Golang如何实现基础的表单文件批量上传_Golang表单批量上传项目实战

  
  上传文件

func uploadHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method != "POST" {
        http.Error(w, "仅支持POST请求", http.StatusMethodNotAllowed)
        return
    }

    // 解析 multipart 表单，最大内存32MB
    err := r.ParseMultipartForm(32 << 20)
    if err != nil {
        http.Error(w, "解析表单失败", http.StatusBadRequest)
        return
    }

    files := r.MultipartForm.File["files"]

    for _, fileHeader := range files {
        // 打开上传的文件
        file, err := fileHeader.Open()
        if err != nil {
            http.Error(w, "无法打开文件", http.StatusInternalServerError)
            return
        }
        defer file.Close()

        // 创建本地保存的目标文件
        dst, err := os.Create("./uploads/" + fileHeader.Filename)
        if err != nil {
            http.Error(w, "创建文件失败", http.StatusInternalServerError)
            return
        }
        defer dst.Close()

        // 复制文件内容
        _, err = io.Copy(dst, file)
        if err != nil {
            http.Error(w, "保存文件失败", http.StatusInternalServerError)
            return
        }
    }

    w.Write([]byte("文件上传成功"))
}