[JENKINS-27607] Noting merge of #1623.

changelog.html

@@ -55,6 +55,9 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
+  <li class=bug>
+    JSONP served with the wrong MIME type and rejected by Chrome.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-27607">issue 27607</a>)
   <li class=bug>
     Security file pattern whitelist was broken for some plugins since 1.597.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-27055">issue 27055</a>)

core/src/main/java/hudson/model/Api.java

@@ -208,7 +208,7 @@ public class Api extends AbstractModelObject {
     public void doJson(StaplerRequest req, StaplerResponse rsp) throws IOException, ServletException {
         if (req.getParameter("jsonp") == null || permit(req)) {
             setHeaders(rsp);
-            rsp.serveExposedBean(req,bean, Flavor.JSON);
+            rsp.serveExposedBean(req,bean, req.getParameter("jsonp") == null ? Flavor.JSON : Flavor.JSONP);
         } else {
             rsp.sendError(HttpURLConnection.HTTP_FORBIDDEN, "jsonp forbidden; implement jenkins.security.SecureRequester");
         }

test/src/test/java/hudson/model/ApiTest.java

@@ -49,6 +49,14 @@ public class ApiTest {
         j.createWebClient().goTo("api/xml?xpath=/*[1]", "application/xml");
     }
 
+    @Issue("JENKINS-27607")
+    @Test public void json() throws Exception {
+        FreeStyleProject p = j.createFreeStyleProject("p");
+        JenkinsRule.WebClient wc = j.createWebClient();
+        assertEquals("{\"name\":\"p\"}", wc.goTo(p.getUrl() + "api/json?tree=name", "application/json").getWebResponse().getContentAsString());
+        assertEquals("wrap({\"name\":\"p\"})", wc.goTo(p.getUrl() + "api/json?tree=name&jsonp=wrap", "application/javascript").getWebResponse().getContentAsString());
+    }
+
     @Test
     @Issue("JENKINS-3267")
     public void wrappedZeroItems() throws Exception {