Golang을 사용하여 양식 양식 파일 업로드를 구현하는 방법은 무엇입니까?

<form action="/upload" method="POST" enctype="multipart/form-data">
  <input type="file" name="file">
  <input type="submit" value="上传">
</form>

func uploadHandler(w http.ResponseWriter, r *http.Request) {
  err := r.ParseMultipartForm(32 << 20) // 设置最大文件大小为 32MB
  if err != nil {
    http.Error(w, "无法解析表单数据", http.StatusBadRequest)
    return
  }

  // 获取文件
  file, _, err := r.FormFile("file")
  if err != nil {
    http.Error(w, "无法获取上传文件", http.StatusInternalServerError)
    return
  }
  defer file.Close()

  // 保存文件
  dst, err := os.Create("uploaded_file")
  if err != nil {
    http.Error(w, "无法创建目标文件", http.StatusInternalServerError)
    return
  }
  defer dst.Close()

  if _, err := io.Copy(dst, file); err != nil {
    http.Error(w, "无法写入文件", http.StatusInternalServerError)
    return
  }

  http.Redirect(w, r, "/success", http.StatusFound)
}

package main

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

func uploadHandler(w http.ResponseWriter, r *http.Request) {
  err := r.ParseMultipartForm(32 << 20)
  if err != nil {
    http.Error(w, "无法解析表单数据", http.StatusBadRequest)
    return
  }

  file, _, err := r.FormFile("file")
  if err != nil {
    http.Error(w, "无法获取上传文件", http.StatusInternalServerError)
    return
  }

  filename := "./uploaded_file_" + r.Form.Get("file")
  dst, err := os.Create(filename)
  if err != nil {
    http.Error(w, "无法创建目标文件", http.StatusInternalServerError)
    return
  }

  if _, err := io.Copy(dst, file); err != nil {
    http.Error(w, "无法写入文件", http.StatusInternalServerError)
    return
  }

  fmt.Fprintf(w, "文件 %s 上传成功！", filename)
}

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