文件上传

上传单个文件

服务端

server.go

  1. package main
  3. import (
  4.     "fmt"
  5.     "io"
  6.     "os"
  8.     "net/http"
  10.     "github.com/labstack/echo"
  11.     "github.com/labstack/echo/middleware"
  12. )
  14. func upload(c echo.Context) error {
  15.     // Read form fields
  16.     name := c.FormValue("name")
  17.     email := c.FormValue("email")
  19.     //-----------
  20.     // Read file
  21.     //-----------
  23.     // Source
  24.     file, err := c.FormFile("file")
  25.     if err != nil {
  26.         return err
  27.     }
  28.     src, err := file.Open()
  29.     if err != nil {
  30.         return err
  31.     }
  32.     defer src.Close()
  34.     // Destination
  35.     dst, err := os.Create(file.Filename)
  36.     if err != nil {
  37.         return err
  38.     }
  39.     defer dst.Close()
  41.     // Copy
  42.     if _, err = io.Copy(dst, src); err != nil {
  43.         return err
  44.     }
  46.     return c.HTML(http.StatusOK, fmt.Sprintf("<p>File %s uploaded successfully with fields name=%s and email=%s.</p>", file.Filename, name, email))
  47. }
  49. func main() {
  50.     e := echo.New()
  52.     e.Use(middleware.Logger())
  53.     e.Use(middleware.Recover())
  55.     e.Static("/", "public")
  56.     e.POST("/upload", upload)
  58.     e.Logger.Fatal(e.Start(":1323"))
  59. }

客户端

index.html

  1. <!doctype html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="utf-8">
  5.     <title>Single file upload</title>
  6. </head>
  7. <body>
  8. <h1>Upload single file with fields</h1>
  10. <form action="/upload" method="post" enctype="multipart/form-data">
  11.     Name: <input type="text" name="name"><br>
  12.     Email: <input type="email" name="email"><br>
  13.     Files: <input type="file" name="file"><br><br>
  14.     <input type="submit" value="Submit">
  15. </form>
  16. </body>
  17. </html>

上传多个文件

服务端

server.go

  1. package main
  3. import (
  4.     "fmt"
  5.     "io"
  6.     "os"
  8.     "net/http"
  10.     "github.com/labstack/echo"
  11.     "github.com/labstack/echo/middleware"
  12. )
  14. func upload(c echo.Context) error {
  15.     // Read form fields
  16.     name := c.FormValue("name")
  17.     email := c.FormValue("email")
  19.     //------------
  20.     // Read files
  21.     //------------
  23.     // Multipart form
  24.     form, err := c.MultipartForm()
  25.     if err != nil {
  26.         return err
  27.     }
  28.     files := form.File["files"]
  30.     for _, file := range files {
  31.         // Source
  32.         src, err := file.Open()
  33.         if err != nil {
  34.             return err
  35.         }
  36.         defer src.Close()
  38.         // Destination
  39.         dst, err := os.Create(file.Filename)
  40.         if err != nil {
  41.             return err
  42.         }
  43.         defer dst.Close()
  45.         // Copy
  46.         if _, err = io.Copy(dst, src); err != nil {
  47.             return err
  48.         }
  50.     }
  52.     return c.HTML(http.StatusOK, fmt.Sprintf("<p>Uploaded successfully %d files with fields name=%s and email=%s.</p>", len(files), name, email))
  53. }
  55. func main() {
  56.     e := echo.New()
  58.     e.Use(middleware.Logger())
  59.     e.Use(middleware.Recover())
  61.     e.Static("/", "public")
  62.     e.POST("/upload", upload)
  64.     e.Logger.Fatal(e.Start(":1323"))
  65. }

客户端

index.html

  1. <!doctype html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="utf-8">
  5.     <title>Multiple file upload</title>
  6. </head>
  7. <body>
  8. <h1>Upload multiple files with fields</h1>
  10. <form action="/upload" method="post" enctype="multipart/form-data">
  11.     Name: <input type="text" name="name"><br>
  12.     Email: <input type="email" name="email"><br>
  13.     Files: <input type="file" name="files" multiple><br><br>
  14.     <input type="submit" value="Submit">
  15. </form>
  16. </body>
  17. </html>