asked on 3/2/2007

Query a web site from a windows program written in C

I need to add functionality to a windows program written in C (no MFC). This program should be able to access and get information from a certain web site. This web site is for the registered users, who could login and download program updates. Right now I just want the windows program to query the site’s database and determine, if the specified user name belongs to a registered user.

Microsoft Development C

Last Comment

Infinity08

3/8/2007

ASKER CERTIFIED SOLUTION

Infinity08

3/2/2007

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freylicher

3/2/2007

ASKER

Thank you, Infinity08.

I shall check this library. Did you use it in your C programs? Will it work with password protected site?

Thanks again,

-alex

Infinity08

3/3/2007

Yes, I have used it myself, and yes, it does support HTTPS.

Take a look at basic this example :

http://curl.haxx.se/lxr/source/docs/examples/https.c

You'll find a lot more examples and documentation on the site.

freylicher

3/3/2007

ASKER

Well, this is not https site. I meant that the users have to login like in experts-exchange site.

Infinity08

3/3/2007

That's usually done using forms, so you can simply use the form functionality in libcurl. Here's an example that should get you on the right track. It doesn't log in, but it uploads a file through a form :

http://curl.haxx.se/lxr/source/docs/examples/postit2.c

The principle is the same though. Instead of sendfile and filename, you'll have login and password.

Basically, you'll have to look for the definition of the login form (look at the HTML source of the web page you want to login to), and fill in all parameters using curl_formadd, and then send it.

freylicher

3/7/2007

ASKER

Infinity08,

I did not have a chance to try the library yet, but you answered my question and 500 points are yours.
I may have more questions when I start working on this problem. If you are interested to do some consulting for me, please send me a message to 2006 at www.freylicher.com

Thanks again,
-alex

Infinity08

3/8/2007

Glad I could be of assistance. I'll be glad to answer any further questions (if I have the answer :)).

freylicher

3/8/2007

ASKER

<<I'll be glad to answer any further questions>>

After I award the points I am not sure we shall be able to communicate in this thread. That's why I wanted to establish email connection. I should really appreciate getting email from you.

Thank you,
-alex

Infinity08

3/8/2007

>> After I award the points I am not sure we shall be able to communicate in this thread.
This thread will still be open after you accept an answer. I'll still receive a notification when you post a follow-up question, and I will respond over here.