2015-05-28 15:46:30 +00:00
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from .. import utils, odict, tcp
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from frame import *
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2015-05-25 10:10:21 +00:00
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# "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
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CLIENT_CONNECTION_PREFACE = '505249202a20485454502f322e300d0a0d0a534d0d0a0d0a'
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ERROR_CODES = utils.BiDi(
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2015-05-27 09:18:54 +00:00
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NO_ERROR=0x0,
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PROTOCOL_ERROR=0x1,
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INTERNAL_ERROR=0x2,
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FLOW_CONTROL_ERROR=0x3,
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SETTINGS_TIMEOUT=0x4,
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STREAM_CLOSED=0x5,
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FRAME_SIZE_ERROR=0x6,
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REFUSED_STREAM=0x7,
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CANCEL=0x8,
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COMPRESSION_ERROR=0x9,
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CONNECT_ERROR=0xa,
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ENHANCE_YOUR_CALM=0xb,
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INADEQUATE_SECURITY=0xc,
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HTTP_1_1_REQUIRED=0xd
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)
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2015-05-28 15:46:30 +00:00
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class H2Client(tcp.TCPClient):
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ALPN_PROTO_H2 = b'h2'
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DEFAULT_SETTINGS = {
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SettingsFrame.SETTINGS.SETTINGS_HEADER_TABLE_SIZE: 4096,
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SettingsFrame.SETTINGS.SETTINGS_ENABLE_PUSH: 1,
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SettingsFrame.SETTINGS.SETTINGS_MAX_CONCURRENT_STREAMS: None,
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SettingsFrame.SETTINGS.SETTINGS_INITIAL_WINDOW_SIZE: 2 ^ 16 - 1,
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SettingsFrame.SETTINGS.SETTINGS_MAX_FRAME_SIZE: 2 ^ 14,
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SettingsFrame.SETTINGS.SETTINGS_MAX_HEADER_LIST_SIZE: None,
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}
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def __init__(self, address, source_address=None):
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super(H2Client, self).__init__(address, source_address)
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self.settings = self.DEFAULT_SETTINGS.copy()
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def connect(self, send_preface=True):
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super(H2Client, self).connect()
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self.convert_to_ssl(alpn_protos=[self.ALPN_PROTO_H2])
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alp = self.get_alpn_proto_negotiated()
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if alp != b'h2':
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raise NotImplementedError("H2Client can not handle unknown protocol: %s" % alp)
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print "-> Successfully negotiated 'h2' application layer protocol."
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if send_preface:
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self.wfile.write(bytes(CLIENT_CONNECTION_PREFACE.decode('hex')))
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self.send_frame(SettingsFrame())
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frame = Frame.from_file(self.rfile)
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print frame.human_readable()
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assert isinstance(frame, SettingsFrame)
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self.apply_settings(frame.settings)
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print "-> Connection Preface completed."
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print "-> H2Client is ready..."
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def send_frame(self, frame):
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self.wfile.write(frame.to_bytes())
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self.wfile.flush()
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def read_frame(self):
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frame = Frame.from_file(self.rfile)
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if isinstance(frame, SettingsFrame):
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self.apply_settings(frame.settings)
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return frame
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def apply_settings(self, settings):
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for setting, value in settings.items():
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old_value = self.settings[setting]
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if not old_value:
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old_value = '-'
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self.settings[setting] = value
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print "-> Setting changed: %s to %d (was %s)" %
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(SettingsFrame.SETTINGS.get_name(setting), value, str(old_value))
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self.send_frame(SettingsFrame(flags=Frame.FLAG_ACK))
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print "-> New settings acknowledged."
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