1 from __future__ import unicode_literals
9 from .common import FileDownloader
10 from ..compat import (
11 compat_urllib_request,
21 class HttpFD(FileDownloader):
22 def real_download(self, filename, info_dict):
23 url = info_dict['url']
24 tmpfilename = self.temp_name(filename)
27 # Do not include the Accept-Encoding header
28 headers = {'Youtubedl-no-compression': 'True'}
29 add_headers = info_dict.get('http_headers')
31 headers.update(add_headers)
32 basic_request = compat_urllib_request.Request(url, None, headers)
33 request = compat_urllib_request.Request(url, None, headers)
35 is_test = self.params.get('test', False)
38 request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1))
40 # Establish possible resume length
41 if os.path.isfile(encodeFilename(tmpfilename)):
42 resume_len = os.path.getsize(encodeFilename(tmpfilename))
48 if self.params.get('continuedl', True):
49 self.report_resuming_byte(resume_len)
50 request.add_header('Range', 'bytes=%d-' % resume_len)
56 retries = self.params.get('retries', 0)
57 while count <= retries:
58 # Establish connection
60 data = self.ydl.urlopen(request)
62 content_range = data.headers.get('Content-Range')
64 content_range_m = re.search(r'bytes (\d+)-', content_range)
65 # Content-Range is correct - go on
66 if content_range_m and resume_len == int(content_range_m.group(1)):
68 # Content-Range is invalid - wipe the file and do entire redownload
69 self.report_unable_to_resume()
73 except (compat_urllib_error.HTTPError, ) as err:
74 if (err.code < 500 or err.code >= 600) and err.code != 416:
75 # Unexpected HTTP error
78 # Unable to resume (requested range not satisfiable)
80 # Open the connection again without the range header
81 data = self.ydl.urlopen(basic_request)
82 content_length = data.info()['Content-Length']
83 except (compat_urllib_error.HTTPError, ) as err:
84 if err.code < 500 or err.code >= 600:
87 # Examine the reported length
88 if (content_length is not None and
89 (resume_len - 100 < int(content_length) < resume_len + 100)):
90 # The file had already been fully downloaded.
91 # Explanation to the above condition: in issue #175 it was revealed that
92 # YouTube sometimes adds or removes a few bytes from the end of the file,
93 # changing the file size slightly and causing problems for some users. So
94 # I decided to implement a suggested change and consider the file
95 # completely downloaded if the file size differs less than 100 bytes from
96 # the one in the hard drive.
97 self.report_file_already_downloaded(filename)
98 self.try_rename(tmpfilename, filename)
100 'filename': filename,
101 'status': 'finished',
102 'downloaded_bytes': resume_len,
103 'total_bytes': resume_len,
107 # The length does not match, we start the download over
108 self.report_unable_to_resume()
112 except socket.error as e:
113 if e.errno != errno.ECONNRESET:
114 # Connection reset is no problem, just retry
120 self.report_retry(count, retries)
123 self.report_error('giving up after %s retries' % retries)
126 data_len = data.info().get('Content-length', None)
128 # Range HTTP header may be ignored/unsupported by a webserver
129 # (e.g. extractor/scivee.py, extractor/bambuser.py).
130 # However, for a test we still would like to download just a piece of a file.
131 # To achieve this we limit data_len to _TEST_FILE_SIZE and manually control
132 # block size when downloading a file.
133 if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE):
134 data_len = self._TEST_FILE_SIZE
136 if data_len is not None:
137 data_len = int(data_len) + resume_len
138 min_data_len = self.params.get("min_filesize", None)
139 max_data_len = self.params.get("max_filesize", None)
140 if min_data_len is not None and data_len < min_data_len:
141 self.to_screen('\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
143 if max_data_len is not None and data_len > max_data_len:
144 self.to_screen('\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
147 byte_counter = 0 + resume_len
148 block_size = self.params.get('buffersize', 1024)
151 # measure time over whole while-loop, so slow_down() and best_block_size() work together properly
152 now = None # needed for slow_down() in the first loop run
153 before = start # start measuring
157 data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
158 byte_counter += len(data_block)
160 # exit loop when download is finished
161 if len(data_block) == 0:
164 # Open destination file just in time
167 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
168 assert stream is not None
169 filename = self.undo_temp_name(tmpfilename)
170 self.report_destination(filename)
171 except (OSError, IOError) as err:
172 self.report_error('unable to open for writing: %s' % str(err))
175 if self.params.get('xattr_set_filesize', False) and data_len is not None:
178 xattr.setxattr(tmpfilename, 'user.ytdl.filesize', str(data_len))
179 except(OSError, IOError, ImportError) as err:
180 self.report_error('unable to set filesize xattr: %s' % str(err))
183 stream.write(data_block)
184 except (IOError, OSError) as err:
186 self.report_error('unable to write data: %s' % str(err))
190 self.slow_down(start, now, byte_counter - resume_len)
192 # end measuring of one loop run
197 if not self.params.get('noresizebuffer', False):
198 block_size = self.best_block_size(after - before, len(data_block))
203 speed = self.calc_speed(start, now, byte_counter - resume_len)
207 eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
209 self._hook_progress({
210 'status': 'downloading',
211 'downloaded_bytes': byte_counter,
212 'total_bytes': data_len,
213 'tmpfilename': tmpfilename,
214 'filename': filename,
217 'elapsed': now - start,
220 if is_test and byte_counter == data_len:
225 self.report_error('Did not get any data blocks')
227 if tmpfilename != '-':
230 if data_len is not None and byte_counter != data_len:
231 raise ContentTooShortError(byte_counter, int(data_len))
232 self.try_rename(tmpfilename, filename)
234 # Update file modification time
235 if self.params.get('updatetime', True):
236 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
238 self._hook_progress({
239 'downloaded_bytes': byte_counter,
240 'total_bytes': byte_counter,
241 'filename': filename,
242 'status': 'finished',
243 'elapsed': time.time() - start,