1.斗鱼弹幕协议
到斗鱼官方开放平台看斗鱼通讯协议，网址“斗鱼开放平台”，登录后可查看
所以根据斗鱼协议做编码函数：
1 def msg_encode(msg):
2 #消息以 \0 结尾，并以utf-8编码
3 msg = msg + '\0'
4 msg_bytes = msg.encode('utf-8')
5 #消息长度 + 头部长度8
6 length_bytes = int.to_bytes(len(msg) + 8, 4, byteorder='little')
7 #斗鱼客户端发送消息类型 689
8 type = 689
9 type_bytes = int.to_bytes(type, 2, byteorder='little')
10 # 加密字段与保留字段，默认 0 长度各 1
11 end_bytes = int.to_bytes(0, 1, byteorder='little')
12 #按顺序相加 消息长度 + 消息长度 + 消息类型 + 加密字段 + 保留字段
13 head_bytes = length_bytes + length_bytes + type_bytes + end_bytes + end_bytes
14 #消息头部拼接消息内容
15 data = head_bytes + msg_bytes
16 return data
然后根据斗鱼协议做解码函数：
1 def msg_decode(msg_bytes): 2 #定义一个游标位置 3 cursor = 0 4 msg = [] 5 while cursor < len(msg_bytes): 6 #根据斗鱼协议，报文 前四位与第二个四位，都是消息长度，取前四位，转化成整型 7 content_length = int.from_bytes(msg_bytes[cursor: (cursor + 4) - 1], byteorder='little') 8 #报文长度不包含前4位，从第5位开始截取消息长度的字节流，并扣除前8位的协议头，取出正文，用utf-8编码成字符串 9 content = msg_bytes[(cursor + 4) + 8:(cursor + 4) + content_length - 1].decode(encoding='utf-8', 10 errors='ignore') 11 msg.append(content) 12 cursor = (cursor + 4) + content_length 13 # print(msg) 14 return msg
解码后的消息需要反序列化：
1 def msg_format(msg_str):
2 try:
3 msg_dict = {}
4 msg_list = msg_str.split('/')[0:-1]
5 for msg in msg_list:
6 msg = msg.replace('@s', '/').replace('@A', '@')
7 msg_tmp = msg.split('@=')
8 msg_dict[msg_tmp[0]] = msg_tmp[1]
9 return msg_dict
10 except Exception as e:
11 print(str(e))
2.抓包分析
建议通过chrome开发者工具抓包，或者使用fiddler抓包，网页的东西，直接用chrome更方便
为什么不用斗鱼开放平台提供的api直接用呢，因为api是面向注册的开发者的，api都需要申请使用，普通用户只能抓包分析通用接口
分析：
wsproxy.douyu.com中交互消息可以获得多个弹幕服务器地址，我们直接取一个就行，不需要在程序中实现实时分析
然后分析danmuproxy.douyu.com连接中详细交互信息，实现与服务器交互
匿名登录时弹幕中礼物消息可能默认被屏蔽，需在登录时提交开启指令，或登录后提交开启指令
弹幕消息类型与指令非常丰富，这里举例简单的消息和指令，详细可以继续分析
结果如下：
登录：type@=loginreq/roomid@=74751/dfl@=/username@=visitor8243989/uid@=1132317461/ver@=20190610/aver@=218101901/ct@=0/
##匿名分配的username与uid可以从wsproxy.douyu.com中交互消息获取，也可直接自定义提交就行
退出登录：type@=logout/
心跳消息：type@=mrkl/
加入组消息：type@=joingroup/rid@=74751/gid@=-9999/ #gid默认1，此处改成 - 9999 改成海量弹幕模式
屏蔽礼物消息：type@=dmfbdreq/dfl@=sn@AA=105@ASss@AA=1@AS@Ssn@AA=106@ASss@AA=1@AS@Ssn@AA=107@ASss@AA=1@AS@Ssn@AA=108@ASss@AA=1@AS@Ssn@AA=110@ASss@AA=1@AS@Ssn@AA=901@ASss@AA=1@AS@S/
开启礼物消息：type@=dmfbdreq/dfl@=sn@AA=105@ASss@AA=0@AS@Ssn@AA=106@ASss@AA=0@AS@Ssn@AA=107@ASss@AA=0@AS@Ssn@AA=108@ASss@AA=0@AS@Ssn@AA=110@ASss@AA=0@AS@Ssn@AA=901@ASss@AA=0@AS@S/
##开启与屏蔽礼物可以详细控制，可以逐 python教程项尝试分析
注：登录消息中有个字段/dfl@=，此处直接加入屏蔽礼物或开启礼物指令中相应dfl@=后面的内容，即可在登录时控制礼物屏蔽或开启
3.礼物消息处理
获取斗鱼礼物类型，需抓包分析来源网址
url1 = 'https://webconf.douyucdn.cn/resource/common/gift/flash/gift_effect.json'
url2 = 'https://webconf.douyucdn.cn/resource/common/prop_gift_list/prop_gift_config.json'
将获取到的礼物json处理一下，合并且去除不需要信息，做成字典：
1 def get_gift_dict():
2 gift_json = {}
3 gift_json1 = requests.get('https://webconf.douyucdn.cn/resource/common/gift/flash/gift_effect.json').text
