Re: Header problem - SOLVED

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This has been solved today. Talawa had a similar problem and came up with a solution to his problem, namely using session_write_close() before creating the headers. That stunt also solved my problem :-) 

--
Kind regards
Kim Emax

Kim Madsen wrote on 2009-10-03 13:30:

Hi PHP people

I have a really strange and annoying problem. I've got a site, where
members can download music. User clicks index.php (in index.php
there's an iframe, that opens another file), if certain check are okay
then a popup window opens download.php, where a mp3 file is fetched
from the server and renamed in the header, then pushed to the enduser,
this works fine. But now I want to create zipfiles too but when a user
downloads a zipfile it's like the whole site is freezed until download
has completed. My guess is that this is some sort of header problem
(see headers below), due to three headers at the same time, cause the
class works as expected in the test page i've created. Inputs to
correct headers would be appriciated very much :-)

Mp3 headers:
 $new_filename = "attachment; filename=\"{$artist} - {$title}.mp3\"";
 header('Content-Description: File Transfer');
 header("Content-Type: application/octet-stream");
 header("Content-Length: $size");
 header("Content-Disposition: $new_filename");
 header("Content-Transfer-Encoding: binary");
 readfile($source_file);

Zip headers:
 $zip = new zipfile();
 $zip->add_dir(".");
 $new_filename= "{$artist} - {$title}.mp3";
 if(mysql_num_rows($result)) {
   $zip->add_file($file, $new_filename);
 }
 header("Pragma: public");
 header("Expires: 0");
 header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
 header("Cache-Control: private",false);
 header("Content-type: application/zip");
 #header("Content-Type: application/octet-stream");
 header("Content-disposition: attachment; filename=\"zipTest.zip\"");
 header('Content-Transfer-Encoding: binary');
 ob_end_clean();
 echo $zip->file();

Code example: http://lps.netlinq.dk/test010/test_zip.class.php

Headers (fetched with firefox add-on: live http headers)

This is headers from the site, where the problem occurs:

1. click on the link to a title (Maxwell in this case)
----------------------------------------------------------
http://lps.netlinq.dk/?action=download&track_id=357

GET /?action=download&track_id=357 HTTP/1.1
Host: lps.netlinq.dk
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/
20090803 Ubuntu/9.04 (jaunty) Shiretoko/3.5.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://lps.netlinq.dk/?action=download&track_id=350
Cookie: login_email=kim%40emax.dk;
PHPSESSID=fbb5d6adec802766cf6f638c99ab4f1d

HTTP/1.x 200 OK
Date: Fri, 02 Oct 2009 15:15:21 GMT
Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.6 with Suhosin-Patch
mod_ruby/1.2.6 Ruby/1.8.6(2007-09-24) mod_ssl/2.2.8 OpenSSL/0.9.8g
X-Powered-By: PHP/5.2.4-2ubuntu5.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-
check=0
Pragma: no-cache
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 4250
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: text/html

2. I click on "download zip" (this is a link to index.php)
if conditions are met, then a popup with download.php is activated and
here a zip header is made

----------------------------------------------------------
http://lps.netlinq.dk/index.php

POST /index.php HTTP/1.1
Host: lps.netlinq.dk
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/
20090803 Ubuntu/9.04 (jaunty) Shiretoko/3.5.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://lps.netlinq.dk/?action=download&track_id=357
Cookie: login_email=kim%40emax.dk;
PHPSESSID=fbb5d6adec802766cf6f638c99ab4f1d
Content-Type: application/x-www-form-urlencoded
Content-Length: 131
action=ask_questions&download_zipfile=1&version_id
%5B1065%5D=1&version_id%5B1066%5D=1&version_id%5B1067%5D=1&version_id
%5B1068%5D=1

