This file is indexed.

/usr/lib/python2.7/dist-packages/webob/acceptparse.py is in python-webob 1.4-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
"""
Parses a variety of ``Accept-*`` headers.

These headers generally take the form of::

    value1; q=0.5, value2; q=0

Where the ``q`` parameter is optional.  In theory other parameters
exists, but this ignores them.
"""

import re

from webob.headers import _trans_name as header_to_key
from webob.util import (
    header_docstring,
    warn_deprecation,
    )

part_re = re.compile(
    r',\s*([^\s;,\n]+)(?:[^,]*?;\s*q=([0-9.]*))?')




def _warn_first_match():
    # TODO: remove .first_match in version 1.3
    warn_deprecation("Use best_match instead", '1.2', 3)

class Accept(object):
    """
    Represents a generic ``Accept-*`` style header.

    This object should not be modified.  To add items you can use
    ``accept_obj + 'accept_thing'`` to get a new object
    """

    def __init__(self, header_value):
        self.header_value = header_value
        self._parsed = list(self.parse(header_value))
        self._parsed_nonzero = [(m,q) for (m,q) in self._parsed if q]

    @staticmethod
    def parse(value):
        """
        Parse ``Accept-*`` style header.

        Return iterator of ``(value, quality)`` pairs.
        ``quality`` defaults to 1.
        """
        for match in part_re.finditer(','+value):
            name = match.group(1)
            if name == 'q':
                continue
            quality = match.group(2) or ''
            if quality:
                try:
                    quality = max(min(float(quality), 1), 0)
                    yield (name, quality)
                    continue
                except ValueError:
                    pass
            yield (name, 1)

    def __repr__(self):
        return '<%s(%r)>' % (self.__class__.__name__, str(self))

    def __iter__(self):
        for m,q in sorted(
            self._parsed_nonzero,
            key=lambda i: i[1],
            reverse=True
        ):
            yield m

    def __str__(self):
        result = []
        for mask, quality in self._parsed:
            if quality != 1:
                mask = '%s;q=%0.*f' % (
                    mask, min(len(str(quality).split('.')[1]), 3), quality)
            result.append(mask)
        return ', '.join(result)

    def __add__(self, other, reversed=False):
        if isinstance(other, Accept):
            other = other.header_value
        if hasattr(other, 'items'):
            other = sorted(other.items(), key=lambda item: -item[1])
        if isinstance(other, (list, tuple)):
            result = []
            for item in other:
                if isinstance(item, (list, tuple)):
                    name, quality = item
                    result.append('%s; q=%s' % (name, quality))
                else:
                    result.append(item)
            other = ', '.join(result)
        other = str(other)
        my_value = self.header_value
        if reversed:
            other, my_value = my_value, other
        if not other:
            new_value = my_value
        elif not my_value:
            new_value = other
        else:
            new_value = my_value + ', ' + other
        return self.__class__(new_value)

    def __radd__(self, other):
        return self.__add__(other, True)

    def __contains__(self, offer):
        """
        Returns true if the given object is listed in the accepted
        types.
        """
        for mask, quality in self._parsed_nonzero:
            if self._match(mask, offer):
                return True

    def quality(self, offer, modifier=1):
        """
        Return the quality of the given offer.  Returns None if there
        is no match (not 0).
        """
        bestq = 0
        for mask, q in self._parsed:
            if self._match(mask, offer):
                bestq = max(bestq, q * modifier)
        return bestq or None

    def first_match(self, offers):
        """
        DEPRECATED
        Returns the first allowed offered type. Ignores quality.
        Returns the first offered type if nothing else matches; or if you include None
        at the end of the match list then that will be returned.
        """
        _warn_first_match()

    def best_match(self, offers, default_match=None):
        """
        Returns the best match in the sequence of offered types.

        The sequence can be a simple sequence, or you can have
        ``(match, server_quality)`` items in the sequence.  If you
        have these tuples then the client quality is multiplied by the
        server_quality to get a total.  If two matches have equal
        weight, then the one that shows up first in the `offers` list
        will be returned.

