[mapserver-users] PHP $imgObj->saveImage(null) sends headers - Found word(s) list error in the Text body [Keyword]

[Alan Boudreault]

Please fill a ticket with the test case and assign it to "aboudreault". I will 
test it on php 5.2 and php 5.3 and see if we need to fix it.

Alan

On April 6, 2010 03:47:33 am Miloslav Kmeť wrote:
> Don't know, whether to call this bug or behavior, but I can confirm this
>  also on
> PHP 5.2.6-1+lenny8 with Suhosin-Patch 0.9.6.2 (cli) (built: Mar 14 2010
> 08:14:04)  with the latest mapscript from SVN and also with the last 5.6.3
> release.
> 
> I have no idea, wheter that php_header call was in 5.6.0, or why you didn't
> get that error.
> 
> Thanks
> 
> On pondelok 05 Apríl 2010 22:05:23 Pavel Iacovlev wrote:
> > I get no errors with your code, and yes I have header() before output,
> > I use it with Zend Framework so it does the same thing with headers as
> > symphony does.
> >
> > PHP 5.2.4-2ubuntu5.10 with Suhosin-Patch 0.9.6.2 (cli) (built: Jan  6
> > 2010 22:01:14)
> > MapScript: 5.6.0 (will compile latest and test against it)
> >
> > Error reporting:
> > error_reporting(E_ALL | E_STRICT);
> > ini_set('display_startup_errors', 1);
> > ini_set('display_errors', 1);
> >
> > 2010/4/5 Miloslav Kmeť <miloslav.kmet at gmail.com>:
> > > Hi I am sure, that I get an error with the latest code in this branch:
> > > https://svn.osgeo.org/mapserver/branches/branch-5-6/mapserver
> > >
> > > My PHP version is 5.3.2.
> > >
> > > Try this simple frameworkless php code:
> > >
> > > <?php
> > > error_reporting(E_ALL);
> > > ini_set('display_errors', 'on');
> > > $map = ms_newMapObj('./test.map'); // select your usual mapfile
> > > $img = $map->draw();
> > >
> > > ob_start();
> > > $img->saveImage(null);
> > > $data = ob_get_clean();
> > >
> > > header('Content-type: image/jpeg');
> > > echo $data;
> > > ?>
> > >
> > > The error is:
> > > Warning: Cannot modify header information - headers already sent in
> > > /www/test/buffer/mapserver/ob-reproduce.php on line 11
> > >
> > > I do not have a problem with collecting the data or using them. The
> > > problem is to send headers after $img->saveImage(null) call.
> > >
> > > Because of the symfony's framework behaviour - controller creates the
> > > data and the response later send them with additional headers I cannot
> > > send the headers before $img->saveImage();
> > >
> > > If you change your code and puts the header('Content-type: image/png');
> > > before imagepng($image); you will see that error.
> > >
> > > Thank you for giving a try.
> > >
> > > On pondelok 05 Apríl 2010 19:37:02 you wrote:
> > >> Oh sorry, your code is correct thought you used ob_end_clean and you
> > >> are using ob_get_clean. But the snippet works for me with out any
> > >> phpmapscript modification.
> > >>
> > >> 2010/4/5 Pavel Iacovlev <iacovlev.pavel at gmail.com>:
> > >> > 1) Your php code is not correct I think, ob_get_clean  just cleans
> > >> > the output and does not return the captured content.
> > >> > 2) Try with no framework, maybe it sends some headers before you run
> > >> > your code.
> > >> >
> > >> > This works for me in Zend Framework in MVC mode, should work for
> > >> > symfony too. ob_start();
> > >> > $image->saveimage('');
> > >> > $image = imagecreatefromstring(ob_get_contents());
> > >> > ob_end_clean();
> > >> > imagepng($image);
> > >> >
> > >> > 2010/4/5 Miloslav Kmeť <miloslav.kmet at gmail.com>:
> > >> >> Hi. I am trying to use php_mapscript in MVC framework (symfony) and
> > >> >> I want to catch the output of $imgObje->saveImage(null); for the
> > >> >> later processing, eg: using the builtin cache mechanism instead of
> > >> >> directly writing the file to the cache.
> > >> >>
> > >> >> My code very simplified looks like:
> > >> >>
> > >> >> ob_start();                            // start output buffering
> > >> >> $imgObj->saveImage(null);  // print output to std
> > >> >> $image = ob_get_clean();   // get the buffer and clen it
> > >> >>
> > >> >> header('Content-type: image/jpeg'); // setting the header
> > >> >> echo $image; // printing the image
> > >> >>
> > >> >> At the header line I got an header already sended error, even no
> > >> >> output will be brinted before.
> > >> >>
> > >> >> I looked into php_mapscript.c and I found that in the saveImage
> > >> >> function there is php_header(TSRMLS_C); As I do not know the PHP
> > >> >> internals, i do not know what that call is doing, but when I
> > >> >> removed it out, and recompiled the extension,
> > >> >>
> > >> >> Now output buffering is working correctly.
> > >> >>
> > >> >> What is the function doing? Should it be replaced in the main
> > >> >> development?
> > >> >>
> > >> >> Thanks
> > >> >> --
> > >> >> Miloslav Kmeť
> > >> >>
> > >> >> _______________________________________________
> > >> >> mapserver-users mailing list
> > >> >> mapserver-users at lists.osgeo.org
> > >> >> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> > >> >
> > >> > --
> > >> > http://iap.md, The future is open
> > >
> > > --
> > > Miloslav Kmeť
> > > _______________________________________________
> > > mapserver-users mailing list
> > > mapserver-users at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/mapserver-users
> 

-- 
Alan Boudreault
Mapgears
http://www.mapgears.com