Table of contents
1. Obtain user file list information analysis
3. Get the number of files from the server
4. Get the file information list from the server
1. Obtain user file list information analysis
1. Set QListWidget to icon mode
2. When we click " Ascending order by download volume ", " Descending order by download volume ", the " Update " menu option will call the getFileCount interface to obtain the number of files . If the number of files is greater than 0, getFileList will be used to obtain the information of all files.
3. Save all the obtained file information to QList<FileInfo*> m_fileInfoList ; ( FileInfo is a custom file structure)
3. Call the refreshFileList interface to display all file information in m_fileInfoList on the QWidgetList window in the form of icons . ( Icon contains image and file name )
//设置菜单选项的槽函数
connect(m_downloadAscAction,&QAction::triggered,this,[=]{
// qDebug()<<"按下载量降序";
getFileCount(Desc);
});
connect(m_downloadDescAction,&QAction::triggered,this,[=]{
// qDebug()<<"按下载量升序";
getFileCount(Asc);
});
connect(m_refreshAction,&QAction::triggered,this,[=]{
getFileCount(Normal);
qDebug()<<"更新";
});
getFileCount(MyFileDisplay cmd);//获取文件的数量
getFileList(MyFileDisplay cmd);//获取用户的文件信息列表
refreshFileList();//显示图标2.Set icon properties
//设置图标模式
ui->listWidget->setViewMode(QListView::IconMode);
//设置在图标的图片的大小
ui->listWidget->setIconSize(QSize(80,80));
//设置图标的 布局的大小
ui->listWidget->setGridSize(QSize(120,200));
//自适应布局，需要将窗口进行布局才能生效
ui->listWidget->setResizeMode(QListView::Adjust);
//设置图标拖动状态，QListView::Static表示不可以拖动
ui->listWidget->setMovement(QListView::Static);3. Get the number of files from the server
The client will first call getFileCount to send an http request to obtain the user's file number from the server . The http request is as follows:
POST http://119.23.41.13:80/myfiles?cmd=count HTTP/1.1
Content-Type: application/json
{
"token": "7e4b94f141b8bc7680fac2fa7dcdddf3",
"user": "zhangsan"
}
HTTP response returned by the server:
HTTP/1.1 200 OK
{
"num": "7", //文件的数量
"code": "110" //获取失败为 111
}Request process:
Code:
//Normal正常显示，Asc 按下载量升序显示，Desc按下载量降序显示
enum MyFileDisplay { Normal, Asc, Desc};
//获取文件的数量
void myfile::getFileCount(MyFileDisplay cmd)
{
/*
1.设置http请求并发送http请求
2.获取响应的正文数据，并解析"code"，和"num"
3.如果code为"110"，"num"不为0，则调用getFileList获取文件信息列表
*/
//封装http请求
QNetworkRequest request;
//从配置文件中获取到ip地址和port端口号
QString ip=Common::getInstant()->getConfValue("web_server","ip");
QString port=Common::getInstant()->getConfValue("web_server","port");
QString url = QString("http://%1:%2/myfiles?cmd=count").arg(ip).arg(port);
request.setUrl(QUrl(url));
//设置文件类型
request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json"));
//将data数据以QJson的格式发送给服务器
QJsonObject object;
object.insert("user", m_logininfo->user());
object.insert("token", m_logininfo->token());
QJsonDocument doc(object);
QByteArray data=doc.toJson();
//发送请求
// qDebug()<<data;
QNetworkReply* rely=m_manager->post(request,data);
connect(rely,&QNetworkReply::readyRead,this,[=]{
//响应到达,读取所有的数据
QByteArray s=rely->readAll();
qDebug() << "服务器返回数据:" << QString(s);
