[mod_python] How to make a handler for static files?

If your intent is only to serve up static files, you might be better  
off using
Apache rewrite rules rather than using mod_python.

I've not got my head around rewrite rules yet, but maybe someone else
here understand them better and can suggest something to try.

Graham

On 27/02/2006, at 8:58 PM, Scott Chapman wrote:

> Scott Chapman wrote:
>> Hi all!
>> I want to make a funky handler for static files.  It should return  
>> the requested static file if it's in the directory requested.  If  
>> it's not there, it should move up a directory and try there.
> Well,
> Here's what I came up with in the code and it works great.  It  
> doesn't handle logging issues but it's step #1.  It looks first in  
> the site specific directory then in the shared directory.  I had  
> the spec "backwards" above.
>
>> '''This little handler receives requests for files that would  
>> normally be sent statically.
>> If the file requested is in /images, and the sites internal name  
>> is "mischko" then it will look in:
>> /images/mischko for the file.  If it's not there, it will look in / 
>> images for it.
>> This allows a site to have custom versions of things and if it  
>> doesn't, use the shared versions.
>> It also allows the site to have a template that is happily  
>> ignorant of the situation.'''
>> from mod_python import apache
>> import os
>> import psycopg2
>> def parse_uri(uri):
>>     uri_list = uri.split('/')
>>     uri_list.insert(0,'')
>>     uri_list=uri_list[-3:]
>>     return uri_list
>> def _getInternalName(alias):
>>         _conn = psycopg2.connect("user=foo dbname=bar  
>> host=127.0.0.1 password=barfoo")
>>         _cursor = _conn.cursor()
>>         query = "SELECT hostname FROM host_aliases WHERE  
>> external_name = %s"
>>         parms = [alias]
>>         _cursor.execute(query, parms)
>>         rval = _cursor.fetchone()
>>         if rval:
>>             rval = rval[0]
>>         _conn.rollback()
>>         _conn.close()
>>         return (rval)
>> def handler(req):
>>     def _log(message):
>>         req.log_error(message)
>>     debug = True
>>     (subsite, moduleName, methodName)= parse_uri(req.uri)
>>     internalName = _getInternalName(req.hostname)
>>     if subsite:
>>         internalName = _getInternalName(subsite)
>>     if not internalName:
>>         if debug: _log('static_handler - illegal host name')
>>         raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
>>     orig_path = req.filename
>>     (path, filename) = os.path.split(req.filename)
>>     new_path = os.path.normpath(path + '/' + internalName + '/' +  
>> filename)
>>     if os.path.exists(new_path):
>>         use_path = new_path
>>     elif os.path.exists(orig_path):
>>         use_path = orig_path
>>     else:
>>         raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND
>>     if debug: _log('static_handler - used path: %s' % use_path)
>>     req.sendfile(use_path)
>>     return apache.OK
>
>
> -- 
> q: Why do so many people take an instant dislike to MySQL and PHP?
> a: It saves time.
> ps: Use PostgreSQL and Python instead.
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