]> Raphaƫl G. Git Repositories - youtubedl/blob - youtube_dl/downloader/http.py
Prepare for upload.
[youtubedl] / youtube_dl / downloader / http.py
1 from __future__ import unicode_literals
2
3 import os
4 import time
5
6 from .common import FileDownloader
7 from ..utils import (
8 compat_urllib_request,
9 compat_urllib_error,
10 ContentTooShortError,
11
12 encodeFilename,
13 sanitize_open,
14 format_bytes,
15 )
16
17
18 class HttpFD(FileDownloader):
19 def real_download(self, filename, info_dict):
20 url = info_dict['url']
21 tmpfilename = self.temp_name(filename)
22 stream = None
23
24 # Do not include the Accept-Encoding header
25 headers = {'Youtubedl-no-compression': 'True'}
26 if 'user_agent' in info_dict:
27 headers['Youtubedl-user-agent'] = info_dict['user_agent']
28 if 'http_referer' in info_dict:
29 headers['Referer'] = info_dict['http_referer']
30 add_headers = info_dict.get('http_headers')
31 if add_headers:
32 headers.update(add_headers)
33 data = info_dict.get('http_post_data')
34 http_method = info_dict.get('http_method')
35 basic_request = compat_urllib_request.Request(url, data, headers)
36 request = compat_urllib_request.Request(url, data, headers)
37 if http_method is not None:
38 basic_request.get_method = lambda: http_method
39 request.get_method = lambda: http_method
40
41 is_test = self.params.get('test', False)
42
43 if is_test:
44 request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1))
45
46 # Establish possible resume length
47 if os.path.isfile(encodeFilename(tmpfilename)):
48 resume_len = os.path.getsize(encodeFilename(tmpfilename))
49 else:
50 resume_len = 0
51
52 open_mode = 'wb'
53 if resume_len != 0:
54 if self.params.get('continuedl', False):
55 self.report_resuming_byte(resume_len)
56 request.add_header('Range', 'bytes=%d-' % resume_len)
57 open_mode = 'ab'
58 else:
59 resume_len = 0
60
61 count = 0
62 retries = self.params.get('retries', 0)
63 while count <= retries:
64 # Establish connection
65 try:
66 data = self.ydl.urlopen(request)
67 break
68 except (compat_urllib_error.HTTPError, ) as err:
69 if (err.code < 500 or err.code >= 600) and err.code != 416:
70 # Unexpected HTTP error
71 raise
72 elif err.code == 416:
73 # Unable to resume (requested range not satisfiable)
74 try:
75 # Open the connection again without the range header
76 data = self.ydl.urlopen(basic_request)
77 content_length = data.info()['Content-Length']
78 except (compat_urllib_error.HTTPError, ) as err:
79 if err.code < 500 or err.code >= 600:
80 raise
81 else:
82 # Examine the reported length
83 if (content_length is not None and
84 (resume_len - 100 < int(content_length) < resume_len + 100)):
85 # The file had already been fully downloaded.
86 # Explanation to the above condition: in issue #175 it was revealed that
87 # YouTube sometimes adds or removes a few bytes from the end of the file,
88 # changing the file size slightly and causing problems for some users. So
89 # I decided to implement a suggested change and consider the file
90 # completely downloaded if the file size differs less than 100 bytes from
91 # the one in the hard drive.
92 self.report_file_already_downloaded(filename)
93 self.try_rename(tmpfilename, filename)
94 self._hook_progress({
95 'filename': filename,
96 'status': 'finished',
97 })
98 return True
99 else:
100 # The length does not match, we start the download over
101 self.report_unable_to_resume()
102 resume_len = 0
103 open_mode = 'wb'
104 break
105 # Retry
106 count += 1
107 if count <= retries:
108 self.report_retry(count, retries)
109
110 if count > retries:
111 self.report_error('giving up after %s retries' % retries)
112 return False
113
114 data_len = data.info().get('Content-length', None)
115
116 # Range HTTP header may be ignored/unsupported by a webserver
117 # (e.g. extractor/scivee.py, extractor/bambuser.py).
118 # However, for a test we still would like to download just a piece of a file.
119 # To achieve this we limit data_len to _TEST_FILE_SIZE and manually control
120 # block size when downloading a file.
121 if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE):
122 data_len = self._TEST_FILE_SIZE
123
124 if data_len is not None:
125 data_len = int(data_len) + resume_len
126 min_data_len = self.params.get("min_filesize", None)
127 max_data_len = self.params.get("max_filesize", None)
128 if min_data_len is not None and data_len < min_data_len:
129 self.to_screen('\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
130 return False
131 if max_data_len is not None and data_len > max_data_len:
132 self.to_screen('\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
133 return False
134
135 data_len_str = format_bytes(data_len)
136 byte_counter = 0 + resume_len
137 block_size = self.params.get('buffersize', 1024)
138 start = time.time()
139 while True:
140 # Download and write
141 before = time.time()
142 data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
143 after = time.time()
144 if len(data_block) == 0:
145 break
146 byte_counter += len(data_block)
147
148 # Open file just in time
149 if stream is None:
150 try:
151 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
152 assert stream is not None
153 filename = self.undo_temp_name(tmpfilename)
154 self.report_destination(filename)
155 except (OSError, IOError) as err:
156 self.report_error('unable to open for writing: %s' % str(err))
157 return False
158 try:
159 stream.write(data_block)
160 except (IOError, OSError) as err:
161 self.to_stderr('\n')
162 self.report_error('unable to write data: %s' % str(err))
163 return False
164 if not self.params.get('noresizebuffer', False):
165 block_size = self.best_block_size(after - before, len(data_block))
166
167 # Progress message
168 speed = self.calc_speed(start, time.time(), byte_counter - resume_len)
169 if data_len is None:
170 eta = percent = None
171 else:
172 percent = self.calc_percent(byte_counter, data_len)
173 eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
174 self.report_progress(percent, data_len_str, speed, eta)
175
176 self._hook_progress({
177 'downloaded_bytes': byte_counter,
178 'total_bytes': data_len,
179 'tmpfilename': tmpfilename,
180 'filename': filename,
181 'status': 'downloading',
182 'eta': eta,
183 'speed': speed,
184 })
185
186 if is_test and byte_counter == data_len:
187 break
188
189 # Apply rate limit
190 self.slow_down(start, byte_counter - resume_len)
191
192 if stream is None:
193 self.to_stderr('\n')
194 self.report_error('Did not get any data blocks')
195 return False
196 if tmpfilename != '-':
197 stream.close()
198 self.report_finish(data_len_str, (time.time() - start))
199 if data_len is not None and byte_counter != data_len:
200 raise ContentTooShortError(byte_counter, int(data_len))
201 self.try_rename(tmpfilename, filename)
202
203 # Update file modification time
204 if self.params.get('updatetime', True):
205 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
206
207 self._hook_progress({
208 'downloaded_bytes': byte_counter,
209 'total_bytes': byte_counter,
210 'filename': filename,
211 'status': 'finished',
212 })
213
214 return True