w.Header().Add("Content-Type", "application/octet-stream")

w.Header().Add("Content-Disposition", "attachment; filename=\""+filename+"\"")

package DownloadController

import (

	"fmt"

	"net/http"

	"strings"

	"Project/Utils"

	"Project/Server/Download"

)

func DownloadController(w http.ResponseWriter, r *http.Request) {

	defer r.Body.Close()

	w.Header().Set("Access-Control-Allow-Origin", "*")             // 允许访问所有域

	w.Header().Add("Access-Control-Allow-Headers", "Content-Type") // header的类型

	switch r.Method {

	case "POST", "GET":

		{

			urlname := r.FormValue("url")

			if strings.EqualFold(urlname, "") {

				resp_json := Utils.GetRespJson(400, "请求参数错误！", nil)

				fmt.Fprintln(w, string(resp_json))

				return

			}

			filename, content, err := DownloadServer.Download(urlname)

			w.Header().Add("Content-Type", "application/octet-stream")

			w.Header().Add("Content-Disposition", "attachment; filename=\""+filename+"\"")

			if err != nil {

				fmt.Println("Read File Err:", err.Error())

				resp_json := Utils.GetRespJson(400, "下载失败！", nil)

				fmt.Fprintln(w, string(resp_json))

				return

			} else {

				w.Write(content)

				fmt.Println("Download filename=" + filename + " OK")

				//resp_json := Utils.GetRespJson(200, "下载成功！", nil)

				//fmt.Fprintln(w, string(resp_json))

			}

			return

		}

	default:

		resp_json := Utils.GetRespJson(400, "错误的请求方式！", nil)

		fmt.Fprintln(w, string(resp_json))

		return

	}

}

package DownloadServer

import (

	"fmt"

	"Project/Utils/Config"

	"os"

	"io/ioutil"

	"strings"

	"net/url"

	"time"

)

func Download(urlname string) (filename string, content []byte, err error) {

	pos1 := strings.LastIndex(urlname,"Resources")

	urlname = urlname[pos1:]

	path := Config.GetValue("project_path") + "/web/"

	file, err := os.Open(path + urlname)

	if err != nil {

		fmt.Println(err)

		return

	}

	defer file.Close()

	content, err = ioutil.ReadAll(file)

	pos := strings.LastIndex(urlname, "/") + 1

	zipNameNew := urlname[pos:]

	// 防止中文乱码

	timeStr := time.Now().Format("2006010203040506")

	filename = url.QueryEscape("Res" + timeStr + "_" + zipNameNew)

	return

}