QHttpMultiPart发送帖子请求结果为“1”

时间：2013-09-21 03:19:38

标签： c++ qt post network-programming

我目前在Qt项目中使用QHttpMultiPart，但似乎在我的结尾有些问题？

我已经按照这个例子提出了以下代码：

#include "uploader.h"

#include <QFileInfo>
#include <QMimeDatabase>
#include <QHttpMultiPart>
#include <QNetworkReply>

#include <QDebug>
/**
 * @brief Uploader::Uploader
 * @param parent
 */
Uploader::Uploader(QObject *parent) :
    QObject(parent)
{
    uploadInProgress = false;
}

/**
 * @brief Uploader::upload
 * @param absoluteFilePath
 */
void Uploader::upload(QString absoluteFilePath)
{
    qDebug() << "Upload Starting";
    QFileInfo fileInfo(absoluteFilePath);

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

    //action part
    QHttpPart textPart;
    textPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"cmd\""));
    textPart.setBody(QString("wFile").toLatin1());

    //File Path
    QHttpPart filePathPart;
    filePathPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file_path\""));
    filePathPart.setBody(absoluteFilePath.toLatin1());

    //filepart
    QHttpPart filePart;
    QMimeDatabase db;
    QMimeType mime = db.mimeTypeForFile(absoluteFilePath);
    filePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant(mime.name()));
    filePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_file\"; filename=\""+ fileInfo.baseName() + "\""));

    QFile *file = new QFile(absoluteFilePath);
    if ( !file->exists() )
    {
        qDebug() << "File Does not exist";
    }

    file->open(QIODevice::ReadOnly);
    filePart.setBodyDevice(file);
    file->setParent(multiPart); // we cannot delete the file now, so delete it with the multiPart

    multiPart->append(textPart);
    multiPart->append(filePathPart);
    multiPart->append(filePart);

    QUrl url("http://project.dbz.dev/index.php?controller=wapi&action=handle");
    QNetworkRequest request(url);


    pManager = new QNetworkAccessManager();

    pReply = pManager->post(request, multiPart);
    multiPart->setParent(pReply);

    connect(pReply, SIGNAL(uploadProgress(qint64,qint64)),this,SLOT(uploadProgress(qint64,qint64)));
    connect(pReply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onError(QNetworkReply::NetworkError)));
    connect(pReply, SIGNAL(finished()),this, SLOT(uploadFinished()));

    // here connect signals etc.
    uploadInProgress = true;
}

/**
 * @brief Uploader::uploadFinished
 */
void Uploader::uploadFinished()
{
    QString data = (QString) pReply->readAll();
    qDebug() << data;
    qDebug() << "Upload finished";

    uploadInProgress = false;
    if ( pReply->error() > 0 )
    {
        qDebug() << "Error occured: " << pReply->error() << " : " << pReply->errorString();
    }
    else
    {
        qDebug() << "Upload success";
    }
    delete pReply;
}

void Uploader::uploadProgress(qint64 a, qint64 b)
{
    qDebug() << " SOME PROGRESS!";
    qDebug() << a  << "/" << b;
}

void Uploader::onError(QNetworkReply::NetworkError err)
{
    qDebug() << " SOME ERROR!";
    qDebug() << err;
}

可悲的是，没有一个SLOTS是从SIGNALS触发的。我也不能在本地以太网适配器上看到使用wireshark发送的包。 但是，我的Apache确实收到了请求：

192.168.178.21 - - [21/Sep/2013:05:10:41 +0200] "POST /index.php?controller=wapi&action=handle HTTP/1.1" 200 166 "-" "Mozilla/5.0"

在我的PHP应用程序中，我有以下结果：

Application_Controller_WapiController::handleAction: Command: wFile
Application_Controller_WapiController::wFile: POST Request: 1

这基本上意味着，它识别参数“cmd”和值“wFile”，打开相应的PHP动作，然后执行print_r($_POST)，它只显示简单的1。

我不知道该怎么做。我在互联网上无处不在，似乎无法弄明白。我按照官方纪录片上的所有例子和描述，在SO上找到了几个主题。 QHttpMultiPart类似乎有一个错误，虽然它已经修复了主要的5.0.0更新。

