ftpreply.cpp Example File

webkit/webftpclient/ftpreply.cpp

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 ** This file is part of the examples of the Qt Toolkit.
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 #include <QTextDocument>
 #include <QtNetwork>
 #include "ftpreply.h"

 FtpReply::FtpReply(const QUrl &url)
     : QNetworkReply()
 {
     ftp = new QFtp(this);
     connect(ftp, SIGNAL(listInfo(QUrlInfo)), this, SLOT(processListInfo(QUrlInfo)));
     connect(ftp, SIGNAL(readyRead()), this, SLOT(processData()));
     connect(ftp, SIGNAL(commandFinished(int, bool)), this, SLOT(processCommand(int, bool)));

     offset = 0;
     units = QStringList() << tr("bytes") << tr("K") << tr("M") << tr("G")
                           << tr("Ti") << tr("Pi") << tr("Ei") << tr("Zi")
                           << tr("Yi");

     setUrl(url);
     ftp->connectToHost(url.host());
 }

 void FtpReply::processCommand(int, bool err)
 {
     if (err) {
         setError(ContentNotFoundError, tr("Unknown command"));
         emit error(ContentNotFoundError);
         return;
     }

     switch (ftp->currentCommand()) {
     case QFtp::ConnectToHost:
         ftp->login();
         break;

     case QFtp::Login:
         ftp->list(url().path());
         break;

     case QFtp::List:
         if (items.size() == 1)
             ftp->get(url().path());
         else
             setListContent();
         break;

     case QFtp::Get:
         setContent();

     default:
         ;
     }
 }

 void FtpReply::processListInfo(const QUrlInfo &urlInfo)
 {
     items.append(urlInfo);
 }

 void FtpReply::processData()
 {
     content += ftp->readAll();
 }

 void FtpReply::setContent()
 {
     open(ReadOnly | Unbuffered);
     setHeader(QNetworkRequest::ContentLengthHeader, QVariant(content.size()));
     emit readyRead();
     emit finished();
     ftp->close();
 }

 void FtpReply::setListContent()
 {
     QUrl u = url();
     if (!u.path().endsWith("/"))
         u.setPath(u.path() + "/");

     QString base_url = url().toString();
     QString base_path = u.path();

     open(ReadOnly | Unbuffered);
     QString content(
         "<html>\n"
         "<head>\n"
         "  <title>" + Qt::escape(base_url) + "</title>\n"
         "  <style type=\"text/css\">\n"
         "  th { background-color: #aaaaaa; color: black }\n"
         "  table { border: solid 1px #aaaaaa }\n"
         "  tr.odd { background-color: #dddddd; color: black\n }\n"
         "  tr.even { background-color: white; color: black\n }\n"
         "  </style>\n"
         "</head>\n\n"
         "<body>\n"
         "<h1>" + tr("Listing for %1").arg(base_path) + "</h1>\n\n"
         "<table align=\"center\" cellspacing=\"0\" width=\"90%\">\n"
         "<tr><th>Name</th><th>Size</th></tr>\n");

     QUrl parent = u.resolved(QUrl(".."));

     if (parent.isParentOf(u))

         content += QString("<tr><td><strong><a href=\"" + parent.toString() + "\">"
             + tr("Parent directory") + "</a></strong></td><td></td></tr>\n");

     int i = 0;
     foreach (const QUrlInfo &item, items) {

         QUrl child = u.resolved(QUrl(item.name()));

         if (i == 0)
             content += QString("<tr class=\"odd\">");
         else
             content += QString("<tr class=\"even\">");

         content += QString("<td><a href=\"" + child.toString() + "\">"
                            + Qt::escape(item.name()) + "</a></td>");

         qint64 size = item.size();
         int unit = 0;
         while (size) {
             qint64 new_size = size/1024;
             if (new_size && unit < units.size()) {
                 size = new_size;
                 unit += 1;
             } else
                 break;
         }

         if (item.isFile())
             content += QString("<td>" + QString::number(size) + " "
                                + units[unit] + "</td></tr>\n");
         else
             content += QString("<td></td></tr>\n");

         i = 1 - i;
     }

     content += QString("</table>\n"
                        "</body>\n"
                        "</html>\n");

     this->content = content.toUtf8();

     setHeader(QNetworkRequest::ContentTypeHeader, QVariant("text/html; charset=UTF-8"));
     setHeader(QNetworkRequest::ContentLengthHeader, QVariant(this->content.size()));
     emit readyRead();
     emit finished();
     ftp->close();
 }

 // QIODevice methods

 void FtpReply::abort()
 {
 }

 qint64 FtpReply::bytesAvailable() const
 {
     return content.size() - offset;
 }

 bool FtpReply::isSequential() const
 {
     return true;
 }

 qint64 FtpReply::readData(char *data, qint64 maxSize)
 {
     if (offset < content.size()) {
         qint64 number = qMin(maxSize, content.size() - offset);
         memcpy(data, content.constData() + offset, number);
         offset += number;
         return number;
     } else
         return -1;
 }

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