{{ message }}
Repository navigation
Expand file tree
/
Copy pathparser.pyx
More file actions
436 lines (346 loc) · 14.8 KB
/
Copy pathparser.pyx
File metadata and controls
436 lines (346 loc) · 14.8 KB
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
#cython: language_level=3
from __future__ import print_function
from typing import Optional
from cpython.mem cimport PyMem_Malloc, PyMem_Free
from cpython cimport PyObject_GetBuffer, PyBuffer_Release, PyBUF_SIMPLE, \
Py_buffer, PyBytes_AsString
from .python cimport PyMemoryView_Check, PyMemoryView_GET_BUFFER
from .errors import (HttpParserError,
HttpParserCallbackError,
HttpParserInvalidStatusError,
HttpParserInvalidMethodError,
HttpParserInvalidURLError,
HttpParserUpgrade)
cimport cython
from . cimport cparser
__all__ = ('HttpRequestParser', 'HttpResponseParser')
@cython.internal
cdef class HttpParser:
cdef:
cparser.llhttp_t* _cparser
cparser.llhttp_settings_t* _csettings
bytes _current_header_name
bytes _current_header_value
_proto_on_url, _proto_on_status, _proto_on_body, \
_proto_on_header, _proto_on_headers_complete, \
_proto_on_message_complete, _proto_on_chunk_header, \
_proto_on_chunk_complete, _proto_on_message_begin
object _last_error
Py_buffer py_buf
def __cinit__(self):
self._cparser = <cparser.llhttp_t*> \
PyMem_Malloc(sizeof(cparser.llhttp_t))
if self._cparser is NULL:
raise MemoryError()
self._csettings = <cparser.llhttp_settings_t*> \
PyMem_Malloc(sizeof(cparser.llhttp_settings_t))
if self._csettings is NULL:
raise MemoryError()
def __dealloc__(self):
PyMem_Free(self._cparser)
PyMem_Free(self._csettings)
cdef _init(self, protocol, cparser.llhttp_type_t mode):
cparser.llhttp_settings_init(self._csettings)
cparser.llhttp_init(self._cparser, mode, self._csettings)
self._cparser.data = <void*>self
self._current_header_name = None
self._current_header_value = None
self._proto_on_header = getattr(protocol, 'on_header', None)
if self._proto_on_header is not None:
self._csettings.on_header_field = cb_on_header_field
self._csettings.on_header_value = cb_on_header_value
self._proto_on_headers_complete = getattr(
protocol, 'on_headers_complete', None)
self._csettings.on_headers_complete = cb_on_headers_complete
self._proto_on_body = getattr(protocol, 'on_body', None)
if self._proto_on_body is not None:
self._csettings.on_body = cb_on_body
self._proto_on_message_begin = getattr(
protocol, 'on_message_begin', None)
if self._proto_on_message_begin is not None:
self._csettings.on_message_begin = cb_on_message_begin
self._proto_on_message_complete = getattr(
protocol, 'on_message_complete', None)
if self._proto_on_message_complete is not None:
self._csettings.on_message_complete = cb_on_message_complete
self._proto_on_chunk_header = getattr(
protocol, 'on_chunk_header', None)
self._csettings.on_chunk_header = cb_on_chunk_header
self._proto_on_chunk_complete = getattr(
protocol, 'on_chunk_complete', None)
self._csettings.on_chunk_complete = cb_on_chunk_complete
self._last_error = None
cdef _maybe_call_on_header(self):
if self._current_header_value is not None:
current_header_name = self._current_header_name
current_header_value = self._current_header_value
self._current_header_name = self._current_header_value = None
if self._proto_on_header is not None:
self._proto_on_header(current_header_name,
current_header_value)
cdef _on_header_field(self, bytes field):
self._maybe_call_on_header()
if self._current_header_name is None:
self._current_header_name = field
else:
self._current_header_name += field
cdef _on_header_value(self, bytes val):
if self._current_header_value is None:
self._current_header_value = val
