函数名
//判断IP地址及端口是否在线
static bool ipLive(const QString &ip, int port, int timeout = 1000);
//获取网页所有源代码
static QString getHtml(const QString &url);
//获取本机公网IP地址
static QString getNetIP(const QString &webCode);
//获取本机IP
static QString getLocalIP();
//Url地址转为IP地址
static QString urlToIP(const QString &url);
//字符串补全
static QString getValue(quint8 value);
//判断是否通外网
static bool isWebOk();
函数体
bool QUIHelper::ipLive(const QString &ip, int port, int timeout)
{
//局部的事件循环,不卡主界面
QEventLoop eventLoop;
//设置超时
QTimer timer;
connect(&timer, SIGNAL(timeout()), &eventLoop, SLOT(quit()));
timer.setSingleShot(true);
timer.start(timeout);
QTcpSocket tcpSocket;
connect(&tcpSocket, SIGNAL(connected()), &eventLoop, SLOT(quit()));
tcpSocket.connectToHost(ip, port);
eventLoop.exec();
bool ok = (tcpSocket.state() == QAbstractSocket::ConnectedState);
return ok;
}
QString QUIHelper::getHtml(const QString &url)
{
QNetworkAccessManager *manager = new QNetworkAccessManager();
QNetworkReply *reply = manager->get(QNetworkRequest(QUrl(url)));
QByteArray responseData;
QEventLoop eventLoop;
QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), &eventLoop, SLOT(quit()));
eventLoop.exec();
responseData = reply->readAll();
return QString(responseData);
}
QString QUIHelper::getNetIP(const QString &webCode)
{
QString web = webCode;
web = web.replace(' ', "");
web = web.replace("\r", "");
web = web.replace("\n", "");
QStringList list = web.split("<br/>");
QString tar = list.at(3);
QStringList ip = tar.split("=");
return ip.at(1);
}
QString QUIHelper::getLocalIP()
{
QStringList ips;
QList<QHostAddress> addrs = QNetworkInterface::allAddresses();
foreach (QHostAddress addr, addrs) {
QString ip = addr.toString();
if (QUIHelper::isIP(ip)) {
ips << ip;
}
}
//优先取192开头的IP,如果获取不到IP则取127.0.0.1
QString ip = "127.0.0.1";
foreach (QString str, ips) {
if (str.startsWith("192.168.1") || str.startsWith("192")) {
ip = str;
break;
}
}
return ip;
}
QString QUIHelper::urlToIP(const QString &url)
{
QHostInfo host = QHostInfo::fromName(url);
return host.addresses().at(0).toString();
}
QString QUIHelper::getValue(quint8 value)
{
QString result = QString::number(value);
if (result.length() <= 1) {
result = QString("0%1").arg(result);
}
return result;
}
bool QUIHelper::isWebOk()
{
//能接通百度IP说明可以通外网
return ipLive("115.239.211.112", 80);
}