java - WireMock 失败并出现 NoSuchMethodError HttpServletResponse.getHeader

Question

我正在尝试在我的 JUnit 测试中使用 WireMock 来模拟对外部 API 的调用。

public class ExampleWiremockTest {

    @Rule
    public WireMockRule wireMockRule = new WireMockRule(9999);

    @Before
    public void setUp() {
        stubFor(get(urlEqualTo("/bin/sillyServlet"))
            .willReturn(aResponse()
                .withStatus(200)
                .withBody("Hello WireMock!")
            )
        );

    }

    @Test
    public void testNothing() throws URISyntaxException, IOException {
        URI uri = new URIBuilder().setScheme("http")
            .setHost("localhost")
            .setPort(9999)
            .setPath("/bin/sillyServlet")
            .build();
        HttpGet httpGet = new HttpGet(uri);
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = httpClient.execute(httpGet);
        HttpEntity entity = response.getEntity();
        String body = EntityUtils.toString(entity);
        assertThat(body, is("Hello WireMock!"));
    }

}

代码可以编译，但是当我运行测试时，WireMock 抛出一个 HTTP 500，这似乎是由底层 Servlet API 版本不一致引起的。

Running com.example.core.ExampleWiremockTest
[main] INFO wiremock.org.eclipse.jetty.util.log - Logging initialized @1030ms
[main] INFO wiremock.org.eclipse.jetty.server.Server - jetty-9.2.z-SNAPSHOT
[main] INFO wiremock.org.eclipse.jetty.server.handler.ContextHandler - Started w.o.e.j.s.ServletContextHandler@ef9296d{/__admin,null,AVAILABLE}
[main] INFO wiremock.org.eclipse.jetty.server.handler.ContextHandler - Started w.o.e.j.s.ServletContextHandler@659a969b{/,null,AVAILABLE}
[main] INFO wiremock.org.eclipse.jetty.server.NetworkTrafficServerConnector - Started NetworkTrafficServerConnector@723d73e1{HTTP/1.1}{0.0.0.0:9999}
[main] INFO wiremock.org.eclipse.jetty.server.Server - Started @1168ms
[qtp436546048-16] INFO /__admin - RequestHandlerClass from context returned com.github.tomakehurst.wiremock.http.AdminRequestHandler. Normalized mapped under returned 'null'
[qtp436546048-20] INFO / - RequestHandlerClass from context returned com.github.tomakehurst.wiremock.http.StubRequestHandler. Normalized mapped under returned 'null'
[qtp436546048-20] WARN wiremock.org.eclipse.jetty.servlet.ServletHandler - Error for /bin/sillyServlet
java.lang.NoSuchMethodError: javax.servlet.http.HttpServletResponse.getHeader(Ljava/lang/String;)Ljava/lang/String;
        at wiremock.org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:322)
        at wiremock.org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at wiremock.org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at wiremock.org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at wiremock.org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at wiremock.org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at wiremock.org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at wiremock.org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at wiremock.org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at wiremock.org.eclipse.jetty.server.Server.handle(Server.java:499)
        at wiremock.org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at wiremock.org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at wiremock.org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at wiremock.org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at wiremock.org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)
[qtp436546048-20] WARN wiremock.org.eclipse.jetty.server.HttpChannel - /bin/sillyServlet
java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStarted()Z
        at wiremock.org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:684)
        at wiremock.org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at wiremock.org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at wiremock.org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at wiremock.org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at wiremock.org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at wiremock.org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at wiremock.org.eclipse.jetty.server.Server.handle(Server.java:499)
        at wiremock.org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at wiremock.org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at wiremock.org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at wiremock.org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at wiremock.org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)
[qtp436546048-20] WARN wiremock.org.eclipse.jetty.server.HttpChannel - Could not send response error 500: java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStarted()Z
[main] INFO wiremock.org.eclipse.jetty.server.NetworkTrafficServerConnector - Stopped NetworkTrafficServerConnector@723d73e1{HTTP/1.1}{0.0.0.0:9999}
[main] INFO wiremock.org.eclipse.jetty.server.handler.ContextHandler - Stopped w.o.e.j.s.ServletContextHandler@659a969b{/,null,UNAVAILABLE}
[main] INFO wiremock.org.eclipse.jetty.server.handler.ContextHandler - Stopped w.o.e.j.s.ServletContextHandler@ef9296d{/__admin,null,UNAVAILABLE}
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.577 sec <<< FAILURE! - in com.example.core.ExampleWiremockTest

我的类路径中确实有其他库依赖于不同版本的 Jetty，我认为这是问题的原因。

WireMock 使用 Jetty 9.2.13，我也有对 Cobertura 的传递依赖，它依赖于 6.1.14

我最初尝试使用以下依赖项:

<dependency>
    <groupId>com.github.tomakehurst</groupId>
    <artifactId>wiremock</artifactId>
    <version>2.6.0</version>
</dependency>

我切换到standalone Jar版本，希望它能帮助我避免冲突，但结果完全一样。

<dependency>
    <groupId>com.github.tomakehurst</groupId>
    <artifactId>wiremock-standalone</artifactId>
    <version>2.6.0</version>
</dependency>

Answer 1

检查您的 servlet-api 版本，您可能使用的是旧版本。

这两个方法都是在 Servlet 3.0 中添加的

• > HttpServletResponse.getHeader(String name)
• > HttpServletRequest.isAsyncStarted()

您的类路径中可能有 Servlet 2.5(或 Servlet 2.4)jar。