added error notification for scrapy spiders

frontend/src/utils/html.js

@@ -0,0 +1,16 @@
+export default {
+  htmlEscape: text => {
+    return text.replace(/[<>"&]/g, function (match, pos, originalText) {
+      switch (match) {
+        case '<':
+          return '&lt;'
+        case '>':
+          return '&gt;'
+        case '&':
+          return '&amp;'
+        case '"':
+          return '&quot;'
+      }
+    })
+  }
+}

frontend/src/utils/index.js

@@ -4,6 +4,7 @@ import tour from './tour'
 import log from './log'
 import scrapy from './scrapy'
 import doc from './doc'
+import html from './html'
 
 export default {
   stats,
@@ -11,5 +12,6 @@ export default {
   tour,
   log,
   scrapy,
-  doc
+  doc,
+  html
 }