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https://issues.apache.org/jira/browse/WW-4588?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rich P Peters, II updated WW-4588:
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Attachment: DefaultContentTypeHandlerManager.java
FWIW a modified version of DefaultContentTypeHandlerManager which implements
this feature
> Improve the Struts2 Rest plugin to honor Accept and Content-Type headers
> ------------------------------------------------------------------------
>
> Key: WW-4588
> URL: https://issues.apache.org/jira/browse/WW-4588
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - REST
> Affects Versions: 2.3.24
> Environment: tomcat
> Reporter: Rich P Peters, II
> Labels: rest, struts2
> Attachments: DefaultContentTypeHandlerManager.java
>
>
> Currently the rest plugin primarily looks at the url extension to connect the
> proper content type handlers. This should be extended to use the Accept and
> Content-Type headers to drive the content-type handlers when no extension is
> present. Note that the plugin currently partially handles the case for input
> request using the content-type header, but can be overridden by the extension.
> In a use case, if a request specifies in the header that the Content-Type is
> application/json, the input request data is converted to the json data
> format. If a request specifies the Accept:application/json header , the
> output data will be converted to json. This is cleaner than specifying the
> extension in a lot of cases where the application rest urls have to be
> generated in javascript.
> a short unit test shows how the accept header is ignored:
> {code:java}
> public void testObtainingHandlerForResponseByAcceptHeader() throws
> Exception {
> // given
> final DefaultContentTypeHandlerManager handlerManager = new
> DefaultContentTypeHandlerManager();
> handlerManager.setContainer(new DummyContainer("application/json",
> "json"));
> MockHttpServletRequest request = new MockHttpServletRequest();
> request.setContentType("application/json;charset=UTF-8");
> request.addHeader("accept","application/json;charset=UTF-8");
> request.setRequestURI("/index");
> final MockHttpServletResponse response = new
> MockHttpServletResponse();
> response.setContentType("application/json;charset=UTF-8");
> // when
> ContentTypeHandler handler =
> handlerManager.getHandlerForResponse(request,response);
> // then
> assertNotNull(handler);
> assertEquals("application/json", handler.getContentType());
> assertEquals("json", handler.getExtension());
> }
> {code}
> the output show the failure to acquire a handler:
> {code:java}
> junit.framework.AssertionFailedError: null
> at junit.framework.Assert.fail(Assert.java:47)
> at junit.framework.Assert.assertTrue(Assert.java:20)
> at junit.framework.Assert.assertNotNull(Assert.java:214)
> at junit.framework.Assert.assertNotNull(Assert.java:207)
> at
> org.apache.struts2.rest.DefaultContentTypeHandlerManagerTest.testObtainingHandlerForResponseByAcceptHeader(DefaultContentTypeHandlerManagerTest.java:104)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at junit.framework.TestCase.runTest(TestCase.java:168)
> at junit.framework.TestCase.runBare(TestCase.java:134)
> at junit.framework.TestResult$1.protect(TestResult.java:110)
> at junit.framework.TestResult.runProtected(TestResult.java:128)
> at junit.framework.TestResult.run(TestResult.java:113)
> at junit.framework.TestCase.run(TestCase.java:124)
> at junit.framework.TestSuite.runTest(TestSuite.java:243)
> at junit.framework.TestSuite.run(TestSuite.java:238)
> at
> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
> {code}
> FWIW: Attached is a modified version of the 2.3.24.1 file that implements this
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