企业微信iPad协议：事件流逆向与轻量级网关实现

func DecodePush(bs []byte) (*Event, error) {
    if bs[0] != 0x1e { return nil, fmt.Errorf("magic mismatch") }
    cmd := binary.BigEndian.Uint32(bs[1:5])
    raw, _ := zlib.NewReader(bytes.NewReader(bs[5:]))
    var evt Event
    if err := proto.Unmarshal(raw, &evt); err != nil {
        return nil, err
    }
    return &evt, nil
}

local key = KEYS[1]
local val = ARGV[1]
if redis.call("EXISTS", key) == 1 then
    return 0
else
    redis.call("SETEX", key, 300, 1)
    return 1
end

#include <openssl/hmac.h>
std::string Sign(const std::string& body, const std::string& sk){
    unsigned char md[32];
    unsigned int len;
    HMAC(EVP_sha256(), sk.data(), sk.size(),
         reinterpret_cast<const unsigned char*>(body.data()), body.size(), md, &len);
    return std::string((char*)md, len);
}

std::string wxid = "wxid_bot555666";