[libmicrohttpd] Parsing multipart/formdata

[Markus Doppelbauer]

Hello,

Is there a reliable way to detect 'continution' in
'MHD_PostDataIterator()'?
To detect the beginning of a new variable I have tested: 'off == 0'.
But this is not reliable. It is a rare case but sometimes the iterator
stops right
before the first content-byte (if helpful I will provide a testcase):

first call:
MHD_PostDataIterator( cls, kind=MHD_POSTDATA_KIND, key="upload-name",
          filename="video.mp4", content_type="video/mp4",
transfer_encoding=nullptr,
          data=..., off=0, size=0 );

second call:
MHD_PostDataIterator( cls, kind=MHD_POSTDATA_KIND, key="upload-name",
          filename="video.mp4", content_type="video/mp4",
transfer_encoding=nullptr,
          data=..., off=0, size=64724 );

Pointer comparision of 'key', 'filename' and 'content_type' works - but
is also not 100% reliable.
'malloc()' could provide the same address.

Thanks a lot
Markus