Chris@208: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@208: 
Chris@208: /*
Chris@208:     Sonic Visualiser
Chris@208:     An audio file viewer and annotation editor.
Chris@208:     Centre for Digital Music, Queen Mary, University of London.
Chris@208:     This file copyright 2007 QMUL.
Chris@208:     
Chris@208:     This program is free software; you can redistribute it and/or
Chris@208:     modify it under the terms of the GNU General Public License as
Chris@208:     published by the Free Software Foundation; either version 2 of the
Chris@208:     License, or (at your option) any later version.  See the file
Chris@208:     COPYING included with this distribution for more information.
Chris@208: */
Chris@208: 
Chris@208: #include "RemoteFile.h"
Chris@208: #include "base/TempDirectory.h"
Chris@208: #include "base/Exceptions.h"
Chris@208: 
Chris@208: #include <QHttp>
Chris@208: #include <QFtp>
Chris@208: #include <QFileInfo>
Chris@208: #include <QDir>
Chris@208: #include <QApplication>
Chris@208: #include <QProgressDialog>
Chris@210: #include <QHttpResponseHeader>
Chris@208: 
Chris@208: #include <iostream>
Chris@208: 
Chris@208: int
Chris@208: RemoteFile::m_count = 0;
Chris@208: 
Chris@208: QMutex
Chris@208: RemoteFile::m_fileCreationMutex;
Chris@208: 
Chris@304: RemoteFile::RemoteRefCountMap
Chris@304: RemoteFile::m_refCountMap;
Chris@304: 
Chris@304: RemoteFile::RemoteLocalMap
Chris@304: RemoteFile::m_remoteLocalMap;
Chris@304: 
Chris@304: QMutex
Chris@304: RemoteFile::m_mapMutex;
Chris@304: 
Chris@316: RemoteFile::RemoteFile(QString fileOrUrl, bool showProgress) :
Chris@316:     m_url(fileOrUrl),
Chris@316:     m_ftp(0),
Chris@316:     m_http(0),
Chris@316:     m_localFile(0),
Chris@316:     m_ok(false),
Chris@316:     m_lastStatus(0),
Chris@316:     m_remote(isRemote(fileOrUrl)),
Chris@316:     m_done(false),
Chris@316:     m_leaveLocalFile(false),
Chris@316:     m_progressDialog(0),
Chris@316:     m_progressShowTimer(this),
Chris@316:     m_refCounted(false)
Chris@316: {
Chris@316:     std::cerr << "RemoteFile::RemoteFile(" << fileOrUrl.toStdString() << ")" << std::endl;
Chris@316: 
Chris@316:     if (!canHandleScheme(m_url)) {
Chris@316:         std::cerr << "RemoteFile::RemoteFile: ERROR: Unsupported scheme in URL \"" << m_url.toString().toStdString() << "\"" << std::endl;
Chris@316:         m_errorString = tr("Unsupported scheme in URL");
Chris@316:         return;
Chris@316:     }
Chris@316: 
Chris@316:     init(showProgress);
Chris@316: 
Chris@316:     if (isRemote() &&
Chris@316:         (fileOrUrl.contains('%') ||
Chris@316:          fileOrUrl.contains("--"))) { // for IDNA
Chris@316: 
Chris@316:         waitForStatus();
Chris@316: 
Chris@316:         if (!isAvailable()) {
Chris@316:             // The URL was created on the assumption that the string
Chris@316:             // was human-readable.  Let's try again, this time
Chris@316:             // assuming it was already encoded.
