Updating Python hot HTTP/JSON sample (#379)

* Updating Python hot HTTP sample

 - using latest hotfn 0.0.5 release (made life lot easier)

* Updating to latest 0.0.6 release

 What's new?
 - new request data signature: context, data, loop
 - supports event loop (very useful for request body handeler of coroutine type)

* Updating example with respect to recent fdk-python release

* Addressing review comments

examples/formats/http/python/Dockerfile

@@ -1,8 +0,0 @@
-FROM python:3.6.2
-
-RUN mkdir /code
-ADD . /code/
-WORKDIR /code
-RUN pip3 install -r requirements.txt
-
-ENTRYPOINT ["python3", "func.py"]

examples/formats/http/python/func.py

@@ -1,42 +1,21 @@
-import asyncio
-import sys
-import uvloop
-
-from hotfn.http import request
-from hotfn.http import response
+import fdk
 
 
-class MyProtocol(asyncio.Protocol):
-
-    def connection_made(self, transport):
-        print('pipe opened', file=sys.stderr, flush=True)
-        super(MyProtocol, self).connection_made(transport=transport)
-
-    def data_received(self, data):
-        print('received: {!r}'.format(data), file=sys.stderr, flush=True)
-        data = data.decode()
-        req = request.RawRequest(data)
-        (method, url, dict_params,
-         headers, http_version, req_data) = req.parse_raw_request()
-
-        rs = response.RawResponse(
-            http_version, 200, "OK",
-            response_data=req_data)
-        print(rs.dump(), file=sys.stdout, flush=True)
-        super(MyProtocol, self).data_received(data)
-
-    def connection_lost(self, exc):
-        print('pipe closed', file=sys.stderr, flush=True)
-        super(MyProtocol, self).connection_lost(exc)
+@fdk.coerce_http_input_to_content_type
+def app(context, data=None, loop=None):
+    """
+    User's request body handler
+    :param context: request context
+    :type context: hotfn.http.request.RequestContext
+    :param data: request body, it's type depends on request Content-Type header
+    :type data: object
+    :param loop: asyncio event loop
+    :type loop asyncio.AbstractEventLoop
+    :return: echo of data
+    :rtype: object
+    """
+    return data
 
 
 if __name__ == "__main__":
-    with open("/dev/stdin", "rb", buffering=0) as stdin:
-        asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
-        loop = asyncio.get_event_loop()
-        try:
-            stdin_pipe_reader = loop.connect_read_pipe(MyProtocol, stdin)
-            loop.run_until_complete(stdin_pipe_reader)
-            loop.run_forever()
-        finally:
-            loop.close()
+    fdk.handle(app)

examples/formats/http/python/func.yaml

@@ -1,6 +1,6 @@
 name: fnproject/hot-http-python
 version: 0.0.1
-runtime: docker
+runtime: python3.6.2
 type: sync
 memory: 521
 format: http

examples/formats/http/python/requirements.txt

@@ -1,2 +1,2 @@
-hotfn
-uvloop
+fdk==0.0.1
+uvloop==0.8.1

examples/formats/json/python/func.py

@@ -0,0 +1,20 @@
+import fdk
+
+
+def handler(context, data=None, loop=None):
+    """
+    This is just an echo function
+    :param context: request context
+    :type context: hotfn.http.request.RequestContext
+    :param data: request body
+    :type data: object
+    :param loop: asyncio event loop
+    :type loop: asyncio.AbstractEventLoop
+    :return: echo of request body
+    :rtype: object
+    """
+    return data
+
+
+if __name__ == "__main__":
+    fdk.handle(handler)

examples/formats/json/python/func.yaml

@@ -0,0 +1,7 @@
+name: fnproject/hot-json-python
+version: 0.0.1
+runtime: python3.6.2
+type: sync
+memory: 256
+format: json
+path: /hot-json-python

examples/formats/json/python/requirements.txt

@@ -0,0 +1 @@
+fdk==0.0.1