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| 1 | +#!/usr/bin/env python |
| 2 | + |
| 3 | +import collections |
| 4 | +import json |
| 5 | +import ssl |
| 6 | + |
| 7 | +import tornado.gen |
| 8 | +import tornado.ioloop |
| 9 | +import tornado.iostream |
| 10 | +import tornado.tcpserver |
| 11 | + |
| 12 | +from h2.connection import H2Connection |
| 13 | +from h2.events import RequestReceived, DataReceived |
| 14 | + |
| 15 | + |
| 16 | +def create_ssl_context(certfile, keyfile): |
| 17 | + ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH) |
| 18 | + ssl_context.options |= ( |
| 19 | + ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | ssl.OP_NO_COMPRESSION |
| 20 | + ) |
| 21 | + ssl_context.set_ciphers("ECDHE+AESGCM") |
| 22 | + ssl_context.load_cert_chain(certfile=certfile, keyfile=keyfile) |
| 23 | + ssl_context.set_alpn_protocols(["h2"]) |
| 24 | + return ssl_context |
| 25 | + |
| 26 | + |
| 27 | +class H2Server(tornado.tcpserver.TCPServer): |
| 28 | + |
| 29 | + @tornado.gen.coroutine |
| 30 | + def handle_stream(self, stream, address): |
| 31 | + handler = EchoHeadersHandler(stream) |
| 32 | + yield handler.handle() |
| 33 | + |
| 34 | + |
| 35 | +class EchoHeadersHandler(object): |
| 36 | + |
| 37 | + def __init__(self, stream): |
| 38 | + self.stream = stream |
| 39 | + self.conn = H2Connection(client_side=False) |
| 40 | + |
| 41 | + @tornado.gen.coroutine |
| 42 | + def handle(self): |
| 43 | + self.conn.initiate_connection() |
| 44 | + yield self.stream.write(self.conn.data_to_send()) |
| 45 | + |
| 46 | + while True: |
| 47 | + try: |
| 48 | + data = yield self.stream.read_bytes(65535, partial=True) |
| 49 | + if not data: |
| 50 | + break |
| 51 | + |
| 52 | + events = self.conn.receive_data(data) |
| 53 | + for event in events: |
| 54 | + if isinstance(event, RequestReceived): |
| 55 | + self.request_received(event.headers, event.stream_id) |
| 56 | + elif isinstance(event, DataReceived): |
| 57 | + self.conn.reset_stream(event.stream_id) |
| 58 | + |
| 59 | + yield self.stream.write(self.conn.data_to_send()) |
| 60 | + |
| 61 | + except tornado.iostream.StreamClosedError: |
| 62 | + break |
| 63 | + |
| 64 | + def request_received(self, headers, stream_id): |
| 65 | + headers = collections.OrderedDict(headers) |
| 66 | + data = json.dumps({'headers': headers}, indent=4).encode('utf-8') |
| 67 | + |
| 68 | + response_headers = ( |
| 69 | + (':status', '200'), |
| 70 | + ('content-type', 'application/json'), |
| 71 | + ('content-length', len(data)), |
| 72 | + ('server', 'tornado-h2'), |
| 73 | + ) |
| 74 | + self.conn.send_headers(stream_id, response_headers) |
| 75 | + self.conn.send_data(stream_id, data, end_stream=True) |
| 76 | + |
| 77 | + |
| 78 | +if __name__ == '__main__': |
| 79 | + ssl_context = create_ssl_context('server.crt', 'server.key') |
| 80 | + server = H2Server(ssl_options=ssl_context) |
| 81 | + server.listen(8888) |
| 82 | + io_loop = tornado.ioloop.IOLoop.current() |
| 83 | + io_loop.start() |
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