        But among matches with the same quality the match to a more specific
        requested type will be chosen. For example a match to text/* trumps */*.

        default_match (default None) is returned if there is no intersection.
        """
        best_quality = -1
        best_offer = default_match
        matched_by = '*/*'
        for offer in offers:
            if isinstance(offer, (tuple, list)):
                offer, server_quality = offer
            else:
                server_quality = 1
            for mask, quality in self._parsed_nonzero:
                possible_quality = server_quality * quality
                if possible_quality < best_quality:
                    continue
                elif possible_quality == best_quality:
                    # 'text/plain' overrides 'message/*' overrides '*/*'
                    # (if all match w/ the same q=)
                    if matched_by.count('*') <= mask.count('*'):
                        continue
                if self._match(mask, offer):
                    best_quality = possible_quality
                    best_offer = offer
                    matched_by = mask
        return best_offer

    def _match(self, mask, offer):
        _check_offer(offer)
        return mask == '*' or offer.lower() == mask.lower()



class NilAccept(object):
    MasterClass = Accept

    def __repr__(self):
        return '<%s: %s>' % (self.__class__.__name__, self.MasterClass)

    def __str__(self):
        return ''

    def __nonzero__(self):
        return False
    __bool__ = __nonzero__ # python 3

    def __iter__(self):
        return iter(())

    def __add__(self, item):
        if isinstance(item, self.MasterClass):
            return item
        else:
            return self.MasterClass('') + item

    def __radd__(self, item):
        if isinstance(item, self.MasterClass):
            return item
        else:
            return item + self.MasterClass('')

    def __contains__(self, item):
        _check_offer(item)
        return True

    def quality(self, offer, default_quality=1):
        return 0

    def first_match(self, offers): # pragma: no cover
        _warn_first_match()

    def best_match(self, offers, default_match=None):
        best_quality = -1
        best_offer = default_match
        for offer in offers:
            _check_offer(offer)
            if isinstance(offer, (list, tuple)):
                offer, quality = offer
            else:
                quality = 1
            if quality > best_quality:
                best_offer = offer
                best_quality = quality
        return best_offer

class NoAccept(NilAccept):
    def __contains__(self, item):
        return False

class AcceptCharset(Accept):
    @staticmethod
    def parse(value):
        latin1_found = False
        for m, q in Accept.parse(value):
            _m = m.lower()
            if _m == '*' or _m == 'iso-8859-1':
                latin1_found = True
            yield _m, q
        if not latin1_found:
            yield ('iso-8859-1', 1)

class AcceptLanguage(Accept):
    def _match(self, mask, item):
        item = item.replace('_', '-').lower()
        mask = mask.lower()
        return (mask == '*'
            or item == mask
            or item.split('-')[0] == mask
            or item == mask.split('-')[0]
        )


class MIMEAccept(Accept):
    """
        Represents the ``Accept`` header, which is a list of mimetypes.

        This class knows about mime wildcards, like ``image/*``
    """
    @staticmethod
    def parse(value):
        for mask, q in Accept.parse(value):
            try:
                mask_major, mask_minor = map(lambda x: x.lower(), mask.split('/'))
            except ValueError:
                continue
            if mask_major == '*' and mask_minor != '*':
                continue
            if mask_major != "*" and "*" in mask_major:
                continue
            if mask_minor != "*" and "*" in mask_minor:
                continue
            yield ("%s/%s" % (mask_major, mask_minor), q)

    def accept_html(self):
        """
        Returns true if any HTML-like type is accepted
        """
        return ('text/html' in self
                or 'application/xhtml+xml' in self
                or 'application/xml' in self
                or 'text/xml' in self)

    accepts_html = property(accept_html) # note the plural

    def _match(self, mask, offer):
        """
            Check if the offer is covered by the mask
        """
        _check_offer(offer)
        if '*' not in mask:
            return offer.lower() == mask.lower()
        elif mask == '*/*':
            return True
        else:
            assert mask.endswith('/*')
            mask_major = mask[:-2].lower()
            offer_major = offer.split('/', 1)[0].lower()
            return offer_major == mask_major


class MIMENilAccept(NilAccept):
    MasterClass = MIMEAccept

def _check_offer(offer):
    if '*' in offer:
        raise ValueError("The application should offer specific types, got %r" % offer)



def accept_property(header, rfc_section,
    AcceptClass=Accept, NilClass=NilAccept
):
    key = header_to_key(header)
    doc = header_docstring(header, rfc_section)
    #doc += "  Converts it as a %s." % convert_name
    def fget(req):
        value = req.environ.get(key)
        if not value:
            return NilClass()
        return AcceptClass(value)
    def fset(req, val):
        if val:
            if isinstance(val, (list, tuple, dict)):
                val = AcceptClass('') + val
            val = str(val)
        req.environ[key] = val or None
    def fdel(req):
        del req.environ[key]
    return property(fget, fset, fdel, doc)