Seed code for yarf

[ta/yarf.git] / src / yarf / restfulargs.py

diff --git a/src/yarf/restfulargs.py b/src/yarf/restfulargs.py
new file mode 100644 (file)
index 0000000..5624b5c
--- /dev/null
+++ b/src/yarf/restfulargs.py
@@ -0,0 +1,119 @@
+# Copyright 2019 Nokia
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import argparse
+import sys
+
+import yarf.config_defaults as config_defaults
+import yarf.restfullogger as restfullogger
+
+from yarf.iniloader import INILoader
+from yarf.exceptions import ConfigError
+
+
+def exception_handler(func):
+    def exception_wrapper(*args, **kwargs):
+        try:
+            restlogger = restfullogger.get_logger()
+            restlogger.debug("calling {}".format(func.__name__))
+            ret = func(*args, **kwargs)
+            return ret
+        except Exception as error:
+            restlogger.info("Exception from function {} (error: {})".format(func.__name__, str(error)))
+            if isinstance(error, ConfigError):
+                raise error
+            else:
+                raise ConfigError(str(error))
+    return exception_wrapper
+
+
+class RestConfig(object):
+    __restinstance = None
+
+    def __new__(cls):
+        if RestConfig.__restinstance is None:
+            RestConfig.__restinstance = object.__new__(cls)
+        return RestConfig.__restinstance
+
+    def __init__(self):
+        self.default_section = config_defaults.default_section
+        self.config_default = config_defaults.config_defaults
+        self.default_config_file = config_defaults.default_config_file
+
+        self.config = None
+        self.config_file = None
+
+    @exception_handler
+    def parse(self, args=sys.argv[1:]):
+        parser = argparse.ArgumentParser(description='Restful server')
+        parser.add_argument('--config',
+                            type=str,
+                            default=self.default_config_file,
+                            help="Configuration file",
+                            dest='config_file')
+
+        args = parser.parse_args(args)
+        self.config_file = args.config_file
+        self.config = INILoader(self.config_file, defaults=self.config_default, defaultsection=self.default_section)
+
+    @exception_handler
+    def get_port(self):
+        return self.config.get('port', type_of_value=int)
+
+    @exception_handler
+    def get_ip(self):
+        return self.config.get('ip_address')
+
+    @exception_handler
+    def use_ssl(self):
+        return self.config.get('use_ssl', type_of_value=bool)
+
+    @exception_handler
+    def get_private_key(self):
+        if self.use_ssl():
+            return self.config.get('ssl_private_key')
+        return None
+
+    @exception_handler
+    def get_certificate(self):
+        if self.use_ssl():
+            return self.config.get('ssl_certificate')
+        return None
+
+    @exception_handler
+    def get_handler_dir(self):
+        return self.config.get('handler_directory')
+
+    def get_section(self, section, format='list'):
+        return self.config.get_section(section, format=format)
+
+    def get_debug(self):
+        return self.config.get('debug', type_of_value=bool)
+
+    @exception_handler
+    def get_passthrough_errors(self):
+        return self.config.get('passthrough_errors', type_of_value=bool)
+
+    @exception_handler
+    def is_threaded(self):
+        return self.config.get('threaded', type_of_value=bool)
+
+    @exception_handler
+    def get_auth_method(self):
+        return self.config.get('auth_method')
+
+
+def get_config():
+    return RestConfig()