API drop file upload.

internal/api/room/drop.go

@@ -1,23 +1,77 @@
 package room
 
 import (
+	"os"
+	"io"
+	"io/ioutil"
+	"path"
+	"strconv"
 	"net/http"
 
 	"demodesk/neko/internal/utils"
 )
 
-type DropPayload struct {
-	X     int      `json:"x"`
-	Y     int      `json:"y"`
-	Files []string `json:"files"`
-}
+const (
+	// Maximum upload of 32 MB files.
+	MAX_UPLOAD_SIZE = 32 << 20
+)
 
 func (h *RoomHandler) dropFiles(w http.ResponseWriter, r *http.Request) {
-	data := &DropPayload{}
-	if !utils.HttpJsonRequest(w, r, data) {
+	r.ParseMultipartForm(MAX_UPLOAD_SIZE)
+
+	X, err := strconv.Atoi(r.FormValue("x"))
+	if err != nil {
+		utils.HttpBadRequest(w, err)
 		return
 	}
 
-	h.desktop.DropFiles(data.X, data.Y, data.Files)
+	Y, err := strconv.Atoi(r.FormValue("y"))
+	if err != nil {
+		utils.HttpBadRequest(w, err)
+		return
+	}
+
+	req_files := r.MultipartForm.File["files"]
+	if len(req_files) == 0 {
+		utils.HttpBadRequest(w, "No file received.")
+		return
+	}
+
+	dir, err := ioutil.TempDir("", "neko-drop-*")
+	if err != nil {
+		utils.HttpInternalServerError(w, err)
+		return
+	}
+
+	files := []string{}
+	for _, req_file := range req_files {
+		path := path.Join(dir, req_file.Filename)
+
+		srcFile, err := req_file.Open()
+		if err != nil {
+			utils.HttpInternalServerError(w, err)
+			return
+		}
+
+		defer srcFile.Close()
+
+		dstFile, err := os.OpenFile(path, os.O_APPEND | os.O_CREATE | os.O_WRONLY, 0644)
+		if err != nil {
+			utils.HttpInternalServerError(w, err)
+			return
+		}
+
+		defer dstFile.Close()
+
+		_, err = io.Copy(dstFile, srcFile)
+		if err != nil {
+			utils.HttpInternalServerError(w, err)
+			return
+		}
+
+		files = append(files, path)
+	}
+
+	h.desktop.DropFiles(X, Y, files)
 	utils.HttpSuccess(w)
 }