Chris@316:             std::cerr << "RemoteFile::RemoteFile: Failed to retrieve URL \""
Chris@316:                       << fileOrUrl.toStdString() 
Chris@316:                       << "\" as human-readable URL; "
Chris@316:                       << "trying again treating it as encoded URL"
Chris@316:                       << std::endl;
Chris@316:             m_url.setEncodedUrl(fileOrUrl.toAscii());
Chris@316:             init(showProgress);
Chris@316:         }
Chris@316:     }
Chris@316: }
Chris@316: 
Chris@316: RemoteFile::RemoteFile(QUrl url, bool showProgress) :
Chris@304:     m_url(url),
Chris@208:     m_ftp(0),
Chris@208:     m_http(0),
Chris@208:     m_localFile(0),
Chris@208:     m_ok(false),
Chris@210:     m_lastStatus(0),
Chris@316:     m_remote(isRemote(url.toString())),
Chris@208:     m_done(false),
Chris@316:     m_leaveLocalFile(false),
Chris@210:     m_progressDialog(0),
Chris@304:     m_progressShowTimer(this),
Chris@316:     m_refCounted(false)
Chris@208: {
Chris@316:     std::cerr << "RemoteFile::RemoteFile(" << url.toString().toStdString() << ") [as url]" << std::endl;
Chris@316: 
Chris@316:     if (!canHandleScheme(m_url)) {
Chris@316:         std::cerr << "RemoteFile::RemoteFile: ERROR: Unsupported scheme in URL \"" << m_url.toString().toStdString() << "\"" << std::endl;
Chris@316:         m_errorString = tr("Unsupported scheme in URL");
Chris@208:         return;
Chris@208:     }
Chris@208: 
Chris@316:     init(showProgress);
Chris@316: }
Chris@304: 
Chris@316: RemoteFile::RemoteFile(const RemoteFile &rf) :
Chris@316:     QObject(),
Chris@316:     m_url(rf.m_url),
Chris@316:     m_ftp(0),
Chris@316:     m_http(0),
Chris@316:     m_localFile(0),
Chris@316:     m_ok(rf.m_ok),
Chris@316:     m_lastStatus(rf.m_lastStatus),
Chris@316:     m_remote(rf.m_remote),
Chris@316:     m_done(false),
Chris@316:     m_leaveLocalFile(false),
Chris@316:     m_progressDialog(0),
Chris@316:     m_progressShowTimer(0),
Chris@316:     m_refCounted(false)
Chris@316: {
Chris@316:     std::cerr << "RemoteFile::RemoteFile(" << m_url.toString().toStdString() << ") [copy ctor]" << std::endl;
Chris@304: 
Chris@316:     if (!canHandleScheme(m_url)) {
Chris@316:         std::cerr << "RemoteFile::RemoteFile: ERROR: Unsupported scheme in URL \"" << m_url.toString().toStdString() << "\"" << std::endl;
Chris@316:         m_errorString = tr("Unsupported scheme in URL");
Chris@304:         return;
Chris@304:     }
Chris@304: 
Chris@316:     if (!isRemote()) {
Chris@316:         m_localFilename = rf.m_localFilename;
Chris@316:     } else {
Chris@316:         QMutexLocker locker(&m_mapMutex);
Chris@316:         std::cerr << "RemoteFile::RemoteFile(copy ctor): ref count is "
Chris@316:                   << m_refCountMap[m_url] << std::endl;
Chris@316:         if (m_refCountMap[m_url] > 0) {
Chris@316:             m_refCountMap[m_url]++;
Chris@316:             std::cerr << "raised it to " << m_refCountMap[m_url] << std::endl;
Chris@316:             m_localFilename = m_remoteLocalMap[m_url];
Chris@316:             m_refCounted = true;
Chris@316:         } else {
Chris@316:             m_ok = false;
Chris@316:             m_lastStatus = 404;
Chris@316:         }
Chris@316:     }
Chris@316: 
Chris@316:     m_done = true;
Chris@316: }
Chris@316: 
Chris@316: RemoteFile::~RemoteFile()
Chris@316: {
Chris@316:     std::cerr << "RemoteFile(" << m_url.toString().toStdString() << ")::~RemoteFile" << std::endl;
Chris@316: 
Chris@316:     cleanup();
Chris@316: 
Chris@316:     if (isRemote() && !m_leaveLocalFile) deleteCacheFile();
Chris@316: }
Chris@316: 
Chris@316: void
Chris@316: RemoteFile::init(bool showProgress)
Chris@316: {
Chris@316:     if (!isRemote()) {
Chris@316:         m_localFilename = m_url.toLocalFile();
Chris@316:         m_ok = true;
Chris@316:         if (!QFileInfo(m_localFilename).exists()) {
Chris@316:             m_lastStatus = 404;
Chris@316:         } else {
Chris@316:             m_lastStatus = 200;
Chris@316:         }
Chris@316:         m_done = true;
Chris@316:         return;
Chris@316:     }
Chris@316: 
Chris@316:     if (createCacheFile()) {
Chris@316:         std::cerr << "RemoteFile::init: Already have this one" << std::endl;
Chris@316:         m_ok = true;
Chris@316:         if (!QFileInfo(m_localFilename).exists()) {
Chris@316:             m_lastStatus = 404;
