GH-1034 Add implementation of ProxyHttpSession, fix Spring Security interaction

spring-cloud-function-adapters/spring-cloud-function-serverless-web/src/main/java/org/springframework/cloud/function/serverless/web/ProxyHttpServletRequest.java

@@ -446,7 +446,7 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public String getScheme() {
-		throw new UnsupportedOperationException();
+		return "https";
 	}
 
 	public void setServerName(String serverName) {
@@ -455,7 +455,7 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public String getServerName() {
-		throw new UnsupportedOperationException();
+		return "spring-serverless-web-proxy";
 	}
 
 	public void setServerPort(int serverPort) {
@@ -464,7 +464,7 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public int getServerPort() {
-		throw new UnsupportedOperationException();
+		return 0;
 	}
 
 	@Override
@@ -582,7 +582,7 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 	 */
 	@Override
 	public boolean isSecure() {
-		throw new UnsupportedOperationException();
+		return false;
 	}
 
 	@Override
@@ -883,7 +883,7 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public StringBuffer getRequestURL() {
-		throw new UnsupportedOperationException();
+		return new StringBuffer(this.requestURI);
 	}
 
 	public void setServletPath(String servletPath) {
@@ -902,6 +902,9 @@ public class ProxyHttpServletRequest implements HttpServletRequest {
 	@Override
 	@Nullable
 	public HttpSession getSession(boolean create) {
+		if (this.session == null) {
+			this.session = new ProxyHttpSession(this.servletContext);
+		}
 		return this.session;
 	}
 

spring-cloud-function-adapters/spring-cloud-function-serverless-web/src/main/java/org/springframework/cloud/function/serverless/web/ProxyHttpSession.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2023-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.function.serverless.web;
+
+import java.util.Collections;
+import java.util.Date;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+import jakarta.servlet.ServletContext;
+import jakarta.servlet.http.HttpSession;
+
+/**
+ *
+ * @author Oleg Zhurakousky
+ * @since 4.x
+ *
+ *
+ */
+public class ProxyHttpSession implements HttpSession {
+
+	private final long creationTime;
+
+	private final String sessionId;
+
+	private final ServletContext servletContext;
+
+	private final Map<String, Object> attributes = new HashMap<>();
+
+	public ProxyHttpSession(ServletContext servletContext) {
+		this.creationTime = new Date().getTime();
+		this.sessionId = UUID.randomUUID().toString();
+		this.servletContext = servletContext;
+	}
+
+	@Override
+	public long getCreationTime() {
+		return this.creationTime;
+	}
+
+	@Override
+	public String getId() {
+		return this.sessionId;
+	}
+
+	@Override
+	public long getLastAccessedTime() {
+		return 0;
+	}
+
+	@Override
+	public ServletContext getServletContext() {
+		return this.servletContext;
+	}
+
+	@Override
+	public void setMaxInactiveInterval(int interval) {
+
+	}
+
+	@Override
+	public int getMaxInactiveInterval() {
+		return 0;
+	}
+
+	@Override
+	public Object getAttribute(String name) {
+		return this.attributes.get(name);
+	}
+
+	@Override
+	public Enumeration<String> getAttributeNames() {
+		return Collections.enumeration(this.attributes.keySet());
+	}
+
+	@Override
+	public void setAttribute(String name, Object value) {
+		this.attributes.put(name, value);
+	}
+
+	@Override
+	public void removeAttribute(String name) {
+		this.attributes.remove(name);
+	}
+
+	@Override
+	public void invalidate() {
+
+	}
+
+	@Override
+	public boolean isNew() {
+		return false;
+	}
+
+}

spring-cloud-function-adapters/spring-cloud-function-serverless-web/src/main/java/org/springframework/cloud/function/serverless/web/ProxyMvc.java

@@ -170,6 +170,7 @@ public class ProxyMvc {
 		ProxyFilterChain(DispatcherServlet servlet) {
 			List<Filter> filters = new ArrayList<>();
 			servlet.getServletContext().getFilterRegistrations().values().forEach(fr -> filters.add(((ProxyFilterRegistration) fr).getFilter()));
+			servlet.getWebApplicationContext().getBeansOfType(Filter.class).values().forEach(f -> filters.add(f));
 			Assert.notNull(filters, "filters cannot be null");
 			Assert.noNullElements(filters, "filters cannot contain null values");
 			this.filters = initFilterList(servlet, filters.toArray(new Filter[] {}));

spring-cloud-function-adapters/spring-cloud-function-serverless-web/src/main/java/org/springframework/cloud/function/serverless/web/ProxyServletContext.java

@@ -42,6 +42,8 @@ import jakarta.servlet.descriptor.JspConfigDescriptor;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.springframework.util.ClassUtils;
+
 /**
  * Empty no-op representation of {@link ServletContext} to satisfy required dependencies to
  * successfully proxy incoming web requests to target web application.
@@ -143,7 +145,9 @@ public class ProxyServletContext implements ServletContext {
 
 	@Override
 	public String getServerInfo() {
-		return "serverless-web-proxy";
+		return ClassUtils.isPresent("com.amazonaws.serverless.proxy.spring.SpringLambdaContainerHandler", ClassUtils.getDefaultClassLoader())
+				? "aws-serverless-java-container/6.0"
+						: "serverless-web-proxy";
 	}
 
 	@Override