Go 語言 POST 請求詳解與實戰應用

import (
    "bytes"
    "io/ioutil"
    "net/http"
)

func postRequest(url, contentType string, body []byte) ([]byte, error) {
    req, err := http.NewRequest("POST", url, bytes.NewBuffer(body))
    if err != nil {
        return nil, err
    }
    req.Header.Set("Content-Type", contentType)

    client := &http.Client{}

    resp, err := client.Do(req)
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        return nil, err
    }

    return body, nil
}

package main

import (
    "fmt"
    "net/http"
    "os"
)

func main() {
    url := "http://example.com"
    contentType := "application/json"
    body := []byte(`{"name": "John Smith", "age": 30}`)

    resp, err := postRequest(url, contentType, body)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    fmt.Println(string(resp))
}