CURL cannot connect to URL - IP address - after successful connection
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From: "Tommy Pham" on 28 Apr 2010 19:45 > -----Original Message----- > From: ioannes(a)btinternet.com [mailto:ioannes(a)btinternet.com] > Sent: Wednesday, April 28, 2010 7:03 AM > To: 'PHP' > Subject: Re: [PHP] CURL cannot connect to URL - IP address - after successful > connection > > I think the answer is: ISPs have a different range of addresses from host > providers, so it is possible to block requests from host servers, so from > scripts. > > John > That's possible but very unlikely in your case. Since you were to able to get the necessary information on the 1st request, but failed on subsequent means it has an anti-bot mechanism in place. Bypassing anti-bot requires in-depth reverse-engineering of the targeted site. Regards, Tommy
From: "Gary ." on 29 Apr 2010 06:46 On 4/25/10, ioannes(a)btinternet.com wrote: > I can return a target page - once, but then on refresh within a few > hours the script curl_error is that it cannot connect to the host and > return is empty. Failed to connect to host is a pretty strange error if they're doing anything regarding cookies and so on, IMO - I think I'd expect at least a connection to be established before they decide they don't like you. Have you used curl's --trace & --trace-ascii options?
From: "Gary ." on 29 Apr 2010 13:28 On 4/29/10, ioannes(a)btinternet.com wrote: > On 2010/04/29 19:46, Gary . wrote: >> Failed to connect to host is a pretty strange error if they're doing >> anything regarding cookies and so on, IMO - I think I'd expect at >> least a connection to be established before they decide they don't >> like you. Have you used curl's --trace& --trace-ascii options? > > Is that debug_backtrace() in php Not sure :-P > as I am not using the command line > (can't work out how to get the window up having downloaded curl, I am > not up to 'building libraries' that seems to be needed). Windows? http://curl.haxx.se/download.html *n*x variants should allow installing via their packge management systems.
From: Pete Ford on 30 Apr 2010 04:02
On 25/04/10 14:17, ioannes(a)btinternet.com wrote: > I can return a target page - once, but then on refresh within a few > hours the script curl_error is that it cannot connect to the host and > return is empty. The target URL is an ip address, not a named url, so > maybe it has something to do with DNS. I am on a shared server. Any > ideas on why this happens? > > John I've been watching this thread for a few days, and seen the various responses. It seems to me you should be asking the provider of the target page what the problem is! If you are consuming this service legitimately then they will tell you, and possibly provide a workaround. If not, then you probably shouldn't be doing what you are trying to do anyway - there a reason why they are blocking bots... Cheers Pete |