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Merge pull request #125 from jbruchon/master
Keep download archive in memory for better performance
This commit is contained in:
commit
c71700dbe4
@ -114,6 +114,54 @@ if compat_os_name == 'nt':
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import ctypes
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class ArchiveTree(object):
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"""Binary search tree for download archive entries"""
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def __init__(self, line):
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self.left = None
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self.right = None
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self.line = line
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# Tree insertion
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def at_insert(self, line):
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cur = self
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while True:
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if cur.line:
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if line < cur.line:
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if cur.left is None:
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cur.left = ArchiveTree(line)
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return
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else:
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cur = cur.left
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continue
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elif line > cur.line:
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if cur.right is None:
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cur.right = ArchiveTree(line)
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return
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else:
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cur = cur.right
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continue
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else:
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# Duplicate line found
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return
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else:
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cur.line = line
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return
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def at_exist(self, line):
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if self.line is None:
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return False
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if line < self.line:
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if self.left is None:
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return False
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return self.left.at_exist(line)
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elif line > self.line:
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if self.right is None:
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return False
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return self.right.at_exist(line)
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else:
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return True
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class YoutubeDL(object):
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"""YoutubeDL class.
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@ -359,6 +407,39 @@ class YoutubeDL(object):
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}
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self.params.update(params)
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self.cache = Cache(self)
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self.archive = ArchiveTree(None)
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"""Preload the archive, if any is specified"""
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def preload_download_archive(self):
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lines = []
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fn = self.params.get('download_archive')
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if fn is None:
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return False
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try:
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with locked_file(fn, 'r', encoding='utf-8') as archive_file:
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for line in archive_file:
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lines.append(line.strip())
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except IOError as ioe:
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if ioe.errno != errno.ENOENT:
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raise
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lmax = len(lines)
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if lmax > 10:
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pos = 0
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while pos < lmax:
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if lmax - pos <= 2:
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break
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target = random.randrange(pos + 1, lmax - 1)
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# Swap line at pos with randomly chosen target
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temp = lines[pos]
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lines[pos] = lines[target]
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lines[target] = temp
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pos += 1
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elif lmax < 1:
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# No lines were loaded
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return False
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for x in lines:
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self.archive.at_insert(x)
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return True
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def check_deprecated(param, option, suggestion):
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if self.params.get(param) is not None:
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@ -367,6 +448,11 @@ class YoutubeDL(object):
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return True
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return False
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if self.params.get('verbose'):
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self.to_stdout('[debug] Loading archive file %r' % self.params.get('download_archive'))
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preload_download_archive(self)
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if check_deprecated('cn_verification_proxy', '--cn-verification-proxy', '--geo-verification-proxy'):
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if self.params.get('geo_verification_proxy') is None:
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self.params['geo_verification_proxy'] = self.params['cn_verification_proxy']
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@ -722,7 +808,7 @@ class YoutubeDL(object):
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return None
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def _match_entry(self, info_dict, incomplete):
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""" Returns None iff the file should be downloaded """
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""" Returns None if the file should be downloaded """
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video_title = info_dict.get('title', info_dict.get('id', 'video'))
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if 'title' in info_dict:
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@ -2142,15 +2228,7 @@ class YoutubeDL(object):
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if not vid_id:
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return False # Incomplete video information
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try:
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with locked_file(fn, 'r', encoding='utf-8') as archive_file:
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for line in archive_file:
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if line.strip() == vid_id:
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return True
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except IOError as ioe:
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if ioe.errno != errno.ENOENT:
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raise
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return False
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return self.archive.at_exist(vid_id)
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def record_download_archive(self, info_dict):
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fn = self.params.get('download_archive')
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@ -2160,6 +2238,7 @@ class YoutubeDL(object):
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assert vid_id
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with locked_file(fn, 'a', encoding='utf-8') as archive_file:
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archive_file.write(vid_id + '\n')
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self.archive.at_insert(vid_id)
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@staticmethod
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def format_resolution(format, default='unknown'):
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