go http 传递json数据

红太狼 2022-06-04 03:42 637阅读 0赞

上篇[博文][Link 1]中简单介绍了Go HTTP的Server 和Client。本文介绍如何在HTTP中传递json格式的数据。

## Server ##

package  main
    
    import (
            "encoding/json"
            "fmt"
            "html"
            "io/ioutil"
            "log"
            "net/http"
    
    )
    
    
    type Cmd struct {
            ReqType int
            FileName string
    
    }
    
    func main() {
    
            http.HandleFunc("/bar", func (w http.ResponseWriter, r *http.Request){
                    fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))
    
                    if r.Method == "POST" {
                            b, err := ioutil.ReadAll(r.Body)
                            if err != nil {
                                    log.Println("Read failed:", err)
                            }
                            defer r.Body.Close()
    
                            cmd := &Cmd{}
                            err = json.Unmarshal(b, cmd)
                            if err != nil {
                                    log.Println("json format error:", err)
                            }
    
                            log.Println("cmd:", cmd)
                    } else {
    
                            log.Println("ONly support Post")
                            fmt.Fprintf(w, "Only support post")
                    }
    
            })
    
            log.Fatal(http.ListenAndServe(":8080", nil))
    
    }

接收数据，进行json解码。

## Client ##

//post json
    package main
    
    import (
        "bytes"
        "encoding/json"
        "io/ioutil"
        "log"
        "net/http"
    
    )
    
    type Cmd struct {
    
        ReqType int
        FileName string
    
    }
    
    
    func main() {
    
        url := "http://127.0.0.1:8080/bar"
        contentType := "application/json;charset=utf-8"
    
        cmd := Cmd{ReqType: 12, FileName: "plugin"}
        b ,err := json.Marshal(cmd)
        if err != nil {
            log.Println("json format error:", err)
            return
        }
    
        body := bytes.NewBuffer(b)
    
        resp, err := http.Post(url, contentType, body)
        if err != nil {
            log.Println("Post failed:", err)
            return
        }
    
        defer resp.Body.Close()
    
    
        content, err := ioutil.ReadAll(resp.Body)
        if err != nil {
            log.Println("Read failed:", err)
            return
        }
    
    
        log.Println("content:", string(content))
    
    }

将要发送的数据转为json格式再发送。

## 参考 ##

[http://www.01happy.com/golang-http-client-get-and-post/][http_www.01happy.com_golang-http-client-get-and-post]  
[http://blog.csdn.net/typ2004/article/details/38669949][http_blog.csdn.net_typ2004_article_details_38669949]

[Link 1]: http://blog.csdn.net/lanyang123456/article/details/78702817%20http
[http_www.01happy.com_golang-http-client-get-and-post]: http://www.01happy.com/golang-http-client-get-and-post/
[http_blog.csdn.net_typ2004_article_details_38669949]: http://blog.csdn.net/typ2004/article/details/38669949