corsfilter + errors config in web.xml

charles-rest/src/main/java/com/amihaiemil/charles/filters/CorsFilter.java

@@ -0,0 +1,58 @@
+/*
+ Copyright (c) 2016, Mihai Emil Andronache
+ All rights reserved.
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+ * Neither the name of charles-rest nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package com.amihaiemil.charles.filters;
+
+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;
+
+/**
+ * The HTTP header "Access-Control-Allow-Origin" = "*" has to be set on the responses in order
+ * for the REST services to be callable from JS
+ * @author Mihai Andronache (amihaiemil@gmail.com)
+ * @version $Id$
+ * @since 1.0.0
+ */
+public class CorsFilter implements Filter{
+
+	@Override
+	public void init(FilterConfig filterConfig) throws ServletException {}
+
+	@Override
+	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { 
+		((HttpServletResponse) response).addHeader("Access-Control-Allow-Origin", "*");
+		chain.doFilter(request, response);
+	}
+
+	@Override
+	public void destroy() {}
+
+}

charles-rest/webapp/WEB-INF/web.xml

@@ -1,12 +1,25 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
-  <display-name>charles-rest</display-name>
-  <welcome-file-list>
-    <welcome-file>index.html</welcome-file>
-    <welcome-file>index.htm</welcome-file>
-    <welcome-file>index.jsp</welcome-file>
-    <welcome-file>default.html</welcome-file>
-    <welcome-file>default.htm</welcome-file>
-    <welcome-file>default.jsp</welcome-file>
-  </welcome-file-list>
+    <display-name>charles-rest</display-name>
+    <filter>
+        <filter-name>CorsFilter</filter-name>
+        <filter-class>com.amihaiemil.charles.filters.CorsFilter</filter-class>
+    </filter>
+    <filter-mapping>
+        <filter-name>CorsFilter</filter-name>
+        <url-pattern>/api/*</url-pattern>
+    </filter-mapping>
+
+    <error-page>
+        <error-code>400</error-code>
+        <location>/errors/400.html</location>
+    </error-page>
+    <error-page>
+        <error-code>404</error-code>
+        <location>/errors/404.html</location>
+    </error-page>
+    <error-page>
+        <error-code>500</error-code>
+        <location>/errors/500.html</location>
+    </error-page>
 </web-app>

charles-rest/webapp/errors/400.html

@@ -0,0 +1 @@
+Bad request: error code 400

charles-rest/webapp/errors/404.html

@@ -0,0 +1 @@
+Ooops... page not found: error code 404

charles-rest/webapp/errors/500.html

@@ -0,0 +1 @@
+SERVER FAULT: error code 500