add error handling when non-multipart request comes in

git-svn-id: https://weed-fs.googlecode.com/svn/trunk@49 282b0af5-e82d-9cf1-ede4-77906d7719d0

weed-fs/src/cmd/weedvolume/weedvolume.go

@@ -72,12 +72,17 @@ func PostHandler(w http.ResponseWriter, r *http.Request) {
 	if e != nil {
 		writeJson(w, r, e)
 	} else {
-		ret := store.Write(volumeId, storage.NewNeedle(r))
+	  needle, ne := storage.NewNeedle(r)
+	  if ne!=nil{
+	    writeJson(w, r, ne)
+	  }else{
+	    ret := store.Write(volumeId, needle)
 	    m := make(map[string]uint32)
 	    m["size"] = ret
 	    writeJson(w, r, m)
 	  }
 	}
+}
 func DeleteHandler(w http.ResponseWriter, r *http.Request) {
 	n := new(storage.Needle)
 	vid, fid, _ := parseURLPath(r.URL.Path)

weed-fs/src/pkg/storage/needle.go

@@ -20,12 +20,14 @@ type Needle struct {
 	Padding  []byte "Aligned to 8 bytes"
 }
 
-func NewNeedle(r *http.Request) (n *Needle) {
+func NewNeedle(r *http.Request) (n *Needle, e error) {
 
 	n = new(Needle)
 	form, fe := r.MultipartReader()
 	if fe != nil {
-		log.Fatalf("MultipartReader [ERROR] %s\n", fe)
+		log.Printf("MultipartReader [ERROR] %s\n", fe)
+		e = fe
+		return
 	}
 	part, _ := form.NextPart()
 	data, _ := ioutil.ReadAll(part)