4 gift_json2 = requests.get('https://webconf.douyucdn.cn/resource/common/prop_gift_list/prop_gift_config.json').text
5 gift_json1=gift_json1.replace('DYConfigCallback(','')[0:-2]
6 gift_json2=gift_json2.replace('DYConfigCallback(','')[0:-2]
7 gift_json1 = json.loads(gift_json1)['data']['flashConfig']
8 gift_json2= json.loads(gift_json2)['data']
9 for gift in gift_json1:
10 gift_json[gift] = gift_json1[gift]['name']
11 for gift in gift_json2:
12 gift_json[gift] = gift_json2[gift]['name']
13 return gift_json
4.websocket连接
python环境先安装websocket包 pip3 install websocket-client
引入websocket包后，使用websecket.WebSocketApp建立websecket连接客户端，创建时在 on_open、on_error、on_message、on_close 4个参数中传入相应事件发生时需要处理的方法
顾名思义，4个参数很好理解了
websocket.WebSocketApp(url, on_open=on_open, on_error=on_error,on_message=on_message, on_close=on_close)
5.效果与源码
实际效果展示：
源码（演示代码，异常判断，数据校验就不做了）：
1 __author__ = 'admin'
2 import websocket
3 import threading
4 import time
5 import requests
6 import json
7
8
9 class DyDanmu:
10 def __init__(self, roomid, url):
11 self.gift_dict = self.get_gift_dict()
12 self.gift_dict_keys = self.gift_dict.keys()
13 self.room_id = roomid
14 self.client = websocket.WebSocketApp(url, on_open=self.on_open, on_error=self.on_error,
15 on_message=self.on_message, on_close=self.on_close)
16 self.heartbeat_thread = threading.Thread(target=self.heartbeat)
17
18 def start(self):
19 self.client.run_forever()
20
21 def stop(self):
22 self.logout()
23 self.client.close()
24
25 def on_open(self):
26 self.login()
27 self.join_group()
28 self.heartbeat_thread.setDaemon(True)
29 self.heartbeat_thread.start()
30
31
32 def on_error(self, error):
33 print(error)
34
35 def on_close(self):
36 print('close')
37
38 def send_msg(self, msg):
39 msg_bytes = self.msg_encode(msg)
40 self.client.send(msg_bytes)
41
42 def on_message(self, msg):
43 message = self.msg_decode(msg)
44 # print(message)
45 for msg_str in message:
46 msg_dict = self.msg_format(msg_str)
47 if msg_dict['type'] == 'chatmsg':
48 print(msg_dict['nn'] + ':' + msg_dict['txt'])
49 if msg_dict['type'] == 'dgb':
50 if msg_dict['gfid'] in self.gift_dict_keys:
51 print(msg_dict['nn'] + '\t送出\t' + msg_dict['gfcnt'] + '\t个\t' + self.gift_dict[msg_dict['gfid']])
52 else:
53 print(msg_dict['nn'] + '\t送出\t' + msg_dict['gfcnt'] + '\t个\t' + msg_dict['gfid'] + '\t未知礼物')
54 # print(msg_dict)
55
56 # 发送登录信息
57 def login(self):
58 login_msg = 'type@=loginreq/roomid@=%s/' \
59 'dfl@=sn@AA=105@ASss@AA=0@AS@Ssn@AA=106@ASss@AA=0@AS@Ssn@AA=107@ASss@AA=0@AS@Ssn@AA=108@ASss@AA=0@AS@Ssn@AA=110@ASss@AA=0@AS@Ssn@AA=901@ASss@AA=0/' \
60 'username@=%s/uid@=%s/ltkid@=/biz@=/stk@=/devid@=8d8c22ce6093e6a7264f99da00021501/ct@=0/pt@=2/cvr@=0/tvr@=7/apd@=/rt@=1605498503/vk@=0afb8a90c2cb545e8459d60c760dc08b/' \
61 'ver@=20190610/aver@=218101901/dmbt@=chrome/dmbv@=78/' % (
62 self.room_id, 'visitor4444086', '1178849206'
63 )
64 self.send_msg(login_msg)
65
66 def logout(self):
