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mirror of https://github.com/moparisthebest/SickRage synced 2024-11-06 01:15:05 -05:00
SickRage/cherrypy/lib/encoding.py
echel0n 0d9fbc1ad7 Welcome to our SickBeard-TVRage Edition ...
This version of SickBeard uses both TVDB and TVRage to search and gather it's series data from allowing you to now have access to and download shows that you couldn't before because of being locked into only what TheTVDB had to offer.

Also this edition is based off the code we used in our XEM editon so it does come with scene numbering support as well as all the other features our XEM edition has to offer.

Please before using this with your existing database (sickbeard.db) please make a backup copy of it and delete any other database files such as cache.db and failed.db if present, we HIGHLY recommend starting out with no database files at all to make this a fresh start but the choice is at your own risk!

Enjoy!
2014-03-09 22:39:12 -07:00

363 lines
14 KiB
Python

try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
try:
set
except NameError:
from sets import Set as set
import struct
import time
import types
import cherrypy
from cherrypy.lib import file_generator
from cherrypy.lib import set_vary_header
def decode(encoding=None, default_encoding='utf-8'):
"""Replace or extend the list of charsets used to decode a request entity.
Either argument may be a single string or a list of strings.
encoding: If not None, restricts the set of charsets attempted while decoding
a request entity to the given set (even if a different charset is given in
the Content-Type request header).
default_encoding: Only in effect if the 'encoding' argument is not given.
If given, the set of charsets attempted while decoding a request entity is
*extended* with the given value(s).
"""
body = cherrypy.request.body
if encoding is not None:
if not isinstance(encoding, list):
encoding = [encoding]
body.attempt_charsets = encoding
elif default_encoding:
if not isinstance(default_encoding, list):
default_encoding = [default_encoding]
body.attempt_charsets = body.attempt_charsets + default_encoding
class ResponseEncoder:
default_encoding = 'utf-8'
failmsg = "Response body could not be encoded with %r."
encoding = None
errors = 'strict'
text_only = True
add_charset = True
debug = False
def __init__(self, **kwargs):
for k, v in kwargs.items():
setattr(self, k, v)
self.attempted_charsets = set()
request = cherrypy.serving.request
if request.handler is not None:
# Replace request.handler with self
if self.debug:
cherrypy.log('Replacing request.handler', 'TOOLS.ENCODE')
self.oldhandler = request.handler
request.handler = self
def encode_stream(self, encoding):
"""Encode a streaming response body.
Use a generator wrapper, and just pray it works as the stream is
being written out.
"""
if encoding in self.attempted_charsets:
return False
self.attempted_charsets.add(encoding)
def encoder(body):
for chunk in body:
if isinstance(chunk, unicode):
chunk = chunk.encode(encoding, self.errors)
yield chunk
self.body = encoder(self.body)
return True
def encode_string(self, encoding):
"""Encode a buffered response body."""
if encoding in self.attempted_charsets:
return False
self.attempted_charsets.add(encoding)
try:
body = []
for chunk in self.body:
if isinstance(chunk, unicode):
chunk = chunk.encode(encoding, self.errors)
body.append(chunk)
self.body = body
except (LookupError, UnicodeError):
return False
else:
return True
def find_acceptable_charset(self):
request = cherrypy.serving.request
response = cherrypy.serving.response
if self.debug:
cherrypy.log('response.stream %r' % response.stream, 'TOOLS.ENCODE')
if response.stream:
