_http_parser.pyx
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#cython: language_level=3 # # Based on https://github.com/MagicStack/httptools # from cpython cimport ( Py_buffer, PyBUF_SIMPLE, PyBuffer_Release, PyBytes_AsString, PyBytes_AsStringAndSize, PyObject_GetBuffer, ) from cpython.mem cimport PyMem_Free, PyMem_Malloc from libc.limits cimport ULLONG_MAX from libc.string cimport memcpy from multidict import CIMultiDict as _CIMultiDict, CIMultiDictProxy as _CIMultiDictProxy from yarl import URL as _URL from aiohttp import hdrs from aiohttp.helpers import DEBUG from .http_exceptions import ( BadHttpMessage, BadStatusLine, ContentLengthError, InvalidHeader, InvalidURLError, LineTooLong, PayloadEncodingError, TransferEncodingError, ) from .http_parser import DeflateBuffer as _DeflateBuffer from .http_writer import ( HttpVersion as _HttpVersion, HttpVersion10 as _HttpVersion10, HttpVersion11 as _HttpVersion11, ) from .streams import EMPTY_PAYLOAD as _EMPTY_PAYLOAD, StreamReader as _StreamReader cimport cython from aiohttp cimport _cparser as cparser include "_headers.pxi" from aiohttp cimport _find_header DEF DEFAULT_FREELIST_SIZE = 250 cdef extern from "Python.h": int PyByteArray_Resize(object, Py_ssize_t) except -1 Py_ssize_t PyByteArray_Size(object) except -1 char* PyByteArray_AsString(object) __all__ = ('HttpRequestParser', 'HttpResponseParser', 'RawRequestMessage', 'RawResponseMessage') cdef object URL = _URL cdef object URL_build = URL.build cdef object CIMultiDict = _CIMultiDict cdef object CIMultiDictProxy = _CIMultiDictProxy cdef object HttpVersion = _HttpVersion cdef object HttpVersion10 = _HttpVersion10 cdef object HttpVersion11 = _HttpVersion11 cdef object SEC_WEBSOCKET_KEY1 = hdrs.SEC_WEBSOCKET_KEY1 cdef object CONTENT_ENCODING = hdrs.CONTENT_ENCODING cdef object EMPTY_PAYLOAD = _EMPTY_PAYLOAD cdef object StreamReader = _StreamReader cdef object DeflateBuffer = _DeflateBuffer cdef inline object extend(object buf, const char* at, size_t length): cdef Py_ssize_t s cdef char* ptr s = PyByteArray_Size(buf) PyByteArray_Resize(buf, s + length) ptr = PyByteArray_AsString(buf) memcpy(ptr + s, at, length) DEF METHODS_COUNT = 46; cdef list _http_method = [] for i in range(METHODS_COUNT): _http_method.append( cparser.llhttp_method_name(<cparser.llhttp_method_t> i).decode('ascii')) cdef inline str http_method_str(int i): if i < METHODS_COUNT: return <str>_http_method[i] else: return "<unknown>" cdef inline object find_header(bytes raw_header): cdef Py_ssize_t size cdef char *buf cdef int idx PyBytes_AsStringAndSize(raw_header, &buf, &size) idx = _find_header.find_header(buf, size) if idx == -1: return raw_header.decode('utf-8', 'surrogateescape') return headers[idx] @cython.freelist(DEFAULT_FREELIST_SIZE) cdef class RawRequestMessage: cdef readonly str method cdef readonly str path cdef readonly object version # HttpVersion cdef readonly object headers # CIMultiDict cdef readonly object raw_headers # tuple cdef readonly object should_close cdef readonly object compression cdef readonly object upgrade cdef readonly object chunked cdef readonly object url # yarl.URL def __init__(self, method, path, version, headers, raw_headers, should_close, compression, upgrade, chunked, url): self.method = method self.path = path self.version = version self.headers = headers self.raw_headers = raw_headers self.should_close = should_close self.compression = compression self.upgrade = upgrade self.chunked = chunked self.url = url def __repr__(self): info = [] info.append(("method", self.method)) info.append(("path", self.path)) info.append(("version", self.version)) info.append(("headers", self.headers)) info.append(("raw_headers", self.raw_headers)) info.append(("should_close", self.should_close)) info.append(("compression", self.compression)) info.append(("upgrade", self.upgrade)) info.append(("chunked", self.chunked)) info.append(("url", self.url)) sinfo = ', '.join(name + '=' + repr(val) for name, val in info) return '<RawRequestMessage(' + sinfo + ')>' def _replace(self, **dct): cdef RawRequestMessage ret ret = _new_request_message(self.method, self.path, self.version, self.headers, self.raw_headers, self.should_close, self.compression, self.upgrade, self.chunked, self.url) if "method" in dct: ret.method = dct["method"] if "path" in dct: ret.path = dct["path"] if "version" in dct: ret.version = dct["version"] if "headers" in dct: ret.headers = dct["headers"] if "raw_headers" in dct: ret.raw_headers = dct["raw_headers"] if "should_close" in dct: ret.should_close = dct["should_close"] if "compression" in dct: ret.compression = dct["compression"] if "upgrade" in dct: ret.upgrade = dct["upgrade"] if "chunked" in dct: ret.chunked = dct["chunked"] if "url" in dct: ret.url = dct["url"] return ret cdef _new_request_message(str method, str path, object version, object headers, object raw_headers, bint should_close, object compression, bint upgrade, bint chunked, object url): cdef RawRequestMessage ret ret = RawRequestMessage.__new__(RawRequestMessage) ret.method = method ret.path = path ret.version = version ret.headers = headers ret.raw_headers = raw_headers ret.should_close = should_close ret.compression = compression ret.upgrade = upgrade ret.chunked = chunked ret.url = url return ret @cython.freelist(DEFAULT_FREELIST_SIZE) cdef class RawResponseMessage: cdef readonly object version # HttpVersion cdef readonly int code cdef readonly str reason cdef readonly object headers # CIMultiDict cdef readonly object raw_headers # tuple cdef readonly object should_close cdef readonly object compression cdef readonly object upgrade cdef readonly object chunked def __init__(self, version, code, reason, headers, raw_headers, should_close, compression, upgrade, chunked): self.version = version self.code = code self.reason = reason self.headers = headers self.raw_headers = raw_headers self.should_close = should_close self.compression = compression self.upgrade = upgrade self.chunked = chunked def __repr__(self): info = [] info.append(("version", self.version)) info.append(("code", self.code)) info.append(("reason", self.reason)) info.append(("headers", self.headers)) info.append(("raw_headers", self.raw_headers)) info.append(("should_close", self.should_close)) info.append(("compression", self.compression)) info.append(("upgrade", self.upgrade)) info.append(("chunked", self.chunked)) sinfo = ', '.join(name + '=' + repr(val) for name, val in info) return '<RawResponseMessage(' + sinfo + ')>' cdef _new_response_message(object version, int code, str reason, object headers, object raw_headers, bint should_close, object compression, bint upgrade, bint chunked): cdef RawResponseMessage ret ret = RawResponseMessage.__new__(RawResponseMessage) ret.version = version ret.code = code ret.reason = reason ret.headers = headers ret.raw_headers = raw_headers ret.should_close = should_close ret.compression = compression ret.upgrade = upgrade ret.chunked = chunked return ret @cython.internal cdef class HttpParser: cdef: cparser.llhttp_t* _cparser cparser.llhttp_settings_t* _csettings bytearray _raw_name bytearray _raw_value bint _has_value object _protocol object _loop object _timer size_t _max_line_size size_t _max_field_size size_t _max_headers bint _response_with_body bint _read_until_eof bint _started object _url bytearray _buf str _path str _reason object _headers list _raw_headers bint _upgraded list _messages object _payload bint _payload_error object _payload_exception object _last_error bint _auto_decompress int _limit str _content_encoding 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, cparser.llhttp_type mode, object protocol, object loop, int limit, object timer=None, size_t max_line_size=8190, size_t max_headers=32768, size_t max_field_size=8190, payload_exception=None, bint response_with_body=True, bint read_until_eof=False, bint auto_decompress=True, ): cparser.llhttp_settings_init(self._csettings) cparser.llhttp_init(self._cparser, mode, self._csettings) self._cparser.data = <void*>self self._cparser.content_length = 0 self._protocol = protocol self._loop = loop self._timer = timer self._buf = bytearray() self._payload = None self._payload_error = 0 self._payload_exception = payload_exception self._messages = [] self._raw_name = bytearray() self._raw_value = bytearray() self._has_value = False self._max_line_size = max_line_size self._max_headers = max_headers self._max_field_size = max_field_size self._response_with_body = response_with_body self._read_until_eof = read_until_eof self._upgraded = False self._auto_decompress = auto_decompress self._content_encoding = None self._csettings.on_url = cb_on_url self._csettings.on_status = cb_on_status self._csettings.on_header_field = cb_on_header_field self._csettings.on_header_value = cb_on_header_value self._csettings.on_headers_complete = cb_on_headers_complete self._csettings.on_body = cb_on_body self._csettings.on_message_begin = cb_on_message_begin self._csettings.on_message_complete = cb_on_message_complete self._csettings.on_chunk_header = cb_on_chunk_header self._csettings.on_chunk_complete = cb_on_chunk_complete self._last_error = None self._limit = limit cdef _process_header(self): if self._raw_name: raw_name = bytes(self._raw_name) raw_value = bytes(self._raw_value) name = find_header(raw_name) value = raw_value.decode('utf-8', 'surrogateescape') self._headers.add(name, value) if name is CONTENT_ENCODING: self._content_encoding = value PyByteArray_Resize(self._raw_name, 0) PyByteArray_Resize(self._raw_value, 0) self._has_value = False self._raw_headers.append((raw_name, raw_value)) cdef _on_header_field(self, char* at, size_t length): cdef Py_ssize_t size cdef char *buf if self._has_value: self._process_header() size = PyByteArray_Size(self._raw_name) PyByteArray_Resize(self._raw_name, size + length) buf = PyByteArray_AsString(self._raw_name) memcpy(buf + size, at, length) cdef _on_header_value(self, char* at, size_t length): cdef Py_ssize_t size cdef char *buf size = PyByteArray_Size(self._raw_value) PyByteArray_Resize(self._raw_value, size + length) buf = PyByteArray_AsString(self._raw_value) memcpy(buf + size, at, length) self._has_value = True cdef _on_headers_complete(self): self._process_header() method = http_method_str(self._cparser.method) should_close = not cparser.llhttp_should_keep_alive(self._cparser) upgrade = self._cparser.upgrade chunked = self._cparser.flags & cparser.F_CHUNKED raw_headers = tuple(self._raw_headers) headers = CIMultiDictProxy(self._headers) if upgrade or self._cparser.method == cparser.HTTP_CONNECT: self._upgraded = True # do not support old websocket spec if SEC_WEBSOCKET_KEY1 in headers: raise InvalidHeader(SEC_WEBSOCKET_KEY1) encoding = None enc = self._content_encoding if enc is not None: self._content_encoding = None enc = enc.lower() if enc in ('gzip', 'deflate', 'br'): encoding = enc if self._cparser.type == cparser.HTTP_REQUEST: msg = _new_request_message( method, self._path, self.http_version(), headers, raw_headers, should_close, encoding, upgrade, chunked, self._url) else: msg = _new_response_message( self.http_version(), self._cparser.status_code, self._reason, headers, raw_headers, should_close, encoding, upgrade, chunked) if ( ULLONG_MAX > self._cparser.content_length > 0 or chunked or self._cparser.method == cparser.HTTP_CONNECT or (self._cparser.status_code >= 199 and self._cparser.content_length == 0 and self._read_until_eof) ): payload = StreamReader( self._protocol, timer=self._timer, loop=self._loop, limit=self._limit) else: payload = EMPTY_PAYLOAD self._payload = payload if encoding is not None and self._auto_decompress: self._payload = DeflateBuffer(payload, encoding) if not self._response_with_body: payload = EMPTY_PAYLOAD self._messages.append((msg, payload)) cdef _on_message_complete(self): self._payload.feed_eof() self._payload = None cdef _on_chunk_header(self): self._payload.begin_http_chunk_receiving() cdef _on_chunk_complete(self): self._payload.end_http_chunk_receiving() cdef object _on_status_complete(self): pass cdef inline http_version(self): cdef