mirror of
https://github.com/ytdl-org/youtube-dl.git
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375 lines
10 KiB
Python
375 lines
10 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import gzip
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import htmlentitydefs
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import HTMLParser
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import locale
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import os
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import re
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import sys
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import zlib
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import urllib2
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import email.utils
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try:
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import cStringIO as StringIO
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except ImportError:
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import StringIO
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std_headers = {
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'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:5.0.1) Gecko/20100101 Firefox/5.0.1',
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'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
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'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
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'Accept-Encoding': 'gzip, deflate',
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'Accept-Language': 'en-us,en;q=0.5',
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}
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def preferredencoding():
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"""Get preferred encoding.
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Returns the best encoding scheme for the system, based on
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locale.getpreferredencoding() and some further tweaks.
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"""
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def yield_preferredencoding():
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try:
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pref = locale.getpreferredencoding()
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u'TEST'.encode(pref)
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except:
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pref = 'UTF-8'
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while True:
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yield pref
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return yield_preferredencoding().next()
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def htmlentity_transform(matchobj):
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"""Transforms an HTML entity to a Unicode character.
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This function receives a match object and is intended to be used with
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the re.sub() function.
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"""
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entity = matchobj.group(1)
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# Known non-numeric HTML entity
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if entity in htmlentitydefs.name2codepoint:
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return unichr(htmlentitydefs.name2codepoint[entity])
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# Unicode character
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mobj = re.match(ur'(?u)#(x?\d+)', entity)
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if mobj is not None:
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numstr = mobj.group(1)
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if numstr.startswith(u'x'):
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base = 16
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numstr = u'0%s' % numstr
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else:
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base = 10
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return unichr(long(numstr, base))
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# Unknown entity in name, return its literal representation
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return (u'&%s;' % entity)
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def sanitize_title(utitle):
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"""Sanitizes a video title so it could be used as part of a filename."""
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utitle = re.sub(ur'(?u)&(.+?);', htmlentity_transform, utitle)
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return utitle.replace(unicode(os.sep), u'%')
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def sanitize_open(filename, open_mode):
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"""Try to open the given filename, and slightly tweak it if this fails.
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Attempts to open the given filename. If this fails, it tries to change
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the filename slightly, step by step, until it's either able to open it
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or it fails and raises a final exception, like the standard open()
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function.
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It returns the tuple (stream, definitive_file_name).
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"""
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try:
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if filename == u'-':
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if sys.platform == 'win32':
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import msvcrt
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msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
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return (sys.stdout, filename)
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stream = open(encodeFilename(filename), open_mode)
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return (stream, filename)
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except (IOError, OSError), err:
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# In case of error, try to remove win32 forbidden chars
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filename = re.sub(ur'[/<>:"\|\?\*]', u'#', filename)
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# An exception here should be caught in the caller
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stream = open(encodeFilename(filename), open_mode)
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return (stream, filename)
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def timeconvert(timestr):
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"""Convert RFC 2822 defined time string into system timestamp"""
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timestamp = None
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timetuple = email.utils.parsedate_tz(timestr)
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if timetuple is not None:
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timestamp = email.utils.mktime_tz(timetuple)
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return timestamp
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def simplify_title(title):
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expr = re.compile(ur'[^\w\d_\-]+', flags=re.UNICODE)
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return expr.sub(u'_', title).strip(u'_')
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def orderedSet(iterable):
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""" Remove all duplicates from the input iterable """
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res = []
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for el in iterable:
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if el not in res:
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res.append(el)
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return res
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def unescapeHTML(s):
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"""
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@param s a string (of type unicode)
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"""
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assert type(s) == type(u'')
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htmlParser = HTMLParser.HTMLParser()
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return htmlParser.unescape(s)
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def encodeFilename(s):
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"""
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@param s The name of the file (of type unicode)
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"""
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assert type(s) == type(u'')
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if sys.platform == 'win32' and sys.getwindowsversion().major >= 5:
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# Pass u'' directly to use Unicode APIs on Windows 2000 and up
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# (Detecting Windows NT 4 is tricky because 'major >= 4' would
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# match Windows 9x series as well. Besides, NT 4 is obsolete.)
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return s
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else:
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return s.encode(sys.getfilesystemencoding(), 'ignore')
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class DownloadError(Exception):
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"""Download Error exception.
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This exception may be thrown by FileDownloader objects if they are not
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configured to continue on errors. They will contain the appropriate
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error message.
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"""
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pass
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class SameFileError(Exception):
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"""Same File exception.
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This exception will be thrown by FileDownloader objects if they detect
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multiple files would have to be downloaded to the same file on disk.
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"""
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pass
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class PostProcessingError(Exception):
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"""Post Processing exception.
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This exception may be raised by PostProcessor's .run() method to
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indicate an error in the postprocessing task.
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"""
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pass
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class MaxDownloadsReached(Exception):
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""" --max-downloads limit has been reached. """
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pass
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class UnavailableVideoError(Exception):
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"""Unavailable Format exception.
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This exception will be thrown when a video is requested
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in a format that is not available for that video.
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"""
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pass
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class ContentTooShortError(Exception):
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"""Content Too Short exception.
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This exception may be raised by FileDownloader objects when a file they
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download is too small for what the server announced first, indicating
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the connection was probably interrupted.
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"""
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# Both in bytes
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downloaded = None
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expected = None
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def __init__(self, downloaded, expected):
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self.downloaded = downloaded
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self.expected = expected
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class YoutubeDLHandler(urllib2.HTTPHandler):
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"""Handler for HTTP requests and responses.
