Wrote basic connect()

experiments/socketIO_client/__init__.py

@@ -1,7 +1,83 @@
-class SocketIO(object):
+import json
+import requests
+import time
+
+
+class EngineIO(object):
+
+    _path = 'engine.io'
+    _engine_io_protocol = 3
+    _request_index = 0
 
     def __init__(self, host, port):
-        pass
+        url = 'http://%s:%s/%s/' % (host, port, self._path)
+        session = requests.Session()
+        response = session.get(url, params={
+            'EIO': self._engine_io_protocol,
+            'transport': 'polling',
+            't': self._get_timestamp(),
+        })
+        packs = _decode_content(response.content)
+        packet_type, packet = packs[0]
+        assert packet_type == 0
+        packet_json = json.loads(packet)
+        print(packet_json)
+        response = session.get(url, params={
+            'EIO': self._engine_io_protocol,
+            'transport': 'polling',
+            't': self._get_timestamp(),
+            'sid': packet_json['sid'],
+        })
+        packs = _decode_content(response.content)
+        for packet_type, packet in packs:
+            print 'engineIO_packet_type = %s' % packet_type
+            print 'socketIO_packet_type = %s' % packet[0]
+            print 'packet = %s' % packet[1:]
+
+    def _get_timestamp(self):
+        timestamp = '%s-%s' % (int(time.time() * 1000), self._request_index)
+        self._request_index += 1
+        return timestamp
+
+
+class SocketIO(EngineIO):
+
+    _path = 'socket.io'
+    _socket_io_protocol = 4
+
+    def __init__(self, host, port):
+        super(SocketIO, self).__init__(host, port)
 
     def on(self, event, callback):
         pass
+
+
+def _decode_content(content):
+    packs = []
+    index = 0
+    content_length = len(content)
+    while index < content_length:
+        index, packet_length = _read_packet_length(content, index)
+        index, packet = _read_packet(content, index, packet_length)
+        packet_type = int(packet[0])
+        packet_payload = packet[1:]
+        packs.append((packet_type, packet_payload))
+    return packs
+
+
+def _read_packet_length(content, index):
+    while ord(content[index]) != 0:
+        index += 1
+    index += 1
+    packet_length_string = ''
+    while ord(content[index]) != 255:
+        packet_length_string += str(ord(content[index]))
+        index += 1
+    return index, int(packet_length_string)
+
+
+def _read_packet(content, index, packet_length):
+    while ord(content[index]) == 255:
+        index += 1
+    packet = content[index:index + packet_length]
+    return index + packet_length, packet