From: Ray Lee <rhlee@berkeley.edu>
Date: Wed, 27 Dec 2017 00:14:18 +0000 (-0800)
Subject: DRYD-71: Implement fallback filter.
X-Git-Url: https://git.aero2k.de/?a=commitdiff_plain;h=fbc7c0e8c133de065b5ce988cb1b6e257839b08a;p=tmp%2Fjakarta-migration.git

DRYD-71: Implement fallback filter.
---

diff --git a/services/common/build.xml b/services/common/build.xml
index e62c3dfff..389a5d981 100644
--- a/services/common/build.xml
+++ b/services/common/build.xml
@@ -11,6 +11,7 @@
     <property name="mvn.opts" value="-V" />
     <property name="src" location="src"/>
     <property name="build" location="build"/>
+    <property name="common.jar" value="collectionspace-services-common.jar"/>
 
     <condition property="osfamily-unix">
         <os family="unix" />
@@ -179,6 +180,8 @@
         <copy todir="${jee.server.cspace}/conf"
               file="${src}/main/cspace/config/log/jboss-log4j-release.xml"/>
 		-->
+        <copy file="${basedir}/target/${common.jar}" todir="${jee.server.cspace}/lib"/>
+
 		<antcall target="deploy_aspectj" />
         <antcall target="deploy_spring" />
         <antcall target="deploy_slf4j" />
@@ -200,6 +203,7 @@
 		<!--
         <delete failonerror="false" file="${jee.server.cspace}/conf/jboss-log4j-release.xml"/>
 		-->
+        <delete failonerror="false" file="${jee.server.cspace}/lib/${common.jar}"/>
         <delete failonerror="false" dir="${jee.server.cspace}/cspace/config/services"/>
     </target>
 
diff --git a/services/common/src/main/java/org/collectionspace/services/common/filter/FallbackResourceFilter.java b/services/common/src/main/java/org/collectionspace/services/common/filter/FallbackResourceFilter.java
new file mode 100644
index 000000000..e4831d397
--- /dev/null
+++ b/services/common/src/main/java/org/collectionspace/services/common/filter/FallbackResourceFilter.java
@@ -0,0 +1,68 @@
+package org.collectionspace.services.common.filter;
+
+import java.io.IOException;
+
+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.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+/**
+ * A filter that forwards requests that obtain a 404 error to a fallback,
+ * similar to apache's FallbackResource directive. The path to the fallback file
+ * may be specified using the "file" init parameter. It defaults to "/index.html".
+ */
+public class FallbackResourceFilter implements Filter {
+    String fallbackFile = "/index.html";
+ 
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        String fallbackFile = filterConfig.getInitParameter("file");
+        
+        if (fallbackFile != null) {
+            this.fallbackFile = fallbackFile;
+        }
+    }
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
+        ResponseWrapper responseWrapper = new ResponseWrapper((HttpServletResponse) response);
+
+        chain.doFilter(request, responseWrapper);
+        
+        if (responseWrapper.is404()) {
+            request.getRequestDispatcher(fallbackFile).forward(request, response);
+        }
+    }
+
+    @Override
+    public void destroy() {
+
+    }
+
+    public class ResponseWrapper extends HttpServletResponseWrapper {
+        private boolean is404 = false;
+
+        public ResponseWrapper(HttpServletResponse response) {
+            super(response);
+        }
+        
+        public boolean is404() {
+            return is404;
+        }
+
+        @Override
+        public void sendError(int sc, String msg) throws IOException {
+            if (sc == 404) {
+                is404 = true;
+            }
+            else {
+                super.sendError(sc);
+            }
+        }
+    }
+}