In what directory is myimage.jpg? Give full path name.

Graham

> On 3 Feb 2018, at 4:14 am, Larry Cotton <larry.cot...@gmail.com> wrote:
> 
> Hi
> 
> Thank you for your reply.
> 
> I was naively thinking that because I did not see a request arrive it was not 
> sent by the browser, but of course it is probably being filtered out by 
> apache. I have included a summary of the apache configuration I am using in 
> case there is anything obvious there you can see, but I guess I really need 
> to gen up on what apache does before the requests are handed to the mod_wsgi 
> app. A quick google suggests the forensic logging module (mod_log_forensic) 
> allows logging of requests before and after processing - looks like this 
> would help.
> 
> 
> DocumentRoot "/myserver/usr/local/apache/htdocs"
> 
> <Directory "/myserver/usr/local/apache/htdocs">
>     Options Indexes FollowSymLinks
> 
>     AllowOverride None
> 
>     Require all granted
> </Directory>
> 
> <IfModule dir_module>
>     DirectoryIndex index.html
> </IfModule>
> 
> <VirtualHost *:80>
> 
>     ServerName myserver.loc.comp.com <http://myserver.loc.comp.com/>
>     ServerAlias myserver
>     ServerAdmin admin@gmail <mailto:admin@gmail>
>     DocumentRoot "/myserver/usr/local/apache/htdocs"
> 
>     <Directory /myserver/usr/local/apache/htdocs>
>     Options Indexes FollowSymLinks
>     Require all granted
>     </Directory>
> 
>     WSGIDaemonProcess myserver processes=2 threads=15 display-name=%{GROUP} 
> maximum-requests=10000 
> python-path=/myserver/usr/local/apache/wsgi-practice-scripts
>     WSGIProcessGroup myserver
> 
>     WSGIScriptAliasMatch ^/wsgipractice/([^/]+) 
> /myserver/usr/local/apache/wsgi-practice-scripts/$1.wsgi
> 
>     WSGIProcessGroup myserver
> 
>     <Directory /myserver/usr/local/apache/wsgi-practice-scripts>
>     Options Indexes FollowSymLinks
>     Require all granted
>     </Directory>
> 
> </VirtualHost>
> 
> On Thursday, February 1, 2018 at 11:02:29 AM UTC, Graham Dumpleton wrote:
> 
> How are you configuring Apache for mod_wsgi?
> 
> Your code works, so the problem is likely how you are setting up the serving 
> of the static file by Apache.
> 
> Graham
> 
>> On 1 Feb 2018, at 9:14 pm, Larry Cotton <larry....@ <>gmail.com 
>> <http://gmail.com/>> wrote:
>> 
>> Hi
>> 
>> Thank you for the reply.
>> 
>> One of the reasons I am using mod_wsgi is to be able to understand a bit 
>> more about what goes on underneath.
>> 
>> Thus far I have not had too many problems with mod_wsgi - the tutorials give 
>> information both on logging requests/responses and debugging the pythonry, 
>> so I am happy to go with it at the moment. If I get in to real difficulty I 
>> will take a step back.
>> 
>> I already have a mass of stuff using cherrypy (which I understand has a hook 
>> for mod_wsgi, though I have not tried it yet), does Flask do anything 
>> different from CherryPy ?
>> 
>> 
>> On Wednesday, January 31, 2018 at 2:11:12 PM UTC, Larry Cotton wrote:
>> Hi
>> 
>> System Info:
>> 
>> # cat /etc/redhat-release
>> Red Hat Enterprise Linux Server release 6.4 (Santiago)
>> 
>> # httpd -v
>> Server version: Apache/2.4.25 (Unix)
>> Server built:   Jun 27 2017 16:23:25
>> 
>> # python --version
>> Python 2.7.11
>> 
>> -------------------------------------------------
>> 
>> 
>> I have set up apache + mod_wsgi and have done some playing with it to help 
>> get some understanding of how client  and server interact.
>> 
>> I am new to mod_wsgi and have not yet used it in anger, but the simple apps 
>> I have written seem to be working ok.
>> 
>> However there is something I would like to understand regarding how the 
>> browser decides when to render a page.
>> 
>> In the simple application below(tst1.wsgi) below I generate a simple html 
>> page that contains an image, logging the REQUEST_URI
>> for each request.
>> 
>> If, in the browser, I type the url <myserver>/wsgipractice/tst1/index the 
>> browser attempts to fully render the page and puts in a second request to 
>> get the image. The log output containing the REQUEST_URIs looks like:
>> /wsgipractice/tst1/index
>> /wsgipractice/tst1/images/myimage.jpg
>> 
>> If, however, I type only the root url in the browser: 
>> <myserver>/wsgipractice/tst1 the browser does not seem to attempt to render 
>> the html page. No second request is put in to fetch the image. The log 
>> output containing the REQUEST_URIs looks like:
>> /wsgipractice/tst1
>> 
>> It does not seem to matter what comes after tst1 in the url (I can type in 
>> tst1/bob, or even simply terminate with separator: tst1/).
>> 
>> Does anyone know what it is that triggers the browser to fully (or not) 
>> render a page ?
>> 
>> 
>> tst1.wsgi
>> ----------
>> import os
>> 
>> def get_page(environ, mime_type):
>> 
>>     html_str = \
>>         ('<html><body>'
>>          '<center><p style="font-weight:bold;">LARRY HOME</p></center>'
>>          '<div style="background-image: url(images/myimage.jpg)">'
>>          '<a href="http://google.com";>' <>
>>          '<div>Home</div></a>'
>>          '</div>'
>>          '<br><p>Body</p><br></body></html>')
>> 
>>     return html_str, mime_type
>> 
>> def application(environ, start_response):
>> 
>>     status = '200 OK'
>> 
>>     output = u''
>> 
>>     log_file = open(('/logs/tstpagegen.log'), 'a')
>> 
>>     log_file.write(environ['REQUEST_URI'] + '\n')
>> 
>>     log_file.close()
>> 
>>     output, mime_type = get_page(environ, 'text/html')
>> 
>>     response_headers = [('Content-type', mime_type),
>>                         ('Content-Length', str(len(output)))]
>> 
>>     start_response(status, response_headers)
>> 
>>     return [output]
>> 
>> 
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