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fields.py

from __future__ import absolute_import

import email.utils
import mimetypes
import re

from .packages import six

def guess_content_type(filename, default="application/octet-stream"):
    """
    Guess the "Content-Type" of a file.

:param filename:
        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
    :param default:
        If no "Content-Type" can be guessed, default to `default`.
    """
    if filename:
        return mimetypes.guess_type(filename)[0] or default
    return default

def format_header_param_rfc2231(name, value):
    """
    Helper function to format and quote a single header parameter using the
    strategy defined in RFC 2231.

Particularly useful for header parameters which might contain
    non-ASCII values, like file names. This follows
    `RFC 2388 Section 4.4 <https://tools.ietf.org/html/rfc2388#section-4.4>`_.

:param name:
        The name of the parameter, a string expected to be ASCII only.
    :param value:
        The value of the parameter, provided as ``bytes`` or `str``.
    :ret:
        An RFC-2231-formatted unicode string.
    """
    if isinstance(value, six.binary_type):
        value = value.decode("utf-8")

if not any(ch in value for ch in '"\\\r\n'):
        result = u'%s="%s"' % (name, value)
        try:
            result.encode("ascii")
        except (UnicodeEncodeError, UnicodeDecodeError):
            pass
        else:
            return result

if six.PY2:  # Python 2:
        value = value.encode("utf-8")

# encode_rfc2231 accepts an encoded string and returns an ascii-encoded
    # string in Python 2 but accepts and returns unicode strings in Python 3
    value = email.utils.encode_rfc2231(value, "utf-8")
    value = "%s*=%s" % (name, value)

if six.PY2:  # Python 2:
        value = value.decode("utf-8")

return value

_HTML5_REPLACEMENTS = {
    u"\u0022": u"%22",
    # Replace "\" with "\\".
    u"\u005C": u"\u005C\u005C",
}

# All control characters from 0x00 to 0x1F *except* 0x1B.
_HTML5_REPLACEMENTS.update(
    {
        six.unichr(cc): u"%{:02X}".format(cc)
        for cc in range(0x00, 0x1F + 1)
        if cc not in (0x1B,)
    }
)

def _replace_multiple(value, needles_and_replacements):
    def replacer(match):
        return needles_and_replacements[match.group(0)]

pattern = re.compile(
        r"|".join([re.escape(needle) for needle in needles_and_replacements.keys()])
    )

result = pattern.sub(replacer, value)

return result

def format_header_param_html5(name, value):
    """
    Helper function to format and quote a single header parameter using the
    HTML5 strategy.

Particularly useful for header parameters which might contain
    non-ASCII values, like file names. This follows the `HTML5 Working Draft
    Section 4.10.22.7`_ and matches the behavior of curl and modern browsers.

.. _HTML5 Working Draft Section 4.10.22.7:
        https://w3c.github.io/html/sec-forms.html#multipart-form-data

:param name:
        The name of the parameter, a string expected to be ASCII only.
    :param value:
        The value of the parameter, provided as ``bytes`` or `str``.
    :ret:
        A unicode string, stripped of troublesome characters.
    """
    if isinstance(value, six.binary_type):
        value = value.decode("utf-8")

value = _replace_multiple(value, _HTML5_REPLACEMENTS)

return u'%s="%s"' % (name, value)

# For backwards-compatibility.
format_header_param = format_header_param_html5

class RequestField(object):
    """
    A data container for request body parameters.

:param name:
        The name of this request field. Must be unicode.
    :param data:
        The data/value body.
    :param filename:
        An optional filename of the request field. Must be unicode.
    :param headers:
        An optional dict-like object of headers to initially use for the field.
    :param header_formatter:
        An optional callable that is used to encode and format the headers. By
        default, this is :func:`format_header_param_html5`.
    """

def __init__(
        self,
        name,
        data,
        filename=None,
        headers=None,
        header_formatter=format_header_param_html5,
    ):
        self._name = name
        self._filename = filename
        self.data = data
        self.headers = {}
        if headers:
            self.headers = dict(headers)
        self.header_formatter = header_formatter

@classmethod
    def from_tuples(cls, fieldname, value, header_formatter=format_header_param_html5):
        """
        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.

