Rich P Peters, II created WW-4588:
-------------------------------------
Summary: Improve the Struts2 Rest plugin to honor Accept nad
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
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}
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