cparser.llhttp_t* parser = self._cparser if parser.http_major == 1: if parser.http_minor == 0: return HttpVersion10 elif parser.http_minor == 1: return HttpVersion11 return HttpVersion(parser.http_major, parser.http_minor) ### Public API ### def feed_eof(self): cdef bytes desc if self._payload is not None: if self._cparser.flags & cparser.F_CHUNKED: raise TransferEncodingError( "Not enough data for satisfy transfer length header.") elif self._cparser.flags & cparser.F_CONTENT_LENGTH: raise ContentLengthError( "Not enough data for satisfy content length header.") elif cparser.llhttp_get_errno(self._cparser) != cparser.HPE_OK: desc = cparser.llhttp_get_error_reason(self._cparser) raise PayloadEncodingError(desc.decode('latin-1')) else: self._payload.feed_eof() elif self._started: self._on_headers_complete() if self._messages: return self._messages[-1][0] def feed_data(self, data): cdef: size_t data_len size_t nb cdef cparser.llhttp_errno_t errno PyObject_GetBuffer(data, &self.py_buf, PyBUF_SIMPLE) data_len = <size_t>self.py_buf.len errno = cparser.llhttp_execute( self._cparser, <char*>self.py_buf.buf, data_len) if errno is cparser.HPE_PAUSED_UPGRADE: cparser.llhttp_resume_after_upgrade(self._cparser) nb = cparser.llhttp_get_error_pos(self._cparser) - <char*>self.py_buf.buf PyBuffer_Release(&self.py_buf) if errno not in (cparser.HPE_OK, cparser.HPE_PAUSED_UPGRADE): if self._payload_error == 0: if self._last_error is not None: ex = self._last_error self._last_error = None else: after = cparser.llhttp_get_error_pos(self._cparser) before = data[:after - <char*>self.py_buf.buf] after_b = after.split(b"\r\n", 1)[0] before = before.rsplit(b"\r\n", 1)[-1] data = before + after_b pointer = " " * (len(repr(before))-1) + "^" ex = parser_error_from_errno(self._cparser, data, pointer) self._payload = None raise ex if self._messages: messages = self._messages self._messages = [] else: messages = () if self._upgraded: return messages, True, data[nb:] else: return messages, False, b'' def set_upgraded(self, val): self._upgraded = val cdef class HttpRequestParser(HttpParser): def __init__( self, protocol, loop, int limit, timer=None, size_t max_line_size=8190, size_t max_headers=32768, size_t max_field_size=8190, payload_exception=None, bint response_with_body=True, bint read_until_eof=False, bint auto_decompress=True, ): self._init(cparser.HTTP_REQUEST, protocol, loop, limit, timer, max_line_size, max_headers, max_field_size, payload_exception, response_with_body, read_until_eof, auto_decompress) cdef object _on_status_complete(self): cdef int idx1, idx2 if not self._buf: return self._path = self._buf.decode('utf-8', 'surrogateescape') try: idx3 = len(self._path) if self._cparser.method == cparser.HTTP_CONNECT: # authority-form, # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.3 self._url = URL.build(authority=self._path, encoded=True) elif idx3 > 1 and self._path[0] == '/': # origin-form, # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1 idx1 = self._path.find("?") if idx1 == -1: query = "" idx2 = self._path.find("#") if idx2 == -1: path = self._path fragment = "" else: path = self._path[0: idx2] fragment = self._path[idx2+1:] else: path = self._path[0:idx1] idx1 += 1 idx2 = self._path.find("#", idx1+1) if idx2 == -1: query = self._path[idx1:] fragment = "" else: query = self._path[idx1: idx2] fragment = self._path[idx2+1:] self._url = URL.build( path=path, query_string=query, fragment=fragment, encoded=True, ) else: # absolute-form for proxy maybe, # https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.2 self._url = URL(self._path, encoded=True) finally: PyByteArray_Resize(self._buf, 0) cdef class HttpResponseParser(HttpParser): def __init__( self, protocol, loop, int limit, timer=None, size_t max_line_size=8190, size_t max_headers=32768, size_t max_field_size=8190, payload_exception=None, bint response_with_body=True, bint read_until_eof=False, bint auto_decompress=True ): self._init(cparser.HTTP_RESPONSE, protocol, loop, limit, timer, max_line_size, max_headers, max_field_size, payload_exception, response_with_body, read_until_eof, auto_decompress) # Use strict parsing on dev mode, so users are warned about broken servers. if not DEBUG: cparser.llhttp_set_lenient_headers(self._cparser, 1) cparser.llhttp_set_lenient_optional_cr_before_lf(self._cparser, 1) cparser.llhttp_set_lenient_spaces_after_chunk_size(self._cparser, 1) cdef object _on_status_complete(self): if self._buf: self._reason = self._buf.decode('utf-8', 'surrogateescape') PyByteArray_Resize(self._buf, 0) else: self._reason = self._reason or '' cdef int cb_on_message_begin(cparser.llhttp_t* parser) except -1: cdef HttpParser pyparser = <HttpParser>parser.data pyparser._started = True pyparser._headers = CIMultiDict() pyparser._raw_headers = [] PyByteArray_Resize(pyparser._buf, 0) pyparser._path = None pyparser._reason = None 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: if length > pyparser._max_line_size: raise LineTooLong( 'Status line is too long', pyparser._max_line_size, length) extend(pyparser._buf, at, length) except BaseException as ex: pyparser._last_error = ex return -1 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 cdef str reason try: if length > pyparser._max_line_size: raise LineTooLong( 'Status line is too long', pyparser._max_line_size, length) extend(pyparser._buf, at, length) except BaseException as ex: pyparser._last_error = ex return -1 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 cdef Py_ssize_t size try: pyparser._on_status_complete() size = len(pyparser._raw_name) + length if size > pyparser._max_field_size: raise LineTooLong( 'Header name is too long', pyparser._max_field_size, size) 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.llhttp_t* parser, const char *at, size_t length) except -1: cdef HttpParser pyparser = <HttpParser>parser.data cdef Py_ssize_t size try: size = len(pyparser._raw_value) + length if size > pyparser._max_field_size: raise LineTooLong( 'Header value is too long', pyparser._max_field_size, size) 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.llhttp_t* parser) except -1: cdef HttpParser pyparser = <HttpParser>parser.data try: pyparser._on_status_complete() pyparser._on_headers_complete() except BaseException as exc: pyparser._last_error = exc return -1 else: if ( pyparser._cparser.upgrade or pyparser._cparser.method == cparser.HTTP_CONNECT ): return 2 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 cdef bytes body = at[:length] try: pyparser._payload.feed_data(body, length) except BaseException as exc: if pyparser._payload_exception is not None: pyparser._payload.set_exception(pyparser._payload_exception(str(exc))) else: pyparser._payload.set_exception(exc) pyparser._payload_error = 1 return -1 else: return 0 cdef int cb_on_message_complete(cparser.llhttp_t* parser) except -1: cdef HttpParser pyparser = <HttpParser>parser.data try: pyparser._started = False pyparser._on_message_complete() except BaseException as exc: pyparser._last_error = exc 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 exc: pyparser._last_error = exc 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 exc: pyparser._last_error = exc return -1 else: return 0 cdef parser_error_from_errno(cparser.llhttp_t* parser, data, pointer): cdef cparser.llhttp_errno_t errno = cparser.llhttp_get_errno(parser) cdef bytes desc = cparser.llhttp_get_error_reason(parser) err_msg = "{}:\n\n {!r}\n {}".format(desc.decode("latin-1"), data, pointer) 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_INVALID_CONSTANT, cparser.HPE_INVALID_HEADER_TOKEN, cparser.HPE_INVALID_CONTENT_LENGTH, cparser.HPE_INVALID_CHUNK_SIZE, cparser.HPE_INVALID_EOF_STATE, cparser.HPE_INVALID_TRANSFER_ENCODING}: return BadHttpMessage(err_msg) elif errno in {cparser.HPE_INVALID_STATUS, cparser.HPE_INVALID_METHOD, cparser.HPE_INVALID_VERSION}: return BadStatusLine(error=err_msg) elif errno == cparser.HPE_INVALID_URL: return InvalidURLError(err_msg) return BadHttpMessage(err_msg)
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