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Porting zerobin to python 3

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This commit is contained in:
sametmax
2015-05-10 19:19:02 +02:00
parent 391df055f9
commit 9b84122414
137 changed files with 22928 additions and 4370 deletions
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177
libs/cherrypy/lib/encoding.py
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@@ -4,24 +4,25 @@ import time
import cherrypy
from cherrypy._cpcompat import basestring, BytesIO, ntob, set, unicodestr
from cherrypy.lib import file_generator
from cherrypy.lib import is_closable_iterator
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).
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).
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:
@@ -33,9 +34,34 @@ def decode(encoding=None, default_encoding='utf-8'):
default_encoding = [default_encoding]
body.attempt_charsets = body.attempt_charsets + default_encoding
class UTF8StreamEncoder:
def __init__(self, iterator):
self._iterator = iterator
def __iter__(self):
return self
def next(self):
return self.__next__()
def __next__(self):
res = next(self._iterator)
if isinstance(res, unicodestr):
res = res.encode('utf-8')
return res
def close(self):
if is_closable_iterator(self._iterator):
self._iterator.close()
def __getattr__(self, attr):
if attr.startswith('__'):
raise AttributeError(self, attr)
return getattr(self._iterator, attr)
class ResponseEncoder:
default_encoding = 'utf-8'
failmsg = "Response body could not be encoded with %r."
encoding = None
@@ -43,11 +69,11 @@ class ResponseEncoder:
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:
@@ -56,17 +82,17 @@ class ResponseEncoder:
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, unicodestr):
@@ -74,31 +100,30 @@ class ResponseEncoder:
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, unicodestr):
body = []
for chunk in self.body:
if isinstance(chunk, unicodestr):
try:
chunk = chunk.encode(encoding, self.errors)
body.append(chunk)
self.body = body
except (LookupError, UnicodeError):
return False
else:
return True
except (LookupError, UnicodeError):
return False
body.append(chunk)
self.body = body
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')
cherrypy.log('response.stream %r' %
response.stream, 'TOOLS.ENCODE')
if response.stream:
encoder = self.encode_stream
else:
@@ -115,22 +140,24 @@ class ResponseEncoder:
# >>> 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')
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')
cherrypy.log('Attempting encoding %r' %
encoding, 'TOOLS.ENCODE')
if encoder(encoding):
return encoding
else:
@@ -142,7 +169,8 @@ class ResponseEncoder:
if encoder(self.default_encoding):
return self.default_encoding
else:
raise cherrypy.HTTPError(500, self.failmsg % self.default_encoding)
raise cherrypy.HTTPError(500, self.failmsg %
self.default_encoding)
else:
for element in encs:
if element.qvalue > 0:
@@ -160,7 +188,7 @@ class ResponseEncoder:
'0)' % element, 'TOOLS.ENCODE')
if encoder(encoding):
return encoding
if "*" not in charsets:
# If no "*" is present in an Accept-Charset field, then all
# character sets not explicitly mentioned get a quality
@@ -173,20 +201,21 @@ class ResponseEncoder:
'TOOLS.ENCODE')
if encoder(iso):
return iso
# 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)
_charsets = ", ".join(sorted(self.attempted_charsets))
msg += " We tried these charsets: %s." % (_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
@@ -200,46 +229,49 @@ class ResponseEncoder:
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' % [str(h) for h in ct], 'TOOLS.ENCODE')
if ct:
cherrypy.log('Content-Type: %r' % [str(h)
for h in ct], 'TOOLS.ENCODE')
if ct and self.add_charset:
ct = ct[0]
if self.text_only:
if ct.value.lower().startswith("text/"):
if self.debug:
cherrypy.log('Content-Type %s starts with "text/"' % ct,
'TOOLS.ENCODE')
cherrypy.log(
'Content-Type %s starts with "text/"' % ct,
'TOOLS.ENCODE')
do_find = True
else:
if self.debug:
cherrypy.log('Not finding because Content-Type %s does '
'not start with "text/"' % ct,
cherrypy.log('Not finding because Content-Type %s '
'does not start with "text/"' % ct,
'TOOLS.ENCODE')
do_find = False
else:
if self.debug:
cherrypy.log('Finding because not text_only', 'TOOLS.ENCODE')
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 %s' % ct,
'TOOLS.ENCODE')
response.headers["Content-Type"] = str(ct)
if self.debug:
cherrypy.log('Setting Content-Type %s' % 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 ntob('\x1f\x8b') # ID1 and ID2: gzip marker
yield ntob('\x08') # CM: compression method
@@ -248,7 +280,7 @@ def compress(body, compress_level):
yield struct.pack("<L", int(time.time()) & int('FFFFFFFF', 16))
yield ntob('\x02') # XFL: max compression, slowest algo
yield ntob('\xff') # OS: unknown
crc = zlib.crc32(ntob(""))
size = 0
zobj = zlib.compressobj(compress_level,
@@ -259,15 +291,16 @@ def compress(body, compress_level):
crc = zlib.crc32(line, crc)
yield zobj.compress(line)
yield zobj.flush()
# CRC32: 4 bytes
yield struct.pack("<L", crc & int('FFFFFFFF', 16))
# ISIZE: 4 bytes
yield struct.pack("<L", size & int('FFFFFFFF', 16))
def decompress(body):
import gzip
zbuf = BytesIO()
zbuf.write(body)
zbuf.seek(0)
@@ -277,9 +310,10 @@ def decompress(body):
return data
def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
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.
@@ -287,32 +321,32 @@ def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
* type/subtype
* type/*
* type/*+subtype
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,
@@ -325,7 +359,7 @@ def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
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:
@@ -339,7 +373,7 @@ def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
cherrypy.log('Zero gzip qvalue: %s' % coding,
context='TOOLS.GZIP')
return
if ct not in mime_types:
# If the list of provided mime-types contains tokens
# such as 'text/*' or 'application/*+xml',
@@ -370,7 +404,7 @@ def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
cherrypy.log('Content-Type %s 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
@@ -379,10 +413,9 @@ def gzip(compress_level=5, mime_types=['text/html', 'text/plain'], debug=False):
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()