(资料图片仅供参考)

基本概念

这里要明确一点，HTTP/HTTPS是应用层协议，而socket一般指TCP/UDP协议，也就是在传输层中，而IP协议是在网络层中！

这个实例主要是撸socket，然后手动构造HTTP包，完成应用层的功能。

这里使用了C++中的Qt框架

代码与实例

程序运行截图如下：

源码如下：

#include #include #include #include #include int main(int argc, char *argv[]){QCoreApplication a(argc, argv);QSslSocket *socket = new QSslSocket;socket->connectToHostEncrypted(\"www.baidu.com\", 443);QEventLoop loop;QObject::connect(socket, SIGNAL(encrypted()), &loop, SLOT(quit()));loop.exec();QObject::connect(socket, &QSslSocket::stateChanged, [=](){qDebug() << \"ssl socket断了，这个网站有毒！快跑！\";});socket->write(\"GET https://www.baidu.com/ HTTP/1.1\r
\"\"Host: www.baidu.com\r
\"\"User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0\r
\"\"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r
\"\"Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3\r
\"\"Accept-Encoding: deflate, br\r
\"\"Cookie: BAIDUID=AFAC3106555A50E243924D01EB575871:FG=1; BIDUPSID=0770F8E70DCC708B09D0A4EB13FA4EA9; PSTM=1566473759; BD_UPN=13314352; COOKIE_SESSION=7_1_5_1_2_3_0_1_4_1_0_3_2196_0_89_0_1566912600_1566910408_1566912511%7C9%231980_13_1566912293%7C6; delPer=0; BD_HOME=0; H_PS_PSSID=1461_21120_29523_29518_29099_29567_29221_29072\r
\"\"Connection: keep-alive\r
\"\"Upgrade-Insecure-Requests: 1\r
\"\"\r
\");QObject::connect(socket, SIGNAL(readyRead()), &loop, SLOT(quit()));loop.exec();qDebug() << QString::fromUtf8(socket->readAll());delete socket;qDebug() << \"over!\";return a.exec();}

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