Qt实践|HTTPS知识点-SSL socket获取百度首页

目录

 

基本概念

代码与实例

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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\n"
                  "Host: www.baidu.com\r\n"
                  "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0\r\n"
                  "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
                  "Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3\r\n"
                  "Accept-Encoding: deflate, br\r\n"
                  "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\n"
                  "Connection: keep-alive\r\n"
                  "Upgrade-Insecure-Requests: 1\r\n"
                  "\r\n");

    QObject::connect(socket, SIGNAL(readyRead()), &loop, SLOT(quit()));
    loop.exec();

    qDebug() << QString::fromUtf8(socket->readAll());

    delete socket;

    qDebug() << "over!";

    return a.exec();
}

这里要注意HTTP中的Accept-Encoding头中不要加gzip，不然收到的包是被压缩的，还要用压缩软件解压。