HTTP/1.x 200 OK
Date: Fri, 02 Oct 2009 15:15:29 GMT
Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.6 with Suhosin-Patch
mod_ruby/1.2.6 Ruby/1.8.6(2007-09-24) mod_ssl/2.2.8 OpenSSL/0.9.8g
X-Powered-By: PHP/5.2.4-2ubuntu5.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-
check=0
Pragma: no-cache
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 3216
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Content-Type: text/html
----------------------------------------------------------
http://lps.netlinq.dk/download.php?track_id=357&member_id=1&string=41e0cd250ca3a40598e2019fd4c813cc&kbit=320&zipfile=1 

GET /download.php?
track_id=357&member_id=1&string=41e0cd250ca3a40598e2019fd4c813cc&kbit=320&zipfile=1 
HTTP/1.1
Host: lps.netlinq.dk
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/
20090803 Ubuntu/9.04 (jaunty) Shiretoko/3.5.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://lps.netlinq.dk/index.php
Cookie: login_email=kim%40emax.dk;
PHPSESSID=fbb5d6adec802766cf6f638c99ab4f1d

HTTP/1.x 200 OK
Date: Fri, 02 Oct 2009 15:15:30 GMT
Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.6 with Suhosin-Patch
mod_ruby/1.2.6 Ruby/1.8.6(2007-09-24) mod_ssl/2.2.8 OpenSSL/0.9.8g
X-Powered-By: PHP/5.2.4-2ubuntu5.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-
check=0
Pragma: no-cache
Content-Disposition: attachment; filename="Maxwell - Bad Habits
(Remixes).zip"
Content-Transfer-Encoding: binary
Content-Length: 54234978
Keep-Alive: timeout=15, max=98
Connection: Keep-Alive
Content-Type: application/zip
----------------------------------------------------------
3. as long as the zip file is downloading the site "freezes" until
download is complete, then the link I've clicked is "activated"
___________________________________________________________________________

And this is the headers from the test page:
http://lps.netlinq.dk/test010/test_zip.class.php
http://home.emax.dk/~emax/test/test_zip.class.php

Same files, different servers

headers from test010:

http://home.emax.dk/~emax/test/test_zip.class.php?zip_to_browser=1

GET /~emax/test/test_zip.class.php?zip_to_browser=1 HTTP/1.1
Host: home.emax.dk
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/
20090803 Ubuntu/9.04 (jaunty) Shiretoko/3.5.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://home.emax.dk/~emax/test/test_zip.class.php?test=15

HTTP/1.x 200 OK
Date: Fri, 02 Oct 2009 14:31:08 GMT
Server: Apache/1.3.37 (Unix) PHP/4.4.4
X-Powered-By: PHP/4.4.4
Pragma: public
Expires: 0
Cache-Control: must-revalidate, post-check=0, pre-check=0, private
Content-Disposition: attachment; filename="zipTest2.zip"
Content-Transfer-Encoding: binary
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/zip
____________________________________________________________________

headers from Netlinq:

GET /test010/test_zip.class.php?zip_to_browser=1 HTTP/1.1
Host: lps.netlinq.dk
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/
20090803 Ubuntu/9.04 (jaunty) Shiretoko/3.5.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://lps.netlinq.dk/test010/test_zip.class.php?test=21
Cookie: login_email=kim%40emax.dk;
PHPSESSID=fbb5d6adec802766cf6f638c99ab4f1d

HTTP/1.x 200 OK
Date: Fri, 02 Oct 2009 14:55:37 GMT
Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.6 with Suhosin-Patch
mod_ruby/1.2.6 Ruby/1.8.6(2007-09-24) mod_ssl/2.2.8 OpenSSL/0.9.8g
X-Powered-By: PHP/5.2.4-2ubuntu5.6
Pragma: public
Expires: 0
Cache-Control: must-revalidate, post-check=0, pre-check=0, private
Content-Disposition: attachment; filename="zipTest2.zip"
Content-Transfer-Encoding: binary
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/zip
____________________________________________________________________




--
Kind regards
Kim Emax - masterminds.dk

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