如何在 Django 应用程序中处理 URL 模式中的参数

Question

As we know most URL schemes base their URL syntax on this nine-part general format: <scheme>://<user>:<password>@<host>:<port>/<path>;<params>?<query>#<frag>

I know I can get the query strings in Django request.GET dict. But how to get parameters? It seems HttpRequest in Django can not deal with params defined in URL.

For example: http://www.example.com/hello;param1=aaaa;param2=bbbb

Is there any way to extract params like this in Django without writing own regex in url pattern.

Any help will be appreciated.

Answer 1

The path segment parameters you're talking about were defined in RFC 2396 . This RFC has been obsolete since 2005. The new standard, RFC 3986, does not define a specific way to define path segment parameters. The relevant section states :

Aside from dot-segments in hierarchical paths, a path segment is considered opaque by the generic syntax. [...] For example, the semicolon (";") and equals ("=") reserved characters are often used to delimit parameters and parameter values applicable to that segment. [...] Parameter types may be defined by scheme-specific semantics, but in most cases the syntax of a parameter is specific to the implementation of the URI's dereferencing algorithm.

Django uses the new standard and does not define any specific way to parse path segment parameters. However, Python defines the urlparse() function, which parses the url according to RFC2396. You can use this to extract the path parameters:

from urllib.parse import urlparse  # urlparse.urlparse on Python 2

params = urlparse(request.path).params

Answer 2

to capture params you've to define url patterns as per that.

lets assume your url is http://myurl.com/mydashboard/250?sort=-1&q=this so here 250 is param which you want.

To capture the same you've to define url like below

url(r'^mydashboard/(?P<weeknum>\d+)/$',
    mydashboard, name='mydashboard'),

and now the view definition of mydashboard will have another input param like below

def nagdashboard(request, weeknum):

And to get GET params or POST params you can use.

request.GET.get('sort')

For further reading on patterns refer to here