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#cython: language_level=3
from __future__ import print_function
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', 'parse_url')
@cython.internal
cdef class HttpParser:
cdef:
cparser.http_parser* _cparser
cparser.http_parser_settings* _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.http_parser*> \
PyMem_Malloc(sizeof(cparser.http_parser))
if self._cparser is NULL:
raise MemoryError()
self._csettings = <cparser.http_parser_settings*> \
PyMem_Malloc(sizeof(cparser.http_parser_settings))
if self._csettings is NULL:
raise MemoryError()
def __dealloc__(self):
PyMem_Free(self._cparser)
PyMem_Free(self._csettings)
cdef _init(self, protocol, cparser.http_parser_type mode):
cparser.http_parser_init(self._cparser, mode)
self._cparser.data = <void*>self
cparser.http_parser_settings_init(self._csettings)
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 get_http_version(self):
cdef cparser.http_parser* parser = self._cparser
return '{}.{}'.format(parser.http_major, parser.http_minor)
def should_keep_alive(self):
return bool(cparser.http_should_keep_alive(self._cparser))
def should_upgrade(self):
cdef cparser.http_parser* parser = self._cparser
return bool(parser.upgrade)
def feed_data(self, data):
cdef:
size_t data_len
size_t nb
Py_buffer *buf
if PyMemoryView_Check(data):
buf = PyMemoryView_GET_BUFFER(data)
data_len = <size_t>buf.len
nb = cparser.http_parser_execute(
self._cparser,
self._csettings,
<char*>buf.buf,
data_len)
else:
buf = &self.py_buf
PyObject_GetBuffer(data, buf, PyBUF_SIMPLE)
data_len = <size_t>buf.len
nb = cparser.http_parser_execute(
self._cparser,
self._csettings,
<char*>buf.buf,
data_len)
PyBuffer_Release(buf)
if self._cparser.http_errno != cparser.HPE_OK:
ex = parser_error_from_errno(
<cparser.http_errno> self._cparser.http_errno)
if isinstance(ex, HttpParserCallbackError):
if self._last_error is not None:
ex.__context__ = self._last_error
self._last_error = None
raise ex
if self._cparser.upgrade:
raise HttpParserUpgrade(nb)
if nb != data_len:
raise HttpParserError('not all of the data was parsed')
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.http_parser* parser = self._cparser
return cparser.http_method_str(<cparser.http_method> 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.http_parser* parser = self._cparser
return parser.status_code
cdef int cb_on_message_begin(cparser.http_parser* 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.http_parser* 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:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_status(cparser.http_parser* 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:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_header_field(cparser.http_parser* 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:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_header_value(cparser.http_parser* 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:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_headers_complete(cparser.http_parser* 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.http_parser* 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:
pyparser._last_error = ex
return -1
else:
return 0
cdef int cb_on_message_complete(cparser.http_parser* 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.http_parser* 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.http_parser* 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.http_errno errno):
cdef bytes desc = cparser.http_errno_description(errno)
if errno in (cparser.HPE_CB_message_begin,
cparser.HPE_CB_url,
cparser.HPE_CB_header_field,
cparser.HPE_CB_header_value,
cparser.HPE_CB_headers_complete,
cparser.HPE_CB_body,
cparser.HPE_CB_message_complete,
cparser.HPE_CB_status,
cparser.HPE_CB_chunk_header,
cparser.HPE_CB_chunk_complete):
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(desc.decode('latin-1'))
@cython.freelist(250)
cdef class URL:
cdef readonly bytes schema
cdef readonly bytes host
cdef readonly object port
cdef readonly bytes path
cdef readonly bytes query
cdef readonly bytes fragment
cdef readonly bytes userinfo
def __cinit__(self, bytes schema, bytes host, object port, bytes path,
bytes query, bytes fragment, bytes userinfo):
self.schema = schema
self.host = host
self.port = port
self.path = path
self.query = query
self.fragment = fragment
self.userinfo = userinfo
def __repr__(self):
return ('<URL schema: {!r}, host: {!r}, port: {!r}, path: {!r}, '
'query: {!r}, fragment: {!r}, userinfo: {!r}>'
.format(self.schema, self.host, self.port, self.path,
self.query, self.fragment, self.userinfo))
def parse_url(url):
cdef:
Py_buffer py_buf
char* buf_data
cparser.http_parser_url* parsed
int res
bytes schema = None
bytes host = None
object port = None
bytes path = None
bytes query = None
bytes fragment = None
bytes userinfo = None
object result = None
int off
int ln
parsed = <cparser.http_parser_url*> \
PyMem_Malloc(sizeof(cparser.http_parser_url))
cparser.http_parser_url_init(parsed)
PyObject_GetBuffer(url, &py_buf, PyBUF_SIMPLE)
try:
buf_data = <char*>py_buf.buf
res = cparser.http_parser_parse_url(buf_data, py_buf.len, 0, parsed)
if res == 0:
if parsed.field_set & (1 << cparser.UF_SCHEMA):
off = parsed.field_data[<int>cparser.UF_SCHEMA].off
ln = parsed.field_data[<int>cparser.UF_SCHEMA].len
schema = buf_data[off:off+ln]
if parsed.field_set & (1 << cparser.UF_HOST):
off = parsed.field_data[<int>cparser.UF_HOST].off
ln = parsed.field_data[<int>cparser.UF_HOST].len
host = buf_data[off:off+ln]
if parsed.field_set & (1 << cparser.UF_PORT):
port = parsed.port
if parsed.field_set & (1 << cparser.UF_PATH):
off = parsed.field_data[<int>cparser.UF_PATH].off
ln = parsed.field_data[<int>cparser.UF_PATH].len
path = buf_data[off:off+ln]
if parsed.field_set & (1 << cparser.UF_QUERY):
off = parsed.field_data[<int>cparser.UF_QUERY].off
ln = parsed.field_data[<int>cparser.UF_QUERY].len
query = buf_data[off:off+ln]
if parsed.field_set & (1 << cparser.UF_FRAGMENT):
off = parsed.field_data[<int>cparser.UF_FRAGMENT].off
ln = parsed.field_data[<int>cparser.UF_FRAGMENT].len
fragment = buf_data[off:off+ln]
if parsed.field_set & (1 << cparser.UF_USERINFO):
off = parsed.field_data[<int>cparser.UF_USERINFO].off
ln = parsed.field_data[<int>cparser.UF_USERINFO].len
userinfo = buf_data[off:off+ln]
return URL(schema, host, port, path, query, fragment, userinfo)
else:
raise HttpParserInvalidURLError("invalid url {!r}".format(url))
finally:
PyBuffer_Release(&py_buf)
PyMem_Free(parsed)