merged Catch and ignore utf8 format exception in getFavicons()

CHANGELOG.md

@@ -43,6 +43,7 @@
 - Merged "Android - Load client certificate from local storage" [#1241](https://github.com/pichillilorenzo/flutter_inappwebview/pull/1241) (thanks to [akioyamamoto1977](https://github.com/akioyamamoto1977))
 - Merged "fix Theme_AppCompat_Dialog_Alert not found" [#1262](https://github.com/pichillilorenzo/flutter_inappwebview/pull/1262) (thanks to [mohenaxiba](https://github.com/mohenaxiba))
 - Merged "Allow a cookie without a domain to be set on Android" [#1295](https://github.com/pichillilorenzo/flutter_inappwebview/pull/1295) (thanks to [bagedevimo](https://github.com/bagedevimo))
+- Merged "Catch and ignore utf8 format exception in getFavicons()" [#1302](https://github.com/pichillilorenzo/flutter_inappwebview/pull/1302) (thanks to [Doflatango](https://github.com/Doflatango))
 
 ## 5.4.4+3
 

lib/src/in_app_webview/in_app_webview_controller.dart

@@ -1533,13 +1533,18 @@ class InAppWebViewController {
     }
 
     if (manifestFound) {
-      Map<String, dynamic> manifest =
-          json.decode(await manifestResponse!.transform(Utf8Decoder()).join());
-      if (manifest.containsKey("icons")) {
-        for (Map<String, dynamic> icon in manifest["icons"]) {
-          favicons.addAll(_createFavicons(webviewUrl, assetPathBase,
-              icon["src"], icon["rel"], icon["sizes"], true));
+      try {
+        Map<String, dynamic> manifest =
+        json.decode(await manifestResponse!.transform(Utf8Decoder()).join());
+        if (manifest.containsKey("icons")) {
+          for (Map<String, dynamic> icon in manifest["icons"]) {
+            favicons.addAll(_createFavicons(webviewUrl, assetPathBase,
+                icon["src"], icon["rel"], icon["sizes"], true));
+          }
         }
+      } on FormatException catch (_) {
+        /// The [manifestResponse] might not has a valid JSON string, catch and
+        /// ignore the error
       }
     }