tdf#101094 (19) OPTIONS: Add mechanism to manage not found Web URL: GET

Change-Id: Ie3da55d230631c50968b00cdea176f30051abf37
Reviewed-on: https://gerrit.libreoffice.org/27699
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

ucb/source/ucp/webdav-neon/DAVTypes.cxx

@@ -145,4 +145,33 @@ void DAVOptionsCache::addDAVOptions( DAVOptions & rDAVOptions, const sal_uInt32
 }
 
 
+bool DAVOptionsCache::isResourceFound( const OUString & rURL )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+    OUString aEncodedUrl( ucb_impl::urihelper::encodeURI( NeonUri::unescape( rURL ) ) );
+    normalizeURLLastChar( aEncodedUrl );
+
+    DAVOptionsMap::iterator it;
+    it = m_aTheCache.find( aEncodedUrl );
+    if ( it != m_aTheCache.end() )
+    {
+        // first check for stale
+        TimeValue t1;
+        osl_getSystemTime( &t1 );
+        if( (*it).second.getStaleTime() < t1.Seconds )
+        {
+            m_aTheCache.erase( it );
+            return true; // to force again OPTIONS method
+        }
+
+        // check if the resource was present on server
+        return (*it).second.isResourceFound();
+    }
+    // this value is needed because some web server don't implement
+    // OPTIONS method, so the resource is considered found,
+    // until detected otherwise
+    return true;
+}
+
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */

ucb/source/ucp/webdav-neon/DAVTypes.hxx

@@ -158,6 +158,21 @@ namespace webdav_ucp
         void removeDAVOptions( const OUString & rURL );
         void addDAVOptions( DAVOptions & rDAVOptions, const sal_uInt32 nLifeTime );
 
+        /** Check if the DAV options cached value was found
+            by the last OPTIONS method call.
+            If the cached value is found stale, it is removed.
+
+            @param OUString
+                   the resource URL
+
+            @return bool
+                    true if resource was found or if the Web resource DAV options
+                    are not present (meaning the resource should be checked for
+                    presence anyway)
+                    false if resource was not found
+        */
+        bool isResourceFound( const OUString & rURL );
+
     private:
 
         /// remove the last '/' in aUrl, if it exists

ucb/source/ucp/webdav-neon/webdavcontent.cxx

@@ -2126,6 +2126,9 @@ uno::Any Content::open(
                     DAVResource aResource;
                     std::vector< OUString > aHeaders;
 
+                    // check if the resource was present on the server
+                    if( aStaticDAVOptionsCache.isResourceFound( aTargetURL ) )
+                    {
                         uno::Reference< io::XInputStream > xIn
                             = xResAccess->GET( aHeaders, aResource, xEnv );
                         m_bDidGetOrHead = true;
@@ -2147,6 +2150,27 @@ uno::Any Content::open(
 
                         xDataSink->setInputStream( xIn );
                     }
+                    else
+                    {
+                        // return exception as if the resource was not found
+                        uno::Sequence< uno::Any > aArgs( 1 );
+                        aArgs[ 0 ] <<= beans::PropertyValue(
+                            OUString("Uri"), -1,
+                            uno::makeAny(aTargetURL),
+                            beans::PropertyState_DIRECT_VALUE);
+
+                        ucbhelper::cancelCommandExecution(
+                            uno::makeAny(
+                                ucb::InteractiveAugmentedIOException(
+                                    OUString("Not found!"),
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    task::InteractionClassification_ERROR,
+                                    ucb::IOErrorCode_NOT_EXISTING,
+                                    aArgs ) ),
+                            xEnv );
+                // Unreachable
+                    }
+                }
                 catch ( DAVException const & e )
                 {
                     // check if error is SC_NOT_FOUND