增加跨域功能

以Filter的方式增加跨域功能，直接取得请求头的Origin参数，作为Access-Control-Allow-Origin的值。

code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/controllers/fileupload/FileUploadController.java

@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2022-09-28 15:47:02
  * @LastEditors: Kane
- * @LastEditTime: 2022-09-30 14:52:00
+ * @LastEditTime: 2022-10-09 10:31:02
  * @FilePath: \car_dealer\src\main\java\com\cpic\xim\car_dealer\controllers\fileupload\FileUploadController.java
  * @Description: 
  * 
@@ -45,16 +45,9 @@ public class FileUploadController
      *****************************************************/
     @RequestMapping( path = "/upload_file.do")
     @ResponseBody
-    @CrossOrigin
     public FileUploadResult uploadFile( HttpServletRequest request, HttpServletResponse response,
             MultipartFile uploadFile ) throws IllegalSelectorException, IOException
     {
-        // response.setContentType( "text/json;charset=UTF-8" );
-        // response.setHeader( "Access-Control-Allow-Origin", "*" );
-        // response.setHeader( "Access-Control-Allow-Methods", "GET,POST" );
-
-        request.getCookies();
-
         FileUploadResult result = new FileUploadResult();
         String sessionID = request.getSession().getId();
 

code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/filters/CrosFilter.java

@@ -0,0 +1,43 @@
+/*
+ * @Author: Kane
+ * @Date: 2022-10-09 09:32:33
+ * @LastEditors: Kane
+ * @LastEditTime: 2022-10-09 09:43:01
+ * @FilePath: \car_dealer\src\main\java\com\cpic\xim\car_dealer\filters\CrosFilter.java
+ * @Description: 
+ * 
+ * Copyright (c) ${2022} by Kane, All Rights Reserved. 
+ */
+package com.cpic.xim.car_dealer.filters;
+
+import java.io.IOException;
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class CrosFilter implements Filter
+{
+    @Override
+    public void doFilter( ServletRequest req, ServletResponse resp, FilterChain chain )
+            throws ServletException, IOException
+    {
+        HttpServletRequest request = (HttpServletRequest) req;
+        HttpServletResponse response = (HttpServletResponse) resp;
+        String originHeader = request.getHeader( "Origin" );
+
+        response.setHeader( "Access-Control-Allow-Origin", originHeader );
+        response.setHeader( "Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE" );
+        response.setHeader( "Access-Control-Max-Age", "0" );
+        response.setHeader( "Access-Control-Allow-Headers",
+                "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token" );
+        response.setHeader( "Access-Control-Allow-Credentials", "true" );
+        response.setHeader( "XDomainRequestAllowed", "1" );
+        response.setHeader( "XDomainRequestAllowed", "1" );
+
+        chain.doFilter( request, response );
+    }
+}

code/java/car_dealer/src/main/webapp/WEB-INF/web.xml

@@ -18,4 +18,12 @@
     <url-pattern>*.do</url-pattern>
   </servlet-mapping>
 
+  <filter>
+    <filter-name>cros-filter</filter-name>
+    <filter-class>com.cpic.xim.car_dealer.filters.CrosFilter</filter-class>
+  </filter>
+  <filter-mapping>
+    <filter-name>cros-filter</filter-name>
+    <url-pattern>*.do</url-pattern>
+  </filter-mapping>
 </web-app>

code/java/car_dealer/src/main/webapp/file_upload.html

@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2022-09-29 16:33:30
  * @LastEditors: Kane
- * @LastEditTime: 2022-09-30 21:34:30
+ * @LastEditTime: 2022-10-09 10:24:17
  * @FilePath: \car_dealer\src\main\webapp\file_upload.html
  * @Description: 
  * 
@@ -51,7 +51,9 @@
         </div>
     </body>
     <script>
-        const reqeustURL = "upload/upload_file.do";
+        //const reqeustURL = "upload/upload_file.do";
+        const reqeustURL =
+            "http://localhost:8080/cardealer/upload/upload_file.do";
         const btnUpload = document.getElementById("btnUpload");
 
         function fileUploadChange() {