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3bc2ddcc | 1 | import os |
3bc2ddcc JMF |
2 | import time |
3 | ||
4 | from .common import FileDownloader | |
5 | from ..utils import ( | |
6 | compat_urllib_request, | |
7 | compat_urllib_error, | |
8 | ContentTooShortError, | |
9 | ||
10 | encodeFilename, | |
11 | sanitize_open, | |
12 | format_bytes, | |
13 | ) | |
14 | ||
15 | ||
16 | class HttpFD(FileDownloader): | |
17 | def real_download(self, filename, info_dict): | |
18 | url = info_dict['url'] | |
19 | tmpfilename = self.temp_name(filename) | |
20 | stream = None | |
21 | ||
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'] | |
a59e40a1 S |
26 | if 'http_referer' in info_dict: |
27 | headers['Referer'] = info_dict['http_referer'] | |
d769be6c PH |
28 | add_headers = info_dict.get('http_headers') |
29 | if add_headers: | |
30 | headers.update(add_headers) | |
31 | data = info_dict.get('http_post_data') | |
32 | http_method = info_dict.get('http_method') | |
33 | basic_request = compat_urllib_request.Request(url, data, headers) | |
34 | request = compat_urllib_request.Request(url, data, headers) | |
35 | if http_method is not None: | |
36 | basic_request.get_method = lambda: http_method | |
37 | request.get_method = lambda: http_method | |
3bc2ddcc | 38 | |
df297c87 S |
39 | is_test = self.params.get('test', False) |
40 | ||
41 | if is_test: | |
42 | request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1)) | |
3bc2ddcc JMF |
43 | |
44 | # Establish possible resume length | |
45 | if os.path.isfile(encodeFilename(tmpfilename)): | |
46 | resume_len = os.path.getsize(encodeFilename(tmpfilename)) | |
47 | else: | |
48 | resume_len = 0 | |
49 | ||
50 | open_mode = 'wb' | |
51 | if resume_len != 0: | |
52 | if self.params.get('continuedl', False): | |
53 | self.report_resuming_byte(resume_len) | |
f89197d7 | 54 | request.add_header('Range', 'bytes=%d-' % resume_len) |
3bc2ddcc JMF |
55 | open_mode = 'ab' |
56 | else: | |
57 | resume_len = 0 | |
58 | ||
59 | count = 0 | |
60 | retries = self.params.get('retries', 0) | |
61 | while count <= retries: | |
62 | # Establish connection | |
63 | try: | |
22ff5d21 | 64 | data = self.ydl.urlopen(request) |
3bc2ddcc JMF |
65 | break |
66 | except (compat_urllib_error.HTTPError, ) as err: | |
67 | if (err.code < 500 or err.code >= 600) and err.code != 416: | |
68 | # Unexpected HTTP error | |
69 | raise | |
70 | elif err.code == 416: | |
71 | # Unable to resume (requested range not satisfiable) | |
72 | try: | |
73 | # Open the connection again without the range header | |
22ff5d21 | 74 | data = self.ydl.urlopen(basic_request) |
3bc2ddcc JMF |
75 | content_length = data.info()['Content-Length'] |
76 | except (compat_urllib_error.HTTPError, ) as err: | |
77 | if err.code < 500 or err.code >= 600: | |
78 | raise | |
79 | else: | |
80 | # Examine the reported length | |
81 | if (content_length is not None and | |
82 | (resume_len - 100 < int(content_length) < resume_len + 100)): | |
83 | # The file had already been fully downloaded. | |
84 | # Explanation to the above condition: in issue #175 it was revealed that | |
85 | # YouTube sometimes adds or removes a few bytes from the end of the file, | |
86 | # changing the file size slightly and causing problems for some users. So | |
87 | # I decided to implement a suggested change and consider the file | |
88 | # completely downloaded if the file size differs less than 100 bytes from | |
89 | # the one in the hard drive. | |
90 | self.report_file_already_downloaded(filename) | |
91 | self.try_rename(tmpfilename, filename) | |
92 | self._hook_progress({ | |
93 | 'filename': filename, | |
94 | 'status': 'finished', | |
95 | }) | |
96 | return True | |
97 | else: | |
98 | # The length does not match, we start the download over | |
99 | self.report_unable_to_resume() | |
60daf7f0 | 100 | resume_len = 0 |
3bc2ddcc JMF |
101 | open_mode = 'wb' |
102 | break | |
103 | # Retry | |
104 | count += 1 | |
105 | if count <= retries: | |
106 | self.report_retry(count, retries) | |
107 | ||
108 | if count > retries: | |
109 | self.report_error(u'giving up after %s retries' % retries) | |
110 | return False | |
111 | ||
