/usr/lib/python3/dist-packages/aiohttp/web_response.py is in python3-aiohttp 3.0.1-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 | import collections
import datetime
import enum
import json
import math
import time
import warnings
import zlib
from email.utils import parsedate
from http.cookies import SimpleCookie
from multidict import CIMultiDict, CIMultiDictProxy
from . import hdrs, payload
from .helpers import HeadersMixin, rfc822_formatted_time, sentinel
from .http import RESPONSES, SERVER_SOFTWARE, HttpVersion10, HttpVersion11
__all__ = ('ContentCoding', 'StreamResponse', 'Response', 'json_response')
class ContentCoding(enum.Enum):
# The content codings that we have support for.
#
# Additional registered codings are listed at:
# https://www.iana.org/assignments/http-parameters/http-parameters.xhtml#content-coding
deflate = 'deflate'
gzip = 'gzip'
identity = 'identity'
############################################################
# HTTP Response classes
############################################################
class StreamResponse(collections.MutableMapping, HeadersMixin):
_length_check = True
def __init__(self, *, status=200, reason=None, headers=None):
self._body = None
self._keep_alive = None
self._chunked = False
self._compression = False
self._compression_force = False
self._cookies = SimpleCookie()
self._req = None
self._payload_writer = None
self._eof_sent = False
self._body_length = 0
self._state = {}
if headers is not None:
self._headers = CIMultiDict(headers)
else:
self._headers = CIMultiDict()
self.set_status(status, reason)
@property
def prepared(self):
return self._payload_writer is not None
@property
def task(self):
return getattr(self._req, 'task', None)
@property
def status(self):
return self._status
@property
def chunked(self):
return self._chunked
@property
def compression(self):
return self._compression
@property
def reason(self):
return self._reason
def set_status(self, status, reason=None, _RESPONSES=RESPONSES):
assert not self.prepared, \
'Cannot change the response status code after ' \
'the headers have been sent'
self._status = int(status)
if reason is None:
try:
reason = _RESPONSES[self._status][0]
except Exception:
reason = ''
self._reason = reason
@property
def keep_alive(self):
return self._keep_alive
def force_close(self):
self._keep_alive = False
@property
def body_length(self):
return self._body_length
@property
def output_length(self):
warnings.warn('output_length is deprecated', DeprecationWarning)
return self._payload_writer.buffer_size
def enable_chunked_encoding(self, chunk_size=None):
"""Enables automatic chunked transfer encoding."""
self._chunked = True
if hdrs.CONTENT_LENGTH in self._headers:
raise RuntimeError("You can't enable chunked encoding when "
"a content length is set")
if chunk_size is not None:
warnings.warn('Chunk size is deprecated #1615', DeprecationWarning)
def enable_compression(self, force=None):
"""Enables response compression encoding."""
# Backwards compatibility for when force was a bool <0.17.
if type(force) == bool:
force = ContentCoding.deflate if force else ContentCoding.identity
elif force is not None:
assert isinstance(force, ContentCoding), ("force should one of "
"None, bool or "
"ContentEncoding")
self._compression = True
self._compression_force = force
@property
def headers(self):
return self._headers
@property
def cookies(self):
return self._cookies
def set_cookie(self, name, value, *, expires=None,
domain=None, max_age=None, path='/',
secure=None, httponly=None, version=None):
"""Set or update response cookie.
Sets new cookie or updates existent with new value.
Also updates only those params which are not None.
"""
old = self._cookies.get(name)
if old is not None and old.coded_value == '':
# deleted cookie
self._cookies.pop(name, None)
self._cookies[name] = value
c = self._cookies[name]
if expires is not None:
c['expires'] = expires
elif c.get('expires') == 'Thu, 01 Jan 1970 00:00:00 GMT':
del c['expires']
if domain is not None:
c['domain'] = domain
if max_age is not None:
c['max-age'] = max_age
elif 'max-age' in c:
del c['max-age']
c['path'] = path
if secure is not None:
c['secure'] = secure
if httponly is not None:
c['httponly'] = httponly
if version is not None:
c['version'] = version
def del_cookie(self, name, *, domain=None, path='/'):
"""Delete cookie.
Creates new empty expired cookie.