else:
# This is unlikely, as mostly HTTP headers are one-line
self._current_header_value += val
cdef _on_headers_complete(self):
self._maybe_call_on_header()
if self._proto_on_headers_complete is not None:
self._proto_on_headers_complete()
cdef _on_chunk_header(self):
if (self._current_header_value is not None or
self._current_header_name is not None):
raise HttpParserError('invalid headers state')
if self._proto_on_chunk_header is not None:
self._proto_on_chunk_header()
cdef _on_chunk_complete(self):
self._maybe_call_on_header()
if self._proto_on_chunk_complete is not None:
self._proto_on_chunk_complete()
### Public API ###
def set_dangerous_leniencies(
self,
lenient_headers: Optional[bool] = None,
lenient_chunked_length: Optional[bool] = None,
lenient_keep_alive: Optional[bool] = None,
lenient_transfer_encoding: Optional[bool] = None,
lenient_version: Optional[bool] = None,
lenient_data_after_close: Optional[bool] = None,
lenient_optional_lf_after_cr: Optional[bool] = None,
lenient_optional_cr_before_lf: Optional[bool] = None,
lenient_optional_crlf_after_chunk: Optional[bool] = None,
lenient_spaces_after_chunk_size: Optional[bool] = None,
):
cdef cparser.llhttp_t* parser = self._cparser
if lenient_headers is not None:
cparser.llhttp_set_lenient_headers(
parser, lenient_headers)
if lenient_chunked_length is not None:
cparser.llhttp_set_lenient_chunked_length(
parser, lenient_chunked_length)
if lenient_keep_alive is not None:
cparser.llhttp_set_lenient_keep_alive(
parser, lenient_keep_alive)
if lenient_transfer_encoding is not None:
cparser.llhttp_set_lenient_transfer_encoding(
parser, lenient_transfer_encoding)
if lenient_version is not None:
cparser.llhttp_set_lenient_version(
parser, lenient_version)
if lenient_data_after_close is not None:
cparser.llhttp_set_lenient_data_after_close(
parser, lenient_data_after_close)
if lenient_optional_lf_after_cr is not None:
cparser.llhttp_set_lenient_optional_lf_after_cr(
parser, lenient_optional_lf_after_cr)
if lenient_optional_cr_before_lf is not None:
cparser.llhttp_set_lenient_optional_cr_before_lf(
parser, lenient_optional_cr_before_lf)
if lenient_optional_crlf_after_chunk is not None:
cparser.llhttp_set_lenient_optional_crlf_after_chunk(
parser, lenient_optional_crlf_after_chunk)
if lenient_spaces_after_chunk_size is not None:
cparser.llhttp_set_lenient_spaces_after_chunk_size(
parser, lenient_spaces_after_chunk_size)
def get_http_version(self):
cdef cparser.llhttp_t* parser = self._cparser
return '{}.{}'.format(parser.http_major, parser.http_minor)
def should_keep_alive(self):
return bool(cparser.llhttp_should_keep_alive(self._cparser))
def should_upgrade(self):
cdef cparser.llhttp_t* parser = self._cparser
return bool(parser.upgrade)
def feed_data(self, data):
cdef:
size_t data_len
cparser.llhttp_errno_t err
Py_buffer *buf
bint owning_buf = False
const char* err_pos
if PyMemoryView_Check(data):
buf = PyMemoryView_GET_BUFFER(data)
data_len = <size_t>buf.len
err = cparser.llhttp_execute(
self._cparser,
<char*>buf.buf,
data_len)
else:
buf = &self.py_buf
PyObject_GetBuffer(data, buf, PyBUF_SIMPLE)
owning_buf = True
data_len = <size_t>buf.len
err = cparser.llhttp_execute(
self._cparser,
<char*>buf.buf,
data_len)
try:
if self._cparser.upgrade == 1 and err == cparser.HPE_PAUSED_UPGRADE:
err_pos = cparser.llhttp_get_error_pos(self._cparser)
# Immediately free the parser from "error" state, simulating
# http-parser behavior here because 1) we never had the API to
# allow users manually "resume after upgrade", and 2) the use
# case for resuming parsing is very rare.
cparser.llhttp_resume_after_upgrade(self._cparser)
