Verify that uploaded files are readable when selected

[cascardo/ipsilon.git] / templates / admin / option_config.html

diff --git a/templates/admin/option_config.html b/templates/admin/option_config.html
index 02babe6..14326fd 100644 (file)
--- a/templates/admin/option_config.html
+++ b/templates/admin/option_config.html
@@ -38,7 +38,13 @@
                     var reader = new FileReader(); // instance of the FileReader
                     reader.readAsDataURL(files[0]); // read the local file
  
-                    reader.onloadend = function(){ // set image data as background of div
+                    reader.onloadend = function(e){ // set image data as background of div
+                        var contents = e.target.result;
+                        if (!contents) {
+                            window.alert('Image file is unreadable')
+                            document.getElementById('uploadFile').value = null;
+                        }
+
                         $("#imagePreview").css("background-image", "url("+this.result+")");
                     }
                 }