Fix generated cURL requests on Command Endpoints

Steps to reproduce:

Given nuxeo-showcase-content is installed:

• Go to Command Endpoints.
• Go to POST /api/automation/Repository.GetDocument
• Use the browse feature to select a document for the value field.
• Click on RUN.
  => Response is successful, 200.
• Copy the cURL request and run in a terminal.
  => Generated cURL is:

  curl -X POST 'http://localhost:8080/nuxeo/site/automation/Repository.GetDocument' -H 'X-Authentication-Token: cc397ed7-fb38-4fd6-b72c-f805af4fd0a1' -H 'Nuxeo-Transaction-Timeout: 3' -H 'X-NXproperties: *' -H 'X-NXRepository: default' -H 'X-NXVoidOperation: false' -d '{"params":{"value":"75a6c2e8-b402-4091-9450-201ef64761e3"},"context":{}}'
  

  => Response is:

  {"entity-type":"exception","status":500,"message":"java.lang.NullPointerException"}
  

  => Error in server log:

  2018-11-22T15:45:25,223 ERROR [http-nio-0.0.0.0-8080-exec-13] [org.nuxeo.ecm.webengine.app.WebEngineExceptionMapper] java.lang.NullPointerException
  java.lang.NullPointerException: null
  	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.createContext(ExecutableResource.java:60) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.automation.server.jaxrs.OperationResource.execute(OperationResource.java:58) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.doPost(ExecutableResource.java:70) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at sun.reflect.GeneratedMethodAccessor184.invoke(Unknown Source) ~[?:?]
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_73]
  	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_73]
  	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ObjectOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:258) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) ~[jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) [jersey-server-1.19.4.jar:1.19.4]
  	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) [jersey-servlet-1.19.4.jar:1.19.4]
  	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) [jersey-servlet-1.19.4.jar:1.19.4]
  	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) [jersey-servlet-1.19.4.jar:1.19.4]
  	at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.containerService(WebEngineServlet.java:72) [nuxeo-webengine-core-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.service(WebEngineServlet.java:56) [nuxeo-webengine-core-10.3-I20181121_2333.jar:?]
  	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [servlet-api.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-websocket.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.elasticsearch.ElasticSearchFilter.doFilter(ElasticSearchFilter.java:55) [nuxeo-elasticsearch-core-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.webengine.jaxrs.session.SessionCleanupFilter.run(SessionCleanupFilter.java:50) [nuxeo-webengine-jaxrs-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.webengine.app.WebContextFilter.doFilter(WebContextFilter.java:56) [nuxeo-webengine-core-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.webengine.jaxrs.context.RequestContextFilter.run(RequestContextFilter.java:48) [nuxeo-webengine-jaxrs-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.webengine.app.HeaderFixFilter.run(HeaderFixFilter.java:62) [nuxeo-webengine-core-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoThreadTrackerFilter.doFilter(NuxeoThreadTrackerFilter.java:43) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoStandbyFilter.doFilter(NuxeoStandbyFilter.java:67) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.core.management.jtajca.internal.Log4jWebFilter.doFilter(Log4jWebFilter.java:69) [nuxeo-core-management-jtajca-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:120) [nuxeo-platform-ui-web-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:134) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilterInternal(NuxeoAuthenticationFilter.java:631) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilter(NuxeoAuthenticationFilter.java:427) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoCorsCsrfFilter.doFilter(NuxeoCorsCsrfFilter.java:255) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:67) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:64) [nuxeo-platform-web-common-10.3-I20181121_2333.jar:?]
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:9.0.12]
  	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [catalina.jar:9.0.12]
  	at org.apache.catalina.valves.rewrite.RewriteValve.invoke(RewriteValve.java:277) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [catalina.jar:9.0.12]
  	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [catalina.jar:9.0.12]
  	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668) [catalina.jar:9.0.12]
  	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [catalina.jar:9.0.12]
  	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [catalina.jar:9.0.12]
  	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-coyote.jar:9.0.12]
  	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:9.0.12]
  	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770) [tomcat-coyote.jar:9.0.12]
  	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-coyote.jar:9.0.12]
  	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:9.0.12]
  	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_73]
  	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_73]
  	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:9.0.12]
  2018-11-22T15:45:25,223 ERROR [http-nio-0.0.0.0-8080-exec-13] [org.nuxeo.ecm.webengine.app.WebEngineExceptionMapper] java.lang.NullPointerException
  java.lang.NullPointerException: null
  	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.createContext(ExecutableResource.java:60) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.automation.server.jaxrs.OperationResource.execute(OperationResource.java:58) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.doPost(ExecutableResource.java:70) ~[nuxeo-automation-server-10.3-I20181121_2333.jar:?]
  	at sun.reflect.GeneratedMethodAccessor184.invoke(Unknown Source) ~[?:?]
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:...
  

Also reproduced on POST /api/automation/Repository.Query

Workaround:

• Add -H "Content-Type: application/json" to the cURL request as follows:

  curl -X POST 'http://localhost:8080/nuxeo/site/automation/Repository.GetDocument' -H 'X-Authentication-Token: cc397ed7-fb38-4fd6-b72c-f805af4fd0a1' -H 'Nuxeo-Transaction-Timeout: 3' -H 'X-NXproperties: *' -H 'X-NXRepository: default' -H 'X-NXVoidOperation: false' -d '{"params":{"value":"75a6c2e8-b402-4091-9450-201ef64761e3"},"context":{}}'