Chris@316:         } else {
Chris@316:             m_lastStatus = 200;
Chris@316:         }
Chris@316:         m_done = true;
Chris@316:         return;
Chris@316:     }
Chris@316: 
Chris@208:     if (m_localFilename == "") return;
Chris@208:     m_localFile = new QFile(m_localFilename);
Chris@208:     m_localFile->open(QFile::WriteOnly);
Chris@208: 
Chris@316:     QString scheme = m_url.scheme().toLower();
Chris@316: 
Chris@316:     std::cerr << "RemoteFile::init: Don't have local copy of \""
Chris@316:               << m_url.toString().toStdString() << "\", retrieving" << std::endl;
Chris@208: 
Chris@208:     if (scheme == "http") {
Chris@316:         initHttp();
Chris@208:     } else if (scheme == "ftp") {
Chris@316:         initFtp();
Chris@316:     } else {
Chris@316:         m_remote = false;
Chris@316:         m_ok = false;
Chris@208:     }
Chris@208: 
Chris@208:     if (m_ok) {
Chris@316:         
Chris@316:         QMutexLocker locker(&m_mapMutex);
Chris@316: 
Chris@316:         if (m_refCountMap[m_url] > 0) {
Chris@316:             // someone else has been doing the same thing at the same time,
Chris@316:             // but has got there first
Chris@316:             cleanup();
Chris@316:             m_refCountMap[m_url]++;
Chris@316:             std::cerr << "RemoteFile::init: Another RemoteFile has got there first, abandoning our download and using theirs" << std::endl;
Chris@316:             m_localFilename = m_remoteLocalMap[m_url];
Chris@316:             m_refCounted = true;
Chris@316:             m_ok = true;
Chris@316:             if (!QFileInfo(m_localFilename).exists()) {
Chris@316:                 m_lastStatus = 404;
Chris@316:             }
Chris@316:             m_done = true;
Chris@316:             return;
Chris@316:         }
Chris@304: 
Chris@304:         m_remoteLocalMap[m_url] = m_localFilename;
Chris@304:         m_refCountMap[m_url]++;
Chris@316:         m_refCounted = true;
Chris@304: 
Chris@316:         if (showProgress) {
Chris@316:             m_progressDialog = new QProgressDialog(tr("Downloading %1...").arg(m_url.toString()), tr("Cancel"), 0, 100);
Chris@316:             m_progressDialog->hide();
Chris@316:             connect(&m_progressShowTimer, SIGNAL(timeout()),
Chris@316:                     this, SLOT(showProgressDialog()));
Chris@316:             connect(m_progressDialog, SIGNAL(canceled()), this, SLOT(cancelled()));
Chris@316:             m_progressShowTimer.setSingleShot(true);
Chris@316:             m_progressShowTimer.start(2000);
Chris@316:         }
Chris@208:     }
Chris@208: }
Chris@208: 
Chris@316: void
Chris@316: RemoteFile::initHttp()
Chris@208: {
Chris@316:     m_ok = true;
Chris@316:     m_http = new QHttp(m_url.host(), m_url.port(80));
Chris@316:     connect(m_http, SIGNAL(done(bool)), this, SLOT(done(bool)));
Chris@316:     connect(m_http, SIGNAL(dataReadProgress(int, int)),
Chris@316:             this, SLOT(dataReadProgress(int, int)));
Chris@316:     connect(m_http, SIGNAL(responseHeaderReceived(const QHttpResponseHeader &)),
Chris@316:             this, SLOT(httpResponseHeaderReceived(const QHttpResponseHeader &)));
Chris@316: 
Chris@316:     // I don't quite understand this.  url.path() returns a path
Chris@316:     // without percent encoding; for example, spaces appear as
Chris@316:     // literal spaces.  This generally won't work if sent to the
Chris@316:     // server directly.  You can retrieve a correctly encoded URL
Chris@316:     // from QUrl using url.toEncoded(), but that gives you the
Chris@316:     // whole URL; there doesn't seem to be any way to retrieve
Chris@316:     // only an encoded path.  Furthermore there doesn't seem to be
Chris@316:     // any way to convert a retrieved path into an encoded path
Chris@316:     // without explicitly specifying that you don't want the path
Chris@316:     // separators ("/") to be encoded.  (Besides being painful to
Chris@316:     // manage, I don't see how this can work correctly in any case
Chris@316:     // where a percent-encoded "/" is supposed to appear within a
Chris@316:     // path element?)  There also seems to be no way to retrieve
Chris@316:     // the path plus query string, i.e. everything that I need to
Chris@316:     // send to the HTTP server.  And no way for QHttp to take a
Chris@316:     // QUrl argument.  I'm obviously missing something.
