Add SSL to server

Add ssl variable passthrough to following:
-- sanic.run
-- server.serve
Add ssl variable to loop.create_server to enable built-in async context socket wrapper
Update documentation
Tested with worker = 1, and worker = 2.

Signed-off-by: Matt Daue <mattdaue@gmail.com>

README.md

@@ -49,6 +49,18 @@ if __name__ == "__main__":
 ## Installation
  * `python -m pip install sanic`
 
+## Use SSL
+ * Optionally pass in an SSLContext:
+```
+import ssl
+certificate = "/path/to/certificate"
+keyfile = "/path/to/keyfile"
+context = ssl.create_default_context(purpose=ssl.Purpose.CLIENT_AUTH)
+context.load_cert_chain(certificate, keyfile=keyfile)
+
+app.run(host="0.0.0.0", port=8443, ssl=context)
+```
+
 ## Documentation
  * [Getting started](docs/getting_started.md)
  * [Request Data](docs/request_data.md)

sanic/sanic.py

@@ -245,9 +245,9 @@ class Sanic:
     # -------------------------------------------------------------------- #
 
     def run(self, host="127.0.0.1", port=8000, debug=False, before_start=None,
-            after_start=None, before_stop=None, after_stop=None, sock=None,
-            workers=1, loop=None, protocol=HttpProtocol, backlog=100,
-            stop_event=None):
+            after_start=None, before_stop=None, after_stop=None, ssl=None,
+            sock=None, workers=1, loop=None, protocol=HttpProtocol,
+            backlog=100, stop_event=None):
         """
         Runs the HTTP Server and listens until keyboard interrupt or term
         signal. On termination, drains connections before closing.
@@ -262,6 +262,7 @@ class Sanic:
         received before it is respected
         :param after_stop: Functions to be executed when all requests are
         complete
+        :param ssl: SSLContext for SSL encryption of worker(s)
         :param sock: Socket for the server to accept connections from
         :param workers: Number of processes
         received before it is respected
@@ -278,6 +279,7 @@ class Sanic:
             'host': host,
             'port': port,
             'sock': sock,
+            'ssl': ssl,
             'debug': debug,
             'request_handler': self.handle_request,
             'error_handler': self.error_handler,
@@ -315,7 +317,11 @@ class Sanic:
         log.debug(self.config.LOGO)
 
         # Serve
-        log.info('Goin\' Fast @ http://{}:{}'.format(host, port))
+        if ssl is None:
+            proto = "http"
+        else:
+            proto = "https"
+        log.info('Goin\' Fast @ {}://{}:{}'.format(proto, host, port))
 
         try:
             if workers == 1:

sanic/server.py

@@ -225,7 +225,7 @@ def trigger_events(events, loop):
 
 def serve(host, port, request_handler, error_handler, before_start=None,
           after_start=None, before_stop=None, after_stop=None, debug=False,
-          request_timeout=60, sock=None, request_max_size=None,
+          request_timeout=60, ssl=None, sock=None, request_max_size=None,
           reuse_port=False, loop=None, protocol=HttpProtocol, backlog=100):
     """
     Starts asynchronous HTTP Server on an individual process.
@@ -243,6 +243,7 @@ def serve(host, port, request_handler, error_handler, before_start=None,
     received after it is respected. Takes single argumenet `loop`
     :param debug: Enables debug output (slows server)
     :param request_timeout: time in seconds
+    :param ssl: SSLContext
     :param sock: Socket for the server to accept connections from
     :param request_max_size: size in bytes, `None` for no limit
     :param reuse_port: `True` for multiple workers
@@ -275,6 +276,7 @@ def serve(host, port, request_handler, error_handler, before_start=None,
         server,
         host,
         port,
+        ssl=ssl,
         reuse_port=reuse_port,
         sock=sock,
         backlog=backlog