From d93dd02b6bf15de5dbca5848d44c7a1875f417d1 Mon Sep 17 00:00:00 2001
From: Davide Alberani <da@erlug.linux.it>
Date: Tue, 16 Jan 2018 20:54:56 +0100
Subject: [PATCH] tornado app base

---
 diffido.py | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 126 insertions(+), 1 deletion(-)

diff --git a/diffido.py b/diffido.py
index fbacf7f..0b036a4 100755
--- a/diffido.py
+++ b/diffido.py
@@ -1,19 +1,144 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+import os
+import logging
+
 from tornado.ioloop import IOLoop
-from lxml.html.diff import htmldiff
+# from lxml.html.diff import htmldiff
 from apscheduler.schedulers.tornado import TornadoScheduler
 from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
 
+import tornado.httpserver
+import tornado.ioloop
+import tornado.options
+from tornado.options import define, options
+import tornado.web
+from tornado import gen, escape
+
 CONF_DIR = ''
 JOBS_STORE = 'sqlite:///jobs.db'
+API_VERSION = '1.0'
+
+
+class DiffidoBaseException(Exception):
+    """Base class for diffido custom exceptions.
+
+    :param message: text message
+    :type message: str
+    :param status: numeric http status code
+    :type status: int"""
+    def __init__(self, message, status=400):
+        super(DiffidoBaseException, self).__init__(message)
+        self.message = message
+        self.status = status
+
+
+class BaseHandler(tornado.web.RequestHandler):
+    """Base class for request handlers."""
+    # Cache currently connected users.
+    _users_cache = {}
+
+    # set of documents we're managing (a collection in MongoDB or a table in a SQL database)
+    document = None
+    collection = None
+
+    # A property to access the first value of each argument.
+    arguments = property(lambda self: dict([(k, v[0].decode('utf-8'))
+                                            for k, v in self.request.arguments.items()]))
+
+    @property
+    def clean_body(self):
+        """Return a clean dictionary from a JSON body, suitable for a query on MongoDB.
+
+        :returns: a clean copy of the body arguments
+        :rtype: dict"""
+        return escape.json_decode(self.request.body or '{}')
+
+    def write_error(self, status_code, **kwargs):
+        """Default error handler."""
+        if isinstance(kwargs.get('exc_info', (None, None))[1], DiffidoBaseException):
+            exc = kwargs['exc_info'][1]
+            status_code = exc.status
+            message = exc.message
+        else:
+            message = 'internal error'
+        self.build_error(message, status=status_code)
+
+    def is_api(self):
+        """Return True if the path is from an API call."""
+        return self.request.path.startswith('/v%s' % API_VERSION)
+
+    def initialize(self, **kwargs):
+        """Add every passed (key, value) as attributes of the instance."""
+        for key, value in kwargs.items():
+            setattr(self, key, value)
+
+    def build_error(self, message='', status=400):
+        """Build and write an error message.
+
+        :param message: textual message
+        :type message: str
+        :param status: HTTP status code
+        :type status: int
+        """
+        self.set_status(status)
+        self.write({'error': True, 'message': message})
+
+
+class RootHandler(BaseHandler):
+    """Handler for the / path."""
+    app_path = os.path.join(os.path.dirname(__file__), "dist")
+
+    @gen.coroutine
+    def get(self, *args, **kwargs):
+        # serve the ./dist/index.html file
+        with open(self.app_path + "/index.html", 'r') as fd:
+            self.write(fd.read())
 
 
 def serve():
     jobstores = {'default': SQLAlchemyJobStore(url=JOBS_STORE)}
     scheduler = TornadoScheduler(jobstores=jobstores)
     scheduler.start()
+
+    define("port", default=3210, help="run on the given port", type=int)
+    define("address", default='', help="bind the server at the given address", type=str)
+    define("ssl_cert", default=os.path.join(os.path.dirname(__file__), 'ssl', 'diffido_cert.pem'),
+            help="specify the SSL certificate to use for secure connections")
+    define("ssl_key", default=os.path.join(os.path.dirname(__file__), 'ssl', 'diffido_key.pem'),
+            help="specify the SSL private key to use for secure connections")
+    define("debug", default=False, help="run in debug mode")
+    define("config", help="read configuration file",
+            callback=lambda path: tornado.options.parse_config_file(path, final=False))
+    tornado.options.parse_command_line()
+
+    logger = logging.getLogger()
+    logger.setLevel(logging.INFO)
+    if options.debug:
+        logger.setLevel(logging.DEBUG)
+
+    ssl_options = {}
+    if os.path.isfile(options.ssl_key) and os.path.isfile(options.ssl_cert):
+        ssl_options = dict(certfile=options.ssl_cert, keyfile=options.ssl_key)
+
+    init_params = dict(listen_port=options.port, logger=logger, ssl_options=ssl_options)
+
+    # _days_path = r"/days/?(?P<day>[\d_-]+)?"
+    application = tornado.web.Application([
+            # (_days_path, DaysHandler, init_params),
+            # (r'/v%s%s' % (API_VERSION, _days_path), DaysHandler, init_params),
+            (r"/(?:index.html)?", RootHandler, init_params),
+            (r'/?(.*)', tornado.web.StaticFileHandler, {"path": "dist"})
+        ],
+        static_path=os.path.join(os.path.dirname(__file__), "dist/static"),
+        debug=options.debug)
+    http_server = tornado.httpserver.HTTPServer(application, ssl_options=ssl_options or None)
+    logger.info('Start serving on %s://%s:%d', 'https' if ssl_options else 'http',
+                                                 options.address if options.address else '127.0.0.1',
+                                                 options.port)
+    http_server.listen(options.port, options.address)
+
     try:
         IOLoop.instance().start()
     except (KeyboardInterrupt, SystemExit):