Swagger Codegen - GET的内容类型未在Spring-MVC中生成

Question

从swagger.io编辑器页面下载了Swagger宠物商店(简单)并做了一个mvn jetty:run

在Chrome上打开DevTools并执行GET时,我没有看到标题Content-Type字段被设置.

这是在GET/pets {id}

Answer 1

好的,由于在github上的swagger codegen项目上的wing328,找到了这个问题的根本原因.

事实证明,在我们的yaml定义文件的顶部,我们有:

consumes:
 - application/json

这导致所有生成的控制器方法在内容类型上期望application/json.这打破了GET,DELETE和PATCH api调用,在我们的例子中没有任何有效负载.

Answer 2

http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

14.17 内容类型

Content-Type 实体标头字段指示发送给接收者的实体主体的媒体类型，或者在 HEAD 方法的情况下，指示如果请求是 GET 则将发送的媒体类型。Content-Type = "Content-Type" ":" 媒体类型

Content-Type 是请求上下文中无意义的标头。对于“GET”来说更是如此，因为请求没有正文。

如果您可以发布 Chrome 和curl 的请求和响应标头以及正文，我也许可以为您解决此问题。

话虽如此，环顾 StackOverflow 很快就告诉我，Spring 可能会出于与内容编码无关的多种原因引发此错误。例如，您尝试序列化的对象缺少无参数构造函数。

您是否设置了任何日志记录来跟踪 InnerExceptions 和堆栈以查看基本错误是什么？

这是 Spring 对我的应用程序（不是宠物店）所做的事情。您是否也想要我的应用程序的 swagger ui 页面的屏幕截图？

感谢您看到这个罗杰。

2015-11-04 18:32:13.977 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : DispatcherServlet with name 'dispatcherServlet' processing GET request for [/hacker/api/mef/sca/v1/SCA_ETH_FDFr_EC/5]
2015-11-04 18:32:13.977 DEBUG 32416 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /api/mef/sca/v1/SCA_ETH_FDFr_EC/5
2015-11-04 18:32:13.980 DEBUG 32416 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'null' not supported
2015-11-04 18:32:13.980 DEBUG 32416 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Invoking @ExceptionHandler method: public void com.ciena.sca.exception.ApiExceptionHandler.handleOtherErrors(java.lang.Exception,javax.servlet.http.HttpServletResponse)
2015-11-04 18:32:13.980 ERROR 32416 --- [nio-8080-exec-1] c.c.sca.exception.ApiExceptionHandler    : Content type 'null' not supported
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'null' not supported
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.handleNoMatch(RequestMappingInfoHandlerMapping.java:231)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:349)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:296)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:56)
    at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:299)
    at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1120)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:932)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:299)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:76)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
2015-11-04 18:32:13.982 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2015-11-04 18:32:13.982 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Successfully completed request
2015-11-04 18:32:13.983 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : DispatcherServlet with name 'dispatcherServlet' processing GET request for [/hacker/error]
2015-11-04 18:32:13.983 DEBUG 32416 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Looking up handler method for path /error
2015-11-04 18:32:13.983 DEBUG 32416 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Returning handler method [public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)]
2015-11-04 18:32:13.983 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Last-Modified value for [/hacker/error] is: -1
2015-11-04 18:32:13.985 DEBUG 32416 --- [nio-8080-exec-1] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Written [{timestamp=Wed Nov 04 18:32:13 EST 2015, status=400, error=Bad Request, exception=org.springframework.web.HttpMediaTypeNotSupportedException, message=Content type 'null' not supported, path=/hacker/api/mef/sca/v1/SCA_ETH_FDFr_EC/5}] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@2ed7a433]
2015-11-04 18:32:13.985 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2015-11-04 18:32:13.985 DEBUG 32416 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Successfully completed request