Qt使用ftp

Qt使用ftp

参考：

下载：

    QUrl mUrl;mUrl.setScheme("ftp");  //不设置这个的话，会报QNetworkReply::ContentAccessDeniedmUrl.setUserName("myName");mUrl.setPassword("12345");mUrl.setUrl("ftp://127.0.0.");qDebug() << mUrl;QNetworkRequest request(mUrl);auto reply = (request);connect(reply, &QNetworkReply::finished, [=](void){qDebug() << QString::fromUtf8(reply->readAll());});connect(reply, qOverload<QNetworkReply::NetworkError>(&QNetworkReply::error) , [=](QNetworkReply::NetworkError error){qDebug() << reply->error();});

上传：

    QString ftpPath = "ftp://127.0.0.1";QString filePath;filePath = &#";QFile *file = new QFile(filePath);file->open(QIODevice::ReadOnly);QByteArray byte_file = file->readAll();QString fileName;fileName = &#";QString m_ftpPath;m_ftpPath = ftpPath + "/" + fileName;// 把选中的文件上传到服务器QUrl mUrl(m_ftpPath);mUrl.setScheme("ftp"); //不设置这个的话，会报QNetworkReply::ContentAccessDeniedmUrl.setUserName("myName");mUrl.setPassword("12345");mUrl.setUrl(m_ftpPath);QNetworkRequest request(mUrl);auto reply = mNetMan.put(request, byte_file);connect(reply, &QNetworkReply::finished, [=](void){qDebug() << QString::fromUtf8(reply->readAll());});connect(reply, qOverload<QNetworkReply::NetworkError>(&QNetworkReply::error) , [=](QNetworkReply::NetworkError error){qDebug() << reply->error();});

上面这种上传方式，是先把文件读取到内存中，然后再上传到ftp服务器。假如你本机内存4g，你要上传个8g的文件，估计会出问题。因此可以优化一下，变这样子。

QString ftpPath = "ftp://127.0.0.1";QString filePath;filePath = &#";QFile *file = new QFile(filePath);file->open(QIODevice::ReadOnly);QString fileName;fileName = &#";QString m_ftpPath;m_ftpPath = ftpPath + "/" + fileName;// 把选中的文件上传到服务器QUrl mUrl(m_ftpPath);mUrl.setScheme("ftp"); //不设置这个的话，会报QNetworkReply::ContentAccessDeniedmUrl.setUserName("myName");mUrl.setPassword("12345");mUrl.setUrl(m_ftpPath);QNetworkRequest request(mUrl);auto reply = mNetMan.put(request, file); //就是这个，传递进来的不是具体的数据，而是文件的指针。connect(reply, &QNetworkReply::finished, [=](void){qDebug() << QString::fromUtf8(reply->readAll());});connect(reply, qOverload<QNetworkReply::NetworkError>(&QNetworkReply::error) , [=](QNetworkReply::NetworkError error){qDebug() << reply->error();});