On Thu, 27 Feb 2003, Fernando Cassia wrote:

> 1) Can I use libcurl to replace the "file_size" function and query the
> remote file size?. how?

(Please note that I'm not a PHP-dude, I'm talking from a general libcurl
perspective here.)

Yes, probably. If you use a HEAD request to the site with the JPEG, it'll
return headers containing the size of the object.

You make a HEAD request by using the CURLOPT_NOBODY option.

> 2) How can I check if the remote file I'm querying exists (is a jpeg) or
> instead the remote web server forwards me to the providers' 404 page?

Sure. If you attempt to get it, you'll get a set of headers and a 404 code
back if it doesn't exist. I'm not sure how much the PHP binding reflects
this, but using the curl_easy_getinfo() you can get the HTTP code from the
last request, or you can possibly use the CURLOPT_FAILONERROR option. Or
simply parse the returned headers yourself.

> 3) Anyone cares to post a "fake-referer" http-get, first checking if the
> file exists and its size?

Steps:

1. Set CURLOPT_REFERER to a suitable URL
2. do a HEAD
3. If the code is not 404, check the size
4. get the image.

Not that I understand why you need to get the size first. You'll figure out
how big the image is when you get it! ;-)

-- 
 Daniel Stenberg -- curl, cURL, Curl, CURL. Groks URLs.
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