import logging
import os
import re
import requests
import socket
import time
import geoip2.database
from geopy.geocoders import Nominatim
import jinja2
from gevent.wsgi import WSGIServer
from gevent.monkey import patch_all
from gevent.subprocess import Popen, PIPE
patch_all()
from flask import Flask, request, render_template, send_from_directory
app = Flask(__name__)
MYDIR = os.environ.get('WTTR_MYDIR', os.path.abspath(os.path.dirname( os.path.dirname('__file__') )))
GEOLITE = os.environ.get('WTTR_GEOLITE', os.path.join( MYDIR, "GeoLite2-City.mmdb" ))
WEGO = os.environ.get('WTTR_WEGO', "/home/igor/go/bin/wego")
CACHEDIR = os.path.join( MYDIR, "cache" )
IP2LCACHE = os.path.join( MYDIR, "cache/ip2l" )
ALIASES = os.path.join( MYDIR, "share/aliases" )
ANSI2HTML = os.path.join( MYDIR, "share/ansi2html.sh" )
HELP_FILE = os.path.join( MYDIR, 'share/help.txt' )
LOG_FILE = os.path.join( MYDIR, 'log/main.log' )
TEMPLATES = os.path.join( MYDIR, 'share/templates' )
STATIC = os.path.join( MYDIR, 'share/static' )
NOT_FOUND_LOCATION = "NOT_FOUND"
DEFAULT_LOCATION = "Oymyakon"
NOT_FOUND_MESSAGE = """
We were unable to find your location,
so we have brought you to Oymyakon,
one of the coldest permanently inhabited locales on the planet.
"""
if not os.path.exists(os.path.dirname( LOG_FILE )):
os.makedirs( os.path.dirname( LOG_FILE ) )
logging.basicConfig(filename=LOG_FILE, level=logging.DEBUG)
reader = geoip2.database.Reader(GEOLITE)
geolocator = Nominatim()
my_loader = jinja2.ChoiceLoader([
app.jinja_loader,
jinja2.FileSystemLoader(TEMPLATES),
])
app.jinja_loader = my_loader
class Limits:
def __init__( self ):
self.intervals = [ 'min', 'hour', 'day' ]
self.divisor = {
'min': 60,
'hour': 3600,
'day': 86400,
}
self.counter = {
'min': {},
'hour': {},
'day': {},
}
self.limit = {
'min': 10,
'hour': 20,
'day': 100,
}
self.last_update = {
'min': 0,
'hour': 0,
'day': 0,
}
self.clear_counters()
def check_ip( self, ip ):
self.clear_counters()
for interval in self.intervals:
if ip not in self.counter[interval]:
self.counter[interval][ip] = 0
self.counter[interval][ip] += 1
if self.limit[interval] <= self.counter[interval][ip]:
log("Too many queries: %s in %s for %s" % (self.limit[interval], interval, ip) )
raise RuntimeError("Not so fast! Number of queries per %s is limited to %s" % (interval, self.limit[interval]))
print self.counter
def clear_counters( self ):
t = int( time.time() )
for interval in self.intervals:
if t / self.divisor[interval] != self.last_update[interval]:
self.counter[interval] = {}
self.last_update[interval] = t / self.divisor[interval]
limits = Limits()
def error( text ):
print text
raise RuntimeError(text)
def log( text ):
print text
logging.info( text )
def is_ip( ip ):
if re.match('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}', ip) is None:
return False
try:
socket.inet_aton(ip)
return True
except socket.error:
return False
def save_weather_data( location, filename ):
if location == NOT_FOUND_LOCATION:
location_not_found = True
location = DEFAULT_LOCATION
else:
location_not_found = False
p = Popen( [ WEGO, '-location=%s' % location ], stdout=PIPE, stderr=PIPE )
stdout, stderr = p.communicate()
if p.returncode != 0:
error( stdout + stderr )
dirname = os.path.dirname( filename )
if not os.path.exists( dirname ):
os.makedirs( dirname )
if location_not_found:
stdout += NOT_FOUND_MESSAGE
open( filename, 'w' ).write( stdout )
p = Popen( [ "bash", ANSI2HTML, "--palette=solarized", "--bg=dark" ], stdin=PIPE, stdout=PIPE, stderr=PIPE )
stdout, stderr = p.communicate( stdout )
if p.returncode != 0:
error( stdout + stderr )
open( filename+'.html', 'w' ).write( stdout )
def get_filename( location ):
location = location.replace('/', '_')
timestamp = time.strftime( "%Y%m%d%H", time.localtime() )
return "%s/%s/%s" % ( CACHEDIR, location, timestamp )
def get_wetter(location, ip, html=False):
filename = get_filename( location )
if not os.path.exists( filename ):
limits.check_ip( ip )
save_weather_data( location, filename )
if html:
filename += '.html'
return open(filename).read()
def ip2location( ip ):
cached = os.path.join( IP2LCACHE, ip )
if os.path.exists( cached ):
return open( cached, 'r' ).read()
try:
t = requests.get( 'http://api.ip2location.com/?ip=%s&key=demo&package=WS10' % ip ).text
if ';' in t:
location = t.split(';')[3]
if not os.path.exists( IP2LCACHE ):
os.makedirs( IP2LCACHE )
open( cached, 'w' ).write( location )
return location
except:
pass
def get_location( ip_addr ):
response = reader.city( ip_addr )
city = response.city.name
if city is None and response.location:
coord = "%s, %s" % (response.location.latitude, response.location.longitude)
location = geolocator.reverse(coord, language='en')
city = location.raw.get('address', {}).get('city')
if city is None:
print ip_addr
city = ip2location( ip_addr )
return city or NOT_FOUND_LOCATION
def load_aliases( aliases_filename ):
aliases_db = {}
with open( aliases_filename, 'r' ) as f:
for line in f.readlines():
from_, to_ = line.split(':', 1)
aliases_db[ from_.strip().lower() ] = to_.strip()
return aliases_db
location_alias = load_aliases( ALIASES )
def location_canonical_name( location ):
if location.lower() in location_alias:
return location_alias[location.lower()]
return location
def show_help():
return open(HELP_FILE, 'r').read()
@app.route('/files/<path:path>')
def send_static(path):
return send_from_directory(STATIC, path)
@app.route('/favicon.ico')
def send_favicon():
return send_from_directory(STATIC, 'favicon.ico')
@app.route("/")
@app.route("/<string:location>")
def wttr(location = None):
user_agent = request.headers.get('User-Agent').lower()
html_output = True
if 'curl' in user_agent or 'wget' in user_agent or 'httpie' in user_agent or 'lwp-request' in user_agent:
html_output = False
if location == ':help':
help_ = show_help()
if html_output:
return render_template( 'index.html', body=help_ )
else:
return help_
orig_location = location
if request.headers.getlist("X-Forwarded-For"):
ip = request.headers.getlist("X-Forwarded-For")[0]
if ip.startswith('::ffff:'):
ip = ip[7:]
else:
ip = request.remote_addr
try:
if location is None:
location = get_location( ip )
if is_ip( location ):
location = get_location( location )
if location.startswith('@'):
location = get_location( socket.gethostbyname( location[1:] ) )
location = location_canonical_name( location )
log("%s %s %s %s" % (ip, user_agent, orig_location, location))
return get_wetter( location, ip, html=html_output )
except Exception, e:
logging.error("Exception has occurred", exc_info=1)
return str(e).rstrip()+"\n"
server = WSGIServer(("", 8002), app)
server.serve_forever()