TL; DR：

connect(pReply, SIGNAL(uploadProgress(qint64,qint64)),this,SLOT(uploadProgress(qint64,qint64)));
    connect(pReply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onError(QNetworkReply::NetworkError)));
    connect(pReply, SIGNAL(finished()),this, SLOT(uploadFinished()));

这些信号没有被触发，PHP print_r显示1，我无法在我的机器上跟踪POST请求。

如果有人能告诉我为什么不发出SIGNALS会更好，更重要的是如何在发送之前在我的C ++应用程序中看到我的POST请求的最终版本。

非常感谢！我感谢任何帮助！

1 个答案:

答案 0 :(得分：2)

我通过添加：

解决了这个问题 
pELoop = new QEventLoop();
pELoop->exec();

结果如下：     #include“uploader.h”

#include <QFileInfo>
#include <QMimeDatabase>
#include <QHttpMultiPart>
#include <QNetworkReply>

#include <QDebug>
/**
 * @brief Uploader::Uploader
 * @param parent
 */
Uploader::Uploader(QObject *parent) :
    QObject(parent)
{
    uploadInProgress = false;
}

/**
 * @brief Uploader::upload
 * @param absoluteFilePath
 */
void Uploader::upload(QString absoluteFilePath)
{
    qDebug() << "Upload Starting";
    QFileInfo fileInfo(absoluteFilePath);

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

    //action part
    QHttpPart textPart;
    textPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"cmd\""));
    textPart.setBody(QString("wFile").toLatin1());

    //File Path
    QHttpPart filePathPart;
    filePathPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file_path\""));
    filePathPart.setBody(absoluteFilePath.toLatin1());

    //filepart
    QHttpPart filePart;
    QMimeDatabase db;
    QMimeType mime = db.mimeTypeForFile(absoluteFilePath);
    filePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant(mime.name()));
    filePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_file\"; filename=\""+ fileInfo.baseName() + "\""));

    QFile *file = new QFile(absoluteFilePath);
    if ( !file->exists() )
    {
        qDebug() << "File Does not exist";
    }

    file->open(QIODevice::ReadOnly);
    filePart.setBodyDevice(file);
    file->setParent(multiPart); // we cannot delete the file now, so delete it with the multiPart

    multiPart->append(textPart);
    multiPart->append(filePathPart);
    multiPart->append(filePart);

    QUrl url("http://encryptor.dbz.dev/index.php?controller=wapi&action=handle");
    QNetworkRequest request(url);


    pManager = new QNetworkAccessManager();

    pReply = pManager->post(request, multiPart);
    multiPart->setParent(pReply);

    pELoop = new QEventLoop();
    connect(pReply, SIGNAL(uploadProgress(qint64,qint64)),this,SLOT(uploadProgress(qint64,qint64)));
    connect(pReply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onError(QNetworkReply::NetworkError)));
    connect(pReply, SIGNAL(finished()),this, SLOT(uploadFinished()));

    pELoop->exec();
    // here connect signals etc.
    uploadInProgress = true;
}

/**
 * @brief Uploader::uploadFinished
 */
void Uploader::uploadFinished()
{
    QString data = (QString) pReply->readAll();
    qDebug() << data;
    qDebug() << "Upload finished";

    uploadInProgress = false;
    if ( pReply->error() > 0 )
    {
        qDebug() << "Error occured: " << pReply->error() << " : " << pReply->errorString();
    }
    else
    {
        qDebug() << "Upload success";
    }
    pReply->deleteLater();
    pELoop->exit();
}

void Uploader::uploadProgress(qint64 a, qint64 b)
{
    qDebug() << " SOME PROGRESS!";
    qDebug() << a  << "/" << b;
}

void Uploader::onError(QNetworkReply::NetworkError err)
{
    qDebug() << " SOME ERROR!";
    qDebug() << err;
}

请求按预期执行，信号也正常工作。 我得到了输出：

Upload Starting 
 SOME PROGRESS! 
16384 / 483753 
 SOME PROGRESS! 
483753 / 483753 
 SOME PROGRESS! 
0 / 0 
"Array
(
    [controller] => wapi
    [action] => handle
    [cmd] => wFile
    [file_path] => D:/Downloads/putty.exe
)
{"cmd":"","status":"","message":"","params":[]}" 
Upload finished 
Upload success

我离开时听到有人在寻找一个有效的例子。

相关问题
最新问题