文件上传

上传单个文件

服务端

server.go

package main

import (
    "fmt"
    "io"
    "os"

    "net/http"

    "github.com/labstack/echo"
    "github.com/labstack/echo/middleware"
)

func upload(c echo.Context) error {
    // Read form fields
    name := c.FormValue("name")
    email := c.FormValue("email")

    //-----------
    // Read file
    //-----------

    // Source
    file, err := c.FormFile("file")
    if err != nil {
        return err
    }
    src, err := file.Open()
    if err != nil {
        return err
    }
    defer src.Close()

    // Destination
    dst, err := os.Create(file.Filename)
    if err != nil {
        return err
    }
    defer dst.Close()

    // Copy
    if _, err = io.Copy(dst, src); err != nil {
        return err
    }

    return c.HTML(http.StatusOK, fmt.Sprintf("<p>File %s uploaded successfully with fields name=%s and email=%s.</p>", file.Filename, name, email))
}

func main() {
    e := echo.New()

    e.Use(middleware.Logger())
    e.Use(middleware.Recover())

    e.Static("/", "public")
    e.POST("/upload", upload)

    e.Logger.Fatal(e.Start(":1323"))
}

客户端

index.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Single file upload</title>
</head>
<body>
<h1>Upload single file with fields</h1>

<form action="/upload" method="post" enctype="multipart/form-data">
    Name: <input type="text" name="name"><br>
    Email: <input type="email" name="email"><br>
    Files: <input type="file" name="file"><br><br>
    <input type="submit" value="Submit">
</form>
</body>
</html>

上传多个文件

服务端

server.go

package main

import (
    "fmt"
    "io"
    "os"

    "net/http"

    "github.com/labstack/echo"
    "github.com/labstack/echo/middleware"
)

func upload(c echo.Context) error {
    // Read form fields
    name := c.FormValue("name")
    email := c.FormValue("email")

    //------------
    // Read files
    //------------

    // Multipart form
    form, err := c.MultipartForm()
    if err != nil {
        return err
    }
    files := form.File["files"]

    for _, file := range files {
        // Source
        src, err := file.Open()
        if err != nil {
            return err
        }
        defer src.Close()

        // Destination
        dst, err := os.Create(file.Filename)
        if err != nil {
            return err
        }
        defer dst.Close()

        // Copy
        if _, err = io.Copy(dst, src); err != nil {
            return err
        }

    }

    return c.HTML(http.StatusOK, fmt.Sprintf("<p>Uploaded successfully %d files with fields name=%s and email=%s.</p>", len(files), name, email))
}

func main() {
    e := echo.New()

    e.Use(middleware.Logger())
    e.Use(middleware.Recover())

    e.Static("/", "public")
    e.POST("/upload", upload)

    e.Logger.Fatal(e.Start(":1323"))
}

客户端

index.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Multiple file upload</title>
</head>
<body>
<h1>Upload multiple files with fields</h1>

<form action="/upload" method="post" enctype="multipart/form-data">
    Name: <input type="text" name="name"><br>
    Email: <input type="email" name="email"><br>
    Files: <input type="file" name="files" multiple><br><br>
    <input type="submit" value="Submit">
</form>
</body>
</html>
文档更新时间: 2020-07-20 16:50   作者：kuteng