spring - 在 Spring Rest 文档中记录 byte[] 响应

Question

我正在构建一个 API 并使用 Spring Rest Docs (1.1.1.RELEASE) 对其进行记录，并且有一个 API 以字节数组的形式返回图像。

我需要在 REST 文档中描述响应类型。我不确定如何使用 FieldDescriptor 来完成此操作

当我尝试时:

//get mock byte array
byte[] attachment = "Hello".getBytes();

FieldDescriptor[] contentFields = new FieldDescriptor[] {
            fieldWithPath("").type(byte[].class)
                    .description("bytes of the attachment ")};

    when(serviceMock.getImage("fe329638007b4ea3b2a5")).thenReturn(attachment);

    this.mockMvc
            .perform(RestDocumentationRequestBuilders.get("/api/v1/contents/{contentId}/images", "fe329638007b4ea3b2a5"))
            .andExpect(status().isOk()).andDo(document("{method-name}",
                    pathParameters(parameterWithName("contentId").description("The id of the Content")),
                    responseFields(contentFields)));

    verify(serviceMock, times(1)).getImage("fe329638007b4ea3b2a5");
    verifyNoMoreInteractions(serviceMock);

我收到以下错误

org.springframework.restdocs.payload.PayloadHandlingException: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Hello': was expecting ('true', 'false' or 'null')
 at [Source: [B@13866865; line: 1, column: 11]
at org.springframework.restdocs.payload.JsonContentHandler.readContent(JsonContentHandler.java:86)
at org.springframework.restdocs.payload.JsonContentHandler.findMissingFields(JsonContentHandler.java:52)
at org.springframework.restdocs.payload.AbstractFieldsSnippet.validateFieldDocumentation(AbstractFieldsSnippet.java:152)
at org.springframework.restdocs.payload.AbstractFieldsSnippet.createModel(AbstractFieldsSnippet.java:100)
at org.springframework.restdocs.snippet.TemplatedSnippet.document(TemplatedSnippet.java:64)
at org.springframework.restdocs.generate.RestDocumentationGenerator.handle(RestDocumentationGenerator.java:196)
at org.springframework.restdocs.mockmvc.RestDocumentationResultHandler.handle(RestDocumentationResultHandler.java:55)
at org.springframework.test.web.servlet.MockMvc$1.andDo(MockMvc.java:177)
at com.davita.comms.controller.CommsControllerTest.getThumbnailByContentId(CommsControllerTest.java:205)
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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.restdocs.JUnitRestDocumentation$1.evaluate(JUnitRestDocumentation.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:670)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

有没有办法在FieldDescriptor中提到返回的数据不是json，所以有路径没有意义。

有没有其他方法可以在没有 FieldDescriptor 的情况下记录这一点？

Answer 1

REST Docs 不支持记录二进制负载的内容。请求和响应字段片段旨在记录 JSON 或 XML 有效负载的结构。

我认为使用 REST Docs 生成表来描述二进制响应不会给您带来太多好处，因为没有太多可以断言的内容。任何响应都可以被视为 byte[]，因为这就是响应最原始的形式。例如，JSON 是一个 byte[]，XML 也是如此。它们只是对其内容有特定限制的字节数组。

我只是将其硬编码到您的 .adoc 文件中，而不是尝试使用 REST Docs 生成一个表来描述二进制响应。如果您想在测试中包含一些有关响应内容的断言，那么我会使用一些 MockMvc 的匹配器。例如，您可以断言响应正文与您配置模拟服务返回的字节匹配。