在golang webapp中处理post请求时显示进度

package main

import (
	"fmt"
	"net/http"
	"time"
)

func main() {
	http.HandleFunc("/upload", uploadHandler)
	http.ListenAndServe(":8080", nil)
}

func uploadHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method == "POST" {
		// 创建通道来传递进度信息
		progress := make(chan int)

		// 启动goroutine来处理post请求并显示进度
		go processUpload(r, progress)

		// 使用Ajax或WebSocket等技术实时获取并显示进度信息
		for p := range progress {
			fmt.Fprintf(w, "Progress: %d%%\n", p)
			w.(http.Flusher).Flush()
		}

		fmt.Fprintln(w, "Upload completed!")
	} else {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
	}
}

func processUpload(r *http.Request, progress chan int) {
	// 模拟处理过程，每隔1秒更新进度
	for i := 0; i <= 100; i += 10 {
		time.Sleep(1 * time.Second)
		progress <- i
	}

	close(progress)
}