上传文件添加跨域请求

src/main/java/com/ejweb/core/filter/CORSFilter.java

+package com.ejweb.core.filter;
+
+/**
+ * Created by BrianHolsen on 2017-07-26 at 15:52.
+ */
+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.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Servlet Filter implementation class CORSFilter
+ */
+public class CORSFilter implements Filter {
+
+    /**
+     * Default constructor.
+     */
+    public CORSFilter() {
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * @see Filter#destroy()
+     */
+    public void destroy() {
+        // TODO Auto-generated method stub
+    }
+
+    /**
+     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
+     */
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
+            throws IOException, ServletException {
+
+        HttpServletRequest request = (HttpServletRequest) servletRequest;
+        System.out.println("CORSFilter HTTP Request: " + request.getMethod());
+
+        // Authorize (allow) all domains to consume the content
+        ((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Origin", "*");
+        ((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Methods","GET, OPTIONS, HEAD, PUT, POST");
+
+        HttpServletResponse resp = (HttpServletResponse) servletResponse;
+
+        // For HTTP OPTIONS verb/method reply with ACCEPTED status code -- per CORS handshake
+        if (request.getMethod().equals("OPTIONS")) {
+            resp.setStatus(HttpServletResponse.SC_ACCEPTED);
+            return;
+        }
+
+        // pass the request along the filter chain
+        chain.doFilter(request, servletResponse);
+    }
+
+    /**
+     * @see Filter#init(FilterConfig)
+     */
+    public void init(FilterConfig fConfig) throws ServletException {
+        // TODO Auto-generated method stub
+    }
+
+}
\ No newline at end of file

src/main/webapp/WEB-INF/web.xml

@@ -131,6 +131,16 @@
     <filter-name>FileUploadFilter</filter-name>
     <url-pattern>/assets/ckfinder/core/connector/java/connector.java</url-pattern>
   </filter-mapping>
+  <filter>
+    <filter-name>CorsFilter</filter-name>
+    <filter-class>com.ejweb.core.filter.CORSFilter</filter-class>
+  </filter>
+
+  <filter-mapping>
+    <filter-name>CorsFilter</filter-name>
+    <url-pattern>/*</url-pattern>
+  </filter-mapping>
+
   <servlet>
     <servlet-name>UserfilesDownloadServlet</servlet-name>
     <servlet-class>com.ejweb.core.servlet.UserfilesDownloadServlet</servlet-class>