Automatically fix missing slash in front of error page locations.

Author: adrienlauer

CHANGELOG.md

@@ -1,6 +1,7 @@
-# Version 3.8.6 (2019-07-??)
+# Version 3.8.6 (2019-07-30)
 
 * [new] Introduce the `diag` tool to manually write a diagnostic report to standard output or in a file.
+* [new] Enable configuration of Undertow error pages for specific HTTP codes or exceptions as well as a default error page (`web.server.errorPages` config).
 
 # Version 3.8.5 (2019-03-22)
 

web/undertow/src/main/java/org/seedstack/seed/undertow/internal/DeploymentManagerFactory.java

@@ -90,12 +90,16 @@ private DeploymentInfo configureDeploymentInfo() {
     private Collection<ErrorPage> buildUndertowErrorPages(List<WebConfig.ServerConfig.ErrorPage> errorPages) {
         List<ErrorPage> undertowErrorPages = new ArrayList<>();
         for (WebConfig.ServerConfig.ErrorPage errorPage : errorPages) {
+            String location = errorPage.getLocation();
+            if (!location.startsWith("/")) {
+                location = "/" + location;
+            }
             if (errorPage.getExceptionType() != null) {
-                undertowErrorPages.add(new ErrorPage(errorPage.getLocation(), errorPage.getExceptionType()));
+                undertowErrorPages.add(new ErrorPage(location, errorPage.getExceptionType()));
             } else if (errorPage.getErrorCode() != null) {
-                undertowErrorPages.add(new ErrorPage(errorPage.getLocation(), errorPage.getErrorCode()));
+                undertowErrorPages.add(new ErrorPage(location, errorPage.getErrorCode()));
             } else {
-                undertowErrorPages.add(new ErrorPage(errorPage.getLocation()));
+                undertowErrorPages.add(new ErrorPage(location));
             }
         }
         return undertowErrorPages;

web/undertow/src/test/resources/application.yaml

@@ -16,7 +16,7 @@ web:
     https<https>: true
     welcomeFiles<welcome>: [ 'welcome1.html', 'welcome2.html' ]
     errorPages<errorPages>:
-      - location: /errors/404.html
+      - location: errors/404.html
         errorCode: 404
       - location: /errors/415.html
         errorCode: 415