Merge pull request #167 from AntonDnepr/class-based-views

Class based views

README.md

@@ -52,6 +52,7 @@ app.run(host="0.0.0.0", port=8000)
  * [Middleware](docs/middleware.md)
  * [Exceptions](docs/exceptions.md)
  * [Blueprints](docs/blueprints.md)
+ * [Class Based Views](docs/class_based_views.md)
  * [Cookies](docs/cookies.md)
  * [Static Files](docs/static_files.md)
  * [Deploying](docs/deploying.md)

docs/class_based_views.md

@@ -0,0 +1,44 @@
+# Class based views
+
+Sanic has simple class based implementation. You should implement methods(get, post, put, patch, delete) for the class to every HTTP method you want to support. If someone tries to use a method that has not been implemented, there will be 405 response.
+
+## Examples
+```python
+from sanic import Sanic
+from sanic.views import HTTPMethodView
+
+app = Sanic('some_name')
+
+
+class SimpleView(HTTPMethodView):
+
+  def get(self, request):
+      return text('I am get method')
+
+  def post(self, request):
+      return text('I am post method')
+
+  def put(self, request):
+      return text('I am put method')
+
+  def patch(self, request):
+      return text('I am patch method')
+
+  def delete(self, request):
+      return text('I am delete method')
+
+app.add_route(SimpleView(), '/')
+
+```
+
+If you need any url params just mention them in method definition:
+
+```python
+class NameView(HTTPMethodView):
+
+  def get(self, request, name):
+    return text('Hello {}'.format(name))
+
+app.add_route(NameView(), '/<name')
+
+```

docs/routing.md

@@ -29,4 +29,16 @@ async def person_handler(request, name):
 async def folder_handler(request, folder_id):
 	return text('Folder - {}'.format(folder_id))
 
