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375 lines
10 KiB
375 lines
10 KiB
#!/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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