112 | data_len = data.info().get('Content-length', None) | |
df297c87 S |
113 | |
114 | # Range HTTP header may be ignored/unsupported by a webserver | |
115 | # (e.g. extractor/scivee.py, extractor/bambuser.py). | |
116 | # However, for a test we still would like to download just a piece of a file. | |
117 | # To achieve this we limit data_len to _TEST_FILE_SIZE and manually control | |
118 | # block size when downloading a file. | |
32fd27ec | 119 | if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE): |
df297c87 S |
120 | data_len = self._TEST_FILE_SIZE |
121 | ||
3bc2ddcc JMF |
122 | if data_len is not None: |
123 | data_len = int(data_len) + resume_len | |
124 | min_data_len = self.params.get("min_filesize", None) | |
f89197d7 | 125 | max_data_len = self.params.get("max_filesize", None) |
3bc2ddcc JMF |
126 | if min_data_len is not None and data_len < min_data_len: |
127 | self.to_screen(u'\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len)) | |
128 | return False | |
129 | if max_data_len is not None and data_len > max_data_len: | |
130 | self.to_screen(u'\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len)) | |
131 | return False | |
132 | ||
133 | data_len_str = format_bytes(data_len) | |
134 | byte_counter = 0 + resume_len | |
135 | block_size = self.params.get('buffersize', 1024) | |
136 | start = time.time() | |
137 | while True: | |
138 | # Download and write | |
139 | before = time.time() | |
df297c87 | 140 | data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter)) |
3bc2ddcc JMF |
141 | after = time.time() |
142 | if len(data_block) == 0: | |
143 | break | |
144 | byte_counter += len(data_block) | |
145 | ||
146 | # Open file just in time | |
147 | if stream is None: | |
148 | try: | |
149 | (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode) | |
150 | assert stream is not None | |
151 | filename = self.undo_temp_name(tmpfilename) | |
152 | self.report_destination(filename) | |
153 | except (OSError, IOError) as err: | |
154 | self.report_error(u'unable to open for writing: %s' % str(err)) | |
155 | return False | |
156 | try: | |
157 | stream.write(data_block) | |
7976fcac | 158 | except (IOError, OSError) as err: |
3bc2ddcc JMF |
159 | self.to_stderr(u"\n") |
160 | self.report_error(u'unable to write data: %s' % str(err)) | |
161 | return False | |
162 | if not self.params.get('noresizebuffer', False): | |
163 | block_size = self.best_block_size(after - before, len(data_block)) | |
164 | ||
165 | # Progress message | |
166 | speed = self.calc_speed(start, time.time(), byte_counter - resume_len) | |
167 | if data_len is None: | |
168 | eta = percent = None | |
169 | else: | |
170 | percent = self.calc_percent(byte_counter, data_len) | |
171 | eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len) | |
172 | self.report_progress(percent, data_len_str, speed, eta) | |
173 | ||
174 | self._hook_progress({ | |
175 | 'downloaded_bytes': byte_counter, | |
176 | 'total_bytes': data_len, | |
177 | 'tmpfilename': tmpfilename, | |
178 | 'filename': filename, | |
179 | 'status': 'downloading', | |
180 | 'eta': eta, | |
181 | 'speed': speed, | |
182 | }) | |
183 | ||
df297c87 S |
184 | if is_test and byte_counter == data_len: |
185 | break | |
186 | ||
3bc2ddcc JMF |
187 | # Apply rate limit |
188 | self.slow_down(start, byte_counter - resume_len) | |
189 | ||
190 | if stream is None: | |
191 | self.to_stderr(u"\n") | |
192 | self.report_error(u'Did not get any data blocks') | |
193 | return False | |
88a23aef S |
194 | if tmpfilename != u'-': |
195 | stream.close() | |
3bc2ddcc JMF |
196 | self.report_finish(data_len_str, (time.time() - start)) |
197 | if data_len is not None and byte_counter != data_len: | |
198 | raise ContentTooShortError(byte_counter, int(data_len)) | |
199 | self.try_rename(tmpfilename, filename) | |
200 | ||
201 | # Update file modification time | |
202 | if self.params.get('updatetime', True): | |
203 | info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None)) | |
204 | ||
205 | self._hook_progress({ | |
206 | 'downloaded_bytes': byte_counter, | |
207 | 'total_bytes': byte_counter, | |
208 | 'filename': filename, | |
209 | 'status': 'finished', | |
210 | }) | |
211 | ||
212 | return True |