kio_help.cpp
#include <config.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include <errno.h>
#include <fcntl.h>
#ifdef HAVE_STDIO_H
# include <stdio.h>
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#include <qvaluelist.h>
#include <qfileinfo.h>
#include <qfile.h>
#include <qtextstream.h>
#include <qregexp.h>
#include <qtextcodec.h>
#include <kdebug.h>
#include <kurl.h>
#include <kglobal.h>
#include <klocale.h>
#include <kstandarddirs.h>
#include <kinstance.h>
#include "kio_help.h"
#include <libxslt/xsltutils.h>
#include <libxslt/transform.h>
#include "xslt.h"
using namespace KIO;
QString HelpProtocol::langLookup(const QString& fname)
{
QStringList search;
// assemble the local search paths
const QStringList localDoc = KGlobal::dirs()->resourceDirs("html");
QStringList langs = KGlobal::locale()->languageList();
langs.append( "en" );
langs.remove( "C" );
// this is kind of compat hack as we install our docs in en/ but the
// default language is en_US
for (QStringList::Iterator it = langs.begin(); it != langs.end(); ++it)
if ( *it == "en_US" )
*it = "en";
// look up the different languages
int ldCount = localDoc.count();
for (int id=0; id < ldCount; id++)
{
QStringList::ConstIterator lang;
for (lang = langs.begin(); lang != langs.end(); ++lang)
search.append(QString("%1%2/%3").arg(localDoc[id], *lang, fname));
}
// try to locate the file
QStringList::Iterator it;
for (it = search.begin(); it != search.end(); ++it)
{
kdDebug( 7119 ) << "Looking for help in: " << *it << endl;
QFileInfo info(*it);
if (info.exists() && info.isFile() && info.isReadable())
return *it;
if ( ( *it ).right( 5 ) == ".html" )
{
QString file = (*it).left((*it).findRev('/')) + "/index.docbook";
kdDebug( 7119 ) << "Looking for help in: " << file << endl;
info.setFile(file);
if (info.exists() && info.isFile() && info.isReadable())
return *it;
}
}
return QString::null;
}
QString HelpProtocol::lookupFile(const QString &fname,
const QString &query, bool &redirect)
{
redirect = false;
QString path, result;
path = fname;
result = langLookup(path);
if (result.isEmpty())
{
result = langLookup(path+"/index.html");
if (!result.isEmpty())
{
KURL red( "help:/" );
red.setPath( path + "/index.html" );
red.setQuery( query );
redirection(red);
kdDebug( 7119 ) << "redirect to " << red.url() << endl;
redirect = true;
}
else
{
unicodeError( i18n("There is no documentation available for %1." ).arg(path) );
finished();
return QString::null;
}
} else
kdDebug( 7119 ) << "result " << result << endl;
return result;
}
void HelpProtocol::unicodeError( const QString &t )
{
data(fromUnicode( QString(
"<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=%1\"></head>\n"
"%2</html>" ).arg( QTextCodec::codecForLocale()->name() ).arg( t ) ) );
}
HelpProtocol *slave = 0;
HelpProtocol::HelpProtocol( bool ghelp, const QCString &pool, const QCString &app )
: SlaveBase( ghelp ? "ghelp" : "help", pool, app ), mGhelp( ghelp )
{
slave = this;
}
void HelpProtocol::get( const KURL& url )
{
kdDebug( 7119 ) << "get: path=" << url.path()
<< " query=" << url.query() << endl;
bool redirect;
QString doc;
doc = url.path();
if ( !mGhelp ) {
if (doc.at(0) != '/')
doc = doc.prepend('/');
if (doc.at(doc.length() - 1) == '/')
doc += "index.html";
}
infoMessage(i18n("Looking up correct file"));
if ( !mGhelp ) {
doc = lookupFile(doc, url.query(), redirect);
if (redirect)
{
finished();
return;
}
}
if (doc.isEmpty())
{
error( KIO::ERR_DOES_NOT_EXIST, url.url() );
return;
}
mimeType("text/html");
KURL target;
target.setPath(doc);
if (url.hasHTMLRef())
target.setHTMLRef(url.htmlRef());
kdDebug( 7119 ) << "target " << target.url() << endl;
QString file = target.path();
if ( mGhelp ) {
if ( file.right( 4 ) != ".xml" ) {
get_file( target );
return;
}
} else {
QString docbook_file = file.left(file.findRev('/')) + "/index.docbook";
if (!KStandardDirs::exists(file)) {
file = docbook_file;
} else {
QFileInfo fi(file);
if (fi.isDir()) {
file = file + "/index.docbook";
} else {
if ( file.right( 5 ) != ".html" || !compareTimeStamps( file, docbook_file ) ) {
get_file( target );
return;
} else
file = docbook_file;
}
}
}
infoMessage(i18n("Preparing document"));
if ( mGhelp ) {
QString xsl = "customization/kde-nochunk.xsl";
