From 62ba922c53a535a5814ac99ad0c9cac8483eeb63 Mon Sep 17 00:00:00 2001
From: Bob Du <i@bobdu.cc>
Date: Tue, 11 Jun 2024 09:02:09 +0800
Subject: [PATCH] [JENKINS-73246] Fix text shown in unexpected locale (#9370)

Signed-off-by: Bob Du <i@bobdu.cc>
(cherry picked from commit 0ad66571bf1f9b7bc4550862dd7a9a5f39684ddc)
---
 .../main/java/hudson/model/Descriptor.java    |  4 ++++
 .../hudson/GetLocaleStaticHelpUrlTest.java    | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/core/src/main/java/hudson/model/Descriptor.java b/core/src/main/java/hudson/model/Descriptor.java
index 817115c3ad17..32b9f1dd0cf0 100644
--- a/core/src/main/java/hudson/model/Descriptor.java
+++ b/core/src/main/java/hudson/model/Descriptor.java
@@ -1007,6 +1007,10 @@ public static URL getStaticHelpUrl(StaplerRequest req, Klass<?> c, String suffix
             if (url != null)    return url;
             url = c.getResource(base + '_' + locale.getLanguage() + ".html");
             if (url != null)    return url;
+            if (locale.getLanguage().equals("en")) {
+                url = c.getResource(base + ".html");
+                if (url != null)    return url;
+            }
         }
 
         // default
diff --git a/core/src/test/java/hudson/GetLocaleStaticHelpUrlTest.java b/core/src/test/java/hudson/GetLocaleStaticHelpUrlTest.java
index 5fd822bc1c55..a61fc0d54656 100644
--- a/core/src/test/java/hudson/GetLocaleStaticHelpUrlTest.java
+++ b/core/src/test/java/hudson/GetLocaleStaticHelpUrlTest.java
@@ -36,6 +36,7 @@
 import java.util.Enumeration;
 import java.util.Locale;
 import org.junit.jupiter.api.Test;
+import org.jvnet.hudson.test.Issue;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.lang.Klass;
 
@@ -191,6 +192,24 @@ public void getStaticHelpUrlAcceptZhResMore() {
         assertThatLocaleResourceIs(id, "help-id_zh_CN.html");
     }
 
+    @Issue("JENKINS-73246")
+    @Test
+    public void getStaticHelpUrlAcceptEnFirst() {
+        // Accept-Language: en-US,en;q=0.9,de;q=0.8
+        StaplerRequest req = mockStaplerRequest(
+                Locale.US,
+                Locale.ENGLISH,
+                Locale.GERMAN
+        );
+
+        Klass klass = mockKlass(
+                "help-id.html",
+                "help-id_de.html"
+        );
+        URL id = Descriptor.getStaticHelpUrl(req, klass, "-id");
+        assertThatLocaleResourceIs(id, "help-id.html");
+    }
+
     private StaplerRequest mockStaplerRequest(Locale... localeArr) {
         StaplerRequest req = mock(StaplerRequest.class);
         Enumeration<Locale> locales = Collections.enumeration(Arrays.asList(localeArr));