Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/network/download.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Download files with progress indicators. |
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2 """ |
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3 import cgi |
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4 import logging |
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5 import mimetypes |
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6 import os |
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7 |
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8 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE |
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9 |
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10 from pip._internal.cli.progress_bars import DownloadProgressProvider |
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11 from pip._internal.exceptions import NetworkConnectionError |
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12 from pip._internal.models.index import PyPI |
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13 from pip._internal.network.cache import is_from_cache |
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14 from pip._internal.network.utils import HEADERS, raise_for_status, response_chunks |
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15 from pip._internal.utils.misc import format_size, redact_auth_from_url, splitext |
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16 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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17 |
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18 if MYPY_CHECK_RUNNING: |
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19 from typing import Iterable, Optional, Tuple |
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20 |
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21 from pip._vendor.requests.models import Response |
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22 |
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23 from pip._internal.models.link import Link |
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24 from pip._internal.network.session import PipSession |
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25 |
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26 logger = logging.getLogger(__name__) |
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27 |
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28 |
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29 def _get_http_response_size(resp): |
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30 # type: (Response) -> Optional[int] |
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31 try: |
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32 return int(resp.headers['content-length']) |
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33 except (ValueError, KeyError, TypeError): |
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34 return None |
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35 |
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36 |
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37 def _prepare_download( |
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38 resp, # type: Response |
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39 link, # type: Link |
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40 progress_bar # type: str |
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41 ): |
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42 # type: (...) -> Iterable[bytes] |
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43 total_length = _get_http_response_size(resp) |
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44 |
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45 if link.netloc == PyPI.file_storage_domain: |
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46 url = link.show_url |
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47 else: |
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48 url = link.url_without_fragment |
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49 |
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50 logged_url = redact_auth_from_url(url) |
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51 |
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52 if total_length: |
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53 logged_url = '{} ({})'.format(logged_url, format_size(total_length)) |
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54 |
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55 if is_from_cache(resp): |
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56 logger.info("Using cached %s", logged_url) |
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57 else: |
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58 logger.info("Downloading %s", logged_url) |
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59 |
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60 if logger.getEffectiveLevel() > logging.INFO: |
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61 show_progress = False |
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62 elif is_from_cache(resp): |
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63 show_progress = False |
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64 elif not total_length: |
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65 show_progress = True |
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66 elif total_length > (40 * 1000): |
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67 show_progress = True |
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68 else: |
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69 show_progress = False |
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70 |
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71 chunks = response_chunks(resp, CONTENT_CHUNK_SIZE) |
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72 |
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73 if not show_progress: |
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74 return chunks |
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75 |
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76 return DownloadProgressProvider( |
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77 progress_bar, max=total_length |
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78 )(chunks) |
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79 |
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80 |
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81 def sanitize_content_filename(filename): |
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82 # type: (str) -> str |
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83 """ |
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84 Sanitize the "filename" value from a Content-Disposition header. |
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85 """ |
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86 return os.path.basename(filename) |
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87 |
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88 |
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89 def parse_content_disposition(content_disposition, default_filename): |
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90 # type: (str, str) -> str |
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91 """ |
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92 Parse the "filename" value from a Content-Disposition header, and |
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93 return the default filename if the result is empty. |
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94 """ |
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95 _type, params = cgi.parse_header(content_disposition) |
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96 filename = params.get('filename') |
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97 if filename: |
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98 # We need to sanitize the filename to prevent directory traversal |
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99 # in case the filename contains ".." path parts. |
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100 filename = sanitize_content_filename(filename) |
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101 return filename or default_filename |
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102 |
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103 |
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104 def _get_http_response_filename(resp, link): |
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105 # type: (Response, Link) -> str |
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106 """Get an ideal filename from the given HTTP response, falling back to |
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107 the link filename if not provided. |
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108 """ |
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109 filename = link.filename # fallback |
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110 # Have a look at the Content-Disposition header for a better guess |
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111 content_disposition = resp.headers.get('content-disposition') |
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112 if content_disposition: |
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113 filename = parse_content_disposition(content_disposition, filename) |
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114 ext = splitext(filename)[1] # type: Optional[str] |
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115 if not ext: |
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116 ext = mimetypes.guess_extension( |
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117 resp.headers.get('content-type', '') |
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118 ) |
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119 if ext: |
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120 filename += ext |
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121 if not ext and link.url != resp.url: |
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122 ext = os.path.splitext(resp.url)[1] |
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123 if ext: |
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124 filename += ext |
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125 return filename |
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126 |
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127 |
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128 def _http_get_download(session, link): |
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129 # type: (PipSession, Link) -> Response |
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130 target_url = link.url.split('#', 1)[0] |
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131 resp = session.get(target_url, headers=HEADERS, stream=True) |
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132 raise_for_status(resp) |
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133 return resp |
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134 |
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135 |
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136 class Downloader: |
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137 def __init__( |
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138 self, |
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139 session, # type: PipSession |
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140 progress_bar, # type: str |
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141 ): |
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142 # type: (...) -> None |
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143 self._session = session |
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144 self._progress_bar = progress_bar |
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145 |
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146 def __call__(self, link, location): |
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147 # type: (Link, str) -> Tuple[str, str] |
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148 """Download the file given by link into location.""" |
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149 try: |
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150 resp = _http_get_download(self._session, link) |
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151 except NetworkConnectionError as e: |
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152 assert e.response is not None |
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153 logger.critical( |
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154 "HTTP error %s while getting %s", e.response.status_code, link |
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155 ) |
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156 raise |
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157 |
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158 filename = _get_http_response_filename(resp, link) |
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159 filepath = os.path.join(location, filename) |
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160 |
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161 chunks = _prepare_download(resp, link, self._progress_bar) |
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162 with open(filepath, 'wb') as content_file: |
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163 for chunk in chunks: |
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164 content_file.write(chunk) |
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165 content_type = resp.headers.get('Content-Type', '') |
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166 return filepath, content_type |
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167 |
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168 |
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169 class BatchDownloader: |
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170 |
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171 def __init__( |
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172 self, |
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173 session, # type: PipSession |
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174 progress_bar, # type: str |
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175 ): |
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176 # type: (...) -> None |
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177 self._session = session |
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178 self._progress_bar = progress_bar |
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179 |
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180 def __call__(self, links, location): |
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181 # type: (Iterable[Link], str) -> Iterable[Tuple[str, Tuple[str, str]]] |
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182 """Download the files given by links into location.""" |
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183 for link in links: |
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184 try: |
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185 resp = _http_get_download(self._session, link) |
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186 except NetworkConnectionError as e: |
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187 assert e.response is not None |
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188 logger.critical( |
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189 "HTTP error %s while getting %s", |
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190 e.response.status_code, link, |
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191 ) |
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192 raise |
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193 |
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194 filename = _get_http_response_filename(resp, link) |
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195 filepath = os.path.join(location, filename) |
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196 |
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197 chunks = _prepare_download(resp, link, self._progress_bar) |
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198 with open(filepath, 'wb') as content_file: |
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199 for chunk in chunks: |
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200 content_file.write(chunk) |
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201 content_type = resp.headers.get('Content-Type', '') |
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202 yield link.url, (filepath, content_type) |