package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
    "strings"
)

func httpGet() {
    resp, err := http.Get("http://www.baidu.com")
    if err != nil {
        // handle error
    }

    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }

    fmt.Println(string(body))
}

func httpPost() {
    resp, err := http.Post("http://www.baidu.com",
        "application/x-www-form-urlencoded",
        strings.NewReader("name=baidu"))
    if err != nil {
        fmt.Println(err)
    }

    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }

    fmt.Println(string(body))
}

func httpPostForm() {
    resp, err := http.PostForm("http://www.baidu.com",
        url.Values{"key": {"Value"}, "id": {"123"}})

    if err != nil {
        // handle error
    }

    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }

    fmt.Println(string(body))

}

func httpDo() {
    client := &http.Client{}

    req, err := http.NewRequest("POST", "http://www.baidu.com", strings.NewReader("name=baidu"))
    if err != nil {
        // handle error
    }

    req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
    req.Header.Set("Cookie", "name=baidu")

    resp, err := client.Do(req)

    defer resp.Body.Close()

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

    fmt.Println(string(body))
}

func main() {
    httpGet()
    httpPost()
    httpPostForm()
    httpDo()
}