|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import gzip
import io
import locale
import os
import re
import sys
import zlib
import email.utils
import json
try:
import urllib.request as compat_urllib_request
except ImportError: # Python 2
import urllib2 as compat_urllib_request
try:
import urllib.error as compat_urllib_error
except ImportError: # Python 2
import urllib2 as compat_urllib_error
try:
import urllib.parse as compat_urllib_parse
except ImportError: # Python 2
import urllib as compat_urllib_parse
try:
from urllib.parse import urlparse as compat_urllib_parse_urlparse
except ImportError: # Python 2
from urlparse import urlparse as compat_urllib_parse_urlparse
try:
import http.cookiejar as compat_cookiejar
except ImportError: # Python 2
import cookielib as compat_cookiejar
try:
import html.entities as compat_html_entities
except ImportError: # Python 2
import htmlentitydefs as compat_html_entities
try:
import html.parser as compat_html_parser
except ImportError: # Python 2
import HTMLParser as compat_html_parser
try:
import http.client as compat_http_client
except ImportError: # Python 2
import httplib as compat_http_client
try:
from subprocess import DEVNULL
compat_subprocess_get_DEVNULL = lambda: DEVNULL
except ImportError:
compat_subprocess_get_DEVNULL = lambda: open(os.path.devnull, 'w')
try:
from urllib.parse import parse_qs as compat_parse_qs
except ImportError: # Python 2
# HACK: The following is the correct parse_qs implementation from cpython 3's stdlib.
# Python 2's version is apparently totally broken
def _unquote(string, encoding='utf-8', errors='replace'):
if string == '':
return string
res = string.split('%')
if len(res) == 1:
return string
if encoding is None:
encoding = 'utf-8'
if errors is None:
errors = 'replace'
# pct_sequence: contiguous sequence of percent-encoded bytes, decoded
pct_sequence = b''
string = res[0]
for item in res[1:]:
try:
if not item:
raise ValueError
pct_sequence += item[:2].decode('hex')
rest = item[2:]
if not rest:
# This segment was just a single percent-encoded character.
# May be part of a sequence of code units, so delay decoding.
# (Stored in pct_sequence).
continue
except ValueError:
rest = '%' + item
# Encountered non-percent-encoded characters. Flush the current
# pct_sequence.
string += pct_sequence.decode(encoding, errors) + rest
pct_sequence = b''
if pct_sequence:
# Flush the final pct_sequence
string += pct_sequence.decode(encoding, errors)
return string
def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
encoding='utf-8', errors='replace'):
qs, _coerce_result = qs, unicode
pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
r = []
for name_value in pairs:
if not name_value and not strict_parsing:
continue
nv = name_value.split('=', 1)
if len(nv) != 2:
if strict_parsing:
raise ValueError("bad query field: %r" % (name_value,))
# Handle case of a control-name with no equal sign
if keep_blank_values:
nv.append('')
else:
continue
if len(nv[1]) or keep_blank_values:
name = nv[0].replace('+', ' ')
name = _unquote(name, encoding=encoding, errors=errors)
name = _coerce_result(name)
value = nv[1].replace('+', ' ')
value = _unquote(value, encoding=encoding, errors=errors)
value = _coerce_result(value)
r.append((name, value))
return r
def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False,
encoding='utf-8', errors='replace'):
parsed_result = {}
pairs = _parse_qsl(qs, keep_blank_values, strict_parsing,
encoding=encoding, errors=errors)
for name, value in pairs:
if name in parsed_result:
parsed_result[name].append(value)
else:
parsed_result[name] = [value]
return parsed_result
try:
compat_str = unicode # Python 2
except NameError:
compat_str = str
try:
compat_chr = unichr # Python 2
except NameError:
compat_chr = chr
std_headers = {
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20100101 Firefox/10.0',
'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Encoding': 'gzip, deflate',
'Accept-Language': 'en-us,en;q=0.5',
}
def preferredencoding():
"""Get preferred encoding.
Returns the best encoding scheme for the system, based on
locale.getpreferredencoding() and some further tweaks.
"""
try:
pref = locale.getpreferredencoding()
u'TEST'.encode(pref)
except:
pref = 'UTF-8'
return pref
if sys.version_info < (3,0):
def compat_print(s):
print(s.encode(preferredencoding(), 'xmlcharrefreplace'))
else:
def compat_print(s):
assert type(s) == type(u'')
print(s)
def htmlentity_transform(matchobj):
"""Transforms an HTML entity to a character.
This function receives a match object and is intended to be used with
the re.sub() function.
