JsonSockketTcp通訊端 for qt(json資料流傳輸層)

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主要處理tcp的json資料流,解析和除錯json資料流,繼承與 qtcpsocket層,方便擴充

資料流格式:

#ifndef CONFIGTCPSOCKET_H#define CONFIGTCPSOCKET_H#include <QTcpSocket>#include <QJsonDocument>class JsonTcpSocket : public QTcpSocket{  Q_OBJECTpublic:  explicit JsonTcpSocket(QObject *parent = 0);  virtual ~JsonTcpSocket();  const QString &getLastError()const{return lastErrorString;}  const int &getLastCode()const{return lastErrorCode;}public slots:  bool write(const char *json);  bool write(const QJsonDocument &json);  bool write(const QByteArray &json);  bool write(const QString &json);  bool write(const QJsonObject &obj);signals:  void newJsonData(const QJsonDocument &doc);//新的json資料  void jsonError(const int &errorCode,const QString &errorString);//json格式錯誤  void socketError(const int &errorCode,const QString &errorString);//網路錯誤private slots:  void readBytes();//讀取位元組  void networkError(QAbstractSocket::SocketError error);//網路錯誤private:  int readByteCount=0;  QString lastErrorString; //最後的錯誤文字  int lastErrorCode;//錯誤碼};#endif // CONFIGTCPSOCKET_H

#include "jsontcpsocket.h"#include <QDataStream>#include "settingconfig.h"#include <QByteArray>#include <QThread>#include "commonfunction.h"JsonTcpSocket::JsonTcpSocket(QObject *parent) :  QTcpSocket(parent){  connect(this,&JsonTcpSocket::readyRead,this,&JsonTcpSocket::readBytes);  connect(this,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(networkError(QAbstractSocket::SocketError)));  this->setSocketOption(QAbstractSocket::LowDelayOption,"1"); //啟用nagle低延遲演算法  this->setSocketOption(QAbstractSocket::KeepAliveOption,"1"); //設定保持串連狀態}JsonTcpSocket::~JsonTcpSocket(){}void JsonTcpSocket::readBytes()//讀取位元組{  if(this->readByteCount==0)    {      char peek;      this->read(&peek,sizeof(peek));      if(peek==‘l‘)   //查看是否是資料包的起始位置        {          char len[READ_RAW_LEN];//讀取json資料的長度          this->read(len,sizeof(len));          ByteToInt(len,&this->readByteCount);        }else  //否則就丟棄全部的資料        {          this->readAll();          //qDebug()<<"read all data:"<<this->readAll();          return;        }    }  if(this->readByteCount>this->bytesAvailable())    return;  char *json=new char[this->readByteCount];  this->read(json,this->readByteCount);  //讀取json資料  this->readByteCount=0; //資料長度重設為0;  QJsonParseError parseError;  QJsonDocument jsonDoc(QJsonDocument::fromJson(json,&parseError));  if(parseError.error==QJsonParseError::NoError)  //json格式是否正確    {      // qDebug()<<"read json data:"<<jsonDoc.toJson();        emit newJsonData(jsonDoc); //發送json資料訊號    }  else    {        this->lastErrorCode=parseError.error;        this->lastErrorString=parseError.errorString();        emit jsonError(parseError.error,parseError.errorString()); //發送錯誤碼        qDebug()<<"json format error:"<<json;    }  delete []json;  this->readBytes(); //繼續讀取一下段資料}bool JsonTcpSocket::write(const char *json){  return this->write(QJsonDocument::fromJson(json));}bool JsonTcpSocket::write(const QByteArray &json){  return this->write(QJsonDocument::fromJson(json));}bool JsonTcpSocket::write(const QString &json){  return this->write(QJsonDocument::fromVariant(json));}bool JsonTcpSocket::write(const QJsonObject &obj){  return this->write(QJsonDocument(obj));}bool JsonTcpSocket::write(const QJsonDocument &json){  QByteArray array;  array.prepend(json.toJson(QJsonDocument::Compact));  int len=array.length();  char lenByte[READ_RAW_LEN];  IntToByte(len,lenByte);  array.prepend(lenByte,sizeof(lenByte));  array.prepend(‘l‘);  int bytes=-1;  bytes=QTcpSocket::write(array);  return bytes!=-1;}void JsonTcpSocket::networkError(QAbstractSocket::SocketError error)//網路錯誤{    this->lastErrorString=this->errorString();    this->lastErrorCode=error;    emit socketError(error,this->lastErrorString);}