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go 单文件上传，多文件上传

单文件上传示例：

 main.go

router := router.InitRouter()

router.Run()

 

router/router.go

var router = gin.Default()

func init() {
    //加载自定义函数
    if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
        v.RegisterValidation("capt", captcha.VerifyCaptcha)
    }

//加载静态文件
    router.Static("upload", "upload/")
    //加载view
    router.LoadHTMLGlob("view/*")
}

func InitRouter() *gin.Engine {
    router.GET("/index", user.Index) 
    router.POST("/upload", upload.Upload)
    return router
}

 

controller/user/index.go

func Index(c *gin.Context) {
    c.HTML(http.StatusOK, "upload.html", nil)
}

 

 common/upload/upload.go代码如下：

 

// 定义上传路径
const UPLOAD_DIR = "upload"

func Upload(c *gin.Context) {
    file, err := c.FormFile("upfile")
    if err != nil {
        c.JSON(http.StatusForbidden, gin.H{
            "code":  400,
            "error": err.Error(),
        })
        return
    }

    arr := strings.Split(file.Filename, ".")
    filepath, ok := checkExtAndgetFilePath(arr[1])
    if ok != true {
        c.JSON(http.StatusForbidden, gin.H{
            "code":  400,
            "error": "invalid ext",
        })
        return
    }

    if err = c.SaveUploadedFile(file, filepath); err != nil {
        c.JSON(http.StatusForbidden, gin.H{
            "code":  400,
            "error": "upload failed",
        })
        return
    }

    c.JSON(http.StatusOK, gin.H{
        "code":    200,
        "error":   "upload success",
        "img_url": filepath,
    })
    return
}

// 检查扩展名，并返回文件路径
func checkExtAndgetFilePath(fileExt string) (string, bool) {
    allowExt := map[string]bool{
        "jpg":  true,
        "png":  true,
        "jpeg": true,
    }
    if _, ok := allowExt[fileExt]; !ok {
        return "", false
    }
    //创建文件夹
    if _, ok := os.Stat(UPLOAD_DIR); ok != nil {
        os.Mkdir(UPLOAD_DIR, os.ModePerm)
    }
    filePath := UPLOAD_DIR + "/" + strconv.FormatInt(time.Now().Unix(), 10) + "." + fileExt
    return filePath, true
}

 

 

view/upload.html 模板文件

<body>
<h3>单文件上传</h3>
<form action="/upload" method="post" enctype="multipart/form-data">
   <p><input type="file" name="upfile" id="upfile" /> <input type="submit" value="上传" /></p>
</form>
</body>

 

 

上传成功后返回：

 

 

 

多文件上传示例：

router/router.go

 

var router = gin.Default()

func init() {
    //加载自定义函数
    if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
        v.RegisterValidation("capt", captcha.VerifyCaptcha)
    }
    //加载静态文件
    router.Static("upload", "upload/")

    //加载view
    router.LoadHTMLGlob("view/*")
}

func InitRouter() *gin.Engine {
    router.GET("/index", user.Index)
    router.POST("/upload", upload.UploadMul)
    return router
}

 

common/upload.go

// 定义上传路径
const UPLOAD_DIR = "upload"
func UploadMul(c *gin.Context) {
    form, err := c.MultipartForm()
    if err != nil {
        c.JSON(http.StatusForbidden, gin.H{
            "code":  400,
            "error": err.Error(),
        })
        return
    }
    var urls []string
    files := form.File["upfile"]
    for _, file := range files {
        arr := strings.Split(file.Filename, ".")
        filepath, ok := checkExtAndgetFilePath(arr[1])
        if ok != true {
            c.JSON(http.StatusForbidden, gin.H{
                "code":  400,
                "error": "invalid ext",
            })
            return
        }

        if err = c.SaveUploadedFile(file, filepath); err != nil {
            c.JSON(http.StatusForbidden, gin.H{
                "code":  400,
                "error": "upload failed",
            })
            return
        }
        urls = append(urls, filepath)
    }

    c.JSON(http.StatusOK, gin.H{
        "code":    200,
        "error":   "upload success",
        "img_url": urls,
    })
    return
}

// 检查扩展名，并返回文件路径
func checkExtAndgetFilePath(fileExt string) (string, bool) {
    allowExt := map[string]bool{
        "jpg":  true,
        "png":  true,
        "jpeg": true,
    }
    if _, ok := allowExt[fileExt]; !ok {
        return "", false
    }
    //创建文件夹
    if _, ok := os.Stat(UPLOAD_DIR); ok != nil {
        os.Mkdir(UPLOAD_DIR, os.ModePerm)
    }
    filePath := UPLOAD_DIR + "/" + strconv.FormatInt(time.Now().UnixNano(), 10) + "." + fileExt
    return filePath, true
}

view/upload.html

<body>
<h3>单文件上传</h3>
<form action="/upload" method="post" enctype="multipart/form-data">
    <p><input type="file" name="upfile" multiple id="upfile" /> <input type="submit" value="上传" /></p>
</form>
</body>

其他文件跟单文件上传一致。

 

上传的时候按住ctrl，可选择多张图片，上传后效果：

 

 

上传后，需要静态文件显示的话，在路由中需要增加一行代码：

router.Static("upload", "upload/") //加载静态文件

不然，通过浏览器无法打开图片

 

完结

 

posted @ 2023-04-12 23:04  yangphp  阅读(165)  评论(0)  编辑  收藏  举报