"""
entity = matchobj.group(1)
# Known non-numeric HTML entity
if entity in compat_html_entities.name2codepoint:
return compat_chr(compat_html_entities.name2codepoint[entity])
mobj = re.match(u'(?u)#(x?\\d+)', entity)
if mobj is not None:
numstr = mobj.group(1)
if numstr.startswith(u'x'):
base = 16
numstr = u'0%s' % numstr
else:
base = 10
return compat_chr(int(numstr, base))
# Unknown entity in name, return its literal representation
return (u'&%s;' % entity)
compat_html_parser.locatestarttagend = re.compile(r"""<[a-zA-Z][-.a-zA-Z0-9:_]*(?:\s+(?:(?<=['"\s])[^\s/>][^\s/=>]*(?:\s*=+\s*(?:'[^']*'|"[^"]*"|(?!['"])[^>\s]*))?\s*)*)?\s*""", re.VERBOSE) # backport bugfix
class IDParser(compat_html_parser.HTMLParser):
"""Modified HTMLParser that isolates a tag with the specified id"""
def __init__(self, id):
self.id = id
self.result = None
self.started = False
self.depth = {}
self.html = None
self.watch_startpos = False
self.error_count = 0
compat_html_parser.HTMLParser.__init__(self)
def error(self, message):
if self.error_count > 10 or self.started:
raise compat_html_parser.HTMLParseError(message, self.getpos())
self.rawdata = '\n'.join(self.html.split('\n')[self.getpos()[0]:]) # skip one line
self.error_count += 1
self.goahead(1)
def loads(self, html):
self.html = html
self.feed(html)
self.close()
def handle_starttag(self, tag, attrs):
attrs = dict(attrs)
if self.started:
self.find_startpos(None)
if 'id' in attrs and attrs['id'] == self.id:
self.result = [tag]
self.started = True
self.watch_startpos = True
if self.started:
if not tag in self.depth: self.depth[tag] = 0
self.depth[tag] += 1
def handle_endtag(self, tag):
if self.started:
if tag in self.depth: self.depth[tag] -= 1
if self.depth[self.result[0]] == 0:
self.started = False
self.result.append(self.getpos())
def find_startpos(self, x):
"""Needed to put the start position of the result (self.result[1])
after the opening tag with the requested id"""
if self.watch_startpos:
self.watch_startpos = False
self.result.append(self.getpos())
handle_entityref = handle_charref = handle_data = handle_comment = \
handle_decl = handle_pi = unknown_decl = find_startpos
def get_result(self):
if self.result is None:
return None
if len(self.result) != 3:
return None
lines = self.html.split('\n')
lines = lines[self.result[1][0]-1:self.result[2][0]]
lines[0] = lines[0][self.result[1][1]:]
if len(lines) == 1:
lines[-1] = lines[-1][:self.result[2][1]-self.result[1][1]]
lines[-1] = lines[-1][:self.result[2][1]]
return '\n'.join(lines).strip()
def get_element_by_id(id, html):
"""Return the content of the tag with the specified id in the passed HTML document"""
parser = IDParser(id)
try:
parser.loads(html)
except compat_html_parser.HTMLParseError:
pass
return parser.get_result()
def clean_html(html):
"""Clean an HTML snippet into a readable string"""
# Newline vs <br />
html = html.replace('\n', ' ')
html = re.sub('\s*<\s*br\s*/?\s*>\s*', '\n', html)
# Strip html tags
html = re.sub('<.*?>', '', html)
# Replace html entities
html = unescapeHTML(html)
return html
def sanitize_open(filename, open_mode):
"""Try to open the given filename, and slightly tweak it if this fails.
Attempts to open the given filename. If this fails, it tries to change
the filename slightly, step by step, until it's either able to open it
or it fails and raises a final exception, like the standard open()
function.
It returns the tuple (stream, definitive_file_name).
"""
try:
if filename == u'-':
if sys.platform == 'win32':
import msvcrt
msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
return (sys.stdout, filename)
stream = open(encodeFilename(filename), open_mode)
return (stream, filename)
except (IOError, OSError) as err:
# In case of error, try to remove win32 forbidden chars
filename = re.sub(u'[/<>:"\\|\\\\?\\*]', u'#', filename)
# An exception here should be caught in the caller
stream = open(encodeFilename(filename), open_mode)
return (stream, filename)
def timeconvert(timestr):
"""Convert RFC 2822 defined time string into system timestamp"""
timestamp = None
timetuple = email.utils.parsedate_tz(timestr)
if timetuple is not None:
timestamp = email.utils.mktime_tz(timetuple)
return timestamp
def sanitize_filename(s, restricted=False, is_id=False):
"""Sanitizes a string so it could be used as part of a filename.
If restricted is set, use a stricter subset of allowed characters.