Chris@316: 
Chris@316:     // So, two ways to do this: query the bits from the URL,
Chris@316:     // encode them individually, and glue them back together
Chris@316:     // again...
Chris@316: /*
Chris@316:     QString path = QUrl::toPercentEncoding(m_url.path(), "/");
Chris@316:     QList<QPair<QString, QString> > query = m_url.queryItems();
Chris@316:     if (!query.empty()) {
Chris@316:         QStringList q2;
Chris@316:         for (QList<QPair<QString, QString> >::iterator i = query.begin();
Chris@316:              i != query.end(); ++i) {
Chris@316:             q2.push_back(QString("%1=%3")
Chris@316:                          .arg(QString(QUrl::toPercentEncoding(i->first)))
Chris@316:                          .arg(QString(QUrl::toPercentEncoding(i->second))));
Chris@316:         }
Chris@316:         path = QString("%1%2%3")
Chris@316:             .arg(path).arg("?")
Chris@316:             .arg(q2.join("&"));
Chris@316:     }
Chris@316: */
Chris@316: 
Chris@316:     // ...or, much simpler but relying on knowledge about the
Chris@316:     // scheme://host/path/path/query etc format of the URL, we can
Chris@316:     // get the whole URL ready-encoded and then split it on "/" as
Chris@316:     // appropriate...
Chris@316:         
Chris@316:     QString path = "/" + QString(m_url.toEncoded()).section('/', 3);
Chris@316: 
Chris@316:     std::cerr << "RemoteFile: path is \""
Chris@316:               << path.toStdString() << "\"" << std::endl;
Chris@316:         
Chris@316:     m_http->get(path, m_localFile);
Chris@316: }
Chris@316: 
Chris@316: void
Chris@316: RemoteFile::initFtp()
Chris@316: {
Chris@316:     m_ok = true;
Chris@316:     m_ftp = new QFtp;
Chris@316:     connect(m_ftp, SIGNAL(done(bool)), this, SLOT(done(bool)));
Chris@316:     connect(m_ftp, SIGNAL(commandFinished(int, bool)),
Chris@316:             this, SLOT(ftpCommandFinished(int, bool)));
Chris@316:     connect(m_ftp, SIGNAL(dataTransferProgress(qint64, qint64)),
Chris@316:             this, SLOT(dataTransferProgress(qint64, qint64)));
Chris@316:     m_ftp->connectToHost(m_url.host(), m_url.port(21));
Chris@316:     
Chris@316:     QString username = m_url.userName();
Chris@316:     if (username == "") {
Chris@316:         username = "anonymous";
Chris@316:     }
Chris@316:     
Chris@316:     QString password = m_url.password();
Chris@316:     if (password == "") {
Chris@316:         password = QString("%1@%2").arg(getenv("USER")).arg(getenv("HOST"));
Chris@316:     }
Chris@316:     
Chris@316:     m_ftp->login(username, password);
Chris@316:     
Chris@316:     QString dirpath = m_url.path().section('/', 0, -2);
Chris@316:     QString filename = m_url.path().section('/', -1);
Chris@316:     
Chris@316:     if (dirpath == "") dirpath = "/";
Chris@316:     m_ftp->cd(dirpath);
Chris@316:     m_ftp->get(filename, m_localFile);
Chris@211: }
Chris@211: 
Chris@211: void
Chris@211: RemoteFile::cleanup()
Chris@211: {
Chris@211:     m_done = true;
Chris@214:     if (m_http) {
Chris@287:         QHttp *h = m_http;
Chris@214:         m_http = 0;
Chris@287:         h->abort();
Chris@287:         h->deleteLater();
Chris@214:     }
Chris@214:     if (m_ftp) {
Chris@287:         QFtp *f = m_ftp;
Chris@214:         m_ftp = 0;
Chris@287:         f->abort();
