Introduction
File upload is already supported in the Gin framework, including single file upload and multi-file upload.
Single file upload
In the Gin framework, the FormFile("param") uploaded single file information can be received through the use of the following code:
- Code example
//--- main.go ---------------
package main
import (
"fmt"
"go_use/practise"
"github.com/gin-gonic/gin"
)
func main() {
// Create a default routing engine
engine := gin.Default()
// Register routing
practise.TestRecFile(engine)
_ = engine.Run(":9090")
}
//---file_receive.go-------
// Receive a single file
func TestRecFile(engine *gin.Engine) {
// Set the memory limit to 8M, the default is 32MiB
engine.MaxMultipartMemory = 8 << 20
engine.POST("/file", func(context *gin.Context) {
file, err := context.FormFile("img")
if err != nil {
context.JSON(500, gin.H{"err": err})
return
}
// file rename
dst := "./tmp/" + file.Filename
fmt.Println(dst)
// save image
err = context.SaveUploadedFile(file, dst)
if err != nil {
context.JSON(500, gin.H{"err": "Failed to save file: " + err.Error()})
return
}
context.JSON(200, gin.H{
"msg": "success",
"name": file.Filename,
"size": file.Size,
})
})
}- Request return
# Upload a single file
# File is stored in the tmp folder
$ curl -X GET http://127.0.0.1:9090/file
{"msg":"success","name":"steve.jpg","size":"79314"}Multiple file upload
In the Gin framework, you can MultipartForm() receive multiple uploaded file information through the use of the following code:
//--- main.go ---------------
package main
import (
"go_use/practise"
"github.com/gin-gonic/gin"
)
func main() {
// create a default routing engine
engine := gin.Default()
// register routes
practise.TestRecFiles(engine)
_ = engine.Run(":9090")
}
//---file_receive.go-------
// Receive multiple files
func TestRecFiles(engine *gin.Engine) {
// Set the memory limit to 8M, the default is 32MiB
engine.MaxMultipartMemory = 8 << 20
engine.POST("/files", func(context *gin.Context) {
// Receive image
form, _ := context.MultipartForm()
files := form.File["imgList[]"]
// Traverse save
for _, file := range files {
_ = context.SaveUploadedFile(file, "./tmp/"+file.Filename)
}
context.String(200, "Saved successfully!")
})
}- Request return
# Upload multiple files
# Files stored in the tmp folder
$ curl -X GET http://127.0.0.1:9090/files
# Returns plain text: Saved successfully!
