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
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
|
import os
import re
from Cookie import SimpleCookie, CookieError
from pprint import pformat
from urllib import urlencode
from urlparse import urljoin
try:
# The mod_python version is more efficient, so try importing it first.
from mod_python.util import parse_qsl
except ImportError:
from cgi import parse_qsl
from django.utils.datastructures import MultiValueDict, ImmutableList
from django.utils.encoding import smart_str, iri_to_uri, force_unicode
from django.http.multipartparser import MultiPartParser
from django.conf import settings
from django.core.files import uploadhandler
from utils import *
RESERVED_CHARS="!*'();:@&=+$,/?%#[]"
absolute_http_url_re = re.compile(r"^https?://", re.I)
class Http404(Exception):
pass
class HttpRequest(object):
"""A basic HTTP request."""
# The encoding used in GET/POST dicts. None means use default setting.
_encoding = None
_upload_handlers = []
def __init__(self):
self.GET, self.POST, self.COOKIES, self.META, self.FILES = {}, {}, {}, {}, {}
self.path = ''
self.path_info = ''
self.method = None
def __repr__(self):
return '<HttpRequest\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' % \
(pformat(self.GET), pformat(self.POST), pformat(self.COOKIES),
pformat(self.META))
def get_host(self):
"""Returns the HTTP host using the environment or request headers."""
# We try three options, in order of decreasing preference.
if 'HTTP_X_FORWARDED_HOST' in self.META:
host = self.META['HTTP_X_FORWARDED_HOST']
elif 'HTTP_HOST' in self.META:
host = self.META['HTTP_HOST']
else:
# Reconstruct the host using the algorithm from PEP 333.
host = self.META['SERVER_NAME']
server_port = self.META['SERVER_PORT']
if server_port != (self.is_secure() and 443 or 80):
host = '%s:%s' % (host, server_port)
return host
def get_full_path(self):
return ''
def build_absolute_uri(self, location=None):
"""
Builds an absolute URI from the location and the variables available in
this request. If no location is specified, the absolute URI is built on
``request.get_full_path()``.
"""
if not location:
location = self.get_full_path()
if not absolute_http_url_re.match(location):
current_uri = '%s://%s%s' % (self.is_secure() and 'https' or 'http',
self.get_host(), self.path)
location = urljoin(current_uri, location)
return location
def is_secure(self):
return os.environ.get("HTTPS") == "on"
def is_ajax(self):
return self.META.get('HTTP_X_REQUESTED_WITH') == 'XMLHttpRequest'
def _set_encoding(self, val):
"""
Sets the encoding used for GET/POST accesses. If the GET or POST
dictionary has already been created, it is removed and recreated on the
next access (so that it is decoded correctly).
"""
self._encoding = val
if hasattr(self, '_get'):
del self._get
if hasattr(self, '_post'):
del self._post
def _get_encoding(self):
return self._encoding
encoding = property(_get_encoding, _set_encoding)
def _initialize_handlers(self):
self._upload_handlers = [uploadhandler.load_handler(handler, self)
for handler in settings.FILE_UPLOAD_HANDLERS]
def _set_upload_handlers(self, upload_handlers):
if hasattr(self, '_files'):
raise AttributeError("You cannot set the upload handlers after the upload has been processed.")
self._upload_handlers = upload_handlers
def _get_upload_handlers(self):
if not self._upload_handlers:
# If thre are no upload handlers defined, initialize them from settings.
self._initialize_handlers()
return self._upload_handlers
upload_handlers = property(_get_upload_handlers, _set_upload_handlers)
def parse_file_upload(self, META, post_data):
"""Returns a tuple of (POST QueryDict, FILES MultiValueDict)."""
self.upload_handlers = ImmutableList(
self.upload_handlers,
warning = "You cannot alter upload handlers after the upload has been processed."
)
parser = MultiPartParser(META, post_data, self.upload_handlers, self.encoding)
return parser.parse()
class QueryDict(MultiValueDict):
"""
A specialized MultiValueDict that takes a query string when initialized.
This is immutable unless you create a copy of it.
Values retrieved from this class are converted from the given encoding
(DEFAULT_CHARSET by default) to unicode.
