mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-12-02 08:13:02 +08:00
149 lines
4.2 KiB
C++
149 lines
4.2 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_WEBSOCKETSPLITTER_H
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#define ZLMEDIAKIT_WEBSOCKETSPLITTER_H
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#include <cstdint>
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#include <string>
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#include <vector>
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#include <memory>
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#include "Network/Buffer.h"
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//websocket组合包最大不得超过4MB(防止内存爆炸)
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#define MAX_WS_PACKET (4 * 1024 * 1024)
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namespace mediakit {
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class WebSocketHeader {
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public:
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using Ptr = std::shared_ptr<WebSocketHeader>;
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typedef enum {
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CONTINUATION = 0x0,
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TEXT = 0x1,
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BINARY = 0x2,
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RSV3 = 0x3,
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RSV4 = 0x4,
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RSV5 = 0x5,
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RSV6 = 0x6,
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RSV7 = 0x7,
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CLOSE = 0x8,
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PING = 0x9,
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PONG = 0xA,
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CONTROL_RSVB = 0xB,
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CONTROL_RSVC = 0xC,
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CONTROL_RSVD = 0xD,
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CONTROL_RSVE = 0xE,
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CONTROL_RSVF = 0xF
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} Type;
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public:
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WebSocketHeader() : _mask(4){
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//获取_mask内部buffer的内存地址，该内存是malloc开辟的，地址为随机
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uint64_t ptr = (uint64_t)(&_mask[0]);
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//根据内存地址设置掩码随机数
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_mask.assign((uint8_t*)(&ptr), (uint8_t*)(&ptr) + 4);
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}
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virtual ~WebSocketHeader(){}
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public:
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bool _fin;
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uint8_t _reserved;
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Type _opcode;
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bool _mask_flag;
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size_t _payload_len;
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std::vector<uint8_t > _mask;
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};
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//websocket协议收到的字符串类型缓存，用户协议层获取该数据传输的方式
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class WebSocketBuffer : public toolkit::BufferString {
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public:
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using Ptr = std::shared_ptr<WebSocketBuffer>;
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template<typename ...ARGS>
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WebSocketBuffer(WebSocketHeader::Type headType, bool fin, ARGS &&...args)
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: toolkit::BufferString(std::forward<ARGS>(args)...), _fin(fin), _head_type(headType){}
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~WebSocketBuffer() override {}
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WebSocketHeader::Type headType() const { return _head_type; }
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bool isFinished() const { return _fin; };
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private:
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bool _fin;
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WebSocketHeader::Type _head_type;
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};
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class WebSocketSplitter : public WebSocketHeader{
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public:
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WebSocketSplitter(){}
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virtual ~WebSocketSplitter(){}
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/**
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* 输入数据以便解包webSocket数据以及处理粘包问题
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* 可能触发onWebSocketDecodeHeader和onWebSocketDecodePayload回调
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* @param data 需要解包的数据，可能是不完整的包或多个包
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* @param len 数据长度
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*/
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void decode(uint8_t *data, size_t len);
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/**
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* 编码一个数据包
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* 将触发2次onWebSocketEncodeData回调
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* @param header 数据头
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* @param buffer 负载数据
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*/
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void encode(const WebSocketHeader &header,const toolkit::Buffer::Ptr &buffer);
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protected:
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/**
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* 收到一个webSocket数据包包头，后续将继续触发onWebSocketDecodePayload回调
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* @param header 数据包头
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*/
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virtual void onWebSocketDecodeHeader(const WebSocketHeader &header) {};
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/**
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* 收到webSocket数据包负载
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* @param header 数据包包头
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* @param ptr 负载数据指针
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* @param len 负载数据长度
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* @param recved 已接收数据长度(包含本次数据长度)，等于header._payload_len时则接受完毕
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*/
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virtual void onWebSocketDecodePayload(const WebSocketHeader &header, const uint8_t *ptr, size_t len, size_t recved) {};
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/**
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* 接收到完整的一个webSocket数据包后回调
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* @param header 数据包包头
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*/
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virtual void onWebSocketDecodeComplete(const WebSocketHeader &header) {};
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/**
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* websocket数据编码回调
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* @param ptr 数据指针
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* @param len 数据指针长度
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*/
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virtual void onWebSocketEncodeData(toolkit::Buffer::Ptr buffer){};
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private:
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void onPayloadData(uint8_t *data, size_t len);
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private:
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bool _got_header = false;
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int _mask_offset = 0;
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size_t _payload_offset = 0;
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std::string _remain_data;
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};
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} /* namespace mediakit */
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#endif //ZLMEDIAKIT_WEBSOCKETSPLITTER_H
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