* check target path at upload

src/httpcli/httpcli.go

@@ -234,15 +234,54 @@ func Upload(node *nodetree.NodeLoc) (def.ErrCode, error) {
 	return def.SUCCESS, nil
 }
 
-func PathExists(path string) (bool, error) {
+func RemotPathExists(path string) (def.ErrCode, error) {
+	url := "http://"
+	url += host
+	url += ":"
+	url += strconv.Itoa(port)
+	url += "/front/data/query_list?pages=1&pagesize=10&prefix="
+	url += path
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		log.Println(err)
+		return def.ERR_HTTP_REQUEST, err
+	}
+	req.Header.Add("token", auth.GetToken())
+
+	var resp *http.Response
+	resp, err = http.DefaultClient.Do(req)
+	if err != nil {
+		log.Println(err)
+		return def.ERR_HTTP_REQUEST, err
+	}
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		log.Println(err)
+		return def.ERR_UNKNOWN, err
+	}
+
+	var dl SvrResp
+	json.Unmarshal(body, &dl)
+
+	if dl.Msg != "OK" {
+		return def.ERR_PATH_NOT_EXISTED, nil
+	}
+
+	return def.SUCCESS, nil
+
+}
+
+func PathExists(path string) (def.ErrCode, error) {
 	_, err := os.Stat(path)
 	if err == nil {
-		return true, nil
+		return def.SUCCESS, nil
 	}
 	if os.IsNotExist(err) {
-		return false, nil
+		return def.ERR_PATH_NOT_EXISTED, nil
 	}
-	return false, err
+	return def.ERR_PATH_NOT_EXISTED, nil
 }
 
 func MkdirLoc(path string) (def.ErrCode, error) {
@@ -262,7 +301,7 @@ func MkdirLoc(path string) (def.ErrCode, error) {
 			return def.ERR_PATH_HAS_EXISTED, err
 		}
 
-		if !exist {
+		if exist == def.ERR_PATH_NOT_EXISTED {
 			err = os.Mkdir(strDir, 0775)
 			if err != nil {
 				log.Println(err)

src/main.go

@@ -124,6 +124,14 @@ func main() {
 
 	if nodetree.StrOp == "upload" {
 		nodetree.StrDst = "data" + nodetree.StrDst
+		remot_dst, err := httpcli.RemotPathExists(nodetree.StrDst)
+		if err != nil {
+			return
+		}
+		if remot_dst == def.ERR_PATH_NOT_EXISTED {
+			fmt.Printf("target path not exist on server\n")
+			return
+		}
 
 		tmpstr := nodetree.StrSrc[:len(nodetree.StrSrc)-1]
 		idx := strings.LastIndex(tmpstr, "/")