Go语言：RESTful API接口在服务端读取POST的JSON数据

如果客户端POST表单数据则服务端可以直接调用Request的ParseForm()函数来获取对应参数和取值，而RESTful API接口POST的是JSON数据，服务端需要获取POST消息体的原始数据，方法如下：

server.go

<pre><code class="language-Go">package main import ( "fmt" "io" "io/ioutil" "log" "net/http" ) func main() { handler := func(w http.ResponseWriter, req *http.Request) { b, e := ioutil.ReadAll(req.Body) if e != nil { fmt.Printf("%v\n", e) } else { fmt.Printf("%s\n", string(b)) } io.WriteString(w, "OK\n") } http.HandleFunc("/", handler) log.Fatal(http.ListenAndServe(":8889", nil)) } </code></pre>

client.go

<pre><code class="language-Go">package main import ( "bytes" "fmt" "io/ioutil" "log" "net/http" "time" ) func main() { url := "http://127.0.0.1:8889/" data := []byte(` { "book":[ { "id":"444", "language":"C", "edition":"First", "author":"Dennis Ritchie " }, { "id":"555", "language":"C ", "edition":"second", "author":" Bjarne Stroustrup " } ] } `) req, err := http.NewRequest("POST", url, bytes.NewBuffer(data)) if err != nil { log.Fatal("Error reading request. ", err) } // Set client timeout client := &http.Client{Timeout: time.Second * 10} resp, err := client.Do(req) if err != nil { log.Fatal("Error reading response. ", err) } defer resp.Body.Close() fmt.Println("response status:", resp.StatusCode) body, err := ioutil.ReadAll(resp.Body) if err != nil { log.Fatal("Error reading body. ", err) } fmt.Printf("response body:%s\n", body) }</code></pre>

测试从客户端向服务端POST JSON数据：

服务端输出：

<pre><code> { "book":[ { "id":"444", "language":"C", "edition":"First", "author":"Dennis Ritchie " }, { "id":"555", "language":"C ", "edition":"second", "author":" Bjarne Stroustrup " } ] } </code></pre>

客户端输出：

<pre><code>response status: 200 response body:OK </code></pre>

 

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