get post and max url length

max url length

1. keep urls under 2000 characters

2. ie8-2083 ie9-2083

3. search engines like urls < 2048

cors

1. cross origin http request

2. http://enable-cors.org/ and source code

3. cors

   1. java code

       public class SimpleCorsFilter implements Filter {
      
           private static final Log logger = LogFactory.getLog(SimpleCorsFilter.class);
      
           public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
               logger.info("cors filter start");
               HttpServletResponse response = (HttpServletResponse) res;
               response.setHeader("Access-Control-Allow-Origin", "*");
               response.setHeader("Access-Control-Allow-Methods", "GET, POST, HEAD, PUT, DELETE");
               response.setHeader("Access-Control-