使用Qt实现FTP客户端

头文件ftp.h

#pragma once
#ifdef CREATEDELL_API_DU
#else
#define  CREATEDELL_API_DU  _declspec(dllexport)
#endif#ifndef FTPCLIENT_H#include <QtCore\QString>
#include <QtNetwork\QNetworkAccessManager>
#include <QtNetwork\QNetworkRequest>
#include <QtNetwork\QNetworkReply>
#include <QtCore\QUrl>
#include <QtCore\QFile>
#include <QtCore\QDir>
#include <QtCore\QDebug>
#include <QtCore\QObject>#include <memory>class CREATEDELL_API_DU FtpClient : public QObject
{Q_OBJECTpublic:explicit FtpClient(QObject *parent = 0);virtual ~FtpClient();void setUrl();void setDir(const QString& dirpath);void setFile(QString& filename);void setPort(int port = 21);void setPath(QString& path);void setHost(QString& ip);void setPassword(QString& password);void setUserName(QString& username);void setPercent(qint64 bytesSent, qint64 bytesTotal);QNetworkReply::NetworkError getErrorCode();void FtpClient::setErrorCode(QNetworkReply::NetworkError errors);
public slots:void upload();void download(int& errCode);void readContent();void replyFinished(QNetworkReply*);void loadError(QNetworkReply::NetworkError);void loadProgress(qint64 bytesSent, qint64 bytesTotal);public:virtual void onFinish() {}virtual qint64 getPersent() { return percent_; }private:QNetworkReply *reply_;std::shared_ptr<QFile> file_;std::shared_ptr<QUrl> url_;std::shared_ptr<QDir> dir_;std::shared_ptr<QNetworkAccessManager> accessManager_;qint64 percent_;QNetworkReply::NetworkError error_;
};#endif // FTPCLIENT_H

源文件ftp.cpp

#define CREATEDELL_API_DU _declspec(dllexport)#include "ftp.h"#include <iostream>
#include <QEventLoop>CREATEDELL_API_DU FtpClient::FtpClient(QObject *parent) :QObject(parent), percent_(0){url_ = std::make_shared<QUrl>();url_->setScheme("ftp");
}CREATEDELL_API_DU FtpClient::~FtpClient()
{}QNetworkReply::NetworkError FtpClient::getErrorCode()
{return this->error_;
}void FtpClient::setErrorCode(QNetworkReply::NetworkError errors)
{this->error_ = errors;
}void CREATEDELL_API_DU FtpClient::setDir(const QString& dirPath)
{dir_ = std::make_shared<QDir>(dirPath);if (!dir_->exists()){auto ok = dir_->mkdir(dirPath);if (!ok){qDebug() << "make dir " << dirPath << " failed..." << endl;}}
}
void CREATEDELL_API_DU FtpClient::setUrl()
{url_ = std::make_shared<QUrl>();url_->setScheme("ftp");
}void CREATEDELL_API_DU FtpClient::setFile(QString& fileName)
{file_ = std::make_shared<QFile>(dir_->absolutePath() + "/" + fileName);
}void CREATEDELL_API_DU FtpClient::setPort(int port)
{if (nullptr != url_){url_->setPort(port);}
}void CREATEDELL_API_DU  FtpClient::setPercent(qint64 sendBytes, qint64 totalBytes)
{double result = 100.0 * sendBytes / totalBytes;this->percent_ = (int)result;
}void CREATEDELL_API_DU FtpClient::setPassword(QString& password)
{if (nullptr != url_){url_->setPassword(password);}
}void CREATEDELL_API_DU FtpClient::setUserName(QString& userName)
{if (nullptr != url_){url_->setUserName(userName);}
}void CREATEDELL_API_DU FtpClient::setPath(QString& path)
{url_->setPath(path);
}void CREATEDELL_API_DU FtpClient::setHost(QString& ip)
{url_->setHost(ip);
}void CREATEDELL_API_DU FtpClient::upload()
{qDebug() << "upload file " << *file_ << " begin..." << endl;if (!file_->open(QIODevice::ReadOnly)){qDebug() << "open file " << *file_ << " failed..." << endl;}//创建一个QNetworkAccessManager实例，将accessManager指向它accessManager_ = std::make_shared<QNetworkAccessManager>(this);accessManager_->setNetworkAccessible(QNetworkAccessManager::Accessible);QNetworkRequest request(*url_);reply_ = accessManager_->put(request, file_.get());connect(accessManager_.get(), SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)),Qt::DirectConnection);connect(reply_, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(loadError(QNetworkReply::NetworkError)),Qt::DirectConnection);connect(reply_, SIGNAL(uploadProgress(qint64, qint64)), this, SLOT(loadProgress(qint64, qint64)),Qt::DirectConnection);
}void CREATEDELL_API_DU FtpClient::download(int& errCode)
{errCode = 0;qDebug() << "download file " << *file_ << " begin..." << endl;file_->open(QIODevice::WriteOnly);  accessManager_ = std::make_shared<QNetworkAccessManager>(this);accessManager_->setNetworkAccessible(QNetworkAccessManager::Accessible);QNetworkRequest request(*url_);reply_ = accessManager_->get(request);connect(reply_, QOverload<QNetworkReply::NetworkError>::of(&QNetworkReply::error),[=, &errCode](QNetworkReply::NetworkError code){file_->close();switch ((int)code){case QNetworkReply::ConnectionRefusedError:qDebug() << "ConnectionRefusedError";break;case QNetworkReply::HostNotFoundError:qDebug() << "HostNotFoundError";break;case QNetworkReply::TimeoutError:qDebug() << "TimeoutError";break;case QNetworkReply::AuthenticationRequiredError:{qDebug() << "AuthenticationRequiredError";errCode = code;break;}default:{errCode = code;break;}}});connect((QObject *)reply_, SIGNAL(readyRead()), this, SLOT(readContent()));connect((QObject*)(accessManager_.get()), SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)),Qt::DirectConnection);//connect(reply_, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(loadError(QNetworkReply::NetworkError)),Qt::DirectConnection);connect(reply_, SIGNAL(downloadProgress(qint64, qint64)), this, SLOT(loadProgress(qint64, qint64)),Qt::DirectConnection);QEventLoop eventloop;connect((QObject*)(accessManager_.get()), SIGNAL(finished(QNetworkReply*)), &eventloop, SLOT(quit()));eventloop.exec(QEventLoop::ExcludeUserInputEvents);
}void CREATEDELL_API_DU FtpClient::readContent()
{file_->write(reply_->readAll());
}void CREATEDELL_API_DU FtpClient::replyFinished(QNetworkReply* replys)
{if (reply_->error() == QNetworkReply::NoError){qDebug() << "end..." << endl;reply_->deleteLater();file_->flush();file_->close();//发送传输完成信号onFinish();}else{//QMessageBox::critical(NULL, tr("Error"), "Failed!!!");qDebug() << "Error Failed!!!" << endl;}
}void CREATEDELL_API_DU FtpClient::loadError(QNetworkReply::NetworkError)
{qDebug() << "Error: " << reply_->error();setErrorCode( reply_->error());
}void CREATEDELL_API_DU FtpClient::loadProgress(qint64 bytesSend, qint64 bytesTotal)
{setPercent(bytesSend, bytesTotal);qDebug() << "loaded" << bytesSend << "of" << bytesTotal << "  " << getPersent() << "%";
}

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