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)
63 content_range = data.headers.get('Content-Range')
65 content_range_m = re.search(r'bytes (\d+)-', content_range)
67 # Content-Range is correct - go on
68 if resume_len == int(content_range_m.group(1)):
71 # Content-Range is invalid - wipe the file and do entire redownload
76 except (compat_urllib_error.HTTPError, ) as err:
77 if (err.code < 500 or err.code >= 600) and err.code != 416:
78 # Unexpected HTTP error
81 # Unable to resume (requested range not satisfiable)
83 # Open the connection again without the range header
84 data = self.ydl.urlopen(basic_request)
85 content_length = data.info()['Content-Length']
86 except (compat_urllib_error.HTTPError, ) as err:
87 if err.code < 500 or err.code >= 600:
90 # Examine the reported length
91 if (content_length is not None and
92 (resume_len - 100 < int(content_length) < resume_len + 100)):
93 # The file had already been fully downloaded.
94 # Explanation to the above condition: in issue #175 it was revealed that
95 # YouTube sometimes adds or removes a few bytes from the end of the file,
96 # changing the file size slightly and causing problems for some users. So
97 # I decided to implement a suggested change and consider the file
98 # completely downloaded if the file size differs less than 100 bytes from
99 # the one in the hard drive.
100 self.report_file_already_downloaded(filename)
101 self.try_rename(tmpfilename, filename)
102 self._hook_progress({
103 'filename': filename,
104 'status': 'finished',
105 'downloaded_bytes': resume_len,
106 'total_bytes': resume_len,
110 # The length does not match, we start the download over
111 self.report_unable_to_resume()
115 except socket.error as e:
116 if e.errno != errno.ECONNRESET:
117 # Connection reset is no problem, just retry
123 self.report_retry(count, retries)
126 self.report_error('giving up after %s retries' % retries)
129 data_len = data.info().get('Content-length', None)
131 # Range HTTP header may be ignored/unsupported by a webserver
132 # (e.g. extractor/scivee.py, extractor/bambuser.py).
133 # However, for a test we still would like to download just a piece of a file.
134 # To achieve this we limit data_len to _TEST_FILE_SIZE and manually control
135 # block size when downloading a file.
136 if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE):
137 data_len = self._TEST_FILE_SIZE
139 if data_len is not None:
140 data_len = int(data_len) + resume_len
141 min_data_len = self.params.get("min_filesize", None)
142 max_data_len = self.params.get("max_filesize", None)
143 if min_data_len is not None and data_len < min_data_len:
144 self.to_screen('\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
146 if max_data_len is not None and data_len > max_data_len:
147 self.to_screen('\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
150 byte_counter = 0 + resume_len
151 block_size = self.params.get('buffersize', 1024)
154 # measure time over whole while-loop, so slow_down() and best_block_size() work together properly
155 now = None # needed for slow_down() in the first loop run
156 before = start # start measuring
160 data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
161 byte_counter += len(data_block)
163 # exit loop when download is finished
164 if len(data_block) == 0:
167 # Open destination file just in time
170 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
171 assert stream is not None
172 filename = self.undo_temp_name(tmpfilename)
173 self.report_destination(filename)
174 except (OSError, IOError) as err:
175 self.report_error('unable to open for writing: %s' % str(err))
178 if self.params.get('xattr_set_filesize', False) and data_len is not None:
181 xattr.setxattr(tmpfilename, 'user.ytdl.filesize', str(data_len))
182 except(OSError, IOError, ImportError) as err:
183 self.report_error('unable to set filesize xattr: %s' % str(err))
186 stream.write(data_block)
187 except (IOError, OSError) as err:
189 self.report_error('unable to write data: %s' % str(err))
193 self.slow_down(start, now, byte_counter - resume_len)
195 # end measuring of one loop run
200 if not self.params.get('noresizebuffer', False):
201 block_size = self.best_block_size(after - before, len(data_block))
206 speed = self.calc_speed(start, now, byte_counter - resume_len)
210 eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
212 self._hook_progress({
213 'status': 'downloading',
214 'downloaded_bytes': byte_counter,
215 'total_bytes': data_len,
216 'tmpfilename': tmpfilename,
217 'filename': filename,
220 'elapsed': now - start,
223 if is_test and byte_counter == data_len:
228 self.report_error('Did not get any data blocks')
230 if tmpfilename != '-':
233 if data_len is not None and byte_counter != data_len:
234 raise ContentTooShortError(byte_counter, int(data_len))
235 self.try_rename(tmpfilename, filename)
237 # Update file modification time
238 if self.params.get('updatetime', True):
239 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
241 self._hook_progress({
242 'downloaded_bytes': byte_counter,
243 'total_bytes': byte_counter,
244 'filename': filename,
245 'status': 'finished',
246 'elapsed': time.time() - start,