Add response documentation

docs/index.rst

@@ -9,6 +9,7 @@ Guides
    sanic/getting_started
    sanic/routing
    sanic/request_data
+   sanic/response
    sanic/static_files
    sanic/exceptions
    sanic/middleware

docs/sanic/response.md

@@ -0,0 +1,99 @@
+# Response
+
+Use functions in `sanic.response` module to create responses.
+
+- `text` - Plain text response
+
+```python
+from sanic import response
+
+
+@app.route('/text')
+def handle_request(request):
+    return response.text('Hello world!')
+```
+
+- `html` - HTML response
+
+```python
+from sanic import response
+
+
+@app.route('/html')
+def handle_request(request):
+    return response.html('<p>Hello world!</p>')
+```
+
+- `json` - JSON response
+
+
+```python
+from sanic import response
+
+
+@app.route('/json')
+def handle_request(request):
+    return response.json({'message': 'Hello world!'})
+```
+
+- `file` - File response
+
+```python
+from sanic import response
+
+
+@app.route('/file')
+async def handle_request(request):
+    return await response.file('/srv/www/whatever.png')
+```
+
+- `stream` - Streaming response
+
+```python
+from sanic import response
+
+@app.route("/streaming")
+async def index(request):
+    async def streaming_fn(response):
+        await response.write('foo')
+        await response.write('bar')
+    return response.stream(streaming_fn, content_type='text/plain')
+```
+
+- `redirect` - Redirect response
+
+```python
+from sanic import response
+
+
+@app.route('/redirect')
+def handle_request(request):
+    return response.redirect('/json')
+```
+
+- `raw` - Raw response, response without encoding the body
+
+```python
+from sanic import response
+
+
+@app.route('/raw')
+def handle_request(request):
+    return response.raw('raw data')
+```
+
+
+To modify headers or status code, pass the `headers` or `status` argument to those functions:
+
+```python
+from sanic import response
+
+
+@app.route('/json')
+def handle_request(request):
+    return response.json(
+        {'message': 'Hello world!'},
+        headers={'X-Served-By': 'sanic'},
+        status=200
+    )
+```