4 from .common import FileDownloader
16 class HttpFD(FileDownloader):
17 def real_download(self, filename, info_dict):
18 url = info_dict['url']
19 tmpfilename = self.temp_name(filename)
22 # Do not include the Accept-Encoding header
23 headers = {'Youtubedl-no-compression': 'True'}
24 if 'user_agent' in info_dict:
25 headers['Youtubedl-user-agent'] = info_dict['user_agent']
26 if 'http_referer' in info_dict:
27 headers['Referer'] = info_dict['http_referer']
28 basic_request = compat_urllib_request.Request(url, None, headers)
29 request = compat_urllib_request.Request(url, None, headers)
31 if self.params.get('test', False):
32 request.add_header('Range', 'bytes=0-10240')
34 # Establish possible resume length
35 if os.path.isfile(encodeFilename(tmpfilename)):
36 resume_len = os.path.getsize(encodeFilename(tmpfilename))
42 if self.params.get('continuedl', False):
43 self.report_resuming_byte(resume_len)
44 request.add_header('Range', 'bytes=%d-' % resume_len)
50 retries = self.params.get('retries', 0)
51 while count <= retries:
52 # Establish connection
54 data = self.ydl.urlopen(request)
56 except (compat_urllib_error.HTTPError, ) as err:
57 if (err.code < 500 or err.code >= 600) and err.code != 416:
58 # Unexpected HTTP error
61 # Unable to resume (requested range not satisfiable)
63 # Open the connection again without the range header
64 data = self.ydl.urlopen(basic_request)
65 content_length = data.info()['Content-Length']
66 except (compat_urllib_error.HTTPError, ) as err:
67 if err.code < 500 or err.code >= 600:
70 # Examine the reported length
71 if (content_length is not None and
72 (resume_len - 100 < int(content_length) < resume_len + 100)):
73 # The file had already been fully downloaded.
74 # Explanation to the above condition: in issue #175 it was revealed that
75 # YouTube sometimes adds or removes a few bytes from the end of the file,
76 # changing the file size slightly and causing problems for some users. So
77 # I decided to implement a suggested change and consider the file
78 # completely downloaded if the file size differs less than 100 bytes from
79 # the one in the hard drive.
80 self.report_file_already_downloaded(filename)
81 self.try_rename(tmpfilename, filename)
88 # The length does not match, we start the download over
89 self.report_unable_to_resume()
96 self.report_retry(count, retries)
99 self.report_error(u'giving up after %s retries' % retries)
102 data_len = data.info().get('Content-length', None)
103 if data_len is not None:
104 data_len = int(data_len) + resume_len
105 min_data_len = self.params.get("min_filesize", None)
106 max_data_len = self.params.get("max_filesize", None)
107 if min_data_len is not None and data_len < min_data_len:
108 self.to_screen(u'\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
110 if max_data_len is not None and data_len > max_data_len:
111 self.to_screen(u'\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
114 data_len_str = format_bytes(data_len)
115 byte_counter = 0 + resume_len
116 block_size = self.params.get('buffersize', 1024)
121 data_block = data.read(block_size)
123 if len(data_block) == 0:
125 byte_counter += len(data_block)
127 # Open file just in time
130 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
131 assert stream is not None
132 filename = self.undo_temp_name(tmpfilename)
133 self.report_destination(filename)
134 except (OSError, IOError) as err:
135 self.report_error(u'unable to open for writing: %s' % str(err))
138 stream.write(data_block)
139 except (IOError, OSError) as err:
140 self.to_stderr(u"\n")
141 self.report_error(u'unable to write data: %s' % str(err))
143 if not self.params.get('noresizebuffer', False):
144 block_size = self.best_block_size(after - before, len(data_block))
147 speed = self.calc_speed(start, time.time(), byte_counter - resume_len)
151 percent = self.calc_percent(byte_counter, data_len)
152 eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
153 self.report_progress(percent, data_len_str, speed, eta)
155 self._hook_progress({
156 'downloaded_bytes': byte_counter,
157 'total_bytes': data_len,
158 'tmpfilename': tmpfilename,
159 'filename': filename,
160 'status': 'downloading',
166 self.slow_down(start, byte_counter - resume_len)
169 self.to_stderr(u"\n")
170 self.report_error(u'Did not get any data blocks')
173 self.report_finish(data_len_str, (time.time() - start))
174 if data_len is not None and byte_counter != data_len:
175 raise ContentTooShortError(byte_counter, int(data_len))
176 self.try_rename(tmpfilename, filename)
178 # Update file modification time
179 if self.params.get('updatetime', True):
180 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
182 self._hook_progress({
183 'downloaded_bytes': byte_counter,
184 'total_bytes': byte_counter,
185 'filename': filename,
186 'status': 'finished',