Sending JSON Via an HTTP POST Request in Go

{
  "description": "Buy cheese and bread for breakfast."
}

package main

import (
    "bytes"
    "log"
    "net/http"
)

func main() {
    // Define the JSON body as a string.
    body := `{"description": "Buy cheese and bread for breakfast."}`

    // Make the request.
    response, err := http.Post("https://example.com/endpoint", "application/json", bytes.NewBufferString(body))
    if err != nil {
        log.Fatalf("POST failed: %s", err)
    }

    // Do something with the response.
    log.Printf("POST returned with %d status", response.StatusCode)
}

package main

import (
    "bytes"
    "encoding/json"
    "log"
    "net/http"
)

// Task contains the fields that you'd like to marshal (or serialise) as JSON.
type Task struct {
    Title       string `json:"title"`
    Description string `json:"description"`
}

func main() {
    // Define a Task instance.
    task := Task{
        Title:       "Morning task",
        Description: "Buy cheese and bread for breakfast.",
    }

    // Generate a byte slice representing the Task.
    body, err := json.Marshal(&task)
    if err != nil {
        log.Fatalf("Failed to marshal JSON: %s", err)
    }

    // Make the request.
    // Note that this time, `body` is a slice of bytes, so we use `bytes.NewBuffer` instead.
    response, err := http.Post("https://example.com/endpoint", "application/json", bytes.NewBuffer(body))
    if err != nil {
        log.Fatalf("POST failed: %s", err)
    }

    // Do something with the response.
    log.Printf("POST returned with %d status", response.StatusCode)
}