+async def handler1(request):
+	return text('OK')
+app.add_route(handler1, '/test')
+
+async def handler(request, name):
+	return text('Folder - {}'.format(name))
+app.add_route(handler, '/folder/<name>')
+
+async def person_handler(request, name):
+	return text('Person - {}'.format(name))
+app.add_route(handler, '/person/<name:[A-z]>')
+
 ```

requirements-dev.txt

@@ -11,3 +11,4 @@ bottle
 kyoukai
 falcon
 tornado
+aiofiles

sanic/blueprints.py

@@ -91,6 +91,12 @@ class Blueprint:
             return handler
         return decorator
 
+    def add_route(self, handler, uri, methods=None):
+        """
+        """
+        self.record(lambda s: s.add_route(handler, uri, methods))
+        return handler
+
     def listener(self, event):
         """
         """

sanic/sanic.py

@@ -60,6 +60,19 @@ class Sanic:
 
         return response
 
+    def add_route(self, handler, uri, methods=None):
+        """
+        A helper method to register class instance or
+        functions as a handler to the application url
+        routes.
+        :param handler: function or class instance
+        :param uri: path of the URL
+        :param methods: list or tuple of methods allowed
+        :return: function or class instance
+        """
+        self.route(uri=uri, methods=methods)(handler)
+        return handler
+
     # Decorator
     def exception(self, *exceptions):
         """

sanic/utils.py

@@ -16,7 +16,8 @@ async def local_request(method, uri, cookies=None, *args, **kwargs):
 
 
 def sanic_endpoint_test(app, method='get', uri='/', gather_request=True,
-                        loop=None, *request_args, **request_kwargs):
+                        loop=None, debug=False, *request_args,
+                        **request_kwargs):
     results = []
     exceptions = []
 
@@ -34,7 +35,8 @@ def sanic_endpoint_test(app, method='get', uri='/', gather_request=True,
             exceptions.append(e)
         app.stop()
 
-    app.run(host=HOST, port=42101, after_start=_collect_response, loop=loop)
+    app.run(host=HOST, debug=debug, port=42101,
+            after_start=_collect_response, loop=loop)
 
     if exceptions:
         raise ValueError("Exception during request: {}".format(exceptions))

sanic/views.py

@@ -0,0 +1,36 @@
+from .exceptions import InvalidUsage
+
+
+class HTTPMethodView:
+    """ Simple class based implementation of view for the sanic.
+    You should implement methods(get, post, put, patch, delete) for the class
+    to every HTTP method you want to support.
+    For example:
+        class DummyView(View):
+
+            def get(self, request, *args, **kwargs):
+                return text('I am get method')
+
+            def put(self, request, *args, **kwargs):
+                return text('I am put method')
+    etc.
+    If someone try use not implemented method, there will be 405 response
+
+    If you need any url params just mention them in method definition like:
+        class DummyView(View):
+
+            def get(self, request, my_param_here, *args, **kwargs):
+                return text('I am get method with %s' % my_param_here)
+
+    To add the view into the routing you could use
+        1) app.add_route(DummyView(), '/')
+        2) app.route('/')(DummyView())
+    """
+
+    def __call__(self, request, *args, **kwargs):
+        handler = getattr(self, request.method.lower(), None)
+        if handler:
+            return handler(request, *args, **kwargs)
+        raise InvalidUsage(
+            'Method {} not allowed for URL {}'.format(
+                request.method, request.url), status_code=405)

tests/test_routes.py

@@ -84,7 +84,7 @@ def test_dynamic_route_int():
 
 
 def test_dynamic_route_number():
-    app = Sanic('test_dynamic_route_int')
+    app = Sanic('test_dynamic_route_number')
 
     results = []
 
@@ -105,7 +105,7 @@ def test_dynamic_route_number():
 
 
 def test_dynamic_route_regex():
-    app = Sanic('test_dynamic_route_int')
+    app = Sanic('test_dynamic_route_regex')
 
     @app.route('/folder/<folder_id:[A-Za-z0-9]{0,4}>')
     async def handler(request, folder_id):
@@ -145,7 +145,7 @@ def test_dynamic_route_unhashable():
 
 
 def test_route_duplicate():
-    app = Sanic('test_dynamic_route')
+    app = Sanic('test_route_duplicate')
 
     with pytest.raises(RouteExists):
         @app.route('/test')
@@ -178,3 +178,181 @@ def test_method_not_allowed():
 
     request, response = sanic_endpoint_test(app, method='post', uri='/test')
     assert response.status == 405
+
+
+def test_static_add_route():
+    app = Sanic('test_static_add_route')
+
+    async def handler1(request):
+        return text('OK1')
+
+    async def handler2(request):
+        return text('OK2')
+
+    app.add_route(handler1, '/test')
+    app.add_route(handler2, '/test2')
+
+    request, response = sanic_endpoint_test(app, uri='/test')
+    assert response.text == 'OK1'
+
+    request, response = sanic_endpoint_test(app, uri='/test2')
+    assert response.text == 'OK2'
+
+
+def test_dynamic_add_route():
+    app = Sanic('test_dynamic_add_route')
+
+    results = []
+
+    async def handler(request, name):
+        results.append(name)
+        return text('OK')
+
+    app.add_route(handler, '/folder/<name>')
+    request, response = sanic_endpoint_test(app, uri='/folder/test123')
+
+    assert response.text == 'OK'
+    assert results[0] == 'test123'
+
+
+def test_dynamic_add_route_string():
+    app = Sanic('test_dynamic_add_route_string')
+
+    results = []
+
+    async def handler(request, name):
+        results.append(name)
+        return text('OK')
+
+    app.add_route(handler, '/folder/<name:string>')
+    request, response = sanic_endpoint_test(app, uri='/folder/test123')
+
+    assert response.text == 'OK'
+    assert results[0] == 'test123'
+
+    request, response = sanic_endpoint_test(app, uri='/folder/favicon.ico')
+
+    assert response.text == 'OK'
+    assert results[1] == 'favicon.ico'
+
+
+def test_dynamic_add_route_int():
+    app = Sanic('test_dynamic_add_route_int')
+
+    results = []
+
+    async def handler(request, folder_id):
+        results.append(folder_id)
+        return text('OK')
+
+    app.add_route(handler, '/folder/<folder_id:int>')
+
+    request, response = sanic_endpoint_test(app, uri='/folder/12345')
+    assert response.text == 'OK'
+    assert type(results[0]) is int
+
+    request, response = sanic_endpoint_test(app, uri='/folder/asdf')
+    assert response.status == 404
+
+
+def test_dynamic_add_route_number():
+    app = Sanic('test_dynamic_add_route_number')
+
+    results = []
+
