Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/urllib3/util/request.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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changeset | 1 from __future__ import absolute_import | 
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changeset | 2 | 
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changeset | 3 from base64 import b64encode | 
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changeset | 4 | 
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changeset | 5 from ..exceptions import UnrewindableBodyError | 
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changeset | 6 from ..packages.six import b, integer_types | 
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changeset | 7 | 
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changeset | 8 # Pass as a value within ``headers`` to skip | 
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changeset | 9 # emitting some HTTP headers that are added automatically. | 
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changeset | 10 # The only headers that are supported are ``Accept-Encoding``, | 
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changeset | 11 # ``Host``, and ``User-Agent``. | 
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changeset | 12 SKIP_HEADER = "@@@SKIP_HEADER@@@" | 
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changeset | 13 SKIPPABLE_HEADERS = frozenset(["accept-encoding", "host", "user-agent"]) | 
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changeset | 14 | 
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changeset | 15 ACCEPT_ENCODING = "gzip,deflate" | 
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changeset | 16 try: | 
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changeset | 17 import brotli as _unused_module_brotli # noqa: F401 | 
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changeset | 18 except ImportError: | 
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changeset | 19 pass | 
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changeset | 20 else: | 
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changeset | 21 ACCEPT_ENCODING += ",br" | 
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changeset | 22 | 
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changeset | 23 _FAILEDTELL = object() | 
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changeset | 24 | 
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changeset | 25 | 
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changeset | 26 def make_headers( | 
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changeset | 27 keep_alive=None, | 
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changeset | 28 accept_encoding=None, | 
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changeset | 29 user_agent=None, | 
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changeset | 30 basic_auth=None, | 
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changeset | 31 proxy_basic_auth=None, | 
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changeset | 32 disable_cache=None, | 
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changeset | 33 ): | 
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changeset | 34 """ | 
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changeset | 35 Shortcuts for generating request headers. | 
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changeset | 36 | 
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changeset | 37 :param keep_alive: | 
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changeset | 38 If ``True``, adds 'connection: keep-alive' header. | 
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changeset | 39 | 
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changeset | 40 :param accept_encoding: | 
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changeset | 41 Can be a boolean, list, or string. | 
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changeset | 42 ``True`` translates to 'gzip,deflate'. | 
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changeset | 43 List will get joined by comma. | 
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changeset | 44 String will be used as provided. | 
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changeset | 45 | 
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changeset | 46 :param user_agent: | 
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changeset | 47 String representing the user-agent you want, such as | 
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changeset | 48 "python-urllib3/0.6" | 
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changeset | 49 | 
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changeset | 50 :param basic_auth: | 
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changeset | 51 Colon-separated username:password string for 'authorization: basic ...' | 
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changeset | 52 auth header. | 
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changeset | 53 | 
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changeset | 54 :param proxy_basic_auth: | 
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changeset | 55 Colon-separated username:password string for 'proxy-authorization: basic ...' | 
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changeset | 56 auth header. | 
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changeset | 57 | 
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changeset | 58 :param disable_cache: | 
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changeset | 59 If ``True``, adds 'cache-control: no-cache' header. | 
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changeset | 60 | 
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changeset | 61 Example:: | 
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changeset | 62 | 
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changeset | 63 >>> make_headers(keep_alive=True, user_agent="Batman/1.0") | 
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changeset | 64 {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'} | 
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changeset | 65 >>> make_headers(accept_encoding=True) | 
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changeset | 66 {'accept-encoding': 'gzip,deflate'} | 
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changeset | 67 """ | 
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changeset | 68 headers = {} | 
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changeset | 69 if accept_encoding: | 
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changeset | 70 if isinstance(accept_encoding, str): | 
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changeset | 71 pass | 
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changeset | 72 elif isinstance(accept_encoding, list): | 
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changeset | 73 accept_encoding = ",".join(accept_encoding) | 
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changeset | 74 else: | 
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changeset | 75 accept_encoding = ACCEPT_ENCODING | 
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changeset | 76 headers["accept-encoding"] = accept_encoding | 
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changeset | 77 | 
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changeset | 78 if user_agent: | 
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changeset | 79 headers["user-agent"] = user_agent | 
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changeset | 80 | 
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changeset | 81 if keep_alive: | 
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changeset | 82 headers["connection"] = "keep-alive" | 
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changeset | 83 | 
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changeset | 84 if basic_auth: | 
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changeset | 85 headers["authorization"] = "Basic " + b64encode(b(basic_auth)).decode("utf-8") | 
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changeset | 86 | 
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changeset | 87 if proxy_basic_auth: | 
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changeset | 88 headers["proxy-authorization"] = "Basic " + b64encode( | 
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changeset | 89 b(proxy_basic_auth) | 
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changeset | 90 ).decode("utf-8") | 
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changeset | 91 | 
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changeset | 92 if disable_cache: | 
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changeset | 93 headers["cache-control"] = "no-cache" | 
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changeset | 94 | 
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changeset | 95 return headers | 
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changeset | 96 | 
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changeset | 97 | 
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changeset | 98 def set_file_position(body, pos): | 
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changeset | 99 """ | 
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changeset | 100 If a position is provided, move file to that point. | 
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changeset | 101 Otherwise, we'll attempt to record a position for future use. | 
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changeset | 102 """ | 
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changeset | 103 if pos is not None: | 
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changeset | 104 rewind_body(body, pos) | 
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changeset | 105 elif getattr(body, "tell", None) is not None: | 
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changeset | 106 try: | 
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changeset | 107 pos = body.tell() | 
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changeset | 108 except (IOError, OSError): | 
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changeset | 109 # This differentiates from None, allowing us to catch | 
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changeset | 110 # a failed `tell()` later when trying to rewind the body. | 
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changeset | 111 pos = _FAILEDTELL | 
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changeset | 112 | 
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changeset | 113 return pos | 
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changeset | 114 | 
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changeset | 115 | 
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changeset | 116 def rewind_body(body, body_pos): | 
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changeset | 117 """ | 
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changeset | 118 Attempt to rewind body to a certain position. | 
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changeset | 119 Primarily used for request redirects and retries. | 
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changeset | 120 | 
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changeset | 121 :param body: | 
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changeset | 122 File-like object that supports seek. | 
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changeset | 123 | 
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changeset | 124 :param int pos: | 
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changeset | 125 Position to seek to in file. | 
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changeset | 126 """ | 
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changeset | 127 body_seek = getattr(body, "seek", None) | 
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changeset | 128 if body_seek is not None and isinstance(body_pos, integer_types): | 
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changeset | 129 try: | 
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changeset | 130 body_seek(body_pos) | 
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changeset | 131 except (IOError, OSError): | 
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changeset | 132 raise UnrewindableBodyError( | 
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changeset | 133 "An error occurred when rewinding request body for redirect/retry." | 
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changeset | 134 ) | 
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changeset | 135 elif body_pos is _FAILEDTELL: | 
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changeset | 136 raise UnrewindableBodyError( | 
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changeset | 137 "Unable to record file position for rewinding " | 
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changeset | 138 "request body during a redirect/retry." | 
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changeset | 139 ) | 
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changeset | 140 else: | 
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changeset | 141 raise ValueError( | 
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changeset | 142 "body_pos must be of type integer, instead it was %s." % type(body_pos) | 
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changeset | 143 ) | 