encoder = self.encode_stream
else:
encoder = self.encode_string
if "Content-Length" in response.headers:
# Delete Content-Length header so finalize() recalcs it.
# Encoded strings may be of different lengths from their
# unicode equivalents, and even from each other. For example:
# >>> t = u"\u7007\u3040"
# >>> len(t)
# 2
# >>> len(t.encode("UTF-8"))
# 6
# >>> len(t.encode("utf7"))
# 8
del response.headers["Content-Length"]
# Parse the Accept-Charset request header, and try to provide one
# of the requested charsets (in order of user preference).
encs = request.headers.elements('Accept-Charset')
charsets = [enc.value.lower() for enc in encs]
if self.debug:
cherrypy.log('charsets %s' % repr(charsets), 'TOOLS.ENCODE')
if self.encoding is not None:
# If specified, force this encoding to be used, or fail.
encoding = self.encoding.lower()
if self.debug:
cherrypy.log('Specified encoding %r' % encoding, 'TOOLS.ENCODE')
if (not charsets) or "*" in charsets or encoding in charsets:
if self.debug:
cherrypy.log('Attempting encoding %r' % encoding, 'TOOLS.ENCODE')
if encoder(encoding):
return encoding
else:
if not encs:
if self.debug:
cherrypy.log('Attempting default encoding %r' %
self.default_encoding, 'TOOLS.ENCODE')
# Any character-set is acceptable.
if encoder(self.default_encoding):
return self.default_encoding
else:
raise cherrypy.HTTPError(500, self.failmsg % self.default_encoding)
else:
if "*" not in charsets:
# If no "*" is present in an Accept-Charset field, then all
# character sets not explicitly mentioned get a quality
# value of 0, except for ISO-8859-1, which gets a quality
# value of 1 if not explicitly mentioned.
iso = 'iso-8859-1'
if iso not in charsets:
if self.debug:
cherrypy.log('Attempting ISO-8859-1 encoding',
'TOOLS.ENCODE')
if encoder(iso):
return iso
for element in encs:
if element.qvalue > 0:
if element.value == "*":
# Matches any charset. Try our default.
if self.debug:
cherrypy.log('Attempting default encoding due '
'to %r' % element, 'TOOLS.ENCODE')
if encoder(self.default_encoding):
return self.default_encoding
else:
encoding = element.value
if self.debug:
cherrypy.log('Attempting encoding %r (qvalue >'
'0)' % element, 'TOOLS.ENCODE')
if encoder(encoding):
return encoding
# No suitable encoding found.
ac = request.headers.get('Accept-Charset')
if ac is None:
msg = "Your client did not send an Accept-Charset header."
else:
msg = "Your client sent this Accept-Charset header: %s." % ac
msg += " We tried these charsets: %s." % ", ".join(self.attempted_charsets)
raise cherrypy.HTTPError(406, msg)
def __call__(self, *args, **kwargs):
response = cherrypy.serving.response
self.body = self.oldhandler(*args, **kwargs)
if isinstance(self.body, basestring):
# strings get wrapped in a list because iterating over a single
# item list is much faster than iterating over every character
# in a long string.
if self.body:
self.body = [self.body]
else:
# [''] doesn't evaluate to False, so replace it with [].
self.body = []
elif isinstance(self.body, types.FileType):
self.body = file_generator(self.body)
elif self.body is None:
self.body = []
ct = response.headers.elements("Content-Type")
if self.debug:
cherrypy.log('Content-Type: %r' % ct, 'TOOLS.ENCODE')
if ct:
if self.text_only:
ct = ct[0]
if ct.value.lower().startswith("text/"):
if self.debug:
cherrypy.log('Content-Type %r starts with "text/"' % ct,
'TOOLS.ENCODE')
do_find = True
else:
if self.debug:
cherrypy.log('Not finding because Content-Type %r does '
'not start with "text/"' % ct,
'TOOLS.ENCODE')
do_find = False
else:
if self.debug:
cherrypy.log('Finding because not text_only', 'TOOLS.ENCODE')
do_find = True
if do_find:
