taoge:~/test_gin$ tree
.
|-- public
|-- template
|  `-- select_file.html
`-- test_gin_server.go
2 directories, 2 files
taoge:~/test_gin$ 

package main
import (
  "fmt"
  "io"
  "log"
  "net/http"
  "os"
  "github.com/gin-gonic/gin"
)
func upload(c *gin.Context) {
  file, header, err := c.Request.FormFile("file") 
  if err != nil {
    c.String(http.StatusBadRequest, fmt.Sprintf("file err : %s", err.Error()))
    return
  }
  filename := header.Filename
  out, err := os.Create("public/" + filename)
  if err != nil {
    log.Fatal(err)
  }
  defer out.Close()
  _, err = io.Copy(out, file)
  if err != nil {
    log.Fatal(err)
  }
  filepath := "http://localhost:8080/file/" + filename
  c.JSON(http.StatusOK, gin.H{"filepath": filepath})
}
func main() {
  router := gin.Default()
  router.LoadHTMLGlob("template/*")
  router.GET("/", func(c *gin.Context) {
    c.HTML(http.StatusOK, "select_file.html", gin.H{})
  })
  router.POST("/upload", upload)
  router.StaticFS("/file", http.Dir("public"))
  router.Run(":8080")
}

html>
body>
  form action="http://localhost:8080/upload/" enctype="multipart/form-data" method="POST"> 
    input type="file" name="file" id="pic" accept="*" />
    button type="submit">提交/button>
  /form>
/body>
/html>