Set is_id if this is not an arbitrary string, but an ID that should be kept if possible
"""
def replace_insane(char):
if char == '?' or ord(char) < 32 or ord(char) == 127:
return ''
elif char == '"':
return '' if restricted else '\''
elif char == ':':
return '_-' if restricted else ' -'
elif char in '\\/|*<>':
return '_'
if restricted and (char in '!&\'()[]{}$;`^,#' or char.isspace()):
return '_'
if restricted and ord(char) > 127:
return '_'
return char
result = u''.join(map(replace_insane, s))
if not is_id:
while '__' in result:
result = result.replace('__', '_')
result = result.strip('_')
# Common case of "Foreign band name - English song title"
if restricted and result.startswith('-_'):
result = result[2:]
if not result:
result = '_'
return result
def orderedSet(iterable):
""" Remove all duplicates from the input iterable """
res = []
for el in iterable:
if el not in res:
res.append(el)
return res
def unescapeHTML(s):
"""
@param s a string
"""
assert type(s) == type(u'')
result = re.sub(u'(?u)&(.+?);', htmlentity_transform, s)
return result
def encodeFilename(s):
"""
@param s The name of the file
"""
assert type(s) == type(u'')
# Python 3 has a Unicode API
if sys.version_info >= (3, 0):
return s
if sys.platform == 'win32' and sys.getwindowsversion()[0] >= 5:
# Pass u'' directly to use Unicode APIs on Windows 2000 and up
# (Detecting Windows NT 4 is tricky because 'major >= 4' would
# match Windows 9x series as well. Besides, NT 4 is obsolete.)
return s
else:
return s.encode(sys.getfilesystemencoding(), 'ignore')
class DownloadError(Exception):
"""Download Error exception.
This exception may be thrown by FileDownloader objects if they are not
configured to continue on errors. They will contain the appropriate
error message.
"""
pass
class SameFileError(Exception):
"""Same File exception.
This exception will be thrown by FileDownloader objects if they detect
multiple files would have to be downloaded to the same file on disk.
"""
pass
class PostProcessingError(Exception):
"""Post Processing exception.
This exception may be raised by PostProcessor's .run() method to
indicate an error in the postprocessing task.
"""
pass
class MaxDownloadsReached(Exception):
""" --max-downloads limit has been reached. """
pass
class UnavailableVideoError(Exception):
"""Unavailable Format exception.
This exception will be thrown when a video is requested
in a format that is not available for that video.
"""
pass
class ContentTooShortError(Exception):
"""Content Too Short exception.
This exception may be raised by FileDownloader objects when a file they
download is too small for what the server announced first, indicating
the connection was probably interrupted.
"""
# Both in bytes
downloaded = None
expected = None
def __init__(self, downloaded, expected):
self.downloaded = downloaded
self.expected = expected
class Trouble(Exception):
"""Trouble helper exception
This is an exception to be handled with
FileDownloader.trouble
"""
class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
"""Handler for HTTP requests and responses.
This class, when installed with an OpenerDirector, automatically adds
the standard headers to every HTTP request and handles gzipped and
deflated responses from web servers. If compression is to be avoided in
a particular request, the original request in the program code only has
to include the HTTP header "Youtubedl-No-Compression", which will be
removed before making the real request.
Part of this code was copied from:
http://techknack.net/python-urllib2-handlers/
Andrew Rowls, the author of that code, agreed to release it to the
public domain.
"""
@staticmethod
def deflate(data):
try:
return zlib.decompress(data, -zlib.MAX_WBITS)
except zlib.error:
return zlib.decompress(data)
@staticmethod
def addinfourl_wrapper(stream, headers, url, code):
if hasattr(compat_urllib_request.addinfourl, 'getcode'):
return compat_urllib_request.addinfourl(stream, headers, url, code)
ret = compat_urllib_request.addinfourl(stream, headers, url)
ret.code = code
return ret
def http_request(self, req):
for h in std_headers:
if h in req.headers:
del req.headers[h]
req.add_header(h, std_headers[h])
if 'Youtubedl-no-compression' in req.headers:
if 'Accept-encoding' in req.headers:
del req.headers['Accept-encoding']
del req.headers['Youtubedl-no-compression']
return req
def http_response(self, req, resp):
old_resp = resp
# gzip
if resp.headers.get('Content-encoding', '') == 'gzip':
gz = gzip.GzipFile(fileobj=io.BytesIO(resp.read()), mode='r')
resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
resp.msg = old_resp.msg
# deflate
if resp.headers.get('Content-encoding', '') == 'deflate':
gz = io.BytesIO(self.deflate(resp.read()))
resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
resp.msg = old_resp.msg
return resp
https_request = http_request
https_response = http_response
|
