initial import

internal/handler/handler.go

@@ -0,0 +1,56 @@
+package handler
+
+import (
+	"net/http"
+	"os"
+	"path/filepath"
+        "strings"
+
+	"filer/pkg/logger"
+
+	"github.com/gin-gonic/gin"
+)
+
+type HandlerConfig struct {
+	Datadir string
+}
+
+type Handler struct {
+	log     *logger.Logger
+	datadir string
+}
+
+func NewHandler(conf *HandlerConfig) (*Handler, error) {
+	var err error
+	hand := &Handler{
+		log: logger.NewLogger("handler"),
+	}
+	return hand, err
+}
+
+func (hand *Handler) GetFile(gctx *gin.Context) {
+	filePath := gctx.FullPath()
+	localFilePath := filepath.Join(hand.datadir, filePath)
+
+	if strings.Contains(localFilePath, "/../") {
+		gctx.Status(http.StatusBadRequest)
+                return
+	}
+	if len(filePath) > 0 && fileExists(localFilePath) {
+		gctx.FileAttachment(localFilePath, filepath.Base(filePath))
+		return
+	} else {
+		gctx.Status(http.StatusNotFound)
+		return
+	}
+}
+
+func fileExists(name string) bool {
+	fi, err := os.Stat(name)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+	}
+	return !fi.IsDir()
+}