def __init__(self, reactor, config):
self.config = config
self.engine = get_engine(config['connection_string'], reactor)
self.metrics = ShortenerMetrics(reactor, config)
self.load_handlers()
def __init__(self, reactor, config):
self.config = config
self.engine = get_engine(config['connection_string'], reactor)
self.metrics = ShortenerMetrics(reactor, config)
self.load_handlers()
class ShortenerServiceApp(object):
def __init__(self, reactor, config):
self.config = config
self.engine = get_engine(config['connection_string'], reactor)
self.metrics = ShortenerMetrics(reactor, config)
self.load_handlers()
def load_handlers(self):
self.handlers = {}
for handler_config in self.config['handlers']:
[(name, class_path)] = handler_config.items()
parts = class_path.split('.')
module = '.'.join(parts[:-1])
class_name = parts[-1]
handler_module = __import__(module, fromlist=[class_name])
handler_class = getattr(handler_module, class_name)
handler = handler_class(self.config, self.engine)
self.handlers[name] = handler
@handler('/api/create', methods=['PUT'])
@inlineCallbacks
def create_url(self, request):
props = get_json_params(
request, ['long_url'], ['user_token'])
long_url = props['long_url']
user_token = props.get('user_token', None)
short_url = yield self.shorten_url(long_url, user_token)
yield request.setResponseCode(http.CREATED)
returnValue({'short_url': short_url})
@handler('/api/init', methods=['GET'])
@inlineCallbacks
def init_account(self, request):
'''
Initializes the account and creates the database tables
'''
conn = yield self.engine.connect()
account = self.config['account']
tables = ShortenerTables(account, conn)
try:
already_exists = yield tables.exists()
if not already_exists:
yield tables.create_tables()
finally:
yield conn.close()
returnValue({'created': not already_exists})
@handler('/api/handler/<string:handler_name>', methods=['GET'])
@inlineCallbacks
def run_handler(self, request, handler_name):
handler = self.handlers.get(handler_name)
if not handler:
request.setResponseCode(http.NOT_FOUND)
returnValue({})
else:
response = yield handler.render(request)
returnValue(response)
@handler('/<string:short_url>', methods=['GET'])
@inlineCallbacks
def resolve_url(self, request, short_url):
row = yield self.get_row_by_short_url(short_url)
if row and row['long_url']:
request.setResponseCode(http.MOVED_PERMANENTLY)
request.setHeader(b"location", row['long_url'].encode('utf-8'))
yield self.metrics.publish_expanded_url_metrics()
else:
request.setResponseCode(http.NOT_FOUND)
yield self.metrics.publish_invalid_url_metrics()
returnValue({})
@inlineCallbacks
def shorten_url(self, long_url, user_token=None):
if not user_token:
user_token = DEFAULT_USER_TOKEN
row = yield self.get_or_create_row(long_url, user_token)
short_url = row['short_url']
if not row['short_url']:
short_url = generate_token(row['id'])
yield self.update_short_url(row['id'], short_url)
yield self.metrics.publish_created_url_metrics()
returnValue(urljoin(self.config['host_domain'], short_url))
@inlineCallbacks
def get_or_create_row(self, url, user_token):
account = self.config['account']
domain = urlparse(url).netloc
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
row = yield tables.get_or_create_row(
domain,
user_token,
url
)
returnValue(row)
except NoShortenerTables:
raise APIError('Account "%s" does not exist' % account, 200)
finally:
yield conn.close()
@inlineCallbacks
def update_short_url(self, row_id, short_url):
account = self.config['account']
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
yield tables.update_short_url(row_id, short_url)
finally:
yield conn.close()
@inlineCallbacks
def get_row_by_short_url(self, short_url):
account = self.config['account']
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
row = yield tables.get_row_by_short_url(short_url)
returnValue(row)
finally:
yield conn.close()
class ShortenerServiceApp(object):
def __init__(self, reactor, config):
self.config = config
self.engine = get_engine(config['connection_string'], reactor)
self.metrics = ShortenerMetrics(reactor, config)
self.load_handlers()
def load_handlers(self):
self.handlers = {}
for handler_config in self.config['handlers']:
[(name, class_path)] = handler_config.items()
parts = class_path.split('.')
module = '.'.join(parts[:-1])
class_name = parts[-1]
handler_module = __import__(module, fromlist=[class_name])
handler_class = getattr(handler_module, class_name)
handler = handler_class(self.config, self.engine)
self.handlers[name] = handler
@handler('/api/create', methods=['PUT'])
@inlineCallbacks
def create_url(self, request):
props = get_json_params(request, ['long_url'], ['user_token'])
long_url = props['long_url']
user_token = props.get('user_token', None)
short_url = yield self.shorten_url(long_url, user_token)
yield request.setResponseCode(http.CREATED)
returnValue({'short_url': short_url})
@handler('/api/init', methods=['GET'])
@inlineCallbacks
def init_account(self, request):
'''
Initializes the account and creates the database tables
'''
conn = yield self.engine.connect()
account = self.config['account']
tables = ShortenerTables(account, conn)
try:
already_exists = yield tables.exists()
if not already_exists:
yield tables.create_tables()
finally:
yield conn.close()
returnValue({'created': not already_exists})
@handler('/api/handler/<string:handler_name>', methods=['GET'])
@inlineCallbacks
def run_handler(self, request, handler_name):
handler = self.handlers.get(handler_name)
if not handler:
request.setResponseCode(http.NOT_FOUND)
returnValue({})
else:
response = yield handler.render(request)
returnValue(response)
@handler('/<string:short_url>', methods=['GET'])
@inlineCallbacks
def resolve_url(self, request, short_url):
row = yield self.get_row_by_short_url(short_url)
if row and row['long_url']:
request.setResponseCode(http.MOVED_PERMANENTLY)
request.setHeader(b"location", row['long_url'].encode('utf-8'))
yield self.metrics.publish_expanded_url_metrics()
else:
request.setResponseCode(http.NOT_FOUND)
yield self.metrics.publish_invalid_url_metrics()
returnValue({})
@inlineCallbacks
def shorten_url(self, long_url, user_token=None):
if not user_token:
user_token = DEFAULT_USER_TOKEN
row = yield self.get_or_create_row(long_url, user_token)
short_url = row['short_url']
if not row['short_url']:
short_url = generate_token(row['id'])
yield self.update_short_url(row['id'], short_url)
yield self.metrics.publish_created_url_metrics()
returnValue(urljoin(self.config['host_domain'], short_url))
@inlineCallbacks
def get_or_create_row(self, url, user_token):
account = self.config['account']
domain = urlparse(url).netloc
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
row = yield tables.get_or_create_row(domain, user_token, url)
returnValue(row)
except NoShortenerTables:
raise APIError('Account "%s" does not exist' % account, 200)
finally:
yield conn.close()
@inlineCallbacks
def update_short_url(self, row_id, short_url):
account = self.config['account']
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
yield tables.update_short_url(row_id, short_url)
finally:
yield conn.close()
@inlineCallbacks
def get_row_by_short_url(self, short_url):
account = self.config['account']
conn = yield self.engine.connect()
try:
tables = ShortenerTables(account, conn)
row = yield tables.get_row_by_short_url(short_url)
returnValue(row)
finally:
yield conn.close()