diff options
Diffstat (limited to 'netlib')
| -rw-r--r-- | netlib/http2/protocol.py | 63 |
1 files changed, 43 insertions, 20 deletions
diff --git a/netlib/http2/protocol.py b/netlib/http2/protocol.py index feac220c..4b69764f 100644 --- a/netlib/http2/protocol.py +++ b/netlib/http2/protocol.py @@ -26,12 +26,13 @@ class HTTP2Protocol(object): ) # "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" - CLIENT_CONNECTION_PREFACE = '505249202a20485454502f322e300d0a0d0a534d0d0a0d0a' + CLIENT_CONNECTION_PREFACE = '505249202a20485454502f322e300d0a0d0a534d0d0a0d0a'.decode('hex') ALPN_PROTO_H2 = 'h2' - def __init__(self, tcp_client): - self.tcp_client = tcp_client + def __init__(self, tcp_handler, is_server=False): + self.tcp_handler = tcp_handler + self.is_server = is_server self.http2_settings = frame.HTTP2_DEFAULT_SETTINGS.copy() self.current_stream_id = None @@ -39,28 +40,39 @@ class HTTP2Protocol(object): self.decoder = Decoder() def check_alpn(self): - alp = self.tcp_client.get_alpn_proto_negotiated() + 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 perform_connection_preface(self): - self.tcp_client.wfile.write( - bytes(self.CLIENT_CONNECTION_PREFACE.decode('hex'))) - self.send_frame(frame.SettingsFrame(state=self)) - - # read server settings frame - frm = frame.Frame.from_file(self.tcp_client.rfile, self) + def _receive_settings(self): + frm = frame.Frame.from_file(self.tcp_handler.rfile, self) assert isinstance(frm, frame.SettingsFrame) self._apply_settings(frm.settings) - # read setting ACK frame + def _read_settings_ack(self): settings_ack_frame = self.read_frame() assert isinstance(settings_ack_frame, frame.SettingsFrame) assert settings_ack_frame.flags & frame.Frame.FLAG_ACK assert len(settings_ack_frame.settings) == 0 + def perform_server_connection_preface(self): + magic_length = len(self.CLIENT_CONNECTION_PREFACE) + magic = self.tcp_handler.rfile.safe_read(magic_length) + assert magic == self.CLIENT_CONNECTION_PREFACE + + self.send_frame(frame.SettingsFrame(state=self)) + self._receive_settings() + self._read_settings_ack() + + def perform_client_connection_preface(self): + self.tcp_handler.wfile.write(self.CLIENT_CONNECTION_PREFACE) + + self.send_frame(frame.SettingsFrame(state=self)) + self._receive_settings() + self._read_settings_ack() + def next_stream_id(self): if self.current_stream_id is None: self.current_stream_id = 1 @@ -70,11 +82,11 @@ class HTTP2Protocol(object): def send_frame(self, frame): raw_bytes = frame.to_bytes() - self.tcp_client.wfile.write(raw_bytes) - self.tcp_client.wfile.flush() + self.tcp_handler.wfile.write(raw_bytes) + self.tcp_handler.wfile.flush() def read_frame(self): - frm = frame.Frame.from_file(self.tcp_client.rfile, self) + frm = frame.Frame.from_file(self.tcp_handler.rfile, self) if isinstance(frm, frame.SettingsFrame): self._apply_settings(frm.settings) @@ -139,25 +151,36 @@ class HTTP2Protocol(object): self._create_body(body, stream_id))) def read_response(self): + headers, body = self._receive_transmission() + return headers[':status'], headers, body + + def read_request(self): + return self._receive_transmission() + + def _receive_transmission(self): + body_expected = True + header_block_fragment = b'' body = b'' while True: frm = self.read_frame() - if isinstance(frm, frame.HeadersFrame): + if isinstance(frm, frame.HeadersFrame) or isinstance(frm, frame.ContinuationFrame): header_block_fragment += frm.header_block_fragment - if frm.flags | frame.Frame.FLAG_END_HEADERS: + if frm.flags & frame.Frame.FLAG_END_HEADERS: + if frm.flags & frame.Frame.FLAG_END_STREAM: + body_expected = False break - while True: + while body_expected: frm = self.read_frame() if isinstance(frm, frame.DataFrame): body += frm.payload - if frm.flags | frame.Frame.FLAG_END_STREAM: + if frm.flags & frame.Frame.FLAG_END_STREAM: break headers = {} for header, value in self.decoder.decode(header_block_fragment): headers[header] = value - return headers[':status'], headers, body + return headers, body |