Mercurial > repos > jpayne > bioproject_to_srr_2

comparison urllib3/fields.py @ 7:5eb2d5e3bf22

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planemo upload for repository https://toolrepo.galaxytrakr.org/view/jpayne/bioproject_to_srr_2/556cac4fb538
author jpayne
date Sun, 05 May 2024 23:32:17 -0400
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6:b2745907b1eb 7:5eb2d5e3bf22
1 from __future__ import annotations
2
3 import email.utils
4 import mimetypes
5 import typing
6
7 _TYPE_FIELD_VALUE = typing.Union[str, bytes]
8 _TYPE_FIELD_VALUE_TUPLE = typing.Union[
9 _TYPE_FIELD_VALUE,
10 typing.Tuple[str, _TYPE_FIELD_VALUE],
11 typing.Tuple[str, _TYPE_FIELD_VALUE, str],
12 ]
13
14
15 def guess_content_type(
16 filename: str | None, default: str = "application/octet-stream"
17 ) -> str:
18 """
19 Guess the "Content-Type" of a file.
20
21 :param filename:
22 The filename to guess the "Content-Type" of using :mod:`mimetypes`.
23 :param default:
24 If no "Content-Type" can be guessed, default to `default`.
25 """
26 if filename:
27 return mimetypes.guess_type(filename)[0] or default
28 return default
29
30
31 def format_header_param_rfc2231(name: str, value: _TYPE_FIELD_VALUE) -> str:
32 """
33 Helper function to format and quote a single header parameter using the
34 strategy defined in RFC 2231.
35
36 Particularly useful for header parameters which might contain
37 non-ASCII values, like file names. This follows
38 `RFC 2388 Section 4.4 <https://tools.ietf.org/html/rfc2388#section-4.4>`_.
39
40 :param name:
41 The name of the parameter, a string expected to be ASCII only.
42 :param value:
43 The value of the parameter, provided as ``bytes`` or `str``.
44 :returns:
45 An RFC-2231-formatted unicode string.
46
47 .. deprecated:: 2.0.0
48 Will be removed in urllib3 v2.1.0. This is not valid for
49 ``multipart/form-data`` header parameters.
50 """
51 import warnings
52
53 warnings.warn(
54 "'format_header_param_rfc2231' is deprecated and will be "
55 "removed in urllib3 v2.1.0. This is not valid for "
56 "multipart/form-data header parameters.",
57 DeprecationWarning,
58 stacklevel=2,
59 )
60
61 if isinstance(value, bytes):
62 value = value.decode("utf-8")
63
64 if not any(ch in value for ch in '"\\\r\n'):
65 result = f'{name}="{value}"'
66 try:
67 result.encode("ascii")
68 except (UnicodeEncodeError, UnicodeDecodeError):
69 pass
70 else:
71 return result
72
73 value = email.utils.encode_rfc2231(value, "utf-8")
74 value = f"{name}*={value}"
75
76 return value
77
78
79 def format_multipart_header_param(name: str, value: _TYPE_FIELD_VALUE) -> str:
80 """
81 Format and quote a single multipart header parameter.
82
83 This follows the `WHATWG HTML Standard`_ as of 2021/06/10, matching
84 the behavior of current browser and curl versions. Values are
85 assumed to be UTF-8. The ``\\n``, ``\\r``, and ``"`` characters are
86 percent encoded.
87
88 .. _WHATWG HTML Standard:
89 https://html.spec.whatwg.org/multipage/
90 form-control-infrastructure.html#multipart-form-data
91
92 :param name:
93 The name of the parameter, an ASCII-only ``str``.
94 :param value:
95 The value of the parameter, a ``str`` or UTF-8 encoded
96 ``bytes``.
97 :returns:
98 A string ``name="value"`` with the escaped value.
99
100 .. versionchanged:: 2.0.0
101 Matches the WHATWG HTML Standard as of 2021/06/10. Control
102 characters are no longer percent encoded.
103
104 .. versionchanged:: 2.0.0
105 Renamed from ``format_header_param_html5`` and
106 ``format_header_param``. The old names will be removed in
107 urllib3 v2.1.0.
108 """
109 if isinstance(value, bytes):
110 value = value.decode("utf-8")
111
112 # percent encode \n \r "
113 value = value.translate({10: "%0A", 13: "%0D", 34: "%22"})
114 return f'{name}="{value}"'
115
116
117 def format_header_param_html5(name: str, value: _TYPE_FIELD_VALUE) -> str:
118 """
119 .. deprecated:: 2.0.0
120 Renamed to :func:`format_multipart_header_param`. Will be
121 removed in urllib3 v2.1.0.
122 """
123 import warnings
124
125 warnings.warn(
126 "'format_header_param_html5' has been renamed to "
127 "'format_multipart_header_param'. The old name will be "
128 "removed in urllib3 v2.1.0.",
129 DeprecationWarning,
130 stacklevel=2,
131 )
132 return format_multipart_header_param(name, value)
133
134
135 def format_header_param(name: str, value: _TYPE_FIELD_VALUE) -> str:
136 """
137 .. deprecated:: 2.0.0
138 Renamed to :func:`format_multipart_header_param`. Will be
139 removed in urllib3 v2.1.0.
