diff options
Diffstat (limited to 'netlib/http/http2')
| -rw-r--r-- | netlib/http/http2/protocol.py | 272 |
1 files changed, 175 insertions, 97 deletions
diff --git a/netlib/http/http2/protocol.py b/netlib/http/http2/protocol.py index 55b5ca76..a1ca4a18 100644 --- a/netlib/http/http2/protocol.py +++ b/netlib/http/http2/protocol.py @@ -1,12 +1,20 @@ from __future__ import (absolute_import, print_function, division) import itertools +import time from hpack.hpack import Encoder, Decoder from netlib import http, utils, odict +from netlib.http import semantics from . import frame -class HTTP2Protocol(object): +class TCPHandler(object): + def __init__(self, rfile, wfile=None): + self.rfile = rfile + self.wfile = wfile + + +class HTTP2Protocol(semantics.ProtocolMixin): ERROR_CODES = utils.BiDi( NO_ERROR=0x0, @@ -31,37 +39,146 @@ class HTTP2Protocol(object): ALPN_PROTO_H2 = 'h2' - def __init__(self, tcp_handler, is_server=False, dump_frames=False): - self.tcp_handler = tcp_handler + + def __init__( + self, + tcp_handler=None, + rfile=None, + wfile=None, + is_server=False, + dump_frames=False, + encoder=None, + decoder=None, + ): + self.tcp_handler = tcp_handler or TCPHandler(rfile, wfile) self.is_server = is_server + self.dump_frames = dump_frames + self.encoder = encoder or Encoder() + self.decoder = decoder or Decoder() self.http2_settings = frame.HTTP2_DEFAULT_SETTINGS.copy() self.current_stream_id = None - self.encoder = Encoder() - self.decoder = Decoder() self.connection_preface_performed = False - self.dump_frames = dump_frames - def check_alpn(self): - alp = self.tcp_handler.get_alpn_proto_negotiated() - if alp != self.ALPN_PROTO_H2: - raise NotImplementedError( - "HTTP2Protocol can not handle unknown ALP: %s" % alp) - return True + def read_request(self, include_body=True, body_size_limit=None, allow_empty=False): + self.perform_connection_preface() + + timestamp_start = time.time() + if hasattr(self.tcp_handler.rfile, "reset_timestamps"): + self.tcp_handler.rfile.reset_timestamps() + + stream_id, headers, body = self._receive_transmission(include_body) + + if hasattr(self.tcp_handler.rfile, "first_byte_timestamp"): + # more accurate timestamp_start + timestamp_start = self.tcp_handler.rfile.first_byte_timestamp + + timestamp_end = time.time() + + request = http.Request( + "relative", # TODO: use the correct value + headers.get_first(':method', 'GET'), + headers.get_first(':scheme', 'https'), + headers.get_first(':host', 'localhost'), + 443, # TODO: parse port number from host? + headers.get_first(':path', '/'), + (2, 0), + headers, + body, + timestamp_start, + timestamp_end, + ) + request.stream_id = stream_id - def _receive_settings(self, hide=False): - while True: - frm = self.read_frame(hide) - if isinstance(frm, frame.SettingsFrame): - break + return request - def _read_settings_ack(self, hide=False): # pragma no cover - while True: - frm = self.read_frame(hide) - if isinstance(frm, frame.SettingsFrame): - assert frm.flags & frame.Frame.FLAG_ACK - assert len(frm.settings) == 0 - break + def read_response(self, request_method='', body_size_limit=None, include_body=True): + self.perform_connection_preface() + + timestamp_start = time.time() + if hasattr(self.tcp_handler.rfile, "reset_timestamps"): + self.tcp_handler.rfile.reset_timestamps() + + stream_id, headers, body = self._receive_transmission(include_body) + + if hasattr(self.tcp_handler.rfile, "first_byte_timestamp"): + # more accurate timestamp_start + timestamp_start = self.tcp_handler.rfile.first_byte_timestamp + + if include_body: + timestamp_end = time.time() + else: + timestamp_end = None + + response = http.Response( + (2, 0), + int(headers.get_first(':status')), + "", + headers, + body, + timestamp_start=timestamp_start, + timestamp_end=timestamp_end, + ) + response.stream_id = stream_id + + return response + + + def assemble_request(self, request): + assert isinstance(request, semantics.Request) + + authority = self.tcp_handler.sni if self.tcp_handler.sni else self.tcp_handler.address.host + if self.tcp_handler.address.port != 443: + authority += ":%d" % self.tcp_handler.address.port + + headers = request.headers.copy() + + if not ':authority' in headers.keys(): + headers.add(':authority', bytes(authority), prepend=True) + if not ':scheme' in headers.keys(): + headers.add(':scheme', bytes(request.scheme), prepend=True) + if not ':path' in headers.keys(): + headers.add(':path', bytes(request.path), prepend=True) + if not ':method' in headers.keys(): + headers.add(':method', bytes(request.method), prepend=True) + + headers = headers.items() + + if hasattr(request, 'stream_id'): + stream_id = request.stream_id + else: + stream_id = self._next_stream_id() + + return