go-http-url-request

介绍golang关于http请求和url之间的用法：\

• http-server

import (
    "fmt"
    "net/http"
)

func main() {
    //http://127.0.0.1:8000/go
    // 单独写回调函数
    http.HandleFunc("/go", myHandler)
    //http.HandleFunc("/ungo",myHandler2 )
    // addr：监听的地址
    // handler：回调函数
    http.ListenAndServe("127.0.0.1:8000", nil)
}

// handler函数
func myHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Println(r.RemoteAddr, "连接成功")
    // 请求方式：GET POST DELETE PUT UPDATE
    fmt.Println("method:", r.Method)
    // /go
    fmt.Println("url:", r.URL.Path)
    fmt.Println("header:", r.Header)
    fmt.Println("body:", r.Body)
    // 回复
    w.Write([]byte("www.5lmh.com"))
}

• http参数解析

package main

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

//http-url-request
func main() {
    //http-query
    apiUrl := "http://127.0.0.1:9090/get?id=1"
    // URL param
    data := url.Values{}
    data.Set("name", "枯藤")
    data.Set("age", "18")
    u, err := url.ParseRequestURI(apiUrl)
    fmt.Printf("%#v \n",u)
    if err != nil {
        fmt.Printf("parse url requestUrl failed,err:%v\n", err)
    }
    u.RawQuery += "&"+data.Encode() // URL encode
    fmt.Println(u.RawQuery) //id=1&age=18&name=%E6%9E%AF%E8%97%A4
    fmt.Println(u.String()) //http://127.0.0.1:9090/get?id=1&age=18&name=%E6%9E%AF%E8%97%A4
    http.Get(u.String())

    //数据接收解析
    data2 :=u.Query()
    data2.Get("id")
}

func postDemo(){
    //http-body
    url := "http://127.0.0.1:9090/post"
    // 表单数据
    //contentType := "application/x-www-form-urlencoded"
    //data := "name=枯藤&age=18"
    // json
    contentType := "application/json"
    data := `{"name":"枯藤","age":18}`
    http.Post(url, contentType, strings.NewReader(data))
    //http.PostForm("http://5lmh.com/form",
    //  url.Values{"key": {"Value"}, "id": {"123"}})

    //数据接收解析
    var r *http.Request
    defer r.Body.Close()
    // 1. 请求类型是application/x-www-form-urlencoded时解析form数据
    r.ParseForm()
    fmt.Println(r.PostForm) // 打印form数据
    fmt.Println(r.PostForm.Get("name"), r.PostForm.Get("age"))
    // 2. 请求类型是application/json时从r.Body读取数据
    input,_:=ioutil.ReadAll(r.Body)
    //再将body放回去
    r.Body = ioutil.NopCloser(bytes.NewBuffer(input))
}