Propagate http headers to security connector context (related to #5700)

open-metadata-implementation/adapters/authentication-plugins/http-helper/build.gradle

@@ -6,6 +6,7 @@
 
 dependencies {
     implementation 'org.slf4j:slf4j-api'
+    implementation 'javax.servlet:javax.servlet-api'
     testImplementation 'org.mockito:mockito-core'
     testImplementation 'org.testng:testng'
 }

open-metadata-implementation/adapters/authentication-plugins/http-helper/pom.xml

@@ -28,6 +28,11 @@
 
     <dependencies>
 
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>

open-metadata-implementation/adapters/authentication-plugins/http-helper/src/main/java/org/odpi/openmetadata/http/HttpHeadersThreadLocal.java

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+/* Copyright Contributors to the ODPi Egeria project. */
+package org.odpi.openmetadata.http;
+
+import java.util.Map;
+
+/**
+ * HttpHeadersThreadLocal keeps ThreadLocal HTTP headers to be available for request thread.
+ */
+public class HttpHeadersThreadLocal {
+
+    /**
+     * HEADERS_THREAD_LOCAL is a ThreadLocal that holds a map of headers and their value
+     */
+    private static ThreadLocal<Map<String, String>> HEADERS_THREAD_LOCAL = new ThreadLocal<>();
+
+    public static ThreadLocal<Map<String, String>> getHeadersThreadLocal() {
+        return HEADERS_THREAD_LOCAL;
+    }
+}

open-metadata-implementation/adapters/authentication-plugins/http-helper/src/main/java/org/odpi/openmetadata/http/HttpRequestHeadersFilter.java

@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+/* Copyright Contributors to the ODPi Egeria project. */
+package org.odpi.openmetadata.http;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * HttpRequestHeadersFilter is a Java Servlet Filter that receives a list of http header names which are then
+ * saved from the request in HttpHeadersThreadLocal
+ */
+public class HttpRequestHeadersFilter implements Filter {
+    private List<String> headerNames;
+
+    /**
+     * @param headerNames list of http header names
+     */
+    public HttpRequestHeadersFilter(List<String> headerNames) {
+        this.headerNames = headerNames;
+    }
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        Filter.super.init(filterConfig);
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
+            throws IOException, ServletException {
+        HttpServletRequest req = (HttpServletRequest) servletRequest;
+
+        Map<String, String> threadLocalHeaders = new HashMap<>();
+
+        for (String headerName : headerNames) {
+            String headerValue = req.getHeader(headerName);
+            threadLocalHeaders.put(headerName, headerValue);
+        }
+
+        HttpHeadersThreadLocal.getHeadersThreadLocal().set(threadLocalHeaders);
+        filterChain.doFilter(servletRequest, servletResponse);
+    }
+}

open-metadata-implementation/server-chassis/server-chassis-spring/build.gradle

@@ -24,6 +24,7 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-actuator'
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
+    implementation 'org.apache.tomcat.embed:tomcat-embed-core'
     //implementation 'org.springframework.boot:spring-boot-starter-tomcat'
     //implementation 'javax.servlet:javax.servlet-api'
     // Explicitly needed for gradle - added by maven plugin

open-metadata-implementation/server-chassis/server-chassis-spring/src/main/java/org/odpi/openmetadata/serverchassis/springboot/OMAGServerPlatform.java

@@ -10,6 +10,7 @@
 import org.odpi.openmetadata.adminservices.OMAGServerOperationalServices;
 import org.odpi.openmetadata.adminservices.rest.SuccessMessageResponse;
 import org.odpi.openmetadata.http.HttpHelper;
+import org.odpi.openmetadata.http.HttpRequestHeadersFilter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.InitializingBean;
@@ -18,6 +19,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.annotation.Bean;
@@ -77,6 +79,9 @@ public class OMAGServerPlatform
     @Value("${startup.server.list}")
     String startupServers;
 
+    @Value("${header.name.list}")
+    List<String> headerNames;
+
     @Autowired
     private Environment env;
 
@@ -213,4 +218,19 @@ public void onApplicationEvent(StartupFailEvent event) {
 
     }
 
+    /**
+     * Initialization of HttpRequestHeadersFilter. headerNames is a list of headers defined in application properties.
+     * @return bean of an initialized FilterRegistrationBean
+     */
+    @Bean
+    public FilterRegistrationBean<HttpRequestHeadersFilter> getRequestHeadersFilter() {
+        FilterRegistrationBean<HttpRequestHeadersFilter> registrationBean = new FilterRegistrationBean<>();
+
+        registrationBean.setFilter(new HttpRequestHeadersFilter(headerNames));
+        registrationBean.addUrlPatterns("/*");
+        registrationBean.setOrder(1);
+
+        return registrationBean;
+    }
+
 }

open-metadata-implementation/server-chassis/server-chassis-spring/src/main/resources/application.properties

@@ -24,6 +24,8 @@ scan.packages=org.odpi.openmetadata.*
 startup.user=system
 # Comma separated names of servers to be started
 startup.server.list=
+# Comma separated values of http headers to be added to ThreadLocal
+header.name.list=
 
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