Please excuse me if this an elementary question as I've just begun using

libcurl. I've read all the documentation and example programs that I
can find

and have not been able to get my program to work as I'd like.

Basically I'd like to poll a web server to see if a file has been
updated

since the last time I downloaded it. I'm trying to use the
"CURLOPT_FILETIME"

function for this and cannot get it to work.

I'm using libcurl.so.3.0.0 on a RedHat 5.0.0 system.

Here's my test program:

    int main(int argc, char **argv)

    {

      CURL *curl_handle;

      time_t fileTime = 1;

      curl_global_init(CURL_GLOBAL_ALL);

      curl_handle = curl_easy_init();

      curl_easy_setopt(curl_handle, CURLOPT_URL, "http://curl.haxx.se"
);

      curl_easy_setopt(curl_handle, CURLOPT_NOBODY, 1 );

      curl_easy_setopt(curl_handle, CURLOPT_FILETIME, &fileTime );

      curl_easy_perform(curl_handle);

      printf ( "Got file time %d - %s\n", fileTime, ctime(&fileTime));

      curl_easy_cleanup(curl_handle);

      return 0;

    }

No matter what I do, it does not appear to update my fileTime variable.
I

always get:

    % curlTest

    Got file time 1 - Wed Dec 31 16:00:01 1969

I've checked the return status on all of the calls (omitted here for
clarity)

and none of the functions are returning any errors. I've also tried it
on a

variety of web servers including our own in-house server and they all
behave

the same way.

When I download the header and body of one of these locations the header

looks something like:

    HTTP/1.1 200 OK

    Date: Mon, 12 Nov 2007 21:38:10 GMT

    Server: Apache/2.2.4 (Unix) mod_ssl/2.2.4 OpenSSL/0.9.8b

    Last-Modified: Mon, 12 Nov 2007 21:04:34 GMT

    ETag: "24cec5-24ec5b-ade63c80"

    Accept-Ranges: bytes

    Content-Length: 2419803

    Content-Type: text/plain

which contains a "Last-Modified" date.

What am I doing wrong?

TIA!

Don

 
Received on 2007-11-12