mParsed = transform(file, locate("dtd", xsl));
kdDebug( 7119 ) << "parsed " << mParsed.length() << endl;
if (mParsed.isEmpty()) {
unicodeError( i18n( "The requested help file could not be parsed:<br>%1" ).arg( file ) );
} else {
int pos1 = mParsed.find( "charset=" );
if ( pos1 > 0 ) {
int pos2 = mParsed.find( '"', pos1 );
if ( pos2 > 0 ) {
mParsed.replace( pos1, pos2 - pos1, "charset=UTF-8" );
}
}
data( mParsed.utf8() );
}
} else {
kdDebug( 7119 ) << "look for cache for " << file << endl;
mParsed = lookForCache( file );
kdDebug( 7119 ) << "cached parsed " << mParsed.length() << endl;
if ( mParsed.isEmpty() ) {
mParsed = transform(file, locate("dtd", "customization/kde-chunk.xsl"));
if ( !mParsed.isEmpty() ) {
infoMessage( i18n( "Saving to cache" ) );
QString cache = file.left( file.length() - 7 );
saveToCache( mParsed, locateLocal( "cache",
"kio_help" + cache +
"cache.bz2" ) );
}
} else infoMessage( i18n( "Using cached version" ) );
kdDebug( 7119 ) << "parsed " << mParsed.length() << endl;
if (mParsed.isEmpty()) {
unicodeError( i18n( "The requested help file could not be parsed:<br>%1" ).arg( file ) );
} else {
QString query = url.query(), anchor;
// if we have a query, look if it contains an anchor
if (!query.isEmpty())
if (query.left(8) == "?anchor=") {
anchor = query.mid(8).lower();
KURL redirURL(url);
redirURL.setQuery(QString::null);
redirURL.setHTMLRef(anchor);
redirection(redirURL);
finished();
return;
}
if (anchor.isEmpty() && url.hasHTMLRef())
anchor = url.htmlRef();
kdDebug( 7119 ) << "anchor: " << anchor << endl;
if ( !anchor.isEmpty() )
{
int index = 0;
while ( true ) {
index = mParsed.find( QRegExp( "<a name=" ), index);
if ( index == -1 ) {
kdDebug( 7119 ) << "no anchor\n";
break; // use whatever is the target, most likely index.html
}
if ( mParsed.mid( index, 11 + anchor.length() ).lower() ==
QString( "<a name=\"%1\">" ).arg( anchor ) )
{
index = mParsed.findRev( "<FILENAME filename=", index ) +
strlen( "<FILENAME filename=\"" );
QString filename=mParsed.mid( index, 2000 );
filename = filename.left( filename.find( '\"' ) );
QString path = target.path();
path = path.left( path.findRev( '/' ) + 1) + filename;
kdDebug( 7119 ) << "anchor found in " << path <<endl;
target.setPath( path );
break;
}
index++;
}
}
emitFile( target );
}
}
finished();
}
void HelpProtocol::emitFile( const KURL& url )
{
infoMessage(i18n("Looking up section"));
QString filename = url.path().mid(url.path().findRev('/') + 1);
int index = mParsed.find(QString("<FILENAME filename=\"%1\"").arg(filename));
if (index == -1) {
if ( filename == "index.html" ) {
data( fromUnicode( mParsed ) );
return;
}
unicodeError( i18n("Could not find filename %1 in %2.").arg(filename).arg( url.url() ) );
return;
}
QString filedata = splitOut(mParsed, index);
replaceCharsetHeader( filedata );
data( fromUnicode( filedata ) );
data( QByteArray() );
}
void HelpProtocol::mimetype( const KURL &)
{
mimeType("text/html");
finished();
}
// Copied from kio_file to avoid redirects
#define MAX_IPC_SIZE (1024*32)
void HelpProtocol::get_file( const KURL& url )
{
kdDebug( 7119 ) << "get_file " << url.url() << endl;
QCString _path( QFile::encodeName(url.path()));
struct stat buff;
if ( ::stat( _path.data(), &buff ) == -1 ) {
if ( errno == EACCES )
error( KIO::ERR_ACCESS_DENIED, url.path() );
else
error( KIO::ERR_DOES_NOT_EXIST, url.path() );
return;
}
if ( S_ISDIR( buff.st_mode ) ) {
error( KIO::ERR_IS_DIRECTORY, url.path() );
return;
}
if ( S_ISFIFO( buff.st_mode ) || S_ISSOCK ( buff.st_mode ) ) {
error( KIO::ERR_CANNOT_OPEN_FOR_READING, url.path() );
return;
}
int fd = open( _path.data(), O_RDONLY);
if ( fd < 0 ) {
error( KIO::ERR_CANNOT_OPEN_FOR_READING, url.path() );
return;
}
totalSize( buff.st_size );
int processed_size = 0;
char buffer[ MAX_IPC_SIZE ];
QByteArray array;
while( 1 )
{
int n = ::read( fd, buffer, MAX_IPC_SIZE );
if (n == -1)
{
if (errno == EINTR)
continue;
error( KIO::ERR_COULD_NOT_READ, url.path());
close(fd);
return;
}
if (n == 0)
break; // Finished
array.setRawData(buffer, n);
data( array );
array.resetRawData(buffer, n);
processed_size += n;
processedSize( processed_size );
}
data( QByteArray() );
close( fd );
processedSize( buff.st_size );
finished();
}

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