9 files changed, 41 insertions, 0 deletions
diff --git a/src/examples/rrdContent.html b/src/examples/rrdContent.html
index 9b87412..21d7082 100644
--- a/src/examples/rrdContent.html
+++ b/src/examples/rrdContent.html
@@ -161,6 +161,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdHeaderInfo.html b/src/examples/rrdHeaderInfo.html
index 3a772d7..c0feddb 100644
--- a/src/examples/rrdHeaderInfo.html
+++ b/src/examples/rrdHeaderInfo.html
@@ -102,6 +102,10 @@
       // and performs the update of the Web page
       function update_info_handler(bf) {
           var rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdJFlot.html b/src/examples/rrdJFlot.html
index 9c24f59..b5fb4a5 100644
--- a/src/examples/rrdJFlot.html
+++ b/src/examples/rrdJFlot.html
@@ -87,10 +87,15 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
             alert("File "+fname+" is not a valid RRD archive!\n"+err);
+            return 1;
           }
           if (i_rrd_data!=undefined) {
             rrd_data=i_rrd_data;
diff --git a/src/examples/rrdJFlotDefaults.html b/src/examples/rrdJFlotDefaults.html
index d25961e..35f1ee0 100644
--- a/src/examples/rrdJFlotDefaults.html
+++ b/src/examples/rrdJFlotDefaults.html
@@ -95,6 +95,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdJFlotFilter.html b/src/examples/rrdJFlotFilter.html
index c588e90..1fee276 100644
--- a/src/examples/rrdJFlotFilter.html
+++ b/src/examples/rrdJFlotFilter.html
@@ -127,6 +127,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdJFlotFilterRRA.html b/src/examples/rrdJFlotFilterRRA.html
index 7306e37..8f001d4 100644
--- a/src/examples/rrdJFlotFilterRRA.html
+++ b/src/examples/rrdJFlotFilterRRA.html
@@ -121,6 +121,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdJFlotSimple.html b/src/examples/rrdJFlotSimple.html
index 4240f70..81645c4 100644
--- a/src/examples/rrdJFlotSimple.html
+++ b/src/examples/rrdJFlotSimple.html
@@ -108,6 +108,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdJFlotTwo.html b/src/examples/rrdJFlotTwo.html
index 2aed031..4d1c79c 100644
--- a/src/examples/rrdJFlotTwo.html
+++ b/src/examples/rrdJFlotTwo.html
@@ -95,6 +95,10 @@
       // and performs the update of the Web page
       function update_fname_handler1(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname1+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
@@ -108,6 +112,10 @@
 
       function update_fname_handler2(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname2+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
diff --git a/src/examples/rrdMatrixFlot.html b/src/examples/rrdMatrixFlot.html
index 0f61b07..66b3b17 100644
--- a/src/examples/rrdMatrixFlot.html
+++ b/src/examples/rrdMatrixFlot.html
@@ -81,6 +81,10 @@
       // and performs the update of the Web page
       function update_fname_handler(bf,idx) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File at idx "+idx+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {