Merge branch 'develop'

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [4.7.2]
+- Bug fix "TypeError: AWS.LexRuntimeV2 is not a constructor" when using Lex V2 based Elicit Response Bots.
+- Bug fix "Cannot read property 'buttons' of undefined" when no buttons specified in response card.
+- Bug fix Protect against TypeError exception while processing fallback intent case for an invalid response provided to a LexV2 Response Bot. 
 ## [4.7.1]
 - Amazon Elasticsearch version 7.10 is now utilized.
 - Encrypted Elasticsearch (production) instance types now use m6g.large.elasticsearch for improved price/performance/memory.

lambda/fulfillment/Makefile

@@ -3,4 +3,4 @@ DST=../../build/lambda/$(NAME).zip
 RESOURCES := $(shell  find . | grep -v node_modules | grep -v test )
 
 $(DST): $(RESOURCES) 
-	echo "Building $(NAME)"; npm install -production && zip -r -q $(DST) .
+	echo "Building $(NAME)"; rm $(DST); npm install -production && zip -r -q $(DST) .

lambda/fulfillment/lib/middleware/lex.js

@@ -204,15 +204,10 @@ function limitLexDisplayTextLength(response) {
     // Lex has limit of max 5 buttons in the responsecard.. if we have more than 5, use the first 5 only.
     // note when using lex-web-ui, this limitation is circumvented by use of the appContext session attribute above.
     let buttons = _.get(response.card,"buttons",[]) ;
-    console.log("in limitLexDisplayText")
-    console.log(buttons)
-    for(i=0;i<response.card.buttons.length;i++){
+    for(let i=0;i<buttons.length;i++){
         response.card.buttons[i].text = response.card.buttons[i].text.slice(0,50)
         response.card.buttons[i].value = response.card.buttons[i].value.slice(0,50)
-
     }
-    console.log("after limitLexDisplayTextLength")
-    console.log(JSON.stringify(response))
     return response;
 }
 

lambda/fulfillment/lib/middleware/lexRouter.js

@@ -79,6 +79,7 @@ function lexV1ClientRequester(params) {
     });
 }
 function lexV2ClientRequester(params) {
+    console.log(`aws sdk version is ${AWS.VERSION}`);
     const lexV2Client = new AWS.LexRuntimeV2();
     return new Promise(function(resolve, reject) {
         lexV2Client.recognizeText(params, function(err, data) {
@@ -167,7 +168,7 @@ async function handleRequest(req, res, botName, botAlias) {
             console.log("Lex V2 parameters: " + JSON.stringify(params));
             const lexv2response = await lexV2ClientRequester(params); 
             console.log("Lex V2 response: " + JSON.stringify(lexv2response));
-            response.message = lexv2response.messages[0].content;
+            response.message = _.get(lexv2response, 'messages[0].content', '');
             // lex v2 FallbackIntent match means it failed to fill desired slot(s).
             if (lexv2response.sessionState.intent.name === "FallbackIntent" || 
                 lexv2response.sessionState.intent.state === "Failed") {
@@ -319,4 +320,4 @@ async function processResponse(req, res, hook, msg) {
     return resp;
 }
 
-exports.elicitResponse=processResponse;
+exports.elicitResponse=processResponse;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "aws-ai-qna-bot",
-  "version": "4.7.1",
+  "version": "4.7.2",
   "engines": {
     "node": ">=12.16.1",
     "npm": ">=7.8.0"