
Id int `json:"id"`
Title string `json:"title"`
Completed bool `json:"completed"`
}
func main() {
...
}
Let's decode the JSON response using json.NewDecoder function that takes in the response body and a decode function that takes in a variable of type PostResponse.
var post PostResponse
if err := json.NewDecoder(resp.Body).Decode(&post); err != nil {
print(err)
}
fmt.Printf("UserId: %v\n", post.UserId)
fmt.Printf("Id: %v\n", post.Id)
fmt.Printf("Title: %v\n", post.Title)
fmt.Printf("Completed: %v\n", post.Completed)
Here is the complete working code.
package main
import (
"encoding/json"
"fmt"
"net/http"
)
type PostResponse struct {
UserId int `json:"userId"`
Id int `json:"id"`
Title string `json:"title"`
Completed bool `json:"completed"`
}
func main() {
// Make the http request
resp, err := http.Get("https://jsonplaceholder.cypress.io/todos/11")
if err != nil {
print(err)
}
// Close the body
defer resp.Body.Close()
var post PostResponse
// Decode the JSON response
if err := json.NewDecoder(resp.Body).Decode(&post); err != nil {
print(err)
}
// Print the result on the console
fmt.Printf("UserId: %v\n", post.UserId)
fmt.Printf("Id: %v\n", post.Id)
fmt.Printf("Title: %v\n", post.Title)
fmt.Printf("Completed: %v\n", post.Completed)
}
I hope you found this article insightful.
Let's connect 🌎
- My blog kirandev.com
- Follow me on Twitter
- Find me on Github
Top comments (0)