+    async def handler(request, weight):
+        results.append(weight)
+        return text('OK')
+
+    app.add_route(handler, '/weight/<weight:number>')
+
+    request, response = sanic_endpoint_test(app, uri='/weight/12345')
+    assert response.text == 'OK'
+    assert type(results[0]) is float
+
+    request, response = sanic_endpoint_test(app, uri='/weight/1234.56')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, uri='/weight/1234-56')
+    assert response.status == 404
+
+
+def test_dynamic_add_route_regex():
+    app = Sanic('test_dynamic_route_int')
+
+    async def handler(request, folder_id):
+        return text('OK')
+
+    app.add_route(handler, '/folder/<folder_id:[A-Za-z0-9]{0,4}>')
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test1')
+    assert response.status == 404
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test-123')
+    assert response.status == 404
+
+    request, response = sanic_endpoint_test(app, uri='/folder/')
+    assert response.status == 200
+
+
+def test_dynamic_add_route_unhashable():
+    app = Sanic('test_dynamic_add_route_unhashable')
+
+    async def handler(request, unhashable):
+        return text('OK')
+
+    app.add_route(handler, '/folder/<unhashable:[A-Za-z0-9/]+>/end/')
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test/asdf/end/')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test///////end/')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test/end/')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, uri='/folder/test/nope/')
+    assert response.status == 404
+
+
+def test_add_route_duplicate():
+    app = Sanic('test_add_route_duplicate')
+
+    with pytest.raises(RouteExists):
+        async def handler1(request):
+            pass
+
+        async def handler2(request):
+            pass
+
+        app.add_route(handler1, '/test')
+        app.add_route(handler2, '/test')
+
+    with pytest.raises(RouteExists):
+        async def handler1(request, dynamic):
+            pass
+
+        async def handler2(request, dynamic):
+            pass
+
+        app.add_route(handler1, '/test/<dynamic>/')
+        app.add_route(handler2, '/test/<dynamic>/')
+
+
+def test_add_route_method_not_allowed():
+    app = Sanic('test_add_route_method_not_allowed')
+
+    async def handler(request):
+        return text('OK')
+
+    app.add_route(handler, '/test', methods=['GET'])
+
+    request, response = sanic_endpoint_test(app, uri='/test')
+    assert response.status == 200
+
+    request, response = sanic_endpoint_test(app, method='post', uri='/test')
+    assert response.status == 405

tests/test_views.py

@@ -0,0 +1,155 @@
+from sanic import Sanic
+from sanic.response import text, HTTPResponse
+from sanic.views import HTTPMethodView
+from sanic.blueprints import Blueprint
+from sanic.request import Request
+from sanic.utils import sanic_endpoint_test
+
+
+def test_methods():
+    app = Sanic('test_methods')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+        def post(self, request):
+            return text('I am post method')
+
+        def put(self, request):
+            return text('I am put method')
+
+        def patch(self, request):
+            return text('I am patch method')
+
+        def delete(self, request):
+            return text('I am delete method')
+
+    app.add_route(DummyView(), '/')
+
+    request, response = sanic_endpoint_test(app, method="get")
+    assert response.text == 'I am get method'
+    request, response = sanic_endpoint_test(app, method="post")
+    assert response.text == 'I am post method'
+    request, response = sanic_endpoint_test(app, method="put")
+    assert response.text == 'I am put method'
+    request, response = sanic_endpoint_test(app, method="patch")
+    assert response.text == 'I am patch method'
+    request, response = sanic_endpoint_test(app, method="delete")
+    assert response.text == 'I am delete method'
+
+
+def test_unexisting_methods():
+    app = Sanic('test_unexisting_methods')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+    app.add_route(DummyView(), '/')
+    request, response = sanic_endpoint_test(app, method="get")
+    assert response.text == 'I am get method'
+    request, response = sanic_endpoint_test(app, method="post")
+    assert response.text == 'Error: Method POST not allowed for URL /'
+
+
+def test_argument_methods():
+    app = Sanic('test_argument_methods')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request, my_param_here):
+            return text('I am get method with %s' % my_param_here)
+
+    app.add_route(DummyView(), '/<my_param_here>')
+
+    request, response = sanic_endpoint_test(app, uri='/test123')
+
+    assert response.text == 'I am get method with test123'
+
+
+def test_with_bp():
+    app = Sanic('test_with_bp')
+    bp = Blueprint('test_text')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+    bp.add_route(DummyView(), '/')
+
+    app.blueprint(bp)
+    request, response = sanic_endpoint_test(app)
+
+    assert response.text == 'I am get method'
+
+
+def test_with_bp_with_url_prefix():
+    app = Sanic('test_with_bp_with_url_prefix')
+    bp = Blueprint('test_text', url_prefix='/test1')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+    bp.add_route(DummyView(), '/')
+
+    app.blueprint(bp)
+    request, response = sanic_endpoint_test(app, uri='/test1/')
+
+    assert response.text == 'I am get method'
+
+
+def test_with_middleware():
+    app = Sanic('test_with_middleware')
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+    app.add_route(DummyView(), '/')
+
+    results = []
+
+    @app.middleware
+    async def handler(request):
+        results.append(request)
+
+    request, response = sanic_endpoint_test(app)
+
+    assert response.text == 'I am get method'
+    assert type(results[0]) is Request
+
+
+def test_with_middleware_response():
+    app = Sanic('test_with_middleware_response')
+
+    results = []
+
+    @app.middleware('request')
+    async def process_response(request):
+        results.append(request)
+
+    @app.middleware('response')
+    async def process_response(request, response):
+        results.append(request)
+        results.append(response)
+
+    class DummyView(HTTPMethodView):
+
+        def get(self, request):
+            return text('I am get method')
+
+    app.add_route(DummyView(), '/')
+
+    request, response = sanic_endpoint_test(app)
+
+    assert response.text == 'I am get method'
+    assert type(results[0]) is Request
+    assert type(results[1]) is Request
+    assert issubclass(type(results[2]), HTTPResponse)