Logging using after_request method & hydrus_logger added (#575)

* after_request method added.
* hydrus_logger & LogConfig file added.
* structlog dependency added.
* iri & status code added.
* reposition logger object.
* Log level set to python env variable
* Console deubug configured
* "Object_created_at : None" Fixed
* level fix

hydrus/LogConfig

@@ -0,0 +1,28 @@
+[loggers]
+keys=root
+
+[handlers]
+keys = FileHandler,StreamHandler
+
+[formatters]
+keys=simpleFormatter, ConsoleFormatter
+
+[logger_root]
+handlers=FileHandler, StreamHandler
+
+[handler_FileHandler]
+class=FileHandler
+args=('hydrus.log',)
+
+[handler_StreamHandler]
+class = StreamHandler
+
+formatter=ConsoleFormatter
+args=(sys.stdout,)
+
+[formatter_ConsoleFormatter]
+format=
+
+[formatter_simpleFormatter]
+format=%(asctime)s - %(name)s - %(levelname)s - %(message)s
+datefmt=

hydrus/app_factory.py

@@ -1,10 +1,13 @@
-from flask import Flask, redirect
+from flask import Flask, redirect, request
+import uuid
 from flask_cors import CORS
 from flask_restful import Api
-
+from hydrus_logger import HydrusLogger
 from hydrus.resources import (Index, Vocab, Contexts, Entrypoint,
                               ItemCollection, Item, Items, ItemMember)
 
+logger = HydrusLogger().get_logger()
+
 
 def app_factory(api_name: str = "api", vocab_route: str = "vocab") -> Flask:
     """
@@ -20,6 +23,16 @@ def app_factory(api_name: str = "api", vocab_route: str = "vocab") -> Flask:
     app.url_map.strict_slashes = False
     api = Api(app)
 
+    @app.after_request
+    def logging_request_response(response):
+        if response.location and response.status_code != 302:
+            logger.info(" {} {}:{} Object_created_at : {}, status_code : {} "
+                        .format(uuid.uuid4(), request.method, request.path, response.location, response.status))
+        else:
+            logger.info(" {} {}:{}  status_code : {} "
+                        .format(uuid.uuid4(), request.method, request.path, response.status))
+        return response
+
     # Redirecting root_path to root_path/api_name
     if api_name:
         @app.route("/")

hydrus/hydrus_logger.py

@@ -0,0 +1,15 @@
+import logging
+import logging.config
+import structlog
+import os
+
+class HydrusLogger:
+    def __init__(self):
+        logging.basicConfig(level = os.environ.get('LOGLEVEL', 'DEBUG'))
+        logging.config.fileConfig('LogConfig')
+        structlog.wrap_logger(logging.getLogger())
+        structlog.configure(logger_factory=structlog.stdlib.LoggerFactory())
+        self.logger = structlog.get_logger()
+
+    def get_logger(self):
+        return self.logger

requirements.txt

@@ -35,3 +35,4 @@ six==1.13.0
 SQLAlchemy==1.3.12
 thespian==3.9.11
 Werkzeug==0.16.0
+structlog