Qt http

一、服务器端

 

 

 

二、客户端

1.Pro里添加

Qt += network

2.引入头文件

#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QHttpPart>
#include <QHttpMultiPart>

3.初始化

auto manager = new QNetworkAccessManager(this);
connect(manager, &QNetworkAccessManager::finished, this, &MainWidget::receiveReply);

4.接收槽函数

void MainWidget::receiveReply(QNetworkReply *reply)
{
    qDebug()<<"operation:"<<reply->operation();
    //路径
    qDebug()<<"url:"<<reply->url();
    //状态码
    const int status_code=reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
    qDebug()<<"status code:"<<status_code;

    if(status_code==0 && reply->errorString()=="Operation canceled"){
        qDebug()<<"timeout";
    }

    if(reply->error()!=QNetworkReply::NoError){
        //处理中的错误信息
        qDebug()<<"reply error:"<<reply->errorString();
    }else{
        //获取响应信息并展示到ui，这里没有解析
        const QByteArray reply_data=reply->readAll();
        qDebug()<<"read all:"<<reply_data;
    }
    reply->deleteLater();
}

5.get

//构建请求对象
QNetworkRequest request;
request.setUrl(QUrl(ui->editGetUrl->text()));
//设置请求头
//已知头类型参见文档QNetworkRequest::KnownHeaders
request.setHeader(QNetworkRequest::ContentTypeHeader,"application/json");
//自定义类型
request.setRawHeader("self-header","gongjianbo");

//发送请求
manager->get(request);

6.post

//构建请求对象
QNetworkRequest request;
request.setUrl(QUrl(ui->editPostUrl->text()));
//设置请求头
request.setHeader(QNetworkRequest::ContentTypeHeader,"application/json");
//发送请求
manager->post(request,ui->editPostData->toPlainText().toUtf8());

 参考：https://blog.csdn.net/gongjianbo1992/article/details/97568863