Support python function input

For example:
http POST http://127.0.0.1:7070/v1/executions function_id=<FUNCTION_ID> input:='{"param1": "value1"}' X-Auth-Token:<TOKEN>

Change-Id: I04ead79c22ead5720eaab58f456568a7ed9b23b4

README.rst

@@ -181,7 +181,7 @@ runtime/function/execution in Qinling.
             main()
         EOF
       $ pip install requests -t ~/qinling_test
-      $ zip ~/qinling_test/qinling_test.zip ~/qinling_test/*
+      $ zip -r ~/qinling_test/qinling_test.zip ~/qinling_test/*
 
    .. end
 

qinling/api/controllers/v1/execution.py

@@ -76,11 +76,12 @@ class ExecutionsController(rest.RestController):
 
             db_model = db_api.create_execution(params)
 
-        self.engine_client.create_execution(
-            db_model.id, function_id, runtime_id,
-            input=params.get('input'),
-            is_sync=is_sync
-        )
+        if not func_url:
+            self.engine_client.create_execution(
+                db_model.id, function_id, runtime_id,
+                input=params.get('input'),
+                is_sync=is_sync
+            )
 
         if is_sync:
             db_model = db_api.get_execution(db_model.id)

runtimes/python2/README.md

@@ -12,7 +12,7 @@ in their function packages through Qinling API or CLI.
 You'll need access to a Docker registry to push the image, by default it's
 docker hub. After modification, build a new image and upload to docker hub:
 
-    docker build -t USER/python-runtime. && docker push USER/python-runtime
+    docker build -t USER/python-runtime . && docker push USER/python-runtime
 
 
 ## Using the image in Qinling

runtimes/python2/server.py

@@ -33,7 +33,7 @@ file_name = ''
 def download():
     download_url = request.form['download_url']
     function_id = request.form['function_id']
-    token = request.form['token']
+    token = request.form.get('token')
 
     headers = {}
     if token:
@@ -67,9 +67,17 @@ def execute():
     importer = zipimport.zipimporter(file_name)
     module = importer.load_module('main')
 
+    input = {}
+    if request.form:
+        # Refer to:
+        # http://werkzeug.pocoo.org/docs/0.12/datastructures/#werkzeug.datastructures.MultiDict
+        input = request.form.to_dict()
+
+    app.logger.debug('Invoking function with input: %s' % input)
+
     start = time.time()
     try:
-        result = module.main()
+        result = module.main(**input)
     except Exception as e:
         result = str(e)