154 lines
4.6 KiB
Python
154 lines
4.6 KiB
Python
from __future__ import unicode_literals
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import os.path
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import subprocess
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import sys
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from .common import FileDownloader
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from ..utils import (
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encodeFilename,
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std_headers,
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)
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class ExternalFD(FileDownloader):
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def real_download(self, filename, info_dict):
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self.report_destination(filename)
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tmpfilename = self.temp_name(filename)
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retval = self._call_downloader(tmpfilename, info_dict)
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if retval == 0:
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fsize = os.path.getsize(encodeFilename(tmpfilename))
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self.to_screen('\r[%s] Downloaded %s bytes' % (self.get_basename(), fsize))
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self.try_rename(tmpfilename, filename)
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self._hook_progress({
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'downloaded_bytes': fsize,
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'total_bytes': fsize,
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'filename': filename,
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'status': 'finished',
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})
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return True
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else:
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self.to_stderr('\n')
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self.report_error('%s exited with code %d' % (
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self.get_basename(), retval))
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return False
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@classmethod
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def get_basename(cls):
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return cls.__name__[:-2].lower()
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@property
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def exe(self):
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return self.params.get('external_downloader')
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@classmethod
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def supports(cls, info_dict):
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return info_dict['protocol'] in ('http', 'https', 'ftp', 'ftps')
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def _calc_headers(self, info_dict):
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res = std_headers.copy()
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ua = info_dict.get('user_agent')
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if ua is not None:
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res['User-Agent'] = ua
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cookies = self._calc_cookies(info_dict)
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if cookies:
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res['Cookie'] = cookies
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return res
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def _calc_cookies(self, info_dict):
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class _PseudoRequest(object):
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def __init__(self, url):
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self.url = url
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self.headers = {}
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self.unverifiable = False
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def add_unredirected_header(self, k, v):
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self.headers[k] = v
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def get_full_url(self):
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return self.url
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def is_unverifiable(self):
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return self.unverifiable
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def has_header(self, h):
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return h in self.headers
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pr = _PseudoRequest(info_dict['url'])
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self.ydl.cookiejar.add_cookie_header(pr)
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return pr.headers.get('Cookie')
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def _call_downloader(self, tmpfilename, info_dict):
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""" Either overwrite this or implement _make_cmd """
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cmd = self._make_cmd(tmpfilename, info_dict)
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if sys.platform == 'win32' and sys.version_info < (3, 0):
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# Windows subprocess module does not actually support Unicode
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# on Python 2.x
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# See http://stackoverflow.com/a/9951851/35070
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subprocess_encoding = sys.getfilesystemencoding()
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cmd = [a.encode(subprocess_encoding, 'ignore') for a in cmd]
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else:
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subprocess_encoding = None
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self._debug_cmd(cmd, subprocess_encoding)
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p = subprocess.Popen(
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cmd, stderr=subprocess.PIPE)
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_, stderr = p.communicate()
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if p.returncode != 0:
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self.to_stderr(stderr)
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return p.returncode
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class CurlFD(ExternalFD):
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def _make_cmd(self, tmpfilename, info_dict):
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cmd = [self.exe, '-o', tmpfilename]
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for key, val in self._calc_headers(info_dict).items():
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cmd += ['--header', '%s: %s' % (key, val)]
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cmd += ['--', info_dict['url']]
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return cmd
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class WgetFD(ExternalFD):
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def _make_cmd(self, tmpfilename, info_dict):
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cmd = [self.exe, '-O', tmpfilename, '-nv', '--no-cookies']
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for key, val in self._calc_headers(info_dict).items():
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cmd += ['--header', '%s: %s' % (key, val)]
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cmd += ['--', info_dict['url']]
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return cmd
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class Aria2cFD(ExternalFD):
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def _make_cmd(self, tmpfilename, info_dict):
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cmd = [
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self.exe, '-c',
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'--min-split-size', '1M', '--max-connection-per-server', '4']
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dn = os.path.dirname(tmpfilename)
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if dn:
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cmd += ['--dir', dn]
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cmd += ['--out', os.path.basename(tmpfilename)]
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for key, val in self._calc_headers(info_dict).items():
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cmd += ['--header', '%s: %s' % (key, val)]
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cmd += ['--', info_dict['url']]
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return cmd
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_BY_NAME = dict(
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(klass.get_basename(), klass)
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for name, klass in globals().items()
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if name.endswith('FD') and name != 'ExternalFD'
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)
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def list_external_downloaders():
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return sorted(_BY_NAME.keys())
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def get_external_downloader(external_downloader):
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""" Given the name of the executable, see whether we support the given
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downloader . """
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bn = os.path.basename(external_downloader)
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return _BY_NAME[bn]
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