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controller.py
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controller.py
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#!/usr/bin/env python
#! coding: utf-8
import sys, os
sys.path.append(os.path.dirname(__file__))
from datetime import datetime
from lib.cache import KeyValueDatabase
from lib.tornado import wsgi, httpserver, ioloop
from lib.text_processing import pretty_xml
from settings import api_db
from api.error import Error
from api.dictionary import Dictionary
from api.authentication import Authentication
from api.course import Course
import time
import urllib
# Use UTF-8 for output
reload(sys)
sys.setdefaultencoding('utf-8') # IGNORE:E1101
#----- description text with last update -----
## check .py file in api folder and this file to detect last_update
last_update = []
for i in os.listdir('api'):
s = os.stat(os.path.join('api', i))
_last_update = s.st_mtime
last_update.append(_last_update)
s = os.stat(__file__)
_last_update = s.st_mtime
last_update.append(_last_update)
last_update = time.strftime("%d-%m-%Y", time.localtime(max(last_update)))
#----- Description Header ------
__description__ = '<api version="0.9.1" last_update="%s">' % (last_update)
__description__ = __description__ + '%s</api>'
#----- Global Parameters -----
API_DB = KeyValueDatabase(api_db)
API_KEY = 'c74df88f0b1db2e4f48fdc4903851d41'
status = '200 OK'
#----- Map URI to functions ------
class URIMapper:
def __init__(self):
self.dict = Dictionary()
self.authen = Authentication()
self.course = Course()
self.error = Error()
def execute(self, environ):
path = environ['PATH_INFO']
#----- dictionary group -----
if path.startswith('/lookup:'):
return self.dict.lookup(environ)
#----- authentication group -----
elif path.startswith('/register:'):
return self.authen.register(environ)
elif path.startswith('/login:'):
return self.authen.login(environ)
elif path.startswith('/logout:'):
return self.authen.logout(environ)
#----- learning group -----
elif path.startswith('/levels:'):
return self.course.levels(environ)
elif path.startswith('/lessons:'):
return self.course.lessons(environ)
elif path.startswith('/listen:'):
return self.course.listen(environ)
else:
return self.error.bad_request()
#----- API Controller -----
class Handler:
"""Bộ điều khiển truy vấn và xác thực qua API.
Các API key được quản lý qua công cụ api_manager trong gói admin kèm trong
mã nguồn.
Theo mặc định, API key chỉ có duy nhất 1 và không giới hạn lượt truy cập và
độ trễ giữa mỗi lần truy câp.
"""
def __init__(self):
self.m = URIMapper()
self.error = Error()
def _parse_request(self, path):
try:
info = path.split(':')
request = info[1][:-1].replace("'&", '"&') # Normalize
params = {}
for keyword in request.split('"&'):
pair = keyword.split("=")
params[pair[0]] = urllib.unquote(pair[1][1:])
return params
except:
return 400 # Bad request
def request_handler(self, environ, start_response):
try:
# check method
if environ['REQUEST_METHOD'] != 'GET':
info = '<error status_code="405" \
description="Phương thức này không được hệ thống hỗ trợ"/>'
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(info)))]
start_response(status, response_headers)
return [info]
#-- get uri --
path = environ['PATH_INFO'].lstrip('/')
path = urllib.unquote(path)
# some tweak :-)
if path == 'favicon.ico':
response_headers = [('Content-type', 'text/xml'),
('Content-Length', 0)]
start_response(status, response_headers)
return ['']
if path.startswith('about'):
info = """<about author="AloneRoad"
full_name="Phạm Tuấn Anh"
email="AloneRoad@Gmail.com"
mobile_phone="+84 167 345 0 799"
message="Cảm ơn vì đã quan tâm ⍣ "/>"""
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(info)))]
start_response(status, response_headers)
return [info]
#------ for documents------
elif path == '': # return api developer's guide