list(itertools.chain( + self._create_headers(headers, stream_id, end_stream=(request.body is None or len(request.body) == 0)), + self._create_body(request.body, stream_id))) + + def assemble_response(self, response): + assert isinstance(response, semantics.Response) + + headers = response.headers.copy() + + if not ':status' in headers.keys(): + headers.add(':status', bytes(str(response.status_code)), prepend=True) + + headers = headers.items() + + if hasattr(response, 'stream_id'): + stream_id = response.stream_id + else: + stream_id = self._next_stream_id() + + return list(itertools.chain( + self._create_headers(headers, stream_id, end_stream=(response.body is None or len(response.body) == 0)), + self._create_body(response.body, stream_id), + )) + + def perform_connection_preface(self, force=False): + if force or not self.connection_preface_performed: + if self.is_server: + self.perform_server_connection_preface(force) + else: + self.perform_client_connection_preface(force) def perform_server_connection_preface(self, force=False): if force or not self.connection_preface_performed: @@ -83,18 +200,6 @@ class HTTP2Protocol(object): self.send_frame(frame.SettingsFrame(state=self), hide=True) self._receive_settings(hide=True) - def next_stream_id(self): - if self.current_stream_id is None: - if self.is_server: - # servers must use even stream ids - self.current_stream_id = 2 - else: - # clients must use odd stream ids - self.current_stream_id = 1 - else: - self.current_stream_id += 2 - return self.current_stream_id - def send_frame(self, frm, hide=False): raw_bytes = frm.to_bytes() self.tcp_handler.wfile.write(raw_bytes) @@ -111,6 +216,39 @@ class HTTP2Protocol(object): return frm + def check_alpn(self): + alp = self.tcp_handler.get_alpn_proto_negotiated() + if alp != self.ALPN_PROTO_H2: + raise NotImplementedError( + "HTTP2Protocol can not handle unknown ALP: %s" % alp) + return True + + def _receive_settings(self, hide=False): + while True: + frm = self.read_frame(hide) + if isinstance(frm, frame.SettingsFrame): + break + + def _read_settings_ack(self, hide=False): # pragma no cover + while True: + frm = self.read_frame(hide) + if isinstance(frm, frame.SettingsFrame): + assert frm.flags & frame.Frame.FLAG_ACK + assert len(frm.settings) == 0 + break + + def _next_stream_id(self): + if self.current_stream_id is None: + if self.is_server: + # servers must use even stream ids + self.current_stream_id = 2 + else: + # clients must use odd stream ids + self.current_stream_id = 1 + else: + self.current_stream_id += 2 + return self.current_stream_id + def _apply_settings(self, settings, hide=False): for setting, value in settings.items(): old_value = self.http2_settings[setting] @@ -164,51 +302,7 @@ class HTTP2Protocol(object): return [frm.to_bytes()] - - def create_request(self, method, path, headers=None, body=None): - if headers is None: - headers = [] - - authority = self.tcp_handler.sni if self.tcp_handler.sni else self.tcp_handler.address.host - if self.tcp_handler.address.port != 443: - authority += ":%d" % self.tcp_handler.address.port - - headers = [ - (b':method', bytes(method)), - (b':path', bytes(path)), - (b':scheme', b'https'), - (b':authority', authority), - ] + headers - - stream_id = self.next_stream_id() - - return list(itertools.chain( - self._create_headers(headers, stream_id, end_stream=(body is None)), - self._create_body(body, stream_id))) - - def read_response(self, *args): - stream_id, headers, body = self._receive_transmission() - - status = headers[':status'][0] - response = http.Response("HTTP/2", status, "", headers, body) - response.stream_id = stream_id - return response - - def read_request(self): - stream_id, headers, body = self._receive_transmission() - - form_in = "" - method = headers.get(':method', [''])[0] - scheme = headers.get(':scheme', [''])[0] - host = headers.get(':host', [''])[0] - port = '' # TODO: parse port number? - path = headers.get(':path', [''])[0] - - request = http.Request(form_in, method, scheme, host, port, path, "HTTP/2", headers, body) - request.stream_id = stream_id - return request - - def _receive_transmission(self): + def _receive_transmission(self, include_body=True): body_expected = True stream_id = 0 @@ -239,19 +333,3 @@ class HTTP2Protocol(object): headers.add(header, value) return stream_id, headers, body - - def create_response(self, code, stream_id=None, headers=None, body=None): - if headers is None: - headers = [] - if isinstance(headers, odict.ODict): - headers = headers.items() - - headers = [(b':status', bytes(str(code)))] + headers - - if not stream_id: - stream_id = self.next_stream_id() - - return list(itertools.chain( - self._create_headers(headers, stream_id, end_stream=(body is None)), - self._create_body(body, stream_id), - )) |