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Gin Web Framework

Multiple files

Use c.MultipartForm to receive multiple files uploaded in a single request. The files are grouped by the form field name — use the same field name for all files you want to upload together.

package main


import (
  "fmt"
  "log"
  "net/http"
  "path/filepath"


  "github.com/gin-gonic/gin"
)


func main() {
  router := gin.Default()
  // Set a lower memory limit for multipart forms (default is 32 MiB)
  router.MaxMultipartMemory = 8 << 20 // 8 MiB


  router.POST("/upload", func(c *gin.Context) {
    // Multipart form
    form, err := c.MultipartForm()
    if err != nil {
      c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
      return
    }
    files := form.File["files"]


    for _, file := range files {
      log.Println(file.Filename)


      // Upload the file to specific dst.
      dst := filepath.Join("./files/", filepath.Base(file.Filename))
      c.SaveUploadedFile(file, dst)
    }
    c.String(http.StatusOK, fmt.Sprintf("%d files uploaded!", len(files)))
  })


  router.Run(":8080")
}

Test it

Terminal window
curl -X POST http://localhost:8080/upload \
  -F "files=@/path/to/test1.zip" \
  -F "files=@/path/to/test2.zip" \
  -H "Content-Type: multipart/form-data"
# Output: 2 files uploaded!

See also