"""
# TODO: do we need domain/path here?
self._cookies.pop(name, None)
self.set_cookie(name, '', max_age=0,
expires="Thu, 01 Jan 1970 00:00:00 GMT",
domain=domain, path=path)
@property
def content_length(self):
# Just a placeholder for adding setter
return super().content_length
@content_length.setter
def content_length(self, value):
if value is not None:
value = int(value)
if self._chunked:
raise RuntimeError("You can't set content length when "
"chunked encoding is enable")
self._headers[hdrs.CONTENT_LENGTH] = str(value)
else:
self._headers.pop(hdrs.CONTENT_LENGTH, None)
@property
def content_type(self):
# Just a placeholder for adding setter
return super().content_type
@content_type.setter
def content_type(self, value):
self.content_type # read header values if needed
self._content_type = str(value)
self._generate_content_type_header()
@property
def charset(self):
# Just a placeholder for adding setter
return super().charset
@charset.setter
def charset(self, value):
ctype = self.content_type # read header values if needed
if ctype == 'application/octet-stream':
raise RuntimeError("Setting charset for application/octet-stream "
"doesn't make sense, setup content_type first")
if value is None:
self._content_dict.pop('charset', None)
else:
self._content_dict['charset'] = str(value).lower()
self._generate_content_type_header()
@property
def last_modified(self, _LAST_MODIFIED=hdrs.LAST_MODIFIED):
"""The value of Last-Modified HTTP header, or None.
This header is represented as a `datetime` object.
"""
httpdate = self.headers.get(_LAST_MODIFIED)
if httpdate is not None:
timetuple = parsedate(httpdate)
if timetuple is not None:
return datetime.datetime(*timetuple[:6],
tzinfo=datetime.timezone.utc)
return None
@last_modified.setter
def last_modified(self, value):
if value is None:
self.headers.pop(hdrs.LAST_MODIFIED, None)
elif isinstance(value, (int, float)):
self.headers[hdrs.LAST_MODIFIED] = time.strftime(
"%a, %d %b %Y %H:%M:%S GMT", time.gmtime(math.ceil(value)))
elif isinstance(value, datetime.datetime):
self.headers[hdrs.LAST_MODIFIED] = time.strftime(
"%a, %d %b %Y %H:%M:%S GMT", value.utctimetuple())
elif isinstance(value, str):
self.headers[hdrs.LAST_MODIFIED] = value
def _generate_content_type_header(self, CONTENT_TYPE=hdrs.CONTENT_TYPE):
params = '; '.join("%s=%s" % i for i in self._content_dict.items())
if params:
ctype = self._content_type + '; ' + params
else:
ctype = self._content_type
self.headers[CONTENT_TYPE] = ctype
def _do_start_compression(self, coding):
if coding != ContentCoding.identity:
self.headers[hdrs.CONTENT_ENCODING] = coding.value
self._payload_writer.enable_compression(coding.value)
# Compressed payload may have different content length,
# remove the header
self._headers.popall(hdrs.CONTENT_LENGTH, None)
def _start_compression(self, request):
if self._compression_force:
self._do_start_compression(self._compression_force)
else:
accept_encoding = request.headers.get(
hdrs.ACCEPT_ENCODING, '').lower()
for coding in ContentCoding:
if coding.value in accept_encoding:
self._do_start_compression(coding)
return
async def prepare(self, request):
if self._eof_sent:
return
if self._payload_writer is not None:
return self._payload_writer
await request._prepare_hook(self)
return self._start(request)
def _start(self, request,
HttpVersion10=HttpVersion10,
HttpVersion11=HttpVersion11,
CONNECTION=hdrs.CONNECTION,
DATE=hdrs.DATE,
SERVER=hdrs.SERVER,
CONTENT_TYPE=hdrs.CONTENT_TYPE,
CONTENT_LENGTH=hdrs.CONTENT_LENGTH,
SET_COOKIE=hdrs.SET_COOKIE,
SERVER_SOFTWARE=SERVER_SOFTWARE,
TRANSFER_ENCODING=hdrs.TRANSFER_ENCODING):
self._req = request
keep_alive = self._keep_alive
if keep_alive is None:
keep_alive = request.keep_alive
self._keep_alive = keep_alive
version = request.version
writer = self._payload_writer = request._payload_writer
headers = self._headers
for cookie in self._cookies.values():
value = cookie.output(header='')[1:]