Chris@287:         f->deleteLater();
Chris@214:     }
Chris@211:     delete m_progressDialog;
Chris@211:     m_progressDialog = 0;
Chris@304:     delete m_localFile; // does not actually delete the file
Chris@211:     m_localFile = 0;
Chris@208: }
Chris@208: 
Chris@208: bool
Chris@304: RemoteFile::isRemote(QString fileOrUrl)
Chris@304: {
Chris@316:     QString scheme = QUrl(fileOrUrl).scheme().toLower();
Chris@316:     return (scheme == "http" || scheme == "ftp");
Chris@304: }
Chris@304: 
Chris@304: bool
Chris@208: RemoteFile::canHandleScheme(QUrl url)
Chris@208: {
Chris@208:     QString scheme = url.scheme().toLower();
Chris@316:     return (scheme == "http" || scheme == "ftp" ||
Chris@316:             scheme == "file" || scheme == "");
Chris@208: }
Chris@208: 
Chris@210: bool
Chris@210: RemoteFile::isAvailable()
Chris@210: {
Chris@316:     waitForStatus();
Chris@211:     bool available = true;
Chris@211:     if (!m_ok) available = false;
Chris@211:     else available = (m_lastStatus / 100 == 2);
Chris@211:     std::cerr << "RemoteFile::isAvailable: " << (available ? "yes" : "no")
Chris@211:               << std::endl;
Chris@211:     return available;
Chris@210: }
Chris@210: 
Chris@208: void
Chris@316: RemoteFile::waitForStatus()
Chris@316: {
Chris@316:     while (m_ok && (!m_done && m_lastStatus == 0)) {
Chris@316: //        std::cerr << "waitForStatus: processing (last status " << m_lastStatus << ")" << std::endl;
Chris@316:         QApplication::processEvents();
Chris@316:     }
Chris@316: }
Chris@316: 
Chris@316: void
Chris@316: RemoteFile::waitForData()
Chris@208: {
Chris@211:     while (m_ok && !m_done) {
Chris@208:         QApplication::processEvents();
Chris@208:     }
Chris@208: }
Chris@208: 
Chris@316: void
Chris@316: RemoteFile::setLeaveLocalFile(bool leave)
Chris@316: {
Chris@316:     m_leaveLocalFile = leave;
Chris@316: }
Chris@316: 
Chris@208: bool
Chris@208: RemoteFile::isOK() const
Chris@208: {
Chris@208:     return m_ok;
Chris@208: }
Chris@208: 
Chris@208: bool
Chris@208: RemoteFile::isDone() const
Chris@208: {
Chris@208:     return m_done;
Chris@208: }
Chris@208: 
Chris@316: bool
Chris@316: RemoteFile::isRemote() const
Chris@316: {
Chris@316:     return m_remote;
Chris@316: }
Chris@316: 
Chris@316: QString
Chris@316: RemoteFile::getLocation() const
Chris@316: {
Chris@316:     return m_url.toString();
Chris@316: }
Chris@316: 
Chris@208: QString
Chris@208: RemoteFile::getLocalFilename() const
Chris@208: {
Chris@208:     return m_localFilename;
Chris@208: }
Chris@208: 
Chris@208: QString
Chris@316: RemoteFile::getContentType() const
Chris@316: {
Chris@316:     return m_contentType;
Chris@316: }
Chris@316: 
Chris@316: QString
Chris@316: RemoteFile::getExtension() const
Chris@316: {
Chris@316:     if (m_localFilename != "") {
Chris@316:         return QFileInfo(m_localFilename).suffix().toLower();
Chris@316:     } else {
Chris@316:         return QFileInfo(m_url.toLocalFile()).suffix().toLower();
Chris@316:     }
Chris@316: }
Chris@316: 
Chris@316: QString
Chris@208: RemoteFile::getErrorString() const
Chris@208: {
Chris@208:     return m_errorString;
Chris@208: }
Chris@208: 
Chris@208: void
Chris@208: RemoteFile::dataReadProgress(int done, int total)
Chris@208: {
Chris@208:     dataTransferProgress(done, total);
