[mod_python] Http Response None - Page renders as Text

Graham Dumpleton grahamd at dscpl.com.au
Sat Oct 28 08:10:21 EDT 2006


Try not setting a content length. You might be getting the content
length wrong and screwing up any HTTP 1.1 pipelining of requests.
Ie., overlength data from a prior request is coming through as start
of subsequent request.

Graham

On 28/10/2006, at 8:40 PM, Thimios Katsoulis wrote:

> Hello all.
> I am developing a site in mod_python and I am facing a
> problem.
> The nasty thing is that this problem does not occur
> all the time .
> The problem is that firefox renders the  page and
> displays it as text . So what you see is the html
> source and not the rendered page.
> This problem occurs once in many times . When you hit
> refresh the page renders normally.
> I have set content_type to "text/html".
> Here is the problematic output as seen on firefox:
>
> NoneHTTP/1.1 200 OK
> Date: Sat, 28 Oct 2006 10:13:32 GMT
> Server: Apache/2.0.55 (Ubuntu) mod_python/3.1.4
> Python/2.4.3 PHP/5.1.2
> Content-Length: 1974
> Keep-Alive: timeout=15, max=95
> Connection: Keep-Alive
> Content-Type: text/html; charset=UTF-8
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
> Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
>
> <html xmlns="http://www.w3.org/1999/xhtml"
> xml:lang="en">
>
> <head>
>
> .....
> and the html source continues.
>
> If you hit refresh , I repeat , page renders normally.
> This behaviour is seen on a 1.0.8 firefox on Suse
> linux 10.0 on a machine on my local lan.
> The test web server is also on my local lan and is
> Ubuntu 6.0.6 with mod_python/3.1.4 as you can notice
> on the header.
> Please notice also the first line of the output
> "NoneHTTP/1.1 200 OK" .
>
> Here are the settings of the site :
> -----------------------------------------
> <VirtualHost *>
>         ServerAdmin webmaster at localhost
>         ServerName www.evropi.com
>         DocumentRoot /var/www/evropi
>         <Directory /var/www/evropi>
>                 Options None
>                 AllowOverride All
>                 Order allow,deny
>                 allow from all
>
>                 SetHandler mod_python
>                 PythonHandler start
>                 PythonDebug On
>
>         </Directory>
>
>
>         ErrorLog /var/log/apache2/error.log
>
>         # Possible values include: debug, info,
> notice, warn, error, crit,
>         # alert, emerg.
>         LogLevel warn
>
>         ServerSignature On
>
>
>
> </VirtualHost>
> ----------------------------------------
> Please notice also that this is not a real domain name
> .
> It's just used for development . I am testing a site
> by modyfing my local lan's machine's /etc/hosts files.
>
> Here is the start.py python script :
> ----------------------------------------------------
> import time
> from mod_python import apache
> def handler(req):
>         #start=time.time()
>         req.content_type = "text/html"
>         from lib import SiteBuilder
>         reload(SiteBuilder)
>         siteBuilder=SiteBuilder.SiteBuilder(req.uri)
>         data=siteBuilder.BuildPage(req)
>         #diff=time.time()-start
>         #req.write("%f" % (diff))
>         data=str(data)
>         lenData=len(data)
>         req.content_type = "text/html"
>         req.set_content_length(lenData)
>         req.write(data)
>
>         return apache.OK
>
> -----------------------------------------------
>
> I have noticed this behaviour from other pc's as well
> , mostly on Firefox.
> But this does not happen all the times , it is
> something random , and as a developer I consider
> random problem occuring very nasty .
> Anyone has seen this behaviour before ?
> Should I send http headers before calling req.write()?
> I 'll appreciate any help .
>
> Thanks.
> Thimios Katsoulis
>
>
>
>
>
>
> 	
>
> 	
> 		
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