我目前QHttpMultiPart在 Qt 项目中使用，但它似乎有一些问题？
我已经按照示例提出了以下代码：
#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;
}
遗憾的是，没有一个 SLOTS 是由 SIGNALS 触发的。我也看不到在本地以太网适配器上使用wireshark 发送的包。但是，我的 Apache 确实收到了一个请求：
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，我得到以下结果：
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 操作，然后执行print_r($_POST)一个简单的 1。
我不知道该怎么做。我在互联网上到处寻找，似乎无法弄清楚。我遵循了官方纪录片中的所有示例和描述，并在 SO 上找到了几个线程。QHttpMultiPart 类似乎有一个错误，尽管它已在 5.0.0 的主要更新中得到修复。
tl;博士：
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 显示为 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 以及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，那就太好了。
非常感谢！我很感激任何帮助！