diff --git a/app.py b/app.py
index 39ebb56..740118c 100755
--- a/app.py
+++ b/app.py
@@ -208,24 +208,52 @@ def get_upload_candidate_list(host_local, port, media_list):
             print("Response not ok !")
         return []
 
+def read_in_chunks(file_object, chunk_size=102400):
+    while True:
+        data = file_object.read(chunk_size)
+        if not data:
+            break
+        yield data
 
 def HTTP_upload(file_dict, host_local, port):
     '''
     Build HTTP file upload request and send it.
+    https://stackoverflow.com/questions/43383823/python-flask-chunk-data-upload-not-working/70894476#70894476
     '''
-    url = "https://" + host_local + ":" + str(port) + "/upload"
+    global current_upload
     http_headers_data_mime = http_headers.copy()
     http_headers_data_mime["content-type"] = ""
-    files = {"file": (file_dict["filename"], open(media_folder_local + file_dict["filename"], "rb"), "multipart/form-data")}
-    if debug:
-        print(files)
-    response = requests.post(url, files=files, headers=http_headers, verify=CAfile)
-    if debug:
-        print(response.text)
-    if response.ok:
-        return 1
-    else:
-        return 0
+    file_path = os.path.join(media_folder_local, file_dict["filename"])
+    part_size = int(file_dict["size"] / 10)
+    if part_size < 102400:
+        part_size = 102400
+    url = "https://" + host_local + ":" + str(port) + "/upload/" + file_dict["filename"] + "/" + str(part_size)
+    with open(file_path, "rb") as ul_file:
+        try:
+            for data in read_in_chunks(ul_file, chunk_size=part_size):
+                print(len(data))
+                # ~ files = {"file": (file_dict["filename"], data, "multipart/form-data")}
+                # ~ files = {"file": (file_dict["filename"], "multipart/form-data")}
+                # ~ response = requests.post(url, files=files, headers=http_headers, verify=CAfile)
+                response = requests.post(url, data=data, headers=http_headers, verify=CAfile)
+                # ~ response = requests.post(url, data=data, headers=http_headers, verify=CAfile)
+                if debug:
+                    print(response.text)
+                transferred_mb = len(data) / 1024 / 1024
+                current_upload["transferred_size"] += round(transferred_mb)
+                current_upload["transferred_percent"] += round(100 / current_upload["total_size"] * transferred_mb)
+        except Exception as e:
+            print(e)
+    # ~ files = {"file": (file_dict["filename"], open(media_folder_local + file_dict["filename"], "rb"), "multipart/form-data")}
+    # ~ if debug:
+        # ~ print(files)
+    # ~ response = requests.post(url, files=files, headers=http_headers, verify=CAfile)
+    # ~ if debug:
+        # ~ print(response.text)
+    # ~ if response.ok:
+        # ~ return 1
+    # ~ else:
+        # ~ return 0
 
 
 def list_media_files(folder):
@@ -315,8 +343,8 @@ def sync_media_folder(media_folder_local, media_folder_remote, host_local, port,
                         if debug:
                             print("File size: " + str(round(current_media_size)))
                         media_count += 1
-                        current_upload["transferred_size"] += round(current_media_size)
-                        current_upload["transferred_percent"] += round((100 / total_size) * current_media_size)
+                        # ~ current_upload["transferred_size"] += round(current_media_size)
+                        # ~ current_upload["transferred_percent"] += round((100 / total_size) * current_media_size)
                 else:
                     # Upload interrupted
                     return _("Upload interrupted")
@@ -502,7 +530,7 @@ def send_pilpil_command(host, arg0, arg1, arg2):
                 HTTP_request = HTTP_request + "&val=" + arg1
             elif (arg0 == "enqueue") or (arg0 == "add"):
                 # Add 'input' url parameter
-                HTTP_request = HTTP_request + "&input=file://" + quote(media_folder_remote_expanded) + "/" + arg1
+                HTTP_request = HTTP_request + "&input=file://" + os.path.join(quote(media_folder_remote_expanded),arg1)
 
     # Send request and get data response
     data = send_HTTP_request(host, port_, time_out=3, request_=HTTP_request)
diff --git a/changelog_todo.md b/changelog_todo.md
index 0c0ad74..d1b41d0 100644
--- a/changelog_todo.md
+++ b/changelog_todo.md
@@ -70,11 +70,13 @@ sha256 : 401359a84c6d60902c05602bd52fae70f0b2ecac36d550b52d14e1e3230854a6
   
 
 # DOING NEXT :
- 
+  * server : remove incomplete files before upload
   * webgui/server : interrupt current download ?
+  * webgui : upload status CSS transition ?
  
 #  DONE :
 
+  * server : upload in chunks
   * webgui: remove file from timeline (drag&drop to bin?) (check bugs)
   * webgui: upload progress dialog
   * server : file upload : only send new files, get upload status (/sync/status)