With one more patch pending, the new URL router is looking pretty stable. There 
are some features pending, but they'll have to wait.

I thought I'd describe some of the possibilities with a few use cases.


Suppose you've written an app, named it 'myapp', and want to make it the 
default, with its name always removed. Your default controller is still 
'default', and you want to remove its name from user-visible URLs as well. 
Here's what you put in routes.py:

routers = dict(
    BASE  = dict( default_application='myapp' ),
)

That's it. And it's smart enough to know how to do the right thing with URLs 
like:

        http://domain.com/myapp/default/myapp
or      http://domain.com/myapp/myapp/index

...where normal shortening would be ambiguous.


If you have two applications, myapp and myapp2, you'll get the same effect, and 
additionally myapp2's default controller will be stripped from the URL whenever 
it's safe (which is mostly all the time).



Another case. Suppose you want to support URL-based languages, where your URLs 
look like this:

        http://myapp/en/some/path

or (rewritten)

        http://en/some/path

Here's how:

routers = dict(
    BASE  = dict( default_application='myapp' ),
    myapp = dict( languages=['en', 'it', 'jp'], default_language='en' ),
)

Now an incoming URL like this:

        http:/domain.com/it/some/path

will be routed to /myapp/some/path, and request.uri_language will be set to 
'it', so you can force the translation. You can also have language-specific 
static files.

        http://domain.com/it/static/filename

will be mapped to:

        applications/myapp/static/it/filename

...if that file exists. If it doesn't, then URLs like:

        http://domain.com/it/static/base.css

...will still map to:

        applications/myapp/static/base.css

(because there is no static/it/base.css)

So you can now have language-specific static files, including images, if you 
need to.


Domain mapping is supported as well.

routers = dict(
    BASE  = dict(
        domains = {
            'domain1.com' : 'app1',
            'domain2.com' : 'app2',
        }
    ),
)

does what you'd expect.

routers = dict(
    BASE  = dict(
        domains = {
            'domain.com:80'  : 'app/insecure',
            'domain.com:443' : 'app/secure',
        }
    ),
)

...maps http://domain.com accesses to app's controller named 'insecure', while 
https accesses go to the 'secure' controller. Or you can map different ports to 
different apps, in the obvious way.


There's more, but mostly everything happens automatically, and there's no need 
to dig into the details of configuration unless there's some non-standard thing 
you need. There's a bit more documentation in router.example.py.

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