//将s数据转换为Json对象
QJsonParseError err;
QJsonDocument document=QJsonDocument::fromJson(s,&err);
if(err.error!=QJsonParseError::NoError){
qDebug()<<"QJson格式错误";
return;
}
//将QJson字符串转换为QJson对象
QJsonObject object1;
object1=document.object();
//获取状态码
QString value1=object1["code"].toString();
if(value1=="110"){
//获取列表成功,获取文件列表
myfileCount=object1["num"].toString().toInt();
if(myfileCount>0){
//文件列表数量大于0
getFileList(cmd);//请求文件列表
}
}
if(value1=="111"){
//获取失败
qDebug()<<"获取文件失败";
}
});
}
4. Get the file information list from the server
When the number of files is greater than 0, the getFileList interface will be called to send an http request to the server to request the user's file information list. The http request is as follows:
POST http://119.23.41.13:80/myfiles?cmd=normal HTTP/1.1
Content-Type: application/json
Content-Length: 108
{
"count": 7, //请求的文件数量
"start": 0, //从哪个文件信息开始获取
"token": "7e4b94f141b8bc7680fac2fa7dcdddf3",
"user": "zhangsan"
}
The response sent back by the server:
HTTP/1.1 200 OK
{
"files": [{
"user": "zhangsan",
"md5": "b6bb728a0016b6327a6b549ea1f719d1",
"create_time": "2023-07-27 20:55:15",
"file_name": "test1.json",
"share_status": 1,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTCaTOAdjiBAAABBfJuwvA57.json",
"size": 261,
"type": "json"
}, {
"user": "zhangsan",
"md5": "05aee6833498afae803c103488838616",
"create_time": "2023-07-28 01:27:56",
"file_name": "2023包装印刷工艺实验_ 综合性实验1.doc",
"share_status": 1,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTCafaAGABwAAm0Qrbrn4w371.doc",
"size": 638464,
"type": "doc"
}, {
"user": "zhangsan",
"md5": "e9f32a97b8bde8cdbda5c2481dc77e6f",
"create_time": "2023-07-28 04:45:31",
"file_name": "沈家鹏+202022210218+包装工艺实验报告.doc",
"share_status": 1,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTC12uAQEQVAFojXojlUxs887.doc",
"size": 5929984,
"type": "doc"
}, {
"user": "zhangsan",
"md5": "0a4194984ac702483c500d7e216ef655",
"create_time": "2023-07-28 18:36:42",
"file_name": "沈家鹏+202022210218+包装工艺实验.pdf",
"share_status": 0,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTDmjqAfVaIAAtEPBMxG-A084.pdf",
"size": 742876,
"type": "pdf"
}, {
"user": "zhangsan",
"md5": "697bed673b8061471b3d04144fa4050e",
"create_time": "2023-07-28 18:36:51",
"file_name": "沈家鹏+202022210218+包装机械工厂参观实验报告.doc",
"share_status": 0,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTDmkOAN2_EADNSzTgsyJg890.doc",
"size": 3376128,
"type": "doc"
}, {
"user": "zhangsan",
"md5": "2a96c1401c1409dd24f8cc6996462a1e",
"create_time": "2023-07-28 18:36:52",
"file_name": "沈家鹏+202022210218+综合实验1.doc",
"share_status": 0,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTDmkSANiWXAACtJYuY4UE605.doc",
"size": 44544,
"type": "doc"
}, {
"user": "zhangsan",
"md5": "6f9e42afb2db2f92e7ba53b4c58d45b1",
"create_time": "2023-07-28 18:36:52",
"file_name": "沈家鹏+202022210218+综合性实验2.doc",
"share_status": 0,
"pv": 0,
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGTDmkSAXQw4AAFJKPLgCM4027.doc",
"size": 84480,
"type": "doc"
}]
}
