Making bottle base requests size configurable

Earlier bottle.BaseRequest.MEMFILE_MAX was hard coded to 1024000 in
vnc_cfg_api_server.py.
Adding config. parameter "max_request_size" to enable setting of
bottle.BaseRequest.MEMFILE_MAX through contrail-api.conf file.

Change-Id: If9d11d5f0856701ab7db71d55383d7f01f9abda7
Closes-Bug: #1701093

src/config/api-server/contrail-api.conf

@@ -7,6 +7,8 @@ log_local = 1
 cassandra_server_list = 127.0.0.1:9160
 disc_server_ip = 127.0.0.1
 disc_server_port = 5998
+# To set bottle.BaseRequest.MEMFILE_MAX
+# max_request_size = 1024000
 
 # (StrOpt) default encoding to use for string resources.
 # this is optional variable. Define it if you want to override

src/config/api-server/utils.py

@@ -96,6 +96,7 @@ def parse_args(args_str):
         'ifmap_queue_size': 10000,
         'ifmap_max_message_size': 1024*1024,
         'ifmap_health_check_interval': '60', # in seconds
+        'max_request_size': 1024000,
     }
     # ssl options
     secopts = {
@@ -340,6 +341,8 @@ def parse_args(args_str):
     parser.add_argument('--ifmap_credentials',
                         help="List of user and password: <username:password>",
                         type=user_password, nargs='*')
+    parser.add_argument("--max_request_size", type=int,
+            help="Maximum size of bottle requests served by api server")
     args_obj, remaining_argv = parser.parse_known_args(remaining_argv)
     args_obj.conf_file = args.conf_file
     args_obj.config_sections = config

src/config/api-server/vnc_cfg_api_server.py

@@ -57,7 +57,6 @@
 CONFIG_VERSION = '1.0'
 
 import bottle
-bottle.BaseRequest.MEMFILE_MAX = 1024000
 
 import utils
 import context
@@ -1352,6 +1351,9 @@ def __init__(self, args_str=None):
             args_str = ' '.join(sys.argv[1:])
         self._parse_args(args_str)
 
+        # set the max size of the api requests
+        bottle.BaseRequest.MEMFILE_MAX = self._args.max_request_size
+
         # aaa-mode is ignored if multi_tenancy is configured by user
         if self._args.multi_tenancy is None:
             # MT unconfigured by user - determine from aaa-mode
@@ -2655,6 +2657,7 @@ def _parse_args(self, args_str):
                                          --ifmap_listen_ip 0.0.0.0
                                          --ifmap_listen_port 8443
                                          --ifmap_credentials control:secret
+                                         --max_request_size 1024000
         '''
         self._args, _ = utils.parse_args(args_str)
     # end _parse_args