某APP和服务端通信采用了自定义协议（非传统的HTTPS），具体做法是把HTTP协议包装进了自定义的应用层协议中。

#!pip install hpack===4.1.0
from hpack import Encoder, Decoder

# 定义自定义的静态表，注意：这里只是示例，实际条目请确保符合 HPACK 规范
custom_static_table = [
    (b":m-whale-time-out", b""),
]

class CustomHpackEncoder(Encoder):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        for (name, value) in custom_static_table:
            self.header_table.add(name, value)

class CustomHpackDecoder(Decoder):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        for (name, value) in custom_static_table:
            self.header_table.add(name, value)
        
# 要编码的 HTTP/2 头部列表（每个元素为 (name, value) 元组）
headers = [
    (b":method", b"GET"),
    (b":path", b"/"),
    (b":scheme", b"https"),
    (b":authority", b"example.com"),
    (b":m-swhale-time-out", b"")
]
original_size = 0
for item in headers:
    original_size += len(item[0]) + len(item[1])
print("Original size:", original_size)

# 对头部进行编码，返回的结果为 bytes 类型
encoder = CustomHpackEncoder()
encoded_headers = encoder.encode(headers)
print("Encoded headers:", encoded_headers)
print("Encoded size:", len(encoded_headers))
print()


# 对编码后的头部进行解码，返回的结果为解码后的头部列表
decoder = CustomHpackDecoder()
decoded_headers = decoder.decode(encoded_headers)
print("Decoded headers:", decoded_headers)
print(decoder.header_table)