JMeter overriding the Content-Type in HttpSamplerProxy event after setting using HeaderManager in java

Question

Setting Content-Type application/json in HeaderManager and passing to Jmeter, but is being overriden while being called as text/plain

            HeaderManager headerManager = new HeaderManager();
            headerManager.add(createHeader("Content-Type", "application/json"));

            HTTPSamplerProxy httpSampler = new HTTPSamplerProxy();
            httpSampler.setProtocol("https");
            httpSampler.setDomain(config.getString("JMETER_DOMAIN"));
            httpSampler.setPath(api);
            httpSampler.setMethod(method);

            TestPlan testPlan = new TestPlan("MY TEST PLAN");

            // Add elements to HashTree
            ListedHashTree testPlanTree = new ListedHashTree();
            testPlanTree.add(testPlan);
            ListedHashTree threadGroupTree = new ListedHashTree(threadGroup);
            threadGroupTree.add(httpSampler,headerManager);
            testPlanTree.add(testPlan, threadGroupTree);            
            // Run Test Plan
            jm.configure(testPlanTree);
            jm.run();

O/p

14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> POST /auth/Authentication/login HTTP/1.1
14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> Connection: close
14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> Content-Length: 33
14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> Content-Type: text/plain
14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> Host: example.com
14:26:57.653 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 >> User-Agent: Apache-HttpClient/4.5.14 (Java/1.8.0_372)
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << HTTP/1.1 415 Unsupported Media Type
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << Date: Tue, 18 Jul 2023 14:26:57 GMT
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << Content-Type: application/problem+json; charset=utf-8
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << Transfer-Encoding: chunked
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << Connection: close
14:26:57.672 [ 1-1] DEBUG org.apache.http.headers - http-outgoing-0 << Server: Kestrel
14:26:57.680 [ 1-1] INFO  org.apache.jmeter.threads.JMeterThread - Thread is done:  1-1
14:26:57.680 [ 1-1] INFO  org.apache.jmeter.threads.JMeterThread - Thread finished:  1-1

How do i change the content-type as per my requirement and avoid jmeter overriding it

Tried using HeaderManager but no luck yet

If I'm not mistaken HttpHeaderManager should be part of TestPlan, you can refer this answer https://stackoverflow.com/questions/13032753/jmeter-how-to-send-request-with-content-type-header — Anton Tokmakov, Jul 18 '23 at 15:26

score 0 · Answer 1 · answered Jul 18 '23 at 15:37

I don't have any issues with the following code:

HeaderManager headerManager = new HeaderManager();
headerManager.add(new Header("Content-Type","application/json"));
headerManager.setName("HTTP Header Manager");
headerManager.setProperty(TestElement.TEST_CLASS,HeaderManager.class.getName());
headerManager.setProperty(TestElement.GUI_CLASS, HeaderPanel.class.getName());

so take a look at your createHeader() function, most probably the problem is somewhere there.

You can also add the following line:

SaveService.saveTree(testPlanTree, Files.newOutputStream(Paths.get("/path/to/test.jmx)));

and open the test.jmx in JMeter GUI and ensure that the HTTP Header Manager is created and the HTTP Request sampler is in its scope.

JMeter overriding the Content-Type in HttpSamplerProxy event after setting using HeaderManager in java

1 Answers1