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Groups > comp.lang.php > #17934
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | comp.lang.php |
| Subject | Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? |
| Date | 2019-06-05 21:35 +0200 |
| Organization | PointedEars Software (PES) |
| Message-ID | <5281068.DvuYhMxLoT@PointedEars.de> (permalink) |
| References | <1o3z8vwk6x9am$.54ia46ki18ga$.dlg@40tude.net> |
JJ wrote:
> I'm trying to make a simple proxy script for my web server in my local
> network, but I've found that `curl_exec()` abruptly terminates my script
> without any error or exception on some websites.
^^^^^^^^^^^^^^^^
> FYI, my PHP application came from XAMPP
> (xampp-portable-win32-7.3.2-0-VC15).
>
> Here's the simplified script to reproduce the problem.
>
> <?php
> function doResponseHeaders($cu, $dt) {
> header($dt);
> return strlen($dt);
> }
> $cu = curl_init('https://www.youtube.com/');
> curl_setopt($cu, CURLOPT_HEADERFUNCTION, 'doResponseHeaders');
> try {
> echo 'CURL = ' . curl_exec($cu);
> } catch (Exception $e) {
> echo 'CURL_EXCEPTION';
> }
> curl_close($cu);
> echo 'ALL_DONE';
> ?>
>
> When run, the HTTP 200 is returned, but there is no HTTP body.
At first I thought it would be the usual: YouTube would not take kindly to
being accessed by non-browsers. But:
| $ curl --user-agent 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36
| (KHTML, like Gecko) Chrome/73.0.3683.75 Safari/537.36'
| http://www.youtube.com/
| $
[empty]
The reason why this "does not work" “with some Web sites” is very simple:
| $ HEAD -USe http://www.youtube.com/
| HEAD http://www.youtube.com/
| User-Agent: lwp-request/6.15 libwww-perl/6.15
|
| 301 Moved Permanently
^^^^^^^^^^^^^^^^^^^^^
| Cache-Control: no-cache
| Connection: close
| Date: Wed, 05 Jun 2019 19:20:54 GMT
| Location: https://www.youtube.com/
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| Server: YouTube Frontend Proxy
| Content-Length: 0
| […]
The insecure access is being redirected to the secure Web site, and your
curl_exec() call does not handle that. Without following the redirection,
the HTTP body actually *is* empty.
> I did found out that the problem doesn't occur if I don't let the
> `Transfer-Encoding` HTTP response header be processed by `header()`.
> However, the main problem is the fact that `curl_exec()` terminates the
> script abruptly without any exception.
> And **any** code after `curl_exec()` is not executed.
Unlikely.
> So, how to handle this kind of error so that it won't terminate the
> script?
You can set CURLOPT_FOLLOWLOCATION to TRUE (and fine-tune e.g. with
CURLOPT_MAXREDIRS), and you should probably do that (so that it works even
if YouTube etc. changes their mind again; but the simplest solution is to
use 'https://www.youtube.com/' etc. in the first place.
Next time, look at the response status code first.
<https://php.net/curl>
Your From is borked.
--
PointedEars
Zend Certified PHP Engineer <http://www.zend.com/en/yellow-pages/ZEND024953>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.
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How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-05 10:45 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? "J.O. Aho" <user@example.net> - 2019-06-05 06:54 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-06 18:55 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-06 18:52 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-07 19:10 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-07 15:26 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-08 13:15 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-08 13:35 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-08 11:58 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-09 08:46 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-09 22:10 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-09 22:13 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-10 20:42 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-11 13:15 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-12 05:51 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-12 10:37 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-12 22:11 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-11 18:24 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-08 13:20 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-09 09:08 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Jerry Stuckle <jstucklex@attglobal.net> - 2019-06-09 22:12 -0400
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-11 18:05 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-11 20:19 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-08 13:19 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-08 13:37 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-09 09:41 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-10 20:32 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-10 16:34 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-10 16:38 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-10 16:57 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-11 12:42 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-11 08:18 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-12 05:51 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-06-05 21:35 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Arno Welzel <usenet@arnowelzel.de> - 2019-06-12 08:54 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-12 18:07 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-12 21:51 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Arno Welzel <usenet@arnowelzel.de> - 2019-06-12 17:12 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? JJ <jj4public@vfemail.net> - 2019-06-13 00:12 +0700
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Arno Welzel <usenet@arnowelzel.de> - 2019-06-12 16:59 +0200
Re: How to handle curl_exec() so that it won't terminat my script abruptly without any exception? Luuk <luuk@invalid.lan> - 2019-06-12 22:25 +0200
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