[libmicrohttpd] Digest authentication: Stale nonce received

[Mario Valle]

Dear all,

I just started playing with MHD. With a few contortions, I'm able to use 
it on Windows. Very good! Thanks.

My final goal is to embed a server in my application with a modicum of 
authentication and very few requests per day :-)
So I opted for Digest authentication.
I started from digest_auth_example.c and added code to serve my html 
files and images (ie transplanting the example from the tutorial section 4).

The problem is that the browser (Chrome) is asking for username and 
password apparently for each loaded image of the page. Adding few printf 
to the digest_auth_example.c code gives:

> server.exe 8899
Before MHD_digest_auth_check
After MHD_digest_auth_check ret: 0
/// Perfect, the first time it asks for user/passwd
Before MHD_digest_auth_check
After MHD_digest_auth_check ret: 1
Continuing and loading url:  </index.html>
/// Perfect, it load the page.
/// Now the request for the first image on the page
Before MHD_digest_auth_check
Stale nonce received.  If this happens a lot, you should probably 
increase the size of the nonce array.
After MHD_digest_auth_check ret: 0
/// Now the browser asks again for user/passwd. So I push cancel on the form

Well, I have increased the value of MHD_OPTION_NONCE_NC_SIZE from 300 to 
50000 and nothing change, so seems the message is a red herring.

I'm deeply ignorant in these auth thingies, so I don't know if I blindly 
used the example that works for a single request or there is something 
more profound I'm missing.
All your help is highly appreciated. Thanks!
                                                        mario
--
Ing. Mario Valle
Swiss National Supercomputing Centre (CSCS)
v. Trevano 131, 6900 Lugano, Switzerland
Tel: +41 (91) 610.82.60