diff --git a/src/mvnfeed_modules/mvnfeed-cli-transfer/mvnfeed/cli/transfer/transfer.py b/src/mvnfeed_modules/mvnfeed-cli-transfer/mvnfeed/cli/transfer/transfer.py
index ec1e301..0fe02ec 100644
--- a/src/mvnfeed_modules/mvnfeed-cli-transfer/mvnfeed/cli/transfer/transfer.py
+++ b/src/mvnfeed_modules/mvnfeed-cli-transfer/mvnfeed/cli/transfer/transfer.py
@@ -2,18 +2,12 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # --------------------------------------------------------------------------------------------
-
+import functools
 import logging
 import os.path
 import requests
 import shutil
 import xml.etree.ElementTree as ET
-try:
-    # Python 3
-    from urllib.request import Request, urlopen
-except ImportError:
-    # Python 2
-    from urllib2 import Request, urlopen
 from .configuration import get_repository, get_stagedir, get_repository_shortname
 from mvnfeed.cli.common.config import AUTHORIZATION, URL, load_config
 
@@ -113,7 +107,7 @@ def _transfer_single_artifact(name, from_repository, to_repository, stage_dir, t
 
         # let's always download POM files in case we need to process the parent POM
         # once again or upload the children dependencies.
-        outfile = os.path.join(stage_dir, file2transfer['name'])
+        outfile = os.path.join(stage_dir, group_id + '-' + file2transfer['name'])
         _download_file(from_repository, artifact_relativepath, outfile)
         if not os.path.exists(outfile):
             logging.info('%s was not downloaded. Skipping', outfile)
@@ -196,12 +190,22 @@ def _java_artifacts(artifact_fullname, artifact_type, artifact_path, transfer_de
             'path': artifact_path,
             'target': True
         },
+        {
+            'name': artifact_fullname + '.jar.sha1',
+            'path': artifact_path,
+            'target': False
+        },
         {
             'name': artifact_fullname + '.pom',
             'path': artifact_path,
             'transfer_deps': transfer_deps,
             'target': False
         },
+        {
+            'name': artifact_fullname + '.pom.sha1',
+            'path': artifact_path,
+            'target': False
+        },
         {
             'name': artifact_fullname + '-tests.jar',
             'path': artifact_path,
@@ -212,6 +216,11 @@ def _java_artifacts(artifact_fullname, artifact_type, artifact_path, transfer_de
             'path': artifact_path,
             'target': False
         },
+        {
+            'name': artifact_fullname + '-sources.jar.sha1',
+            'path': artifact_path,
+            'target': False
+        },
         {
             'name': artifact_fullname + '-javadoc.jar',
             'path': artifact_path,
@@ -233,6 +242,11 @@ def _untyped_artifacts(artifact_fullname, artifact_type, artifact_path, transfer
             'path': artifact_path,
             'transfer_deps': transfer_deps,
             'target': False
+        },
+        {
+            'name': artifact_fullname + '.pom.sha1',
+            'path': artifact_path,
+            'target': False
         }
     ]
 
@@ -244,7 +258,7 @@ def _findNodeValue(node, name):
     return foundNode.text
 
 
-def _download_file(from_repository, path, filename, length=16*1024):
+def _download_file(from_repository, path, filename):
     """
     Stores the path into the given filename.
     """
@@ -256,20 +270,23 @@ def _download_file(from_repository, path, filename, length=16*1024):
 
     url = _append_url(from_repository[URL], path)
     logging.debug('downloading from %s', url)
-    try:
-        request = Request(url)
-        if AUTHORIZATION in from_repository and from_repository[AUTHORIZATION]:
-            logging.debug('authorization header added')
-            request.add_header('Authorization', from_repository[AUTHORIZATION])
-        else:
-            logging.debug('no authorization configured')
+    if AUTHORIZATION in from_repository and from_repository[AUTHORIZATION]:
+        logging.debug('authorization header added')
+        headers = {'Authorization': from_repository[AUTHORIZATION]}
+    else:
+        logging.debug('no authorization configured')
+        headers = {}
 
-        response = urlopen(request)
-        with open(filename, 'wb') as file:
-            shutil.copyfileobj(response, file, length)
+    try:
+        with requests.get(url, headers=headers, stream=True) as response:
+            if not response.ok:
+                logging.debug('exception while downloading (expected): %s', response.text)
+                return
+            response.raw.read = functools.partial(response.raw.read, decode_content=True)
+            with open(filename, 'wb') as file:
+                shutil.copyfileobj(response.raw, file)
     except Exception as ex:
-        logging.debug('exception while downloading (expected): %s', ex)
-        None
+        logging.error('exception while downloading: %s', ex)
 
 
 def _already_uploaded(to_repository, path):
@@ -319,7 +336,7 @@ def _upload_file(to_repository, path, filename):
 
     try:
         with open(filename, 'rb') as file:
-            response = requests.put(url, files={filename: file}, headers=headers)
+            response = requests.put(url, data=file.read(), headers=headers)
             if not response.ok:
                 logging.error('error while uploading of %s: %s', path, response.text)
         return True