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