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Implement download caching. Set the folder for the cache data in the configuration dialog. Caching is disabled per default and defaults to the systems temp folder.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14476 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dominik Riebeling 2007-08-27 17:40:35 +00:00
parent 0877a1a9f5
commit 5ef236869f
12 changed files with 206 additions and 19 deletions
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81
rbutil/rbutilqt/httpget.cpp
View file

@ -27,8 +27,10 @@
HttpGet::HttpGet(QObject *parent)
: QObject(parent)
{
m_usecache = false;
qDebug() << "--> HttpGet::HttpGet()";
outputToBuffer = true;
cached = false;
getRequest = -1;
connect(&http, SIGNAL(done(bool)), this, SLOT(httpDone(bool)));
connect(&http, SIGNAL(dataReadProgress(int, int)), this, SLOT(httpProgress(int, int)));
@ -42,6 +44,27 @@ HttpGet::HttpGet(QObject *parent)
}
void HttpGet::setCache(QDir d)
{
m_cachedir = d;
bool result = true;
QString p = m_cachedir.absolutePath() + "/rbutil-cache";
if(QFileInfo(m_cachedir.absolutePath()).isDir())
if(!QFileInfo(p).isDir())
result = m_cachedir.mkdir("rbutil-cache");
else result = false;
qDebug() << "HttpGet::setCache(QDir)" << result;
m_usecache = !result;
}
void HttpGet::setCache(bool c)
{
m_usecache = c;
}
QByteArray HttpGet::readAll()
{
return dataBuffer;
@ -108,6 +131,40 @@ bool HttpGet::getFile(const QUrl &url)
return false;
}
}
// put hash generation here so it can get reused later
QString hash = QCryptographicHash::hash(url.toEncoded(), QCryptographicHash::Md5).toHex();
cachefile = m_cachedir.absolutePath() + "/rbutil-cache/" + hash;
if(m_usecache) {
// check if the file is present in cache
qDebug() << "[HTTP] cache ENABLED for" << url.toEncoded();
if(QFileInfo(cachefile).isReadable() && QFileInfo(cachefile).size() > 0) {
qDebug() << "[HTTP] cached file found!" << cachefile;
getRequest = -1;
QFile c(cachefile);
if(!outputToBuffer) {
qDebug() << outputFile->fileName();
c.open(QIODevice::ReadOnly);
outputFile->open(QIODevice::ReadWrite);
outputFile->write(c.readAll());
outputFile->close();
c.close();
}
else {
c.open(QIODevice::ReadOnly);
dataBuffer = c.readAll();
c.close();
}
response = 200; // fake "200 OK" HTTP response
cached = true;
httpDone(false); // we're done now. This will emit the correct signal too.
return true;
}
else qDebug() << "[HTTP] file not cached, downloading to" << cachefile;
}
else {
qDebug() << "[HTTP] cache DISABLED";
}
http.setHost(url.host(), url.port(80));
// construct query (if any)
QList<QPair<QString, QString> > qitems = url.queryItems();
@ -119,14 +176,14 @@ bool HttpGet::getFile(const QUrl &url)
}
if(outputToBuffer) {
qDebug() << "downloading to buffer:" << url.toString();
qDebug() << "[HTTP] downloading to buffer:" << url.toString();
getRequest = http.get(url.path() + query);
}
else {
qDebug() << "downloading to file:" << url.toString() << qPrintable(outputFile->fileName());
qDebug() << "[HTTP] downloading to file:" << url.toString() << qPrintable(outputFile->fileName());
getRequest = http.get(url.path() + query, outputFile);
}
qDebug() << "request scheduled: GET" << getRequest;
qDebug() << "[HTTP] request scheduled: GET" << getRequest;
return true;
}
@ -135,11 +192,25 @@ bool HttpGet::getFile(const QUrl &url)
void HttpGet::httpDone(bool error)
{
if (error) {
qDebug() << "Error: " << qPrintable(http.errorString()) << httpResponse();
qDebug() << "[HTTP] Error: " << qPrintable(http.errorString()) << httpResponse();
}
if(!outputToBuffer)
outputFile->close();
if(m_usecache && !cached) {
qDebug() << "[HTTP] creating cache file" << cachefile;
QFile c(cachefile);
c.open(QIODevice::ReadWrite);
if(!outputToBuffer) {
outputFile->open(QIODevice::ReadOnly | QIODevice::Truncate);
c.write(outputFile->readAll());
outputFile->close();
}
else
c.write(dataBuffer);
c.close();
}
emit done(error);
}