标签:device span header keyword win7 插入数据 第一个 nbsp veh
本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.
环境:
主机:WIN7
开发环境:Qt5 3.1.2
说明:
在tcp上传输xml消息.
协议格式如下:
2字节标识(0xc55c,网络序)+2字节预留 +4字节报文内容长度(网络序) + 4字节命令字(网络序)+报文内容
部分协议:
命令字:
请求值班信息:GET_DUTY_INFO
请求报文:
- <?xml version="1.0" encoding="UTF-8"?>
- <request >
- <identifier>客户端的唯一标识符</identifier>
- </request>
回复报文:
- <?xml version="1.0" encoding="UTF-8"?>
- <dutyinfo>
- <version>版本号</version>//表示车辆值班记录有无变化(如增减)
- <vehiclenum>车辆数目</vehiclenum>
- <vehicle>
- <dutyofvehicleuid>32位UUID</dutyofvehicleuid>
- <number>车辆编号, 如1,2,3,4</ number>
- <platenumber>车牌号</platenumber>
- <image>图片url</image>
- <liquidlevel>78</liquidlevel>//0至100
- </vehicle>
- <vehicle>
- <dutyofvehicleuid>32位UUID</dutyofvehicleuid>
- <number>车辆编号, 如1,2,3,4</ number>
- <platenumber>车牌号</platenumber>
- <image>图片url</image>
- <liquidlevel>78</liquidlevel>//0至100
- </vehicle>
- …
- </dutyinfo>
处理思路:
1.发送:
调用qt中处理xml文件的类将所需要发送的信息保存为xml文件,然后读取文件,将文件转化为字节流,并拼接帧头,然后发送
2.接收
将接收的字节流去掉帧头后保存为xml文件,然后调用qt中处理xml文件的类读取其中的信息
源代码:
保存为xml文件
- QFile file(FILE_GET_DUTY_TX);
-
- QDomDocument doc;
- QDomElement root_elem;
- QDomElement item;
- QDomText text;
-
-
- QString header("version=\"1.0\" encoding=\"UTF-8\"");
- doc.appendChild(doc.createProcessingInstruction("xml",header));
-
-
- root_elem = doc.createElement("request");
- doc.appendChild(root_elem);
-
-
- item = doc.createElement("identifier");
- text = doc.createTextNode(QString(Local_Id));
- item.appendChild(text);
- root_elem.appendChild(item);
-
-
- file.open(QIODevice::WriteOnly);
- QTextStream out(&file);
- out.setCodec("UTF-8");
- doc.save(out,4,QDomNode::EncodingFromTextStream);
- file.close();
读取xml文件,得到字节流
- file.open(QIODevice::ReadOnly);
- QTextStream get(&file);
-
- Data_Xml_Tx = get.readAll().toLocal8Bit();
- file.close();
发送函数
-
- void Net::slot_net_tx_frame(int cmd,QByteArray frame)
- {
- QByteArray head;
- int i = 0;
-
- i = 0;
-
- head[i++] = 0xc5;
- head[i++] = 0x5c;
-
- head[i++] = 0;
- head[i++] = 0;
-
- head[i++] = frame.size() >> 24;
- head[i++] = frame.size() >> 16;
- head[i++] = frame.size() >> 8;
- head[i++] = frame.size();
-
- head[i++] = cmd >> 24;
- head[i++] = cmd >> 16;
- head[i++] = cmd >> 8;
- head[i++] = cmd;
-
- frame.prepend(head);
-
-
- if (tcp_client->state() == QAbstractSocket::ConnectedState)
- {
-
-
- tcp_client->write(frame);
-
- #ifdef DEBUG
- qDebug() << "发送网络帧1:cmd" << cmd;
- #endif
- }
- else
- {
-
- Frame = frame;
-
- if (tcp_client->state() != QAbstractSocket::ConnectingState)
- {
- tcp_client->connectToHost(Server_Ip,Server_Port);
- }
- }
- }
tcp接收网络帧,并保存为xml文件,然后读取xml文件中的信息
-
- void Get_Duty::deal_frame()
- {
- int sum = 0;
- int i = 0;
- QSqlQuery q;
- QString version;
-
-
- Lock_Net = 0;
-
- Net_Permission = 0;
-
- qDebug() << "接收帧:回复值班信息";
-
-
- if ((uint8_t)Frame.at(11) == 0)
- {
-
-
- QFile file(FILE_GET_DUTY_RX);
-
- file.open(QIODevice::WriteOnly);
- QTextStream out(&file);
- out.setCodec("UTF-8");
- out << Frame.mid(LEN_FRAME_HEAD);
- file.close();
-
-
- QDomDocument doc(FILE_GET_DUTY_RX);
-
- file.open(QIODevice::ReadOnly);
- doc.setContent(&file);
- file.close();
-
-
- QDomElement root_node = doc.documentElement();
-
- QDomNode node = root_node.firstChild();
- version = node.toElement().text();
-
- if (version == Version)
- {
- return;
- }
-
-
- Version = version;
- qDebug() << "版本号" << Version;
-
-
- node = node.nextSibling();
- sum = node.toElement().text().toInt();
- qDebug() << "车辆总数" << sum;
-
-
- Car_Three_List[0].clear();
- Car_Three_List[1].clear();
- Car_Three_List[2].clear();
-
- q.prepare("DELETE FROM duty");
- q.exec();
-
- for (i = 0;i < sum;i++)
- {
- node = node.nextSibling();
-
-
- q.prepare("INSERT INTO duty VALUES(?,?,?,?,?,?)");
-
- q.bindValue(0,node.toElement().childNodes().at(0).toElement().text());
-
- q.bindValue(1,node.toElement().childNodes().at(1).toElement().text().toInt());
-
- q.bindValue(2,node.toElement().childNodes().at(2).toElement().text());
-
- q.bindValue(3,node.toElement().childNodes().at(3).toElement().text());
-
- q.bindValue(4,node.toElement().childNodes().at(4).toElement().text().toInt());
-
- q.bindValue(5,IMG_NULL);
- q.exec();
-
-
- if (i < 3)
- {
- Car_Three_List[i] = node.toElement().childNodes().at(0).toElement().text();
- }
- }
-
-
- }
- else
- {
- Version = "null";
-
-
- q.prepare("DELETE FROM duty");
- q.exec();
- }
-
-
- emit sig_recv_duty_info();
-
-
- Frame.clear();
- Len_Frame_Content = 0;
- }
http://blog.csdn.net/jdh99/article/details/38677811
qt中用tcp传输xml消息 good
标签:device span header keyword win7 插入数据 第一个 nbsp veh
原文地址:http://www.cnblogs.com/findumars/p/6152880.html