# Set "charset=..." param on response Content-Type header
ct.params['charset'] = self.find_acceptable_charset()
if self.add_charset:
if self.debug:
cherrypy.log('Setting Content-Type %r' % ct,
'TOOLS.ENCODE')
response.headers["Content-Type"] = str(ct)
return self.body
# GZIP
def compress(body, compress_level):
"""Compress 'body' at the given compress_level."""
import zlib
# See http://www.gzip.org/zlib/rfc-gzip.html
yield '\x1f\x8b' # ID1 and ID2: gzip marker
yield '\x08' # CM: compression method
yield '\x00' # FLG: none set
# MTIME: 4 bytes
yield struct.pack("<L", int(time.time()) & 0xFFFFFFFFL)
yield '\x02' # XFL: max compression, slowest algo
yield '\xff' # OS: unknown
crc = zlib.crc32("")
size = 0
zobj = zlib.compressobj(compress_level,
zlib.DEFLATED, -zlib.MAX_WBITS,
zlib.DEF_MEM_LEVEL, 0)
for line in body:
size += len(line)
crc = zlib.crc32(line, crc)
yield zobj.compress(line)
yield zobj.flush()
# CRC32: 4 bytes
yield struct.pack("<L", crc & 0xFFFFFFFFL)
# ISIZE: 4 bytes
yield struct.pack("<L", size & 0xFFFFFFFFL)
def decompress(body):
import gzip
zbuf = StringIO()
zbuf.write(body)
zbuf.seek(0)
zfile = gzip.GzipFile(mode='rb', fileobj=zbuf)
data = zfile.read()
zfile.close()
return data
def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
"""Try to gzip the response body if Content-Type in mime_types.
cherrypy.response.headers['Content-Type'] must be set to one of the
values in the mime_types arg before calling this function.
No compression is performed if any of the following hold:
* The client sends no Accept-Encoding request header
* No 'gzip' or 'x-gzip' is present in the Accept-Encoding header
* No 'gzip' or 'x-gzip' with a qvalue > 0 is present
* The 'identity' value is given with a qvalue > 0.
"""
request = cherrypy.serving.request
response = cherrypy.serving.response
set_vary_header(response, "Accept-Encoding")
if not response.body:
# Response body is empty (might be a 304 for instance)
if debug:
cherrypy.log('No response body', context='TOOLS.GZIP')
return
# If returning cached content (which should already have been gzipped),
# don't re-zip.
if getattr(request, "cached", False):
if debug:
cherrypy.log('Not gzipping cached response', context='TOOLS.GZIP')
return
acceptable = request.headers.elements('Accept-Encoding')
if not acceptable:
# If no Accept-Encoding field is present in a request,
# the server MAY assume that the client will accept any
# content coding. In this case, if "identity" is one of
# the available content-codings, then the server SHOULD use
# the "identity" content-coding, unless it has additional
# information that a different content-coding is meaningful
# to the client.
if debug:
cherrypy.log('No Accept-Encoding', context='TOOLS.GZIP')
return
ct = response.headers.get('Content-Type', '').split(';')[0]
for coding in acceptable:
if coding.value == 'identity' and coding.qvalue != 0:
if debug:
cherrypy.log('Non-zero identity qvalue: %r' % coding,
context='TOOLS.GZIP')
return
if coding.value in ('gzip', 'x-gzip'):
if coding.qvalue == 0:
if debug:
cherrypy.log('Zero gzip qvalue: %r' % coding,
context='TOOLS.GZIP')
return
if ct not in mime_types:
if debug:
cherrypy.log('Content-Type %r not in mime_types %r' %
(ct, mime_types), context='TOOLS.GZIP')
return
if debug:
cherrypy.log('Gzipping', context='TOOLS.GZIP')
# Return a generator that compresses the page
response.headers['Content-Encoding'] = 'gzip'
response.body = compress(response.body, compress_level)
if "Content-Length" in response.headers:
# Delete Content-Length header so finalize() recalcs it.
del response.headers["Content-Length"]
return
if debug:
cherrypy.log('No acceptable encoding found.', context='GZIP')
cherrypy.HTTPError(406, "identity, gzip").set_response()