140 """
141 import warnings
142
143 warnings.warn(
144 "'format_header_param' has been renamed to "
145 "'format_multipart_header_param'. The old name will be "
146 "removed in urllib3 v2.1.0.",
147 DeprecationWarning,
148 stacklevel=2,
149 )
150 return format_multipart_header_param(name, value)
151
152
153 class RequestField:
154 """
155 A data container for request body parameters.
156
157 :param name:
158 The name of this request field. Must be unicode.
159 :param data:
160 The data/value body.
161 :param filename:
162 An optional filename of the request field. Must be unicode.
163 :param headers:
164 An optional dict-like object of headers to initially use for the field.
165
166 .. versionchanged:: 2.0.0
167 The ``header_formatter`` parameter is deprecated and will
168 be removed in urllib3 v2.1.0.
169 """
170
171 def __init__(
172 self,
173 name: str,
174 data: _TYPE_FIELD_VALUE,
175 filename: str | None = None,
176 headers: typing.Mapping[str, str] | None = None,
177 header_formatter: typing.Callable[[str, _TYPE_FIELD_VALUE], str] | None = None,
178 ):
179 self._name = name
180 self._filename = filename
181 self.data = data
182 self.headers: dict[str, str | None] = {}
183 if headers:
184 self.headers = dict(headers)
185
186 if header_formatter is not None:
187 import warnings
188
189 warnings.warn(
190 "The 'header_formatter' parameter is deprecated and "
191 "will be removed in urllib3 v2.1.0.",
192 DeprecationWarning,
193 stacklevel=2,
194 )
195 self.header_formatter = header_formatter
196 else:
197 self.header_formatter = format_multipart_header_param
198
199 @classmethod
200 def from_tuples(
201 cls,
202 fieldname: str,
203 value: _TYPE_FIELD_VALUE_TUPLE,
204 header_formatter: typing.Callable[[str, _TYPE_FIELD_VALUE], str] | None = None,
205 ) -> RequestField:
206 """
207 A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
208
209 Supports constructing :class:`~urllib3.fields.RequestField` from
210 parameter of key/value strings AND key/filetuple. A filetuple is a
211 (filename, data, MIME type) tuple where the MIME type is optional.
212 For example::
213
214 'foo': 'bar',
215 'fakefile': ('foofile.txt', 'contents of foofile'),
216 'realfile': ('barfile.txt', open('realfile').read()),
217 'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
218 'nonamefile': 'contents of nonamefile field',
219
220 Field names and filenames must be unicode.
221 """
222 filename: str | None
223 content_type: str | None
224 data: _TYPE_FIELD_VALUE
225
226 if isinstance(value, tuple):
227 if len(value) == 3:
228 filename, data, content_type = value
229 else:
230 filename, data = value
231 content_type = guess_content_type(filename)
232 else:
233 filename = None
234 content_type = None
235 data = value
236
237 request_param = cls(
238 fieldname, data, filename=filename, header_formatter=header_formatter
239 )
240 request_param.make_multipart(content_type=content_type)
241
242 return request_param
243
244 def _render_part(self, name: str, value: _TYPE_FIELD_VALUE) -> str:
245 """
246 Override this method to change how each multipart header
247 parameter is formatted. By default, this calls
248 :func:`format_multipart_header_param`.
249
250 :param name:
251 The name of the parameter, an ASCII-only ``str``.
252 :param value:
253 The value of the parameter, a ``str`` or UTF-8 encoded
254 ``bytes``.
255
256 :meta public:
257 """
258 return self.header_formatter(name, value)
259
260 def _render_parts(
261 self,
262 header_parts: (
263 dict[str, _TYPE_FIELD_VALUE | None]
264 | typing.Sequence[tuple[str, _TYPE_FIELD_VALUE | None]]
265 ),
266 ) -> str:
267 """
268 Helper function to format and quote a single header.
269
270 Useful for single headers that are composed of multiple items. E.g.,
271 'Content-Disposition' fields.
272
273 :param header_parts:
274 A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
275 as `k1="v1"; k2="v2"; ...`.
276 """
277 iterable: typing.Iterable[tuple[str, _TYPE_FIELD_VALUE | None]]
278
279 parts = []
280 if isinstance(header_parts, dict):
281 iterable = header_parts.items()
282 else:
283 iterable = header_parts
284
285 for name, value in iterable:
286 if value is not None:
287 parts.append(self._render_part(name, value))
288
289 return "; ".join(parts)
290
291 def render_headers(self) -> str:
292 """
293 Renders the headers for this request field.
294 """
295 lines = []
296
297 sort_keys = ["Content-Disposition", "Content-Type", "Content-Location"]
298 for sort_key in sort_keys:
299 if self.headers.get(sort_key, False):
300 lines.append(f"{sort_key}: {self.headers[sort_key]}")
301
302 for header_name, header_value in self.headers.items():
303 if header_name not in sort_keys:
304 if header_value:
305 lines.append(f"{header_name}: {header_value}")
306
307 lines.append("\r\n")
308 return "\r\n".join(lines)
309
310 def make_multipart(
311 self,
312 content_disposition: str | None = None,
313 content_type: str | None = None,
314 content_location: str | None = None,
315 ) -> None:
316 """
317 Makes this request field into a multipart request field.
318
319 This method overrides "Content-Disposition", "Content-Type" and
320 "Content-Location" headers to the request parameter.
321
322 :param content_disposition:
323 The 'Content-Disposition' of the request body. Defaults to 'form-data'
324 :param content_type:
325 The 'Content-Type' of the request body.
326 :param content_location:
327 The 'Content-Location' of the request body.
328
329 """
330 content_disposition = (content_disposition or "form-data") + "; ".join(
331 [
332 "",
333 self._render_parts(
334 (("name", self._name), ("filename", self._filename))
335 ),
336 ]
337 )
338
339 self.headers["Content-Disposition"] = content_disposition
340 self.headers["Content-Type"] = content_type
341 self.headers["Content-Location"] = content_location