Chris@208: }
Chris@208: 
Chris@208: void
Chris@214: RemoteFile::httpResponseHeaderReceived(const QHttpResponseHeader &resp)
Chris@210: {
Chris@210:     m_lastStatus = resp.statusCode();
Chris@210:     if (m_lastStatus / 100 >= 4) {
Chris@210:         m_errorString = QString("%1 %2")
Chris@210:             .arg(resp.statusCode()).arg(resp.reasonPhrase());
Chris@211:         std::cerr << "RemoteFile::responseHeaderReceived: "
Chris@211:                   << m_errorString.toStdString() << std::endl;
Chris@211:     } else {
Chris@211:         std::cerr << "RemoteFile::responseHeaderReceived: "
Chris@211:                   << m_lastStatus << std::endl;
Chris@315:         if (resp.hasContentType()) m_contentType = resp.contentType();
Chris@211:     }        
Chris@210: }
Chris@210: 
Chris@210: void
Chris@214: RemoteFile::ftpCommandFinished(int id, bool error)
Chris@214: {
Chris@214:     std::cerr << "RemoteFile::ftpCommandFinished(" << id << ", " << error << ")" << std::endl;
Chris@214: 
Chris@214:     if (!m_ftp) return;
Chris@214: 
Chris@214:     QFtp::Command command = m_ftp->currentCommand();
Chris@214: 
Chris@214:     if (!error) {
Chris@214:         std::cerr << "RemoteFile::ftpCommandFinished: success for command "
Chris@214:                   << command << std::endl;
Chris@214:         return;
Chris@214:     }
Chris@214: 
Chris@214:     if (command == QFtp::ConnectToHost) {
Chris@214:         m_errorString = tr("Failed to connect to FTP server");
Chris@214:     } else if (command == QFtp::Login) {
Chris@214:         m_errorString = tr("Login failed");
Chris@214:     } else if (command == QFtp::Cd) {
Chris@214:         m_errorString = tr("Failed to change to correct directory");
Chris@214:     } else if (command == QFtp::Get) {
Chris@214:         m_errorString = tr("FTP download aborted");
Chris@214:     }
Chris@214: 
Chris@214:     m_lastStatus = 400; // for done()
Chris@214: }
Chris@214: 
Chris@214: void
Chris@208: RemoteFile::dataTransferProgress(qint64 done, qint64 total)
Chris@208: {
Chris@211:     if (!m_progressDialog) return;
Chris@211: 
Chris@208:     int percent = int((double(done) / double(total)) * 100.0 - 0.1);
Chris@208:     emit progress(percent);
Chris@208: 
Chris@211:     if (percent > 0) {
Chris@211:         m_progressDialog->setValue(percent);
Chris@211:         m_progressDialog->show();
Chris@211:     }
Chris@210: }
Chris@210: 
Chris@210: void
Chris@210: RemoteFile::cancelled()
Chris@210: {
Chris@210:     m_done = true;
Chris@316:     cleanup();
Chris@316: 
Chris@210:     m_ok = false;
Chris@210:     m_errorString = tr("Download cancelled");
Chris@208: }
Chris@208: 
Chris@208: void
Chris@208: RemoteFile::done(bool error)
Chris@208: {
Chris@214:     std::cerr << "RemoteFile::done(" << error << ")" << std::endl;
Chris@211: 
Chris@211:     if (m_done) return;
Chris@211: 
Chris@208:     emit progress(100);
Chris@210: 
Chris@208:     if (error) {
Chris@208:         if (m_http) {
Chris@208:             m_errorString = m_http->errorString();
Chris@208:         } else if (m_ftp) {
Chris@208:             m_errorString = m_ftp->errorString();
Chris@208:         }
Chris@208:     }
Chris@208: 
Chris@210:     if (m_lastStatus / 100 >= 4) {
Chris@211:         error = true;
Chris@210:     }
Chris@210: 
