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tdenetwork/librss/loader.cpp

286 lines
5.3 KiB

/*
* loader.cpp
*
* Copyright (c) 2001, 2002, 2003, 2004 Frerich Raabe <raabe@kde.org>
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. For licensing and distribution details, check the
* accompanying file 'COPYING'.
*/
#include "loader.h"
#include "document.h"
#include <kio/job.h>
#include <kprocess.h>
#include <kurl.h>
#include <qdom.h>
#include <qbuffer.h>
#include <qregexp.h>
using namespace RSS;
DataRetriever::DataRetriever()
{
}
DataRetriever::~DataRetriever()
{
}
struct FileRetriever::Private
{
Private()
: buffer(NULL),
lastError(0)
{
}
~Private()
{
delete buffer;
}
QBuffer *buffer;
int lastError;
};
FileRetriever::FileRetriever()
: d(new Private)
{
}
FileRetriever::~FileRetriever()
{
delete d;
}
void FileRetriever::retrieveData(const KURL &url)
{
if (d->buffer)
return;
d->buffer = new QBuffer;
d->buffer->open(IO_WriteOnly);
KIO::Job *job = KIO::get(url, false, false);
connect(job, SIGNAL(data(KIO::Job *, const QByteArray &)),
SLOT(slotData(KIO::Job *, const QByteArray &)));
connect(job, SIGNAL(result(KIO::Job *)), SLOT(slotResult(KIO::Job *)));
connect(job, SIGNAL(permanentRedirection(KIO::Job *, const KURL &, const KURL &)),
SLOT(slotPermanentRedirection(KIO::Job *, const KURL &, const KURL &)));
}
int FileRetriever::errorCode() const
{
return d->lastError;
}
void FileRetriever::slotData(KIO::Job *, const QByteArray &data)
{
d->buffer->writeBlock(data.data(), data.size());
}
void FileRetriever::slotResult(KIO::Job *job)
{
QByteArray data = d->buffer->buffer();
data.detach();
delete d->buffer;
d->buffer = NULL;
d->lastError = job->error();
emit dataRetrieved(data, d->lastError == 0);
}
void FileRetriever::slotPermanentRedirection(KIO::Job *, const KURL &, const KURL &newUrl)
{
emit permanentRedirection(newUrl);
}
struct OutputRetriever::Private
{
Private() : process(NULL),
buffer(NULL),
lastError(0)
{
}
~Private()
{
delete process;
delete buffer;
}
KShellProcess *process;
QBuffer *buffer;
int lastError;
};
OutputRetriever::OutputRetriever() :
d(new Private)
{
}
OutputRetriever::~OutputRetriever()
{
delete d;
}
void OutputRetriever::retrieveData(const KURL &url)
{
// Ignore subsequent calls if we didn't finish the previous job yet.
if (d->buffer || d->process)
return;
d->buffer = new QBuffer;
d->buffer->open(IO_WriteOnly);
d->process = new KShellProcess();
connect(d->process, SIGNAL(processExited(KProcess *)),
SLOT(slotExited(KProcess *)));
connect(d->process, SIGNAL(receivedStdout(KProcess *, char *, int)),
SLOT(slotOutput(KProcess *, char *, int)));
*d->process << url.path();
d->process->start(KProcess::NotifyOnExit, KProcess::Stdout);
}
int OutputRetriever::errorCode() const
{
return d->lastError;
}
void OutputRetriever::slotOutput(KProcess *, char *data, int length)
{
d->buffer->writeBlock(data, length);
}
void OutputRetriever::slotExited(KProcess *p)
{
if (!p->normalExit())
d->lastError = p->exitStatus();
QByteArray data = d->buffer->buffer();
data.detach();
delete d->buffer;
d->buffer = NULL;
delete d->process;
d->process = NULL;
emit dataRetrieved(data, p->normalExit() && p->exitStatus() == 0);
}
struct Loader::Private
{
Private() : retriever(NULL),
lastError(0)
{
}
~Private()
{
delete retriever;
}
DataRetriever *retriever;
int lastError;
};
Loader *Loader::create()
{
return new Loader;
}
Loader *Loader::create(QObject *object, const char *slot)
{
Loader *loader = create();
connect(loader, SIGNAL(loadingComplete(Loader *, Document, Status)),
object, slot);
return loader;
}
Loader::Loader() : d(new Private)
{
}
Loader::~Loader()
{
delete d;
}
void Loader::loadFrom(const KURL &url, DataRetriever *retriever)
{
if (d->retriever != NULL)
return;
d->retriever = retriever;
connect(d->retriever, SIGNAL(dataRetrieved(const QByteArray &, bool)),
this, SLOT(slotRetrieverDone(const QByteArray &, bool)));
d->retriever->retrieveData(url);
}
int Loader::errorCode() const
{
return d->lastError;
}
void Loader::slotRetrieverDone(const QByteArray &data, bool success)
{
d->lastError = d->retriever->errorCode();
delete d->retriever;
d->retriever = NULL;
Document rssDoc;
Status status = Success;
if (success) {
QDomDocument doc;
/* Some servers insert whitespace before the <?xml...?> declaration.
* QDom doesn't tolerate that (and it's right, that's invalid XML),
* so we strip that.
*/
const char *charData = data.data();
int len = data.count();
while (len && QChar(*charData).isSpace()) {
--len;
++charData;
}
/* It seems that some Microsoft-developed code generates UTF-8 files
* with the three leading unicode characters 0357, 0273, 0277. For
* an example, check http://msdn.microsoft.com/rss.xml
*/
if (len > 3 && QChar(*charData) == QChar(0357)) {
len -= 3;
charData += 3;
}
QByteArray tmpData;
tmpData.setRawData(charData, len);
if (doc.setContent(tmpData))
rssDoc = Document(doc);
else
status = ParseError;
tmpData.resetRawData(charData, len);
} else
status = RetrieveError;
emit loadingComplete(this, rssDoc, status);
delete this;
}
#include "loader.moc"
// vim:noet:ts=4