Supports constructing :class:`~urllib3.fields.RequestField` from
        parameter of key/value strings AND key/filetuple. A filetuple is a
        (filename, data, MIME type) tuple where the MIME type is optional.
        For example::

'foo': 'bar',
            'fakefile': ('foofile.txt', 'contents of foofile'),
            'realfile': ('barfile.txt', open('realfile').read()),
            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
            'nonamefile': 'contents of nonamefile field',

Field names and filenames must be unicode.
        """
        if isinstance(value, tuple):
            if len(value) == 3:
                filename, data, content_type = value
            else:
                filename, data = value
                content_type = guess_content_type(filename)
        else:
            filename = None
            content_type = None
            data = value

request_param = cls(
            fieldname, data, filename=filename, header_formatter=header_formatter
        )
        request_param.make_multipart(content_type=content_type)

return request_param

def _render_part(self, name, value):
        """
        Overridable helper function to format a single header parameter. By
        default, this calls ``self.header_formatter``.

:param name:
            The name of the parameter, a string expected to be ASCII only.
        :param value:
            The value of the parameter, provided as a unicode string.
        """

return self.header_formatter(name, value)

def _render_parts(self, header_parts):
        """
        Helper function to format and quote a single header.

Useful for single headers that are composed of multiple items. E.g.,
        'Content-Disposition' fields.

:param header_parts:
            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
            as `k1="v1"; k2="v2"; ...`.
        """
        parts = []
        iterable = header_parts
        if isinstance(header_parts, dict):
            iterable = header_parts.items()

for name, value in iterable:
            if value is not None:
                parts.append(self._render_part(name, value))

return u"; ".join(parts)

def render_headers(self):
        """
        Renders the headers for this request field.
        """
        lines = []

sort_keys = ["Content-Disposition", "Content-Type", "Content-Location"]
        for sort_key in sort_keys:
            if self.headers.get(sort_key, False):
                lines.append(u"%s: %s" % (sort_key, self.headers[sort_key]))

for header_name, header_value in self.headers.items():
            if header_name not in sort_keys:
                if header_value:
                    lines.append(u"%s: %s" % (header_name, header_value))

lines.append(u"\r\n")
        return u"\r\n".join(lines)

def make_multipart(
        self, content_disposition=None, content_type=None, content_location=None
    ):
        """
        Makes this request field into a multipart request field.

This method overrides "Content-Disposition", "Content-Type" and
        "Content-Location" headers to the request parameter.

:param content_type:
            The 'Content-Type' of the request body.
        :param content_location:
            The 'Content-Location' of the request body.

"""
        self.headers["Content-Disposition"] = content_disposition or u"form-data"
        self.headers["Content-Disposition"] += u"; ".join(
            [
                u"",
                self._render_parts(
                    ((u"name", self._name), (u"filename", self._filename))
                ),
            ]
        )
        self.headers["Content-Type"] = content_type
        self.headers["Content-Location"] = content_location

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-08-05 07:02:04
..	dir	-	root/root	0755	2025-08-05 07:02:04
__pycache__	dir	-	root/root	0755	2025-08-05 07:02:04
contrib	dir	-	root/root	0755	2025-08-05 07:02:04
packages	dir	-	root/root	0755	2025-08-05 07:02:04
util	dir	-	root/root	0755	2025-08-05 07:02:04
__init__.py	text/plain	3.25 KB	root/root	0644	2025-07-04 01:31:02
_collections.py	text/x-python	11.11 KB	root/root	0644	2025-07-04 01:31:02
_version.py	text/plain	64 B	root/root	0644	2025-07-04 01:31:02
connection.py	text/x-python	19.84 KB	root/root	0644	2025-07-04 01:31:02
connectionpool.py	text/x-python	39.46 KB	root/root	0644	2025-07-04 01:31:02
exceptions.py	text/x-python	8.02 KB	root/root	0644	2025-07-04 01:31:02
fields.py	text/x-python	8.38 KB	root/root	0644	2025-07-04 01:31:02
filepost.py	text/x-python	2.38 KB	root/root	0644	2025-07-04 01:31:02
poolmanager.py	text/x-python	19.52 KB	root/root	0644	2025-07-04 01:31:02
request.py	text/x-python	6.53 KB	root/root	0644	2025-07-04 01:31:02
response.py	text/x-python	29.92 KB	root/root	0644	2025-07-04 01:31:02