67 logout_msg = 'type@=logout/'
68 self.send_msg(logout_msg)
69
70 # 发送入组消息
71 def join_group(self):
72 join_group_msg = 'type@=joingroup/rid@=%s/gid@=-9999/' % (self.room_id)
73 self.send_msg(join_group_msg)
74
75 # 关闭礼物信息推送
76 def close_gift(self):
77 close_gift_msg = 'type@=dmfbdreq/dfl@=sn@AA=105@ASss@AA=1@AS@Ssn@AA=106@ASss@AA=1@AS@Ssn@AA=107@ASss@AA=1@AS@Ssn@AA=108@ASss@AA=1@AS@Ssn@AA=110@ASss@AA=1@AS@Ssn@AA=901@ASss@AA=1@AS@S/'
78 self.send_msg(close_gift_msg)
79
80 # 保持心跳线程
81 def heartbeat(self):
82 while True:
83 # 45秒发送一个心跳包
84 self.send_msg('type@=mrkl/')
85 print('发送心跳')
86 time.sleep(45)
87
88
89 def msg_encode(self, msg):
90 # 消息以 \0 结尾，并以utf-8编码
91 msg = msg + '\0'
92 msg_bytes = msg.encode('utf-8')
93 #消息长度 + 头部长度8
94 length_bytes = int.to_bytes(len(msg) + 8, 4, byteorder='little')
95 #斗鱼客户端发送消息类型 689
96 type = 689
97 type_bytes = int.to_bytes(type, 2, byteorder='little')
98 # 加密字段与保留字段，默认 0 长度各 1
99 end_bytes = int.to_bytes(0, 1, byteorder='little')
100 #按顺序相加 消息长度 + 消息长度 + 消息类型 + 加密字段 + 保留字段
101 head_bytes = length_bytes + length_bytes + type_bytes + end_bytes + end_bytes
102 #消息头部拼接消息内容
103 data = head_bytes + msg_bytes
104 return data
105
106 def msg_decode(self, msg_bytes):
107 # 定义一个游标位置
108 cursor = 0
109 msg = []
110 while cursor < len(msg_bytes):
111 #根据斗鱼协议，报文 前四位与第二个四位，都是消息长度，取前四位，转化成整型
112 content_length = int.from_bytes(msg_bytes[cursor: (cursor + 4) - 1], byteorder='little')
113 #报文长度不包含前4位，从第5位开始截取消息长度的字节流，并扣除前8位的协议头，取出正文，用utf-8编码成字符串
114 content = msg_bytes[(cursor + 4) + 8:(cursor + 4) + content_length - 1].decode(encoding='utf-8',
115 errors='ignore')
116 msg.append(content)
117 cursor = (cursor + 4) + content_length
118 # print(msg)
119 return msg
120
121 def msg_format(self, msg_str):
122 try:
123 msg_dict = {}
124 msg_list = msg_str.split('/')[0:-1]
125 for msg in msg_list:
126 msg = msg.replace('@s', '/').replace('@A', '@')
127 msg_tmp = msg.split('@=')
128 msg_dict[msg_tmp[0]] = msg_tmp[1]
129 return msg_dict
130 except Exception as e:
131 print(str(e))
132
133 def get_gift_dict(self):
134 gift_json = {}
135 gift_json1 = requests.get('https://webconf.douyucdn.cn/resource/common/gift/flash/gift_effect.json').text
136 gift_json2 = requests.get(
137 'https://webconf.douyucdn.cn/resource/common/prop_gift_list/prop_gift_config.json').text
138 gift_json1 = gift_json1.replace('DYConfigCallback(', '')[0:-2]
139 gift_json2 = gift_json2.replace('DYConfigCallback(', '')[0:-2]
140 gift_json1 = json.loads(gift_json1)['data']['flashConfig']
141 gift_json2 = json.loads(gift_json2)['data']
142 for gift in gift_json1:
143 gift_json[gift] = gift_json1[gift]['name']
144 for gift in gift_json2:
145 gift_json[gift] = gift_json2[gift]['name']
146 return gift_json
147
148
149 if __name__ == '__main__':
150 roomid = '74751'
151 url = 'wss://danmuproxy.douyu.com:8506/'
152 dy = DyDanmu(roomid, url)
153 dy.start()
