ok almost finished. We're good at deadlines eventually. Tomorrow at 23:59 an article will be published same time with the dev branch merge to master

Former-commit-id: 42c1bf88cedbddf3cc01366ab769139546902e71

_examples/http_request/upload-files/main.go

@@ -4,8 +4,9 @@ import (
 	"crypto/md5"
 	"fmt"
 	"io"
-	"os"
+	"mime/multipart"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/kataras/iris"
@@ -26,46 +27,39 @@ func main() {
 		token := fmt.Sprintf("%x", h.Sum(nil))
 
 		// render the form with the token for any use you'd like.
-		ctx.ViewData("", token)
-		ctx.View("upload_form.html")
+		ctx.View("upload_form.html", token)
 	})
 
-	// Handle the post request from the upload_form.html to the server
+	// Handle the post request from the upload_form.html to the server.
 	app.Post("/upload", func(ctx iris.Context) {
-		// iris.LimitRequestBodySize(32 <<20) as middleware to a route
-		// or use ctx.SetMaxRequestBodySize(32 << 20)
-		// to limit the whole request body size,
 		//
-		// or let the configuration option at app.Run for global setting
-		// for POST/PUT methods, including uploads of course.
+		// UploadFormFiles
+		// uploads any number of incoming files (multiple property on the form input).
+		//
 
-		// Get the file from the request.
-		file, info, err := ctx.FormFile("uploadfile")
-
-		if err != nil {
-			ctx.StatusCode(iris.StatusInternalServerError)
-			ctx.HTML("Error while uploading: <b>" + err.Error() + "</b>")
-			return
-		}
-
-		defer file.Close()
-		fname := info.Filename
-
-		// Create a file with the same name
-		// assuming that you have a folder named 'uploads'
-		out, err := os.OpenFile("./uploads/"+fname,
-			os.O_WRONLY|os.O_CREATE, 0666)
-
-		if err != nil {
-			ctx.StatusCode(iris.StatusInternalServerError)
-			ctx.HTML("Error while uploading: <b>" + err.Error() + "</b>")
-			return
-		}
-		defer out.Close()
-
-		io.Copy(out, file)
+		// second argument is totally optionally,
+		// it can be used to change a file's name based on the request,
+		// at this example we will showcase how to use it
+		// by prefixing the uploaded file with the current user's ip.
+		ctx.UploadFormFiles("./uploads", beforeSave)
 	})
 
 	// start the server at http://localhost:8080 with post limit at 32 MB.
 	app.Run(iris.Addr(":8080"), iris.WithPostMaxMemory(32<<20))
 }
+
+func beforeSave(ctx iris.Context, file *multipart.FileHeader) {
+	ip := ctx.RemoteAddr()
+	// make sure you format the ip in a way
+	// that can be used for a file name (simple case):
+	ip = strings.Replace(ip, ".", "_", -1)
+	ip = strings.Replace(ip, ":", "_", -1)
+
+	// you can use the time.Now, to prefix or suffix the files
+	// based on the current time as well, as an exercise.
+	// i.e unixTime :=	time.Now().Unix()
+	// prefix the Filename with the $IP-
+	// no need for more actions, internal uploader will use this
+	// name to save the file into the "./uploads" folder.
+	file.Filename = ip + "-" + file.Filename
+}