Chris@211:     cleanup();
Chris@208: 
Chris@211:     if (!error) {
Chris@208:         QFileInfo fi(m_localFilename);
Chris@208:         if (!fi.exists()) {
Chris@208:             m_errorString = tr("Failed to create local file %1").arg(m_localFilename);
Chris@211:             error = true;
Chris@208:         } else if (fi.size() == 0) {
Chris@208:             m_errorString = tr("File contains no data!");
Chris@211:             error = true;
Chris@208:         }
Chris@208:     }
Chris@211: 
Chris@211:     if (error) {
Chris@316:         std::cerr << "RemoteFile::done: error is " << error << ", deleting cache file" << std::endl;
Chris@316:         deleteCacheFile();
Chris@211:     }
Chris@211: 
Chris@211:     m_ok = !error;
Chris@211:     m_done = true;
Chris@304:     emit ready();
Chris@211: }
Chris@211: 
Chris@211: void
Chris@316: RemoteFile::deleteCacheFile()
Chris@211: {
Chris@316:     std::cerr << "RemoteFile::deleteCacheFile(\"" << m_localFilename.toStdString() << "\")" << std::endl;
Chris@211: 
Chris@211:     cleanup();
Chris@211: 
Chris@316:     if (m_localFilename == "") {
Chris@316:         return;
Chris@316:     }
Chris@211: 
Chris@316:     if (!isRemote()) {
Chris@316:         std::cerr << "not a cache file" << std::endl;
Chris@316:         return;
Chris@316:     }
Chris@316: 
Chris@316:     if (m_refCounted) {
Chris@304: 
Chris@304:         QMutexLocker locker(&m_mapMutex);
Chris@316:         m_refCounted = false;
Chris@304: 
Chris@304:         if (m_refCountMap[m_url] > 0) {
Chris@304:             m_refCountMap[m_url]--;
Chris@316:             std::cerr << "reduced ref count to " << m_refCountMap[m_url] << std::endl;
Chris@304:             if (m_refCountMap[m_url] > 0) {
Chris@304:                 m_done = true;
Chris@304:                 return;
Chris@304:             }
Chris@304:         }
Chris@304:     }
Chris@304: 
Chris@211:     m_fileCreationMutex.lock();
Chris@211: 
Chris@211:     if (!QFile(m_localFilename).remove()) {
Chris@316:         std::cerr << "RemoteFile::deleteCacheFile: ERROR: Failed to delete file \"" << m_localFilename.toStdString() << "\"" << std::endl;
Chris@211:     } else {
Chris@316:         std::cerr << "RemoteFile::deleteCacheFile: Deleted cache file \"" << m_localFilename.toStdString() << "\"" << std::endl;
Chris@211:         m_localFilename = "";
Chris@211:     }
Chris@211: 
Chris@211:     m_fileCreationMutex.unlock();
Chris@211: 
Chris@208:     m_done = true;
Chris@208: }
Chris@208: 
Chris@210: void
Chris@210: RemoteFile::showProgressDialog()
Chris@210: {
Chris@210:     if (m_progressDialog) m_progressDialog->show();
Chris@210: }
Chris@210: 
Chris@316: bool
Chris@316: RemoteFile::createCacheFile()
Chris@208: {
Chris@316:     {
Chris@316:         QMutexLocker locker(&m_mapMutex);
Chris@316: 
Chris@316:         std::cerr << "RemoteFile::createCacheFile: refcount is " << m_refCountMap[m_url] << std::endl;
Chris@316: 
Chris@316:         if (m_refCountMap[m_url] > 0) {
Chris@316:             m_refCountMap[m_url]++;
Chris@316:             m_localFilename = m_remoteLocalMap[m_url];
Chris@316:             std::cerr << "raised it to " << m_refCountMap[m_url] << std::endl;
Chris@316:             m_refCounted = true;
Chris@316:             return true;
Chris@316:         }
Chris@316:     }