"""
# These are both reset in __init__, but is specified here at the class
# level so that unpickling will have valid values
_mutable = True
_encoding = None
def __init__(self, query_string, mutable=False, encoding=None):
MultiValueDict.__init__(self)
if not encoding:
# *Important*: do not import settings any earlier because of note
# in core.handlers.modpython.
from django.conf import settings
encoding = settings.DEFAULT_CHARSET
self.encoding = encoding
for key, value in parse_qsl((query_string or ''), True): # keep_blank_values=True
self.appendlist(force_unicode(key, encoding, errors='replace'),
force_unicode(value, encoding, errors='replace'))
self._mutable = mutable
def _get_encoding(self):
if self._encoding is None:
# *Important*: do not import settings at the module level because
# of the note in core.handlers.modpython.
from django.conf import settings
self._encoding = settings.DEFAULT_CHARSET
return self._encoding
def _set_encoding(self, value):
self._encoding = value
encoding = property(_get_encoding, _set_encoding)
def _assert_mutable(self):
if not self._mutable:
raise AttributeError("This QueryDict instance is immutable")
def __setitem__(self, key, value):
self._assert_mutable()
key = str_to_unicode(key, self.encoding)
value = str_to_unicode(value, self.encoding)
MultiValueDict.__setitem__(self, key, value)
def __delitem__(self, key):
self._assert_mutable()
super(QueryDict, self).__delitem__(key)
def __copy__(self):
result = self.__class__('', mutable=True)
for key, value in dict.items(self):
dict.__setitem__(result, key, value)
return result
def __deepcopy__(self, memo):
import copy
result = self.__class__('', mutable=True)
memo[id(self)] = result
for key, value in dict.items(self):
dict.__setitem__(result, copy.deepcopy(key, memo), copy.deepcopy(value, memo))
return result
def setlist(self, key, list_):
self._assert_mutable()
key = str_to_unicode(key, self.encoding)
list_ = [str_to_unicode(elt, self.encoding) for elt in list_]
MultiValueDict.setlist(self, key, list_)
def setlistdefault(self, key, default_list=()):
self._assert_mutable()
if key not in self:
self.setlist(key, default_list)
return MultiValueDict.getlist(self, key)
def appendlist(self, key, value):
self._assert_mutable()
key = str_to_unicode(key, self.encoding)
value = str_to_unicode(value, self.encoding)
MultiValueDict.appendlist(self, key, value)
def update(self, other_dict):
self._assert_mutable()
f = lambda s: str_to_unicode(s, self.encoding)
d = dict([(f(k), f(v)) for k, v in other_dict.items()])
MultiValueDict.update(self, d)
def pop(self, key, *args):
self._assert_mutable()
return MultiValueDict.pop(self, key, *args)
def popitem(self):
self._assert_mutable()
return MultiValueDict.popitem(self)
def clear(self):
self._assert_mutable()
MultiValueDict.clear(self)
def setdefault(self, key, default=None):
self._assert_mutable()
key = str_to_unicode(key, self.encoding)
default = str_to_unicode(default, self.encoding)
return MultiValueDict.setdefault(self, key, default)
def copy(self):
"""Returns a mutable copy of this object."""
return self.__deepcopy__({})
def urlencode(self):
output = []
for k, list_ in self.lists():
k = smart_str(k, self.encoding)
output.extend([urlencode({k: smart_str(v, self.encoding)}) for v in list_])
return '&'.join(output)
def parse_cookie(cookie):
if cookie == '':
return {}
try:
c = SimpleCookie()
c.load(cookie)
except CookieError:
# Invalid cookie
return {}
cookiedict = {}
for key in c.keys():
cookiedict[key] = c.get(key).value
return cookiedict
class HttpResponse(object):
"""A basic HTTP response, with content and dictionary-accessed headers."""
status_code = 200
def __init__(self, content='', mimetype=None, status=None,
content_type=None):
from django.conf import settings
self._charset = settings.DEFAULT_CHARSET
if mimetype:
content_type = mimetype # For backwards compatibility
if not content_type:
content_type = "%s; charset=%s" % (settings.DEFAULT_CONTENT_TYPE,
settings.DEFAULT_CHARSET)
if not isinstance(content, basestring) and hasattr(content, '__iter__'):
self._container = content
self._is_string = False
else:
self._container = [content]
self._is_string = True
self.cookies = SimpleCookie()
if status:
self.status_code = status
# _headers is a mapping of the lower-case name to the original case of
# the header (required for working with legacy systems) and the header
# value.
self._headers = {'content-type': ('Content-Type', content_type)}
def __str__(self):
"""Full HTTP message, including headers."""
return '\n'.join(['%s: %s' % (key, value)
for key, value in self._headers.values()]) \
+ '\n\n' + self.content
def _convert_to_ascii(self, *values):
"""Converts all values to ascii strings."""
for value in values:
if isinstance(value, unicode):
try:
yield value.encode('us-ascii')
except UnicodeError, e:
e.reason += ', HTTP response headers must be in US-ASCII format'
raise
else:
yield str(value)
def __setitem__(self, header, value):
header, value = self._convert_to_ascii(header, value)
self._headers[header.lower()] = (header, value)
def __delitem__(self, header):
try:
del self._headers[header.lower()]
except KeyError:
pass
def __getitem__(self, header):
return self._headers[header.lower()][1]
def has_header(self, header):
"""Case-insensitive check for a header."""
return self._headers.has_key(header.lower())
__contains__ = has_header
def items(self):
return self._headers.values()
def get(self, header, alternate):
return self._headers.get(header.lower(), (None, alternate))[1]
def set_cookie(self, key, value='', max_age=None, expires=None, path='/',
domain=None, secure=False):
self.cookies[key] = value
if max_age is not None:
self.cookies[key]['max-age'] = max_age
if expires is not None:
self.cookies[key]['expires'] = expires
if path is not None:
self.cookies[key]['path'] = path
if domain is not None:
self.cookies[key]['domain'] = domain
if secure:
self.cookies[key]['secure'] = True
def delete_cookie(self, key, path='/', domain=None):
self.set_cookie(key, max_age=0, path=path, domain=domain,
expires='Thu, 01-Jan-1970 00:00:00 GMT')
def _get_content(self):
if self.has_header('Content-Encoding'):
return ''.join(self._container)
return smart_str(''.join(self._container), self._charset)
def _set_content(self, value):
self._container = [value]
self._is_string = True
content = property(_get_content, _set_content)
def __iter__(self):
self._iterator = iter(self._container)
return self
def next(self):
chunk = self._iterator.next()
if isinstance(chunk, unicode):
chunk = chunk.encode(self._charset)
return str(chunk)
def close(self):
if hasattr(self._container, 'close'):
self._container.close()
# The remaining methods partially implement the file-like object interface.
# See http://docs.python.org/lib/bltin-file-objects.html
def write(self, content):
if not self._is_string:
raise Exception("This %s instance is not writable" % self.__class__)
self._container.append(content)
def flush(self):
pass
def tell(self):
if not self._is_string:
raise Exception("This %s instance cannot tell its position" % self.__class__)
return sum([len(chunk) for chunk in self._container])
class HttpResponseRedirect(HttpResponse):
status_code = 302
def __init__(self, redirect_to):
HttpResponse.__init__(self)
self['Location'] = iri_to_uri(redirect_to)
class HttpResponsePermanentRedirect(HttpResponse):
status_code = 301
def __init__(self, redirect_to):
HttpResponse.__init__(self)
self['Location'] = iri_to_uri(redirect_to)
class HttpResponseNotModified(HttpResponse):
status_code = 304
class HttpResponseBadRequest(HttpResponse):
status_code = 400
class HttpResponseNotFound(HttpResponse):
status_code = 404
class HttpResponseForbidden(HttpResponse):
status_code = 403
class HttpResponseNotAllowed(HttpResponse):
status_code = 405
def __init__(self, permitted_methods):
HttpResponse.__init__(self)
self['Allow'] = ', '.join(permitted_methods)
class HttpResponseGone(HttpResponse):
status_code = 410
def __init__(self, *args, **kwargs):
HttpResponse.__init__(self, *args, **kwargs)
class HttpResponseServerError(HttpResponse):
status_code = 500
def __init__(self, *args, **kwargs):
HttpResponse.__init__(self, *args, **kwargs)
# A backwards compatible alias for HttpRequest.get_host.
def get_host(request):
return request.get_host()
# It's neither necessary nor appropriate to use
# django.utils.encoding.smart_unicode for parsing URLs and form inputs. Thus,
# this slightly more restricted function.
def str_to_unicode(s, encoding):
"""
Converts basestring objects to unicode, using the given encoding. Illegally
encoded input characters are replaced with Unicode "unknown" codepoint
(\ufffd).
Returns any non-basestring objects without change.
"""
if isinstance(s, str):
return unicode(s, encoding, 'replace')
else:
return s
|