Merge pull request #399 from lixxu/master

improve url_for to support multi values and special options

docs/sanic/routing.md

@@ -145,6 +145,28 @@ Other things to keep in mind when using `url_for`:
 url = app.url_for('post_handler', post_id=5, arg_one='one', arg_two='two')
 # /posts/5?arg_one=one&arg_two=two
 ```
+- Multivalue argument can be passed to `url_for`. For example:
+```python
+url = app.url_for('post_handler', post_id=5, arg_one=['one', 'two'])
+# /posts/5?arg_one=one&arg_one=two
+```
+- Also some special arguments (`_anchor`, `_external`, `_scheme`, `_method`, `_server`) passed to `url_for` will have special url building (`_method` is not support now and will be ignored). For example:
+```python
+url = app.url_for('post_handler', post_id=5, arg_one='one', _anchor='anchor')
+# /posts/5?arg_one=one#anchor
+
+url = app.url_for('post_handler', post_id=5, arg_one='one', _external=True)
+# //server/posts/5?arg_one=one
+# _external requires passed argument _server or SERVER_NAME in app.config or url will be same as no _external
+
+url = app.url_for('post_handler', post_id=5, arg_one='one', _scheme='http', _external=True)
+# http://server/posts/5?arg_one=one
+# when specifying _scheme, _external must be True
+
+# you can pass all special arguments one time
+url = app.url_for('post_handler', post_id=5, arg_one=['one', 'two'], arg_two=2, _anchor='anchor', _scheme='http', _external=True, _server='another_server:8888')
+# http://another_server:8888/posts/5?arg_one=one&arg_one=two&arg_two=2#anchor
+```
 - All valid parameters must be passed to `url_for` to build a URL. If a parameter is not supplied, or if a parameter does not match the specified type, a `URLBuildError` will be thrown.
 
 

sanic/sanic.py

@@ -275,6 +275,19 @@ class Sanic:
         matched_params = re.findall(
             self.router.parameter_pattern, uri)
 
+        # _method is only a placeholder now, don't know how to support it
+        kwargs.pop('_method', None)
+        anchor = kwargs.pop('_anchor', '')
+        # _external need SERVER_NAME in config or pass _server arg
+        external = kwargs.pop('_external', False)
+        scheme = kwargs.pop('_scheme', '')
+        if scheme and not external:
+            raise ValueError('When specifying _scheme, _external must be True')
+
+        netloc = kwargs.pop('_server', None)
+        if netloc is None and external:
+            netloc = self.config.get('SERVER_NAME', '')
+
         for match in matched_params:
             name, _type, pattern = self.router.parse_parameter_string(
                 match)
@@ -315,12 +328,9 @@ class Sanic:
                 replacement_regex, supplied_param, out)
 
         # parse the remainder of the keyword arguments into a querystring
-        if kwargs:
+        query_string = urlencode(kwargs, doseq=True) if kwargs else ''
-            query_string = urlencode(kwargs)
+        # scheme://netloc/path;parameters?query#fragment
-            out = urlunparse((
+        out = urlunparse((scheme, netloc, out, '', query_string, anchor))
-                '', '', out,
-                '', query_string, ''
-            ))
 
         return out
 

sanic/utils.py

@@ -6,7 +6,11 @@ PORT = 42101
 
 
 async def local_request(method, uri, cookies=None, *args, **kwargs):
+    if uri.startswith(('http:', 'https:', 'ftp:', 'ftps://' '//')):
+        url = uri
+    else:
         url = 'http://{host}:{port}{uri}'.format(host=HOST, port=PORT, uri=uri)
+
     log.info(url)
     async with aiohttp.ClientSession(cookies=cookies) as session:
         async with getattr(

tests/test_url_building.py

@@ -5,11 +5,19 @@ from sanic import Sanic
 from sanic.response import text
 from sanic.views import HTTPMethodView
 from sanic.blueprints import Blueprint
-from sanic.utils import sanic_endpoint_test
+from sanic.utils import sanic_endpoint_test, PORT as test_port
 from sanic.exceptions import URLBuildError
 
 import string
 
+URL_FOR_ARGS1 = dict(arg1=['v1', 'v2'])
+URL_FOR_VALUE1 = '/myurl?arg1=v1&arg1=v2'
+URL_FOR_ARGS2 = dict(arg1=['v1', 'v2'], _anchor='anchor')
+URL_FOR_VALUE2 = '/myurl?arg1=v1&arg1=v2#anchor'
+URL_FOR_ARGS3 = dict(arg1='v1', _anchor='anchor', _scheme='http',
+                     _server='localhost:{}'.format(test_port), _external=True)
+URL_FOR_VALUE3 = 'http://localhost:{}/myurl?arg1=v1#anchor'.format(test_port)
+
 
 def _generate_handlers_from_names(app, l):
     for name in l:
@@ -39,6 +47,23 @@ def test_simple_url_for_getting(simple_app):
         assert response.text == letter
 
 
+@pytest.mark.parametrize('args,url',
+                         [(URL_FOR_ARGS1, URL_FOR_VALUE1),
+                          (URL_FOR_ARGS2, URL_FOR_VALUE2),
+                          (URL_FOR_ARGS3, URL_FOR_VALUE3)])
+def test_simple_url_for_getting_with_more_params(args, url):
+    app = Sanic('more_url_build')
+
+    @app.route('/myurl')
+    def passes(request):
+        return text('this should pass')
+
+    assert url == app.url_for('passes', **args)
+    request, response = sanic_endpoint_test(app, uri=url)
+    assert response.status == 200
+    assert response.text == 'this should pass'
+
+
 def test_fails_if_endpoint_not_found():
     app = Sanic('fail_url_build')
 
@@ -75,6 +100,19 @@ def test_fails_url_build_if_param_not_passed():
     assert 'Required parameter `Z` was not passed to url_for' in str(e.value)
 
 
+def test_fails_url_build_if_params_not_passed():
+    app = Sanic('fail_url_build')
+
+    @app.route('/fail')
+    def fail():
+        return text('this should fail')
+
+    with pytest.raises(ValueError) as e:
+        app.url_for('fail', _scheme='http')
+
+    assert str(e.value) == 'When specifying _scheme, _external must be True'
+
+
 COMPLEX_PARAM_URL = (
     '/<foo:int>/<four_letter_string:[A-z]{4}>/'
     '<two_letter_string:[A-z]{2}>/<normal_string>/<some_number:number>')