[libmicrohttpd] How to determine the file size for an upload and how to read complete query string

[Dirk Brinkmeier]

Hi.

I'm very excited in using libmicrohttpd.
It has helped me a lot to develop a web server enabled application!

But I have 2 questions:

The first is regarding the complete size of a POSTed upload (e.g. file 
upload).
Currently I'm using the value delivered by:

MHD_lookup_connection_value(connection, MHD_HEADER_KIND, 
MHD_HTTP_HEADER_CONTENT_LENGTH)

But this value always seems to be higher than the actual data that is sent.
Or in other words it is higher than the file size to be uploaded.
So I wait for *upload_data_size to be empty an then I assume that the 
POST upload is finished.
But I can't verify the uploaded file size to the real file size.

Is the any chance to estimate the correct file size for an upload?


The second question belongs to requests that contains query data.
For example: 
https://localhost:8099/json/T_Personal.json?order=asc&limit=10&offset=0&_=1436290313274

I'm reading each parameter by calling MHD_lookup_connection_value:
MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "order");
MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "offset");
MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "limit");
MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "search");
MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "_");

This has the disadvantage that I always have to know the parameters that 
I expect.
Is there a way to get the complete query string (for parsing it 
afterwards in my application)?
In the example above "order=asc&limit=10&offset=0&_=1436290313274"


Hope you can give me some hints...
I also hope that I don't have missed some basic chapters in the 
documentation ;-)

Thanks a lot in advance,
Dirk.