Add chronological accuracy to Shabbos detection!

Author: Ben Regenspan

README.rst

@@ -53,6 +53,10 @@ that can be used for serving the various supported web frameworks: ``gunicorn``,
 Commonly Used Arguments
 +++++++++++++++++++++++
 
+  * ``--city=CITY`` - Specify the name of your city, or nearest population center.
+    It is important that this be set in order to correctly determine whether it
+    currently is or is not Shabbos. City must be one of those listed at
+    http://packages.python.org/astral/#cities
   * ``-c CONFIG, --config=CONFIG`` - Specify the path to a `config file`_
   * ``-b BIND, --bind=BIND`` - Specify a server socket to bind. Server sockets
     can be any of ``$(HOST)``, ``$(HOST):$(PORT)``, or ``unix:$(PATH)``.

gunicorn/config.py

@@ -1055,3 +1055,16 @@ class ProxyAllowFrom(Setting):
     desc = """\
         Front-end's IPs from which allowed accept proxy requests (comma separate).
         """
+
+class City(Setting):
+    name = "city"
+    section = "Server Mechanics"
+    cli = ["--city"]
+    validator = validate_string
+    default = "New York"
+    desc = """\
+        Name of nearby city to use for sun-up/sun-down calculations.
+
+        Must be in list of cities contained in
+        http://packages.python.org/astral/#astral-v0-6-2
+        """

gunicorn/http/message.py

@@ -8,14 +8,17 @@
 import socket
 from errno import ENOTCONN
 
+from astral import Astral
+import pytz
+
 from gunicorn.http.unreader import SocketUnreader
 from gunicorn.http.body import ChunkedReader, LengthReader, EOFReader, Body
 from gunicorn.http.errors import InvalidHeader, InvalidHeaderName, NoMoreData, \
 InvalidRequestLine, InvalidRequestMethod, InvalidHTTPVersion, \
 LimitRequestLine, LimitRequestHeaders, UnkosherRequest
 from gunicorn.http.errors import InvalidProxyLine, ForbiddenProxyRequest
 from gunicorn.six import BytesIO, urlsplit, bytes_to_str
-from gunicorn.util import SHABBOS, weekdayname
+from gunicorn.util import weekdayname
 
 MAX_REQUEST_LINE = 8190
 MAX_HEADERS = 32768
@@ -162,10 +165,15 @@ def get_data(self, unreader, buf, stop=False):
         buf.write(data)
 
     def parse(self, unreader):
-
-        day_today = weekdayname[datetime.today().weekday()]
-        if day_today == SHABBOS:
-            raise UnkosherRequest("I don't work on Shabbos!")
+        now = datetime.now(pytz.utc)
+        day_today = weekdayname[now.weekday()]
+        if day_today in ('Fri', 'Sat',):
+            a = Astral()
+            city = a[self.cfg.city]
+            times = city.sun(date=now, local=False)
+            if ((day_today == 'Fri' and now > times['sunrise'])
+                    or (day_today == 'Sat' and now < times['sunset'])):
+                raise UnkosherRequest("I don't work on Shabbos!")
 
         buf = BytesIO()
         self.get_data(unreader, buf, stop=True)

gunicorn/util.py

@@ -44,10 +44,6 @@
              'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
              'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
 
-# This is an extremely naive definition of Shabbos
-#   (TODO: use local sundown)
-SHABBOS = 'Sat'
-
 # Server and Date aren't technically hop-by-hop
 # headers, but they are in the purview of the
 # origin server which the WSGI spec says we should

setup.py

@@ -82,6 +82,11 @@ def run(self):
     tests_require = tests_require,
     cmdclass = {'test': PyTest},
 
+    install_requires=[
+        'astral==0.6.2',
+        'pytz==2012h'
+    ],
+
     entry_points="""
 
     [console_scripts]