--- a/Plugin/Plugin.cpp	Fri Jun 07 16:03:50 2019 +0200
+++ b/Plugin/Plugin.cpp	Fri Jun 07 17:18:27 2019 +0200
@@ -231,6 +231,13 @@
                                   const std::map<std::string, std::string>& headers)
   {
     printf("new handler: [%s] [%s]\n", contentType.c_str(), subType.c_str());
+
+    for (std::map<std::string, std::string>::const_iterator
+           it = headers.begin(); it != headers.end(); ++it)
+    {
+      printf("  header: [%s] = [%s]\n", it->first.c_str(), it->second.c_str());
+    }
+
     return new Handler(count_++);
   }
 };

--- a/Resources/Samples/Python/SendStow.py	Fri Jun 07 16:03:50 2019 +0200
+++ b/Resources/Samples/Python/SendStow.py	Fri Jun 07 17:18:27 2019 +0200
@@ -58,11 +58,31 @@
 # Closing boundary
 body += bytearray('--%s--' % boundary, 'ascii')
 
-# Do the HTTP POST request to the STOW-RS server
-r = requests.post(URL, data=body, headers= {
+headers = {
     'Content-Type' : 'multipart/related; type=application/dicom; boundary=%s' % boundary,
     'Accept' : 'application/json',
-})
+    }
+
+# Do the HTTP POST request to the STOW-RS server
+if False:
+    # Don't use chunked transfer (this code was in use in DICOMweb plugin <= 0.6)
+    r = requests.post(URL, data=body, headers=headers)
+else:
+    # Use chunked transfer
+    # https://2.python-requests.org/en/master/user/advanced/#chunk-encoded-requests
+    def gen():
+        chunkSize = 1024 * 1024
+
+        l = len(body) / chunkSize
+        for i in range(l):
+            pos = i * chunkSize
+            yield body[pos : pos + chunkSize]
+
+        if len(body) % chunkSize != 0:
+            yield body[l * chunkSize :]
+
+    r = requests.post(URL, data=gen(), headers=headers)
+
 
 j = json.loads(r.text)