How to use the Webman framework to implement file upload and download functions?

How to use the Webman framework to implement file upload and download functions?

Webman is a lightweight web framework written in Go language that provides a quick and easy way to develop web applications. In web development, file uploading and downloading are common functional requirements. In this article, we will introduce how to use the Webman framework to implement file upload and download functions, and attach code examples.

1. Implementation of the file upload function
File upload refers to transferring local files to the server through a Web application. In the Webman framework, you can use multipart/form-data to handle file uploads.

First, import the required packages in the main.go file:

import (
    "github.com/biezhi/gorm-paginator/pagination"
    "github.com/biezhi/gorm-paginator/pagination"
    "github.com/biezhi/gorm-paginator/pagination"
    "github.com/biezhi/gorm-paginator/pagination"
)

Then, add a route to handle file upload in the routes.go file:

func initRouter() *webman.Router {
    router := webman.NewRouter()

    // 文件上传接口
    router.POST("/upload", upload)

    return router
}

Continue Next, we need to implement the upload function in the handlers.go file:

func upload(c *webman.Context) {
    file, err := c.FormFile("file")
    if err != nil {
        c.String(http.StatusInternalServerError, "上传文件失败："+err.Error())
        return
    }

    // 保存文件到服务器
    err = c.SaveUploadedFile(file, "./uploads/"+file.Filename)
    if err != nil {
        c.String(http.StatusInternalServerError, "保存文件失败："+err.Error())
        return
    }

    c.String(http.StatusOK, "文件上传成功："+file.Filename)
}

In the above code, the c.FormFile("file") function is used to obtain the uploaded file, c.SaveUploadedFile(file, "./uploads /" file.Filename) function is used to save files to the server. Finally, use the c.String function to return a successful upload message.

2. Implementation of file download function
File download refers to downloading files from the server to the local. In the Webman framework, you can use the c.File function to download files.

Add a route for processing file downloads in the routes.go file:

func initRouter() *webman.Router {
    router := webman.NewRouter()

    // 文件上传接口
    router.POST("/upload", upload)
    // 文件下载接口
    router.GET("/download/:filename", download)

    return router
}

Then, implement the download function in the handlers.go file:

func download(c *webman.Context) {
    filename := c.Param("filename")

    c.File("./uploads/" + filename)
}

In the above code, c The .Param("filename") function is used to get the file name in the URL. Then, use the c.File function to return the specified file to the client to implement the file download function.

3. Summary
In this article, we introduced how to use the Webman framework to implement file upload and download functions. By handling routing and request parameters, we can easily implement these functions. I hope this article will help you understand the file processing capabilities of the Webman framework.

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