headers.add(SET_COOKIE, value)
if self._compression:
self._start_compression(request)
if self._chunked:
if version != HttpVersion11:
raise RuntimeError(
"Using chunked encoding is forbidden "
"for HTTP/{0.major}.{0.minor}".format(request.version))
writer.enable_chunking()
headers[TRANSFER_ENCODING] = 'chunked'
if CONTENT_LENGTH in headers:
del headers[CONTENT_LENGTH]
elif self._length_check:
writer.length = self.content_length
if writer.length is None:
if version >= HttpVersion11:
writer.enable_chunking()
headers[TRANSFER_ENCODING] = 'chunked'
if CONTENT_LENGTH in headers:
del headers[CONTENT_LENGTH]
else:
keep_alive = False
headers.setdefault(CONTENT_TYPE, 'application/octet-stream')
headers.setdefault(DATE, rfc822_formatted_time())
headers.setdefault(SERVER, SERVER_SOFTWARE)
# connection header
if CONNECTION not in headers:
if keep_alive:
if version == HttpVersion10:
headers[CONNECTION] = 'keep-alive'
else:
if version == HttpVersion11:
headers[CONNECTION] = 'close'
# status line
status_line = 'HTTP/{}.{} {} {}\r\n'.format(
version[0], version[1], self._status, self._reason)
writer.write_headers(status_line, headers)
return writer
async def write(self, data):
assert isinstance(data, (bytes, bytearray, memoryview)), \
"data argument must be byte-ish (%r)" % type(data)
if self._eof_sent:
raise RuntimeError("Cannot call write() after write_eof()")
if self._payload_writer is None:
raise RuntimeError("Cannot call write() before prepare()")
await self._payload_writer.write(data)
async def drain(self):
assert not self._eof_sent, "EOF has already been sent"
assert self._payload_writer is not None, \
"Response has not been started"
warnings.warn("drain method is deprecated, use await resp.write()",
DeprecationWarning,
stacklevel=2)
await self._payload_writer.drain()
async def write_eof(self, data=b''):
assert isinstance(data, (bytes, bytearray, memoryview)), \
"data argument must be byte-ish (%r)" % type(data)
if self._eof_sent:
return
assert self._payload_writer is not None, \
"Response has not been started"
await self._payload_writer.write_eof(data)
self._eof_sent = True
self._req = None
self._body_length = self._payload_writer.output_size
self._payload_writer = None
def __repr__(self):
if self._eof_sent:
info = "eof"
elif self.prepared:
info = "{} {} ".format(self._req.method, self._req.path)
else:
info = "not prepared"
return "<{} {} {}>".format(self.__class__.__name__,
self.reason, info)
def __getitem__(self, key):
return self._state[key]
def __setitem__(self, key, value):
self._state[key] = value
def __delitem__(self, key):
del self._state[key]
def __len__(self):
return len(self._state)
def __iter__(self):
return iter(self._state)
def __hash__(self):
return hash(id(self))
class Response(StreamResponse):
def __init__(self, *, body=None, status=200,
reason=None, text=None, headers=None, content_type=None,
charset=None):
if body is not None and text is not None:
raise ValueError("body and text are not allowed together")
if headers is None:
headers = CIMultiDict()
elif not isinstance(headers, (CIMultiDict, CIMultiDictProxy)):
headers = CIMultiDict(headers)
if content_type is not None and "charset" in content_type:
raise ValueError("charset must not be in content_type "
"argument")
if text is not None:
if hdrs.CONTENT_TYPE in headers:
if content_type or charset:
raise ValueError("passing both Content-Type header and "
"content_type or charset params "
"is forbidden")
else:
# fast path for filling headers
if not isinstance(text, str):
raise TypeError("text argument must be str (%r)" %
type(text))
if content_type is None:
content_type = 'text/plain'
if charset is None:
charset = 'utf-8'
headers[hdrs.CONTENT_TYPE] = (
content_type + '; charset=' + charset)
body = text.encode(charset)
text = None
else:
if hdrs.CONTENT_TYPE in headers:
if content_type is not None or charset is not None:
raise ValueError("passing both Content-Type header and "
"content_type or charset params "