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This class, when installed with an OpenerDirector, automatically adds
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the standard headers to every HTTP request and handles gzipped and
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deflated responses from web servers. If compression is to be avoided in
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a particular request, the original request in the program code only has
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to include the HTTP header "Youtubedl-No-Compression", which will be
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removed before making the real request.
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Part of this code was copied from:
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http://techknack.net/python-urllib2-handlers/
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Andrew Rowls, the author of that code, agreed to release it to the
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public domain.
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"""
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@staticmethod
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def deflate(data):
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try:
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return zlib.decompress(data, -zlib.MAX_WBITS)
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except zlib.error:
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return zlib.decompress(data)
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@staticmethod
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def addinfourl_wrapper(stream, headers, url, code):
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if hasattr(urllib2.addinfourl, 'getcode'):
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return urllib2.addinfourl(stream, headers, url, code)
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ret = urllib2.addinfourl(stream, headers, url)
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ret.code = code
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return ret
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def http_request(self, req):
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for h in std_headers:
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if h in req.headers:
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del req.headers[h]
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req.add_header(h, std_headers[h])
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if 'Youtubedl-no-compression' in req.headers:
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if 'Accept-encoding' in req.headers:
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del req.headers['Accept-encoding']
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del req.headers['Youtubedl-no-compression']
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return req
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def http_response(self, req, resp):
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old_resp = resp
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# gzip
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if resp.headers.get('Content-encoding', '') == 'gzip':
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gz = gzip.GzipFile(fileobj=StringIO.StringIO(resp.read()), mode='r')
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resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
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resp.msg = old_resp.msg
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# deflate
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if resp.headers.get('Content-encoding', '') == 'deflate':
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gz = StringIO.StringIO(self.deflate(resp.read()))
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resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
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resp.msg = old_resp.msg
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return resp
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try:
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import json
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except ImportError: # Python <2.6, use trivialjson (https://github.com/phihag/trivialjson):
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import re
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class json(object):
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@staticmethod
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def loads(s):
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s = s.decode('UTF-8')
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def raiseError(msg, i):
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raise ValueError(msg + ' at position ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]))
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def skipSpace(i, expectMore=True):
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while i < len(s) and s[i] in ' \t\r\n':
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i += 1
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if expectMore:
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if i >= len(s):
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raiseError('Premature end', i)
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return i
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def decodeEscape(match):
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esc = match.group(1)
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_STATIC = {
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'"': '"',
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'\\': '\\',
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'/': '/',
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'b': unichr(0x8),
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'f': unichr(0xc),
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'n': '\n',
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'r': '\r',
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't': '\t',
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}
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if esc in _STATIC:
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return _STATIC[esc]
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if esc[0] == 'u':
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if len(esc) == 1+4:
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return unichr(int(esc[1:5], 16))
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if len(esc) == 5+6 and esc[5:7] == '\\u':
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hi = int(esc[1:5], 16)
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low = int(esc[7:11], 16)
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return unichr((hi - 0xd800) * 0x400 + low - 0xdc00 + 0x10000)
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raise ValueError('Unknown escape ' + str(esc))
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def parseString(i):
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i += 1
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e = i
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while True:
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e = s.index('"', e)
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bslashes = 0
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while s[e-bslashes-1] == '\\':
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bslashes += 1
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if bslashes % 2 == 1:
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e += 1
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continue
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break
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rexp = re.compile(r'\\(u[dD][89aAbB][0-9a-fA-F]{2}\\u[0-9a-fA-F]{4}|u[0-9a-fA-F]{4}|.|$)')
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stri = rexp.sub(decodeEscape, s[i:e])
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return (e+1,stri)
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def parseObj(i):
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i += 1
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res = {}
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i = skipSpace(i)
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if s[i] == '}': # Empty dictionary
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return (i+1,res)
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while True:
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if s[i] != '"':
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raiseError('Expected a string object key', i)
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i,key = parseString(i)
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i = skipSpace(i)
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if i >= len(s) or s[i] != ':':
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raiseError('Expected a colon', i)
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i,val = parse(i+1)
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res[key] = val
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i = skipSpace(i)
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if s[i] == '}':
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return (i+1, res)
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if s[i] != ',':
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raiseError('Expected comma or closing curly brace', i)
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i = skipSpace(i+1)
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def parseArray(i):
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res = []
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i = skipSpace(i+1)
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if s[i] == ']': # Empty array
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return (i+1,res)
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while True:
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i,val = parse(i)
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res.append(val)
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i = skipSpace(i) # Raise exception if premature end
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if s[i] == ']':
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return (i+1, res)
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if s[i] != ',':
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raiseError('Expected a comma or closing bracket', i)
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i = skipSpace(i+1)
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def parseDiscrete(i):
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for k,v in {'true': True, 'false': False, 'null': None}.items():
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if s.startswith(k, i):
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return (i+len(k), v)
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raiseError('Not a boolean (or null)', i)
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def parseNumber(i):
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mobj = re.match('^(-?(0|[1-9][0-9]*)(\.[0-9]*)?([eE][+-]?[0-9]+)?)', s[i:])
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if mobj is None:
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raiseError('Not a number', i)
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nums = mobj.group(1)
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if '.' in nums or 'e' in nums or 'E' in nums:
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return (i+len(nums), float(nums))
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return (i+len(nums), int(nums))
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CHARMAP = {'{': parseObj, '[': parseArray, '"': parseString, 't': parseDiscrete, 'f': parseDiscrete, 'n': parseDiscrete}
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def parse(i):
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i = skipSpace(i)
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i,res = CHARMAP.get(s[i], parseNumber)(i)
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i = skipSpace(i, False)
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return (i,res)
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i,res = parse(0)
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if i < len(s):
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raise ValueError('Extra data at end of input (index ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]) + ')')
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return res
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