On http://webpy.org/cookbook/ctx we written under "Data Found in ctx":
> homepath – The part of the path requested by the user which was trimmed off
> the current app. That is homepath + path = the path actually requested in
> HTTP by the user. E.g. /admin This seems to be derived during startup from
> the environment variable REAL_SCRIPT_NAME. It affects what web.url() will
> prepend to supplied urls. This in turn affects where web.seeother() will go,
> which might interact badly with your url rewriting scheme (e.g. mod_rewrite)
"This seems to be derived from environment variable REAL_SCRIPT_NAME."
Seems? :)
All redirecting http resonses are handled via the Redirect class in webapi.py:
class Redirect(HTTPError):
"""A `301 Moved Permanently` redirect."""
def __init__(self, url, status='301 Moved Permanently', absolute=False):
"""
Returns a `status` redirect to the new URL.
`url` is joined with the base URL so that things like
`redirect("about") will work properly.
"""
newloc = urlparse.urljoin(ctx.path, url)
if newloc.startswith('/'):
if absolute:
home = ctx.realhome
else:
home = ctx.home
newloc = home + newloc
headers = {
'Content-Type': 'text/html',
'Location': newloc
}
HTTPError.__init__(self, status, headers, "")
Here we have the variable 'realhome' which is assigned in application.py:
ctx.homedomain = ctx.protocol + '://' + env.get('HTTP_HOST', '[unknown]')
ctx.homepath = os.environ.get('REAL_SCRIPT_NAME', env.get('SCRIPT_NAME', ''))
ctx.home = ctx.homedomain + ctx.homepath
#@@ home is changed when the request is handled to a sub-application.
#@@ but the real home is required for doing absolute redirects.
ctx.realhome = ctx.home
So probably, changin ctx.realhome would help. I have no experience with
sub-applications though.
It would be great if anybody knowledgeable could chime in and recommend the best
technique for setting the redirect base.
Bests,
Dragan
Am 30.01.2012 20:49, schrieb Alex Quinn:
> Thanks, Dragan.
>
> That's a novel solution. I hadn't thought of changing an environment
> variable, but it sounds like it would work. As for a web.config.base_url, in
> theory the web.homepath is supposed to do exactly that. As far as I can
> tell, it's just broken (or at least doesn't work how I expected).
>
> For now, I'm using the function below. Instead of calling web.seeother(url),
> I call web.seeother(make_url(url)).
>
> If this is an acknowledged issue and a patch would be welcome, I could
> probably take another shot at a more general fix that would hopefully not
> have any unintended consequences.
>
> I had also been grappling with how to handle links embedded in the templates,
> but I just thought of a solution: Put a <BASE href="http://
> example.com/myapp/"> tag with the application's base URL in the <HEAD> of the
> base template.
>
> Alex
>
>
>
>
>
> ___________________________________________________________________________
> def make_url(url): """ Fix an apparent incompatibility between how I'm using
> Apache URL rewriting and the web.seeother (and web.redirect, etc.) commands.
>
> - If input is full URL (i.e., http://example.com/blah/), return as is. - If
> input starts with "/", treat as relative to this application's base. -
> Otherwise, append it to the current URL, minus any ending filename. """
> import urlparse, os
>
> if "://" not in url: url_parts =
> list(urlparse.urlparse(web.ctx.env["REQUEST_URI"])) old_path = url_parts[2]
>
> if url.startswith("/"): base = os.path.basename(__file__) home =
> web.ctx.home if home.endswith(base) and not old_path.endswith(__file__): home
> = home[:0-len(base)] url = home.rstrip("/") + url else: new_path =
> os.path.normpath(os.path.join(old_path, url)) url_parts[2] = new_path url =
> urlparse.urlunparse(url_parts) return url
> ___________________________________________________________________________
>
>
>
>
>
>
>
> On Jan 30, 4:28 am, Dragan Espenschied <d...@a-blast.org> wrote:
>> This redirecting problem is indeed annoying, I usually "solve" it by
>> changing an environment variable, for example like this:
>>
>> os.environ['REAL_SCRIPT_NAME'] = '/webpy_bug_report/'
>>
>> This environment is the source for the prefixes of webpy's redirects.
>>
>> I would love if there would be a solution that works across all web servers
>> and systems, I do not have enough experience with different setups though.
>>
>> Maybe the easiest addition to webpy would be a web.config setting like
>> "base_url" that would be used in preference over the environment variable.
>>
>> Bests, Dragan
>>
>> Am 29.01.2012 21:26, schrieb Alex Quinn:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>> Below is a stripped down example that illustrates the problem. If I go
>>> tohttp://example.com/webpy_bug_report/it works fine. If I go to
>>> http://example.com/webpy_bug_report/redirect/I expect to be redirected
>>> tohttp://example.com/webpy_bug_report/but instead I am redirected
>>> tohttp://example.com/webpy_bug_report/redirect_problem.py/. I've tried
>>> this under plain CGI as well as FastCGI.
>>
>>> Upon further testing, I realized my current fix doesn't quite work. If
>>> this is indeed a bug, I'd be happy to take another try at fixing it.
>>> However, it seems like this would have come up for others before. I
>>> couldn't find anything in the list archives or the issue tracker. If I'm
>>> doing something wrong or if I missed a solution online somewhere, I'd be
>>> most grateful if somebody could point me in the right direction.
>>
>>> Thanks, Alex
>>
>>> ___________________________________________________________ # .htaccess
>>
>>> RewriteEngine on RewriteBase /webpy_bug_report/ RewriteCond
>>> %{REQUEST_URI} !^/webpy_bug_report/favicon.ico$ RewriteCond
>>> %{REQUEST_URI} !^(/.*)+redirect_problem.py/ RewriteRule ^(.*)$
>>> redirect_problem.py/$1 [PT]
>>
>>> ___________________________________________________________ #
>>> redirect_problem.py
>>
>>> import web
>>
>>> urls = ( '/', 'index', '/redirect/','redirect' )
>>
>>> class index: def GET(self): return "This is the index page."
>>
>>> class redirect: def GET(self): raise web.seeother('/')
>>
>>> app = web.application(urls, globals())
>>
>>> if __name__ == '__main__': app.run()
>>
>> --http://noobz.cc/http://digitalfolklore.org/http://contemporary-home-computing.org/1tb/
>
>>
--
http://noobz.cc/
http://digitalfolklore.org/
http://contemporary-home-computing.org/1tb/
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