The file information list Json package is a Json object . It only contains a key-value structure, where key is "files" and Value is a Json array. The array contains multiple Json objects. Each Json object contains information about each file, including:
"user": "sjp", //文件的上传的用户
"md5": "8274425de767b30b2fff1124ab54abb5", //用来唯一标识文件
"create_time": "2023-07-18 18:13:43", //上传时间
"file_name": "111.rtf", //文件名
"share_status": 0, //分享状态
"pv": 1, //下载量
"url": "http://172.31.39.20:80/group1/M00/00/00/rB8nFGS2ZdeAHmamAAAAB8uzquY970.rtf",
"size": 7, //文件大小
"type": "rtf" //文件类型Code:
struct FileInfo
{
QString user; //用户名
QString md5; //md5
QString createTime; //上传时间
QString fileName; //文件名称
int shareStatus; //共享状态, 0为没有共享， 1为共享
int pv; //文件下载量，下载一次加1
QString url; //文件url
int size; //文件大小
QString type; //文件类型
};
QList<FileInfo*> m_fileInfoList;//存储着所有的文件列表的信息
//获取文件信息列表
void myfile::getFileList(MyFileDisplay cmd)
{
/*
1.发送http请求获取文件信息列表
2.获取成功，需要先清除QListWidget中的item和 m_fileInfoList
3.将新的文件信息列表添加到m_fileInfoList 和QListWidget中。
*/
QString strCmd;
if (cmd == MyFileDisplay::Normal) {
strCmd = "normal";
} else if (cmd == MyFileDisplay::Asc) {
strCmd = "pvasc";
} else if (cmd == MyFileDisplay::Desc) {
strCmd = "pvdesc";
}
//封装http请求
QNetworkRequest request;
//从配置文件中获取到ip地址和port端口号
QString ip=Common::getInstant()->getConfValue("web_server","ip");
QString port=Common::getInstant()->getConfValue("web_server","port");
//http://192.168.52.139/myfiles?cmd=normal
//http://192.168.52.139/myfiles?cmd=asc
//http://192.168.52.139/myfiles?cmd=pvasc
QString url = QString("http://%1:%2/myfiles?cmd=%3").arg(ip).arg(port).arg(strCmd);
request.setUrl(QUrl(url));
//设置数据类型
request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json"));
//将data数据以QJson的格式发送给服务器
QJsonObject object;
object.insert("user", m_logininfo->user());
object.insert("token", m_logininfo->token());
object.insert("start", 0);
object.insert("count", myfileCount);
QJsonDocument doc(object);
QByteArray data=doc.toJson();
//发送请求
QNetworkReply* rely=m_manager->post(request,data);
connect(rely,&QNetworkReply::readyRead,this,[=]{
//响应到达,读取所有的数据
QByteArray s=rely->readAll();
clearFileList();//清空文件列表
clearFileItem();//
//将文件列表信息解析到m_fileInfoList中
AnalyJsonData::getFileList(s,m_fileInfoList);
refreshFileList();
rely->deleteLater();
});
}
//AnalyJsonData::getFileList(s,m_fileInfoList)接口
//是将响应正文的数据解析到m_fileInfoList中
4.Show icon
After obtaining all the file information, you need to display the files in m_fileInfoList on the QListWidget in the form of icons .
//显示文件列表到QListWidget
void myfile::refreshFileList()
{
/*
1.获取每一个文件信息
2.根据文件类型显示不同的图标
3.将QListWidgetItem添加到QWidget中
*/
for(int i=0;i<m_fileInfoList.count();i++)
{
FileInfo* info= m_fileInfoList[i];
//将图标设置进QListWidget中
QIcon icon(":/res/txt.png");
if(info->type=="jpg"||info->type=="png")
{
icon.addFile(":/res/jpg.png");
}else if(info->type=="pdf")
{
icon.addFile(":/res/pdf.png");
}
QListWidgetItem* item1=new QListWidgetItem(icon,info->fileName);
item1->setTextAlignment(Qt::AlignLeft);
ui->listWidget->addItem(item1);
}
//最后在添加一个上传文件的item到QListWidgetItem
QIcon icon(":/res/111111.png");
QListWidgetItem* item1=new QListWidgetItem(icon,"上传文件");
ui->listWidget->addItem(item1);
}