使用GoRest处理POST请求中的HTML表单数据

package main

import (
    "fmt"
    "net/http"
    "net/url"

    "github.com/gorilla/mux" // 使用gorilla/mux，更灵活的路由
)

// 定义一个处理POST请求的handler
func handlePost(w http.ResponseWriter, r *http.Request) {
    // 确保请求方法是POST
    if r.Method != http.MethodPost {
        http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
        return
    }

    // 解析表单数据
    err := r.ParseForm()
    if err != nil {
        http.Error(w, "Error parsing form", http.StatusBadRequest)
        return
    }

    // 获取表单数据
    formData := r.PostForm

    // 打印表单数据
    fmt.Println("Received form data:")
    for key, values := range formData {
        fmt.Printf("%s: %s\n", key, values)
    }

    // 返回响应
    fmt.Fprintln(w, "Form data received successfully!")
}

func main() {
    // 创建一个路由器
    r := mux.NewRouter()

    // 注册POST请求的handler
    r.HandleFunc("/api/save/", handlePost).Methods("POST")

    // 启动服务器
    fmt.Println("Server listening on port 8787")
    http.ListenAndServe(":8787", r)
}

<div>
  key: <input type="text" id="key" name="key" /><br />
  json: <input type="text" id="json" name="json" /><br />
  <button onclick="send_using_ajax()">发送</button>
</div>

<script>
function send_using_ajax() {
  var key = document.getElementById("key").value;
  var json = document.getElementById("json").value;

  var data = {
    key: key,
    json: json
  };

  var xhr = new XMLHttpRequest();
  xhr.open("POST", "http://127.0.0.1:8787/api/save/", true);
  xhr.setRequestHeader("Content-Type", "application/json"); // 设置请求头
  xhr.onload = function() {
    if (xhr.status === 200) {
      alert("数据发送成功！");
    } else {
      alert("数据发送失败！");
    }
  };
  xhr.send(JSON.stringify(data)); // 将数据转换为JSON字符串并发送
}
</script>

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "log"
    "net/http"

    "github.com/gorilla/mux"
)

type RequestData struct {
    Key  string `json:"key"`
    Json string `json:"json"`
}

func handlePost(w http.ResponseWriter, r *http.Request) {
    // 读取请求体
    body, err := ioutil.ReadAll(r.Body)
    if err != nil {
        http.Error(w, "Error reading request body", http.StatusBadRequest)
        return
    }
    defer r.Body.Close()

    // 解析JSON数据
    var data RequestData
    err = json.Unmarshal(body, &data)
    if err != nil {
        http.Error(w, "Error unmarshalling JSON", http.StatusBadRequest)
        return
    }

    // 打印接收到的数据
    fmt.Printf("Received data: %+v\n", data)

    // 返回响应
    fmt.Fprintln(w, "Data received successfully!")
}

func main() {
    r := mux.NewRouter()
    r.HandleFunc("/api/save/", handlePost).Methods("POST")

    fmt.Println("Server listening on port 8787")
    log.Fatal(http.ListenAndServe(":8787", r))
}