Uploading a file is a process in which a user uploads a file from the client to the server. Here is a simple example of uploading a file:
First write a front-end page:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>index</title>
</head>
<body>
<form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" name="f1">
<input type="submit" value="上传">
</form>
</body>
</html> The result is as follows:
- Remember to add this attribute to the html form tag: enctype="multipart/form-data" for binary file transfer.
Then write this in main.go:
package main
import (
"github.com/gin-gonic/gin"
"net/http"
"path"
)
func main() {
r := gin.Default()
r.LoadHTMLFiles("./index.html")
r.GET("/index", func(c *gin.Context) {
c.HTML(http.StatusOK, "index.html", nil)
})
r.POST("/upload", func(c *gin.Context) {
//从请求中读取文件
f, err := c.FormFile("f1")
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{
"error": err.Error(),
})
} else {
//将文件保存在服务器
//dst := fmt.Sprintf("./%s", f.Filename)//写法1
dst := path.Join("./", f.Filename)
c.SaveUploadedFile(f, dst)
c.JSON(http.StatusOK, gin.H{
"status": "ok",
})
}
})
r.Run(":9090")
} The result uploads the file successfully:
📢
- The default memory limit for submitting files using multipart forms is 32Mb, which can be accessed via
router.MaxMultipartMemory属性进行修改 - Multiple file upload reference: Blog
Reference: bilibili
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