doc = open(os.path.join(os.path.dirname(__file__),
'doc/build/html/index.html')).read()
response_headers = [('Content-type', 'text/html'),
('Content-Length', str(len(doc)))]
start_response(status, response_headers)
return [doc]
elif path in ['_static/nature.css',
'_static/pygments.css',
'_static/basic.css']:
doc = open(os.path.join(os.path.dirname(__file__),
'doc/build/html/', path)).read()
response_headers = [('Content-type', 'text/css'),
('Content-Length', str(len(doc)))]
start_response(status, response_headers)
return [doc]
elif path in ['_static/jquery.js',
'_static/doctools.js',
'_static/jquery.js']:
doc = open(os.path.join(os.path.dirname(__file__),
'doc/build/html/', path)).read()
response_headers = [('Content-type', 'text/javascript'),
('Content-Length', str(len(doc)))]
start_response(status, response_headers)
return [doc]
#----- end developer's guide -----
#----- get remote ip -----
ip_request = environ['REMOTE_ADDR']
ip_key = 'api::address="%s"?last_request' % ip_request
_time = datetime.now()
last_request = API_DB.get(ip_key) # get info
if last_request:
last_request = datetime.strptime(last_request, '%Y-%m-%d %H:%M:%S.%f')
else:
last_request = _time
API_DB.set(ip_key, str(_time)) # set new info
#----- Parse request -----
_params = self._parse_request(path)
if _params == 400:
xml = """<error status_code="400"
description="Yêu cầu không hợp lệ"/>"""
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
else:
try:
key = 'api::api_key="%s"?last_call' % (_params['api_key'])
except KeyError:
xml = self.error.authen_error("Thiếu api_key")
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
API_DB.set(key, _time)
total_key = 'api::api_key="%s"?total_request_per_day' % (_params['api_key'])
total = API_DB.get(total_key)
if total is None:
xml = """<error status_code="401"
description="api_key không hợp lệ"/>"""
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
delay_key = 'api::api_key="%s"?delay' % (_params['api_key'])
limit = API_DB.get(delay_key)
total_call_key = 'api::api_key="%s"?total_call' % (_params['api_key'])
total_call = API_DB.get(total_call_key)
delta = _time - last_request
if delta.days != 0:
API_DB.set(total_call_key, 0)
# Check sum requests
if int(total_call) >= int(total) and int(total) != 0:
message = """
api_key này chỉ được phép sử dụng %s lần một ngày
""" % total
xml = """
<error status_code="403" description="%s"/>
""" % message
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
# Limit time per request
elif (delta.seconds * 1e6 + delta.microseconds) < limit:
message = """
Khoảng thời gian tối thiểu giữa 2 lần request phải lớn hơn %s mili-giây
""" % (limit / 1000)
xml = """
<error status_code="403" description="%s"/>
""" % message
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
else: # accept request
API_DB.set(total_call_key, int(total_call) + 1) # incr total call
environ['request'] = self._parse_request(path)
xml = self.m.execute(environ)
xml = __description__ % xml
xml = pretty_xml(xml)
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
# Debug off | (on when KeyboardInterrupt)
except KeyboardInterrupt: # pylint: disable-msg=W0702
message = """
Hệ thống gặp một lỗi chưa rõ nguyên nhân.
Vui lòng báo lại cho bộ phận quản trị nếu gặp thông báo này
"""
xml = """
<error status_code="500" description="%s"/>
""" % message
xml = __description__ % xml
response_headers = [('Content-type', 'text/xml'),
('Content-Length', str(len(xml)))]
start_response(status, response_headers)
return [xml]
if __name__ == '__main__':
try:
port = int(sys.argv[1])
except:
print """
Sử dụng: python controller.py port
Ví dụ:
python controller.py 8000
"""
sys.exit()
container = wsgi.WSGIContainer(Handler().request_handler)
http_server = httpserver.HTTPServer(container)
http_server.listen(port)
ioloop.IOLoop.instance().start()