Adding source code files for Chapter 12

Chapter12/HTTP-cloud-function/main.py

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+from datetime import date, datetime
+
+def today_datatime(request):
+
+  request_json = request.get_json()
+  if request.args and 'requester' in request.args:
+    requster_name = request.args.get('requester')
+  elif request_json and 'requester' in request_json:
+    requster_name = request_json['requester']
+  else:
+    requster_name = f'anonymous'
+
+  today = date.today()
+  now = datetime.now()
+  resp = "{date:" + today.strftime("%B %d, %Y") + \
+      ", time: " + now.strftime("%H:%M:%S") + '}'
+  return f'Hello ' + requster_name + "! Here is today date and time:\n" + resp

Chapter12/HTTP-cloud-function/requirements.txt

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+#There is no dependency for this cloud function