基本完成webSocket服务器功能

ZLToolKit @ 789ede49

-Subproject commit 5445ceca186237173c99a717b1ab6a26fb2ea020
+Subproject commit 789ede4907f164fe788ad7b8533eddd49c10869d

src/Http/HttpSession.h

@@ -144,12 +144,24 @@ public:
     EchoWebSocketSession(const std::shared_ptr<ThreadPool> &pTh, const Socket::Ptr &pSock) : HttpSession(pTh,pSock){};
     virtual ~EchoWebSocketSession(){};
 protected:
-    void onWebSocketHeader(const WebSocketHeader &packet) override{
+    void onWebSocketDecodeHeader(const WebSocketHeader &packet) override{
         DebugL << packet._playload_len;
     };
-    void onWebSocketPlayload(const WebSocketHeader &packet,const uint8_t *ptr,uint64_t len,uint64_t recved) override {
+    void onWebSocketDecodePlayload(const WebSocketHeader &packet,const uint8_t *ptr,uint64_t len,uint64_t recved) override {
         DebugL << string((char *)ptr,len) << " " << recved;
+
+        //webSocket服务器不允许对数据进行掩码加密
+        bool mask_flag = _mask_flag;
+        _mask_flag = false;
+        WebSocketSplitter::encode((uint8_t *)ptr,len);
+        _mask_flag = true;
+
     };
+
+    void onWebSocketEncodeData(const uint8_t *ptr,uint64_t len) override{
+        send((char *)ptr,len);
+    };
+
 };
 
 } /* namespace Http */

src/Http/WebSocketSplitter.cpp

-//
+//
 // Created by xzl on 2018/9/21.
 //
 
 #include "WebSocketSplitter.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
 #include "Util/logger.h"
 #include "Util/util.h"
 using namespace ZL::Util;
@@ -84,7 +87,7 @@ begin_decode:
         _got_header = true;
         _mask_offset = 0;
         _playload_offset = 0;
-        onWebSocketHeader(*this);
+        onWebSocketDecodeHeader(*this);
     }
 
     uint64_t remain = len - (ptr - data);
@@ -121,5 +124,75 @@ void WebSocketSplitter::onPlayloadData(uint8_t *ptr, uint64_t len) {
         }
         _mask_offset = (_mask_offset + len) % 4;
     }
-    onWebSocketPlayload(*this,_mask_flag ? ptr - len : ptr,len,_playload_offset);
+    onWebSocketDecodePlayload(*this, _mask_flag ? ptr - len : ptr, len, _playload_offset);
+}
+
+void WebSocketSplitter::encode(uint8_t *data, uint64_t len) {
+    string ret;
+
+    uint8_t byte = _fin << 7 | ((_reserved & 0x07) << 4) | (_opcode & 0x0F) ;
+    ret.push_back(byte);
+
+    _mask_flag = (_mask_flag && _mask.size() >= 4);
+    byte = _mask_flag << 7;
+
+    _playload_len = len;
+    if(_playload_len < 126){
+        byte |= _playload_len;
+        ret.push_back(byte);
+    }else if(_playload_len <= 0xFFFF){
+        byte |= 126;
+        ret.push_back(byte);
+
+        uint16_t len = htons(_playload_len);
+        ret.append((char *)&len,2);
+    }else{
+        byte |= 127;
+        ret.push_back(byte);
+
+        uint32_t len_high = htonl(_playload_len >> 32) ;
+        uint32_t len_low = htonl(_playload_len & 0xFFFFFFFF);
+        ret.append((char *)&len_high,4);
+        ret.append((char *)&len_low,4);
+    }
+    if(_mask_flag){
+        ret.append((char *)_mask.data(),4);
+    }
+
+    onWebSocketEncodeData((uint8_t*)ret.data(),ret.size());
+
+    if(_mask_flag){
+        uint8_t *ptr = data;
+        for(int i = 0; i < len ; ++i,++ptr){
+            *(ptr) ^= _mask[i % 4];
+        }
+    }
+    onWebSocketEncodeData(data,len);
+
 }
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src/Http/WebSocketSplitter.h

-//
+//
 // Created by xzl on 2018/9/21.
 //
 
@@ -33,6 +33,9 @@ public:
         CONTROL_RSVF = 0xF
     } Type;
 public:
+    WebSocketHeader() : _mask(4){}
+    virtual ~WebSocketHeader(){}
+public:
     bool _fin;
     uint8_t _reserved;
     Type _opcode;
@@ -46,11 +49,44 @@ public:
     WebSocketSplitter(){}
     virtual ~WebSocketSplitter(){}
 
+    /**
+     * 输入数据以便解包webSocket数据以及处理粘包问题
+     * 可能触发onWebSocketDecodeHeader和onWebSocketDecodePlayload回调
+     * @param data 需要解包的数据，可能是不完整的包或多个包
+     * @param len 数据长度
+     */
     void decode(uint8_t *data,uint64_t len);
+
+    /**
+     * 编码一个数据包
+     * 将触发2次onWebSocketEncodeData回调
+     * 第一次是数据头，第二次是负载数据
+     * @param data 负载数据
+     * @param len 负载数据长度
+     */
     void encode(uint8_t *data,uint64_t len);
 protected:
-    virtual void onWebSocketHeader(const WebSocketHeader &packet) {};
-    virtual void onWebSocketPlayload(const WebSocketHeader &packet,const uint8_t *ptr,uint64_t len,uint64_t recved) {};
+    /**
+     * 收到一个webSocket数据包包头，后续将继续触发onWebSocketDecodePlayload回调
+     * @param packet 数据包头
+     */
+    virtual void onWebSocketDecodeHeader(const WebSocketHeader &packet) {};
+
+    /**
+     * 收到webSocket数据包负载
+     * @param packet 数据包包头
+     * @param ptr 负载数据指针
+     * @param len 负载数据长度
+     * @param recved 已接收数据长度，等于packet._playload_len时则接受完毕
+     */
+    virtual void onWebSocketDecodePlayload(const WebSocketHeader &packet, const uint8_t *ptr, uint64_t len, uint64_t recved) {};
+
+    /**
+     * websocket数据编码回调
+     * @param ptr 数据指针
+     * @param len 数据指针长度
+     */
+    virtual void onWebSocketEncodeData(const uint8_t *ptr,uint64_t len){};
 private:
     void onPlayloadData(uint8_t *data,uint64_t len);
 private: