Added url and schema_url arguments (#4321)

docs/api-guide/schemas.md

@@ -128,9 +128,11 @@ that include the Core JSON media type in their `Accept` header.
 This is a great zero-configuration option for when you want to get up and
 running really quickly.
 
-The only other available option to `DefaultRouter` is `schema_renderers`, which
-may be used to pass the set of renderer classes that can be used to render
-schema output.
+The other available options to `DefaultRouter` are:
+
+#### schema_renderers
+
+May be used to pass the set of renderer classes that can be used to render schema output.
 
     from rest_framework.renderers import CoreJSONRenderer
     from my_custom_package import APIBlueprintRenderer
@@ -139,6 +141,17 @@ schema output.
         CoreJSONRenderer, APIBlueprintRenderer
     ])
 
+#### schema_url
+
+May be used to pass the root URL for the schema. This can either be used to ensure that
+the schema URLs include a canonical hostname and schema, or to ensure that all the
+schema URLs include a path prefix.
+
+    router = DefaultRouter(
+        schema_title='Server Monitoring API',
+        schema_url='https://www.example.org/api/'
+    )
+
 If you want more flexibility over the schema output then you'll need to consider
 using `SchemaGenerator` instead.
 
@@ -264,6 +277,7 @@ Typically you'll instantiate `SchemaGenerator` with a single argument, like so:
 Arguments:
 
 * `title` - The name of the API. **required**
+* `url` - The root URL of the API schema. This option is not required unless the schema is included under path prefix.
 * `patterns` - A list of URLs to inspect when generating the schema. Defaults to the project's URL conf.
 * `urlconf` - A URL conf module name to use when generating the schema. Defaults to `settings.ROOT_URLCONF`.
 

rest_framework/compat.py

@@ -23,6 +23,12 @@
     from django.utils import importlib  # Will be removed in Django 1.9
 
 
+try:
+    import urlparse  # Python 2.x
+except ImportError:
+    import urllib.parse as urlparse
+
+
 def unicode_repr(instance):
     # Get the repr of an instance, but ensure it is a unicode string
     # on both python 3 (already the case) and 2 (not the case).

rest_framework/routers.py

@@ -278,11 +278,14 @@ class DefaultRouter(SimpleRouter):
     def __init__(self, *args, **kwargs):
         if 'schema_renderers' in kwargs:
             assert 'schema_title' in kwargs, 'Missing "schema_title" argument.'
+        if 'schema_url' in kwargs:
+            assert 'schema_title' in kwargs, 'Missing "schema_title" argument.'
         self.schema_title = kwargs.pop('schema_title', None)
+        self.schema_url = kwargs.pop('schema_url', None)
         self.schema_renderers = kwargs.pop('schema_renderers', self.default_schema_renderers)
         super(DefaultRouter, self).__init__(*args, **kwargs)
 
-    def get_api_root_view(self, schema_urls=None):
+    def get_api_root_view(self, api_urls=None):
         """
         Return a view to use as the API root.
         """
@@ -294,11 +297,12 @@ def get_api_root_view(self, schema_urls=None):
         view_renderers = list(api_settings.DEFAULT_RENDERER_CLASSES)
         schema_media_types = []
 
-        if schema_urls and self.schema_title:
+        if api_urls and self.schema_title:
             view_renderers += list(self.schema_renderers)
             schema_generator = SchemaGenerator(
                 title=self.schema_title,
-                patterns=schema_urls
+                url=self.schema_url,
+                patterns=api_urls
             )
             schema_media_types = [
                 renderer.media_type
@@ -347,7 +351,7 @@ def get_urls(self):
         urls = super(DefaultRouter, self).get_urls()
 
         if self.include_root_view:
-            view = self.get_api_root_view(schema_urls=urls)
+            view = self.get_api_root_view(api_urls=urls)
             root_url = url(r'^$', view, name=self.root_view_name)
             urls.append(root_url)
 

rest_framework/schemas.py

@@ -6,7 +6,7 @@
 from django.utils import six
 
 from rest_framework import exceptions, serializers
-from rest_framework.compat import coreapi, uritemplate
+from rest_framework.compat import coreapi, uritemplate, urlparse
 from rest_framework.request import clone_request
 from rest_framework.views import APIView
 
@@ -57,7 +57,7 @@ class SchemaGenerator(object):
         'delete': 'destroy',
     }
 
-    def __init__(self, title=None, patterns=None, urlconf=None):
+    def __init__(self, title=None, url=None, patterns=None, urlconf=None):
         assert coreapi, '`coreapi` must be installed for schema support.'
 
         if patterns is None and urlconf is not None:
@@ -70,7 +70,11 @@ def __init__(self, title=None, patterns=None, urlconf=None):
             urls = import_module(settings.ROOT_URLCONF)
             patterns = urls.urlpatterns
 
+        if url and not url.endswith('/'):
+            url += '/'
+
         self.title = title
+        self.url = url
         self.endpoints = self.get_api_endpoints(patterns)
 
     def get_schema(self, request=None):
@@ -102,7 +106,7 @@ def get_schema(self, request=None):
             insert_into(content, key, link)
 
         # Return the schema document.
-        return coreapi.Document(title=self.title, content=content)
+        return coreapi.Document(title=self.title, content=content, url=self.url)
 
     def get_api_endpoints(self, patterns, prefix=''):
         """
@@ -203,7 +207,7 @@ def get_link(self, path, method, callback):
             encoding = None
 
         return coreapi.Link(
-            url=path,
+            url=urlparse.urljoin(self.url, path),
             action=method.lower(),
             encoding=encoding,
             fields=fields