[libmicrohttpd] POST file content without the form method

[alexander . hetzl]

Hi,

I've used the largepost.c example and implemented the upload. When I perform a 
test using cUrl, everything works fine.

curl -F "payload=<remove.xml" http://username:password@localhost:9090

However requirements changed and I need to change the logic from using the form 
post to posting the file content directly without having a "key". Doing this in 
cUrl looks like:

curl -d "@remove.xml" http://username:password@localhost:9090

Assume the signature of my iteratePost looks like this:

static int iteratePost(void *conInfoCls,
                       enum MHD_ValueKind kind,
                       const char *key,
                       const char *filename,
                       const char *content_type,
                       const char *transfer_encoding,
                       const char *data,
                       uint64_t off,
                       size_t size);

When i post the file content directly, some part of the files content is in the 
key and some in the data variables. It would be possible to handle this; 
however, if have a "=" character in the first section of the file, it seems 
that libmicrohttpd is removing it. So lets assume the file remove.xml has the 
following line at the beginning:

<?xml version="1.0" encoding="ISO-8859-1"?>

What is receive in the iteratePost is:
<?xml version"1.0" encoding="ISO-8859-1"?>

Hence, the content is invalid.

Is there a way in the library to handle this case?

Best Regards,
Alex