QT：Http Post

#include "widget.h"

#include "ui_widget.h"

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    ui->label->setScaledContents(true);

    m_url="https://api-cn.faceplusplus.com/facepp/v3/detect";

    m_apiKey="7kfC4-FHzEAIAJAebnnZT3YDSLfr7tiv";

//    m_apiKey="api_key=ISAO-PCspYGHS8C36AwY6WVj_5dhmf2W";

    m_apiSecret="dWiiaWo2-n05KeAaCRPxsvjRvyZAVSrK";

//    m_apiSecret="api_secret=hG0PG2R0BjCQ_RwJasQp73rYgvFA2Y6N";

    m_filePath="./1.jpg";

    m_requestStr1="return_landmark=1";

    m_requestStr1Ps="return_attributes=gender,age";

}

Widget::~Widget()

{

    delete ui;

}

void Widget::on_pushButton_clicked()

{

    ui->textBrowser->clear();

    ui->label->setPixmap(QPixmap(m_filePath));

    QFile file(m_filePath);

    file.open(QIODevice::ReadOnly);

    int file_len = file.size();

    QDataStream in(&file);

    char *m_buf = new char[file_len];

    in.readRawData(m_buf, file_len);

    file.close();

    QByteArray arr = QByteArray(m_buf, file_len);

    QNetworkAccessManager* pManager = new QNetworkAccessManager(this);

    QNetworkRequest request;

    // 发送https请求前准备工作;

//    QSslConfiguration config;

    QSslConfiguration conf = QSslConfiguration::defaultConfiguration();

    conf.setPeerVerifyMode(QSslSocket::VerifyNone);

    conf.setProtocol(QSsl::TlsV1SslV3);

    request.setSslConfiguration(conf);

    request.setUrl(QUrl(m_url));

    QByteArray boundaryStr=getBoundary();

    request.setRawHeader("Content-Type", "multipart/form-data; boundary="+boundaryStr);

//同上request.setHeader(QNetworkRequest::ContentTypeHeader,"multipart/form-data; boundary="+boundaryStr);//同样可行

//    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded;charset=utf-8");

//    request.setRawHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0");

//    request.setRawHeader("Connection","keep-alive");

//    request.setRawHeader("Host","api-cn.faceplusplus.com");

    //方式一：QHttpMultiPart

    QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

    multiPart->setBoundary(boundaryStr);

    QHttpPart key;

//    key.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("text/plain"));

    key.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"api_key\""));

    key.setBody("ISAO-PCspYGHS8C36AwY6WVj_5dhmf2W");

    QHttpPart secret;

    secret.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"api_secret\""));

    secret.setBody("hG0PG2R0BjCQ_RwJasQp73rYgvFA2Y6N");

    QHttpPart imagePart;

    imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"image_base64\""));

    imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream")/*QVariant("image/jpeg")*/);

    imagePart.setBody(arr.toBase64());

    imagePart.setBodyDevice(0);

    QHttpPart landmark;

    landmark.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"return_landmark\""));

    landmark.setBody("1");

    QHttpPart landmarktips;

    landmarktips.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"return_attributes\""));

    landmarktips.setBody("gender,age");

    multiPart->append(key);

    multiPart->append(secret);

    multiPart->append(imagePart);

    multiPart->append(landmark);

    multiPart->append(landmarktips);

    //方式二：拼串

    QByteArray array;

//    array.append("Content-Type:multipart/form-data; boundary="+boundaryStr/*分割串*/);

    array.append("--"+boundaryStr+"\r\n");

    array.append("Content-Disposition: form-data; name=\"api_key\"\r\n\r\n");

    array.append("ISAO-PCspYGHS8C36AwY6WVj_5dhmf2W\r\n");

    array.append("--"+boundaryStr+"\r\n");

    array.append("Content-Disposition: form-data; name=\"api_secret\"\r\n\r\n");

    array.append("hG0PG2R0BjCQ_RwJasQp73rYgvFA2Y6N\r\n");

    array.append("--"+boundaryStr+"\r\n");

    array.append("Content-Disposition: form-data; name=\"image_base64\"\r\nContent-Type:application/octet-stream\r\n\r\n");

//同上array.append("Content-Disposition: form-data; name=\"image_url\"\r\n\r\nhttps://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=581947021,421537588&fm=27&gp=0.jpg\r\n");

    array.append(arr.toBase64()+"\r\n");

    array.append("--"+boundaryStr+"\r\n");

    array.append("Content-Disposition: form-data; name=\"return_landmark\"\r\n\r\n1\r\n");

    array.append("--"+boundaryStr+"\r\n");

    array.append("Content-Disposition: form-data; name=\"return_attributes\"\r\n\r\nemotion\r\n");

    array.append("--"+boundaryStr+"--\r\n\r\n");//"--"important tail

//    qDebug()<<array;

    QNetworkReply *pReply = pManager->post(request,array/*multiPart*/);

    connect(pReply , SIGNAL(finished()) , this , SLOT(onFinished()));

    connect(pReply , SIGNAL(error(QNetworkReply::NetworkError)) , this , SLOT(onError(QNetworkReply::NetworkError)));

}

// 请求完成;

void Widget::onFinished()

{

    qDebug()<<"successd";

    QNetworkReply *pReplay = qobject_cast<QNetworkReply*>(sender());

    // 保存接受的数据;

    QByteArray replyContent = pReplay->readAll();

    ui->textBrowser->append(QString(replyContent));

    pReplay->deleteLater();

}

// 请求失败;

void Widget::onError(QNetworkReply::NetworkError errorCode)

{

    QNetworkReply *pReplay = qobject_cast<QNetworkReply*>(sender());

    // 输出错误码及错误信息;

    qDebug()<< errorCode;

    qDebug()<< pReplay->errorString();

    ui->textBrowser->append(pReplay->errorString());

    pReplay->deleteLater();

}

QByteArray Widget::getBoundary(){

    QByteArray sb;

    QByteArray tmp("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-");

    for(int i = 0; i < 32; ++i) {

        sb.append(tmp.at(qrand()%tmp.count()));

    }

//    sb.append("\r\n");

//    int nnn=QDateTime::currentDateTime().toTime_t()*1000;

//    QString n=QString::number(nnn,16);

    qDebug()<<sb;

    qDebug()<<sb.size();

    return sb;

}