Chris@316: 
Chris@208:     QDir dir;
Chris@208:     try {
Chris@208:         dir = TempDirectory::getInstance()->getSubDirectoryPath("download");
Chris@208:     } catch (DirectoryCreationFailed f) {
Chris@316:         std::cerr << "RemoteFile::createCacheFile: ERROR: Failed to create temporary directory: " << f.what() << std::endl;
Chris@208:         return "";
Chris@208:     }
Chris@208: 
Chris@316:     QString filepart = m_url.path().section('/', -1, -1,
Chris@316:                                             QString::SectionSkipEmpty);
Chris@208: 
Chris@208:     QString extension = filepart.section('.', -1);
Chris@208:     QString base = filepart;
Chris@208:     if (extension != "") {
Chris@208:         base = base.left(base.length() - extension.length() - 1);
Chris@208:     }
Chris@208:     if (base == "") base = "remote";
Chris@208: 
Chris@208:     QString filename;
Chris@208: 
Chris@208:     if (extension == "") {
Chris@208:         filename = base;
Chris@208:     } else {
Chris@208:         filename = QString("%1.%2").arg(base).arg(extension);
Chris@208:     }
Chris@208: 
Chris@208:     QString filepath(dir.filePath(filename));
Chris@208: 
Chris@316:     std::cerr << "RemoteFile::createCacheFile: URL is \"" << m_url.toString().toStdString() << "\", dir is \"" << dir.path().toStdString() << "\", base \"" << base.toStdString() << "\", extension \"" << extension.toStdString() << "\", filebase \"" << filename.toStdString() << "\", filename \"" << filepath.toStdString() << "\"" << std::endl;
Chris@208: 
Chris@316:     QMutexLocker fcLocker(&m_fileCreationMutex);
Chris@316: 
Chris@208:     ++m_count;
Chris@208: 
Chris@208:     if (QFileInfo(filepath).exists() ||
Chris@208:         !QFile(filepath).open(QFile::WriteOnly)) {
Chris@208: 
Chris@316:         std::cerr << "RemoteFile::createCacheFile: Failed to create local file \""
Chris@208:                   << filepath.toStdString() << "\" for URL \""
Chris@316:                   << m_url.toString().toStdString() << "\" (or file already exists): appending suffix instead" << std::endl;
Chris@208: 
Chris@208: 
Chris@208:         if (extension == "") {
Chris@208:             filename = QString("%1_%2").arg(base).arg(m_count);
Chris@208:         } else {
Chris@208:             filename = QString("%1_%2.%3").arg(base).arg(m_count).arg(extension);
Chris@208:         }
Chris@208:         filepath = dir.filePath(filename);
Chris@208: 
Chris@208:         if (QFileInfo(filepath).exists() ||
Chris@208:             !QFile(filepath).open(QFile::WriteOnly)) {
Chris@208: 
Chris@316:             std::cerr << "RemoteFile::createCacheFile: ERROR: Failed to create local file \""
Chris@208:                       << filepath.toStdString() << "\" for URL \""
Chris@316:                       << m_url.toString().toStdString() << "\" (or file already exists)" << std::endl;
Chris@208: 
Chris@208:             return "";
Chris@208:         }
Chris@208:     }
Chris@208: 
Chris@316:     std::cerr << "RemoteFile::createCacheFile: url "
Chris@316:               << m_url.toString().toStdString() << " -> local filename "
Chris@316:               << filepath.toStdString() << std::endl;
Chris@316:     
Chris@316:     m_localFilename = filepath;
Chris@208: 
Chris@316:     return false;
Chris@208: }