# The err_pos here is specific for the input buf. So if we ever
# switch to the llhttp behavior (re-raise HttpParserUpgrade for
# successive calls to feed_data() until resume_after_upgrade is
# called), we have to store the result and keep our own state.
raise HttpParserUpgrade(err_pos - <char*>buf.buf)
finally:
if owning_buf:
PyBuffer_Release(buf)
if err != cparser.HPE_OK:
ex = parser_error_from_errno(
self._cparser,
<cparser.llhttp_errno_t> self._cparser.error)
if isinstance(ex, HttpParserCallbackError):
if self._last_error is not None:
ex.__context__ = self._last_error
self._last_error = None
raise ex
cdef class HttpRequestParser(HttpParser):
def __init__(self, protocol):
self._init(protocol, cparser.HTTP_REQUEST)
self._proto_on_url = getattr(protocol, 'on_url', None)
if self._proto_on_url is not None:
self._csettings.on_url = cb_on_url
def get_method(self):
cdef cparser.llhttp_t* parser = self._cparser
return cparser.llhttp_method_name(<cparser.llhttp_method_t> parser.method)
cdef class HttpResponseParser(HttpParser):
def __init__(self, protocol):
self._init(protocol, cparser.HTTP_RESPONSE)
self._proto_on_status = getattr(protocol, 'on_status', None)
if self._proto_on_status is not None:
self._csettings.on_status = cb_on_status
def get_status_code(self):
cdef cparser.llhttp_t* parser = self._cparser
return parser.status_code
cdef int cb_on_message_begin(cparser.llhttp_t* parser) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._proto_on_message_begin()
except BaseException as ex:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_url(cparser.llhttp_t* parser,
const char *at, size_t length) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._proto_on_url(at[:length])
except BaseException as ex:
cparser.llhttp_set_error_reason(parser, "`on_url` callback error")
pyparser._last_error = ex
return cparser.HPE_USER
else:
return 0
cdef int cb_on_status(cparser.llhttp_t* parser,
const char *at, size_t length) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._proto_on_status(at[:length])
except BaseException as ex:
cparser.llhttp_set_error_reason(parser, "`on_status` callback error")
pyparser._last_error = ex
return cparser.HPE_USER
else:
return 0
cdef int cb_on_header_field(cparser.llhttp_t* parser,
const char *at, size_t length) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._on_header_field(at[:length])
except BaseException as ex:
cparser.llhttp_set_error_reason(parser, "`on_header_field` callback error")
pyparser._last_error = ex
return cparser.HPE_USER
else:
return 0
cdef int cb_on_header_value(cparser.llhttp_t* parser,
const char *at, size_t length) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._on_header_value(at[:length])
except BaseException as ex:
cparser.llhttp_set_error_reason(parser, "`on_header_value` callback error")
pyparser._last_error = ex
return cparser.HPE_USER
else:
return 0
cdef int cb_on_headers_complete(cparser.llhttp_t* parser) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._on_headers_complete()
except BaseException as ex:
pyparser._last_error = ex
return -1
else:
if pyparser._cparser.upgrade:
return 1
else:
return 0
cdef int cb_on_body(cparser.llhttp_t* parser,
const char *at, size_t length) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._proto_on_body(at[:length])
except BaseException as ex:
cparser.llhttp_set_error_reason(parser, "`on_body` callback error")
pyparser._last_error = ex
return cparser.HPE_USER
else:
return 0
cdef int cb_on_message_complete(cparser.llhttp_t* parser) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._proto_on_message_complete()
except BaseException as ex:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_chunk_header(cparser.llhttp_t* parser) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._on_chunk_header()
except BaseException as ex:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_chunk_complete(cparser.llhttp_t* parser) except -1:
cdef HttpParser pyparser = <HttpParser>parser.data
try:
pyparser._on_chunk_complete()
except BaseException as ex:
pyparser._last_error = ex
return -1
else:
return 0
cdef parser_error_from_errno(cparser.llhttp_t* parser, cparser.llhttp_errno_t errno):
cdef bytes reason = cparser.llhttp_get_error_reason(parser)
if errno in (cparser.HPE_CB_MESSAGE_BEGIN,
cparser.HPE_CB_HEADERS_COMPLETE,
cparser.HPE_CB_MESSAGE_COMPLETE,
cparser.HPE_CB_CHUNK_HEADER,
cparser.HPE_CB_CHUNK_COMPLETE,
cparser.HPE_USER):
cls = HttpParserCallbackError
elif errno == cparser.HPE_INVALID_STATUS:
cls = HttpParserInvalidStatusError
elif errno == cparser.HPE_INVALID_METHOD:
cls = HttpParserInvalidMethodError
elif errno == cparser.HPE_INVALID_URL:
cls = HttpParserInvalidURLError
else:
cls = HttpParserError
return cls(reason.decode('latin-1'))
You can’t perform that action at this time.