Added support for basic URL generation without request contexts.

flask/app.py

@@ -250,7 +250,8 @@ class Flask(_PackageBoundObject):
         'SESSION_COOKIE_SECURE':                False,
         'MAX_CONTENT_LENGTH':                   None,
         'TRAP_BAD_REQUEST_ERRORS':              False,
-        'TRAP_HTTP_EXCEPTIONS':                 False
+        'TRAP_HTTP_EXCEPTIONS':                 False,
+        'PREFERRED_URL_SCHEME':                 'http'
     })
 
     #: The rule object to use for URL rules created.  This is used by
@@ -1370,9 +1371,21 @@ class Flask(_PackageBoundObject):
         so the request is passed explicitly.
 
         .. versionadded:: 0.6
+
+        .. versionchanged:: 0.9
+           This can now also be called without a request object when the
+           UR adapter is created for the application context.
         """
+        if request is not None:
             return self.url_map.bind_to_environ(request.environ,
                 server_name=self.config['SERVER_NAME'])
+        # We need at the very least the server name to be set for this
+        # to work.
+        if self.config['SERVER_NAME'] is not None:
+            return self.url_map.bind(
+                self.config['SERVER_NAME'],
+                script_name=self.config['APPLICATION_ROOT'] or '/',
+                url_scheme=self.config['PREFERRED_URL_SCHEME'])
 
     def inject_url_defaults(self, endpoint, values):
         """Injects the URL defaults for the given endpoint directly into

flask/ctx.py

@@ -70,6 +70,7 @@ class AppContext(object):
 
     def __init__(self, app):
         self.app = app
+        self.url_adapter = app.create_url_adapter(None)
 
     def push(self):
         """Binds the app context to the current context."""

flask/helpers.py

@@ -50,7 +50,8 @@ except ImportError:
 
 from jinja2 import FileSystemLoader
 
-from .globals import session, _request_ctx_stack, current_app, request
+from .globals import session, _request_ctx_stack, _app_ctx_stack, \
+     current_app, request
 
 
 def _assert_have_json():
@@ -197,9 +198,15 @@ def url_for(endpoint, **values):
     :param _anchor: if provided this is added as anchor to the URL.
     :param _method: if provided this explicitly specifies an HTTP method.
     """
-    ctx = _request_ctx_stack.top
+    appctx = _app_ctx_stack.top
+    reqctx = _request_ctx_stack.top
+
+    # If request specific information is available we have some extra
+    # features that support "relative" urls.
+    if reqctx is not None:
+        url_adapter = reqctx.url_adapter
         blueprint_name = request.blueprint
-    if not ctx.request._is_old_module:
+        if not reqctx.request._is_old_module:
             if endpoint[:1] == '.':
                 if blueprint_name is not None:
                     endpoint = blueprint_name + endpoint
@@ -213,10 +220,17 @@ def url_for(endpoint, **values):
             elif endpoint.startswith('.'):
                 endpoint = endpoint[1:]
         external = values.pop('_external', False)
+
+    # Otherwise go with the url adapter from the appctx and make
+    # the urls external by default.
+    else:
+        url_adapter = appctx.url_adapter
+        external = values.pop('_external', True)
+
     anchor = values.pop('_anchor', None)
     method = values.pop('_method', None)
-    ctx.app.inject_url_defaults(endpoint, values)
+    appctx.app.inject_url_defaults(endpoint, values)
-    rv = ctx.url_adapter.build(endpoint, values, method=method,
+    rv = url_adapter.build(endpoint, values, method=method,
                            force_external=external)
     if anchor is not None:
         rv += '#' + url_quote(anchor)

flask/testsuite/appctx.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.testsuite.appctx
+    ~~~~~~~~~~~~~~~~~~~~~~
+
+    Tests the application context.
+
+    :copyright: (c) 2012 by Armin Ronacher.
+    :license: BSD, see LICENSE for more details.
+"""
+
+from __future__ import with_statement
+
+import flask
+import unittest
+from flask.testsuite import FlaskTestCase
+
+
+class AppContextTestCase(FlaskTestCase):
+
+    def test_basic_support(self):
+        app = flask.Flask(__name__)
+        app.config['SERVER_NAME'] = 'localhost'
+        app.config['PREFERRED_URL_SCHEME'] = 'https'
+
+        @app.route('/')
+        def index():
+            pass
+
+        with app.app_context():
+            rv = flask.url_for('index')
+            self.assert_equal(rv, 'https://localhost/')
+
+
+def suite():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(AppContextTestCase))
+    return suite