From 68b83d0c8ece7a5191bdb3041a29526506361e2e Mon Sep 17 00:00:00 2001 From: Brenin Rhodes Date: Thu, 28 Sep 2023 20:10:20 -0600 Subject: [PATCH] Add CdsHooksServlet --- .../jpa/starter/cdshooks/CdsHooksServlet.java | 126 ++++++++++++++++++ .../cdshooks/StarterCdsHooksConfig.java | 49 +++++++ 2 files changed, 175 insertions(+) create mode 100644 src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/CdsHooksServlet.java create mode 100644 src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/StarterCdsHooksConfig.java diff --git a/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/CdsHooksServlet.java b/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/CdsHooksServlet.java new file mode 100644 index 0000000..9c19a18 --- /dev/null +++ b/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/CdsHooksServlet.java @@ -0,0 +1,126 @@ +package ca.uhn.fhir.jpa.starter.cdshooks; + +import java.io.IOException; +import java.util.stream.Collectors; + +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import org.apache.http.entity.ContentType; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.beans.factory.annotation.Configurable; + +import com.fasterxml.jackson.annotation.JsonInclude; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.google.gson.GsonBuilder; +import com.google.gson.JsonParser; + +import ca.uhn.fhir.jpa.starter.AppProperties; +import ca.uhn.fhir.rest.server.RestfulServer; +import ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException; +import ca.uhn.hapi.fhir.cdshooks.api.ICdsServiceRegistry; +import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServiceRequestJson; +import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServiceResponseJson; +import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServicesJson; + +@Configurable +public class CdsHooksServlet extends HttpServlet { + private static final Logger logger = LoggerFactory.getLogger(CdsHooksServlet.class); + private static final long serialVersionUID = 1L; + + @Autowired + private AppProperties appProperties; + @Autowired + ICdsServiceRegistry cdsServiceRegistry; + @Autowired + RestfulServer restfulServer; + + // private final ServletRequestDetails requestDetails = new ServletRequestDetails(); + + // CORS Pre-flight + @Override + protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { + //ErrorHandling.setAccessControlHeaders(resp, appProperties); + resp.setHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType()); + resp.setHeader("X-Content-Type-Options", "nosniff"); + resp.setStatus(HttpServletResponse.SC_OK); + } + + @Override + protected void doGet(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + logger.info(request.getRequestURI()); + if (!request.getRequestURL().toString().endsWith("/cds-services") + && !request.getRequestURL().toString().endsWith("/cds-services/")) { + logger.error(request.getRequestURI()); + throw new ServletException("This servlet is not configured to handle GET requests."); + } + //ErrorHandling.setAccessControlHeaders(response, myAppProperties); + response.setHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType()); + response.getWriter().println(new GsonBuilder().setPrettyPrinting().create().toJson(getServices())); + } + + @Override + protected void doPost(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + try { + if (request.getContentType() == null || !request.getContentType().startsWith("application/json")) { + throw new ServletException(String.format("Invalid content type %s. Please use application/json.", + request.getContentType())); + } + logger.info(request.getRequestURI()); + String service = request.getPathInfo().replace("/", ""); + ObjectMapper mapper = new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL); + + String requestJson = request.getReader().lines().collect(Collectors.joining()); + CdsServiceRequestJson cdsHooksRequest = mapper.readValue(requestJson, CdsServiceRequestJson.class); + logRequestInfo(cdsHooksRequest, requestJson); + + CdsServiceResponseJson serviceResponseJson = cdsServiceRegistry.callService(service, cdsHooksRequest); + + + // Using GSON pretty print format as Jackson's is ugly + String jsonResponse = new GsonBuilder().disableHtmlEscaping().setPrettyPrinting().create() + .toJson(JsonParser.parseString(mapper.writeValueAsString(serviceResponseJson))); + logger.info(jsonResponse); + response.setContentType("text/json;charset=UTF-8"); + response.getWriter().println(jsonResponse); + } catch (BaseServerResponseException e) { + // ErrorHandling.handleError(response, "ERROR: Exception connecting to remote server.", e, myAppProperties); + logger.error(e.toString()); + } catch (Exception e) { + logger.error(e.toString()); + throw new ServletException("ERROR: Exception in cds-hooks processing.", e); + } + } + + private void logRequestInfo(CdsServiceRequestJson request, String jsonRequest) { + logger.info(jsonRequest); + logger.info("cds-hooks hook instance: {}", request.getHookInstance()); + // logger.info("cds-hooks maxCodesPerQuery: {}", this.getProviderConfiguration().getMaxCodesPerQuery()); + // logger.info("cds-hooks expandValueSets: {}", this.getProviderConfiguration().getExpandValueSets()); + // logger.info("cds-hooks queryBatchThreshold: {}", this.getProviderConfiguration().getQueryBatchThreshold()); + // logger.info("cds-hooks searchStyle: {}", this.getProviderConfiguration().getSearchStyle()); + // logger.info("cds-hooks prefetch maxUriLength: {}", this.getProviderConfiguration().getMaxUriLength()); + logger.info("cds-hooks local server address: {}", appProperties.getServer_address()); + logger.info("cds-hooks fhir server address: {}", request.getFhirServer()); + // logger.info("cds-hooks cql_logging_enabled: {}", this.getProviderConfiguration().getCqlLoggingEnabled()); + } + + private CdsServicesJson getServices() { + return cdsServiceRegistry.getCdsServicesJson(); + } + + // public DebugMap getDebugMap() { + // DebugMap debugMap = new DebugMap(); + // if (cqlProperties.getCqlRuntimeOptions().isDebugLoggingEnabled()) { + // // getOptions().getCqlEngineOptions().isDebugLoggingEnabled()) { + // debugMap.setIsLoggingEnabled(true); + // } + // return debugMap; + // } +} diff --git a/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/StarterCdsHooksConfig.java b/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/StarterCdsHooksConfig.java new file mode 100644 index 0000000..f732257 --- /dev/null +++ b/src/main/java/ca/uhn/fhir/jpa/starter/cdshooks/StarterCdsHooksConfig.java @@ -0,0 +1,49 @@ +package ca.uhn.fhir.jpa.starter.cdshooks; + +import org.hl7.fhir.instance.model.api.IBaseResource; +import org.springframework.beans.factory.FactoryBean; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.beans.factory.config.AutowireCapableBeanFactory; +import org.springframework.boot.web.servlet.ServletRegistrationBean; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; +import org.springframework.context.annotation.Import; + +import ca.uhn.fhir.jpa.cache.IResourceChangeListenerRegistry; +import ca.uhn.fhir.rest.server.RestfulServer; +import ca.uhn.hapi.fhir.cdshooks.api.ICdsHooksDaoAuthorizationSvc; +import ca.uhn.hapi.fhir.cdshooks.config.CdsHooksConfig; +import ca.uhn.hapi.fhir.cdshooks.svc.CdsHooksContextBooter; + +@Configuration +@Import(CdsHooksConfig.class) +public class StarterCdsHooksConfig { + @Bean + public CdsHooksContextBooter cdsHooksContextBooter() { + // ourLog.info("No Spring Context provided. Assuming all CDS Services will be registered dynamically."); + return new CdsHooksContextBooter(); + } + + public static class CdsHooksDaoAuthorizationSvc implements ICdsHooksDaoAuthorizationSvc { + @Override + public void authorizePreShow(IBaseResource theResource) {} + } + + @Bean + ICdsHooksDaoAuthorizationSvc cdsHooksDaoAuthorizationSvc() { + return new CdsHooksDaoAuthorizationSvc(); + } + + @Bean + public ServletRegistrationBean cdsHooksRegistrationBean(AutowireCapableBeanFactory beanFactory) { + CdsHooksServlet cdsHooksServlet = new CdsHooksServlet(); + beanFactory.autowireBean(cdsHooksServlet); + + ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(); + registrationBean.setName("cds-hooks servlet"); + registrationBean.setServlet(cdsHooksServlet); + registrationBean.addUrlMappings("/cds-services/*"); + registrationBean.setLoadOnStartup(1); + return registrationBean; + } +}