"is forbidden")
else:
if content_type is not None:
if charset is not None:
content_type += '; charset=' + charset
headers[hdrs.CONTENT_TYPE] = content_type
super().__init__(status=status, reason=reason, headers=headers)
if text is not None:
self.text = text
else:
self.body = body
self._compressed_body = None
@property
def body(self):
return self._body
@body.setter
def body(self, body,
CONTENT_TYPE=hdrs.CONTENT_TYPE,
CONTENT_LENGTH=hdrs.CONTENT_LENGTH):
if body is None:
self._body = None
self._body_payload = False
elif isinstance(body, (bytes, bytearray)):
self._body = body
self._body_payload = False
else:
try:
self._body = body = payload.PAYLOAD_REGISTRY.get(body)
except payload.LookupError:
raise ValueError('Unsupported body type %r' % type(body))
self._body_payload = True
headers = self._headers
# set content-length header if needed
if not self._chunked and CONTENT_LENGTH not in headers:
size = body.size
if size is not None:
headers[CONTENT_LENGTH] = str(size)
# set content-type
if CONTENT_TYPE not in headers:
headers[CONTENT_TYPE] = body.content_type
# copy payload headers
if body.headers:
for (key, value) in body.headers.items():
if key not in headers:
headers[key] = value
self._compressed_body = None
@property
def text(self):
if self._body is None:
return None
return self._body.decode(self.charset or 'utf-8')
@text.setter
def text(self, text):
assert text is None or isinstance(text, str), \
"text argument must be str (%r)" % type(text)
if self.content_type == 'application/octet-stream':
self.content_type = 'text/plain'
if self.charset is None:
self.charset = 'utf-8'
self._body = text.encode(self.charset)
self._body_payload = False
self._compressed_body = None
@property
def content_length(self):
if self._chunked:
return None
if hdrs.CONTENT_LENGTH in self.headers:
return super().content_length
if self._compressed_body is not None:
# Return length of the compressed body
return len(self._compressed_body)
elif self._body_payload:
# A payload without content length, or a compressed payload
return None
elif self._body is not None:
return len(self._body)
else:
return 0
@content_length.setter
def content_length(self, value):
raise RuntimeError("Content length is set automatically")
async def write_eof(self):
if self._eof_sent:
return
if self._compressed_body is not None:
body = self._compressed_body
else:
body = self._body
if body is not None:
if (self._req._method == hdrs.METH_HEAD or
self._status in [204, 304]):
await super().write_eof()
elif self._body_payload:
await body.write(self._payload_writer)
await super().write_eof()
else:
await super().write_eof(body)
else:
await super().write_eof()
def _start(self, request):
if not self._chunked and hdrs.CONTENT_LENGTH not in self._headers:
if not self._body_payload:
if self._body is not None:
self._headers[hdrs.CONTENT_LENGTH] = str(len(self._body))
else:
self._headers[hdrs.CONTENT_LENGTH] = '0'
return super()._start(request)
def _do_start_compression(self, coding):
if self._body_payload or self._chunked:
return super()._do_start_compression(coding)
if coding != ContentCoding.identity:
# Instead of using _payload_writer.enable_compression,
# compress the whole body
zlib_mode = (16 + zlib.MAX_WBITS
if coding.value == 'gzip' else -zlib.MAX_WBITS)
compressobj = zlib.compressobj(wbits=zlib_mode)
self._compressed_body = compressobj.compress(self._body) +\
compressobj.flush()
self._headers[hdrs.CONTENT_ENCODING] = coding.value
self._headers[hdrs.CONTENT_LENGTH] = \
str(len(self._compressed_body))
def json_response(data=sentinel, *, text=None, body=None, status=200,
reason=None, headers=None, content_type='application/json',
dumps=json.dumps):
if data is not sentinel:
if text or body:
raise ValueError(
"only one of data, text, or body should be specified"
)
else:
text = dumps(data)
return Response(text=text, body=body, status=status, reason=reason,
headers=headers, content_type=content_type)
|