1 from __future__ import unicode_literals
9 from .common import FileDownloader
10 from ..compat import compat_urllib_error
18 XAttrUnavailableError,
22 class HttpFD(FileDownloader):
23 def real_download(self, filename_or_stream, info_dict):
24 url = info_dict['url']
25 filename = filename_or_stream
27 if hasattr(filename_or_stream, 'write'):
28 stream = filename_or_stream
30 tmpfilename = self.temp_name(filename)
32 # Do not include the Accept-Encoding header
33 headers = {'Youtubedl-no-compression': 'True'}
34 add_headers = info_dict.get('http_headers')
36 headers.update(add_headers)
37 basic_request = sanitized_Request(url, None, headers)
38 request = sanitized_Request(url, None, headers)
40 is_test = self.params.get('test', False)
43 request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1))
45 # Establish possible resume length
46 if os.path.isfile(encodeFilename(tmpfilename)):
47 resume_len = os.path.getsize(encodeFilename(tmpfilename))
53 if self.params.get('continuedl', True):
54 self.report_resuming_byte(resume_len)
55 request.add_header('Range', 'bytes=%d-' % resume_len)
61 retries = self.params.get('retries', 0)
62 while count <= retries:
63 # Establish connection
65 data = self.ydl.urlopen(request)
66 # When trying to resume, Content-Range HTTP header of response has to be checked
67 # to match the value of requested Range HTTP header. This is due to a webservers
68 # that don't support resuming and serve a whole file with no Content-Range
69 # set in response despite of requested Range (see
70 # https://github.com/rg3/youtube-dl/issues/6057#issuecomment-126129799)
72 content_range = data.headers.get('Content-Range')
74 content_range_m = re.search(r'bytes (\d+)-', content_range)
75 # Content-Range is present and matches requested Range, resume is possible
76 if content_range_m and resume_len == int(content_range_m.group(1)):
78 # Content-Range is either not present or invalid. Assuming remote webserver is
79 # trying to send the whole file, resume is not possible, so wiping the local file
80 # and performing entire redownload
81 self.report_unable_to_resume()
85 except (compat_urllib_error.HTTPError, ) as err:
86 if (err.code < 500 or err.code >= 600) and err.code != 416:
87 # Unexpected HTTP error
90 # Unable to resume (requested range not satisfiable)
92 # Open the connection again without the range header
93 data = self.ydl.urlopen(basic_request)
94 content_length = data.info()['Content-Length']
95 except (compat_urllib_error.HTTPError, ) as err:
96 if err.code < 500 or err.code >= 600:
99 # Examine the reported length
100 if (content_length is not None and
101 (resume_len - 100 < int(content_length) < resume_len + 100)):
102 # The file had already been fully downloaded.
103 # Explanation to the above condition: in issue #175 it was revealed that
104 # YouTube sometimes adds or removes a few bytes from the end of the file,
105 # changing the file size slightly and causing problems for some users. So
106 # I decided to implement a suggested change and consider the file
107 # completely downloaded if the file size differs less than 100 bytes from
108 # the one in the hard drive.
109 self.report_file_already_downloaded(filename)
110 self.try_rename(tmpfilename, filename)
111 self._hook_progress({
112 'filename': filename,
113 'status': 'finished',
114 'downloaded_bytes': resume_len,
115 'total_bytes': resume_len,
119 # The length does not match, we start the download over
120 self.report_unable_to_resume()
124 except socket.error as e:
125 if e.errno != errno.ECONNRESET:
126 # Connection reset is no problem, just retry
132 self.report_retry(count, retries)
135 self.report_error('giving up after %s retries' % retries)
138 data_len = data.info().get('Content-length', None)
140 # Range HTTP header may be ignored/unsupported by a webserver
141 # (e.g. extractor/scivee.py, extractor/bambuser.py).
142 # However, for a test we still would like to download just a piece of a file.
143 # To achieve this we limit data_len to _TEST_FILE_SIZE and manually control
144 # block size when downloading a file.
145 if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE):
146 data_len = self._TEST_FILE_SIZE
148 if data_len is not None:
149 data_len = int(data_len) + resume_len
150 min_data_len = self.params.get('min_filesize')
151 max_data_len = self.params.get('max_filesize')
152 if min_data_len is not None and data_len < min_data_len:
153 self.to_screen('\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
155 if max_data_len is not None and data_len > max_data_len:
156 self.to_screen('\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
159 byte_counter = 0 + resume_len
160 block_size = self.params.get('buffersize', 1024)
163 # measure time over whole while-loop, so slow_down() and best_block_size() work together properly
164 now = None # needed for slow_down() in the first loop run
165 before = start # start measuring
169 data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
170 byte_counter += len(data_block)
172 # exit loop when download is finished
173 if len(data_block) == 0:
176 # Open destination file just in time
179 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
180 assert stream is not None
181 filename = self.undo_temp_name(tmpfilename)
182 self.report_destination(filename)
183 except (OSError, IOError) as err:
184 self.report_error('unable to open for writing: %s' % str(err))
187 if self.params.get('xattr_set_filesize', False) and data_len is not None:
189 write_xattr(tmpfilename, 'user.ytdl.filesize', str(data_len).encode('utf-8'))
190 except (XAttrUnavailableError, XAttrMetadataError) as err:
191 self.report_error('unable to set filesize xattr: %s' % str(err))
194 stream.write(data_block)
195 except (IOError, OSError) as err:
197 self.report_error('unable to write data: %s' % str(err))
201 self.slow_down(start, now, byte_counter - resume_len)
203 # end measuring of one loop run
208 if not self.params.get('noresizebuffer', False):
209 block_size = self.best_block_size(after - before, len(data_block))
214 speed = self.calc_speed(start, now, byte_counter - resume_len)
218 eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
220 self._hook_progress({
221 'status': 'downloading',
222 'downloaded_bytes': byte_counter,
223 'total_bytes': data_len,
224 'tmpfilename': tmpfilename,
225 'filename': filename,
228 'elapsed': now - start,
231 if is_test and byte_counter == data_len:
236 self.report_error('Did not get any data blocks')
238 if tmpfilename != '-':
241 if data_len is not None and byte_counter != data_len:
242 raise ContentTooShortError(byte_counter, int(data_len))
243 self.try_rename(tmpfilename, filename)
245 # Update file modification time
246 if self.params.get('updatetime', True):
247 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
249 self._hook_progress({
250 'downloaded_bytes': byte_counter,
251 'total_bytes': byte_counter,
252 'filename': filename,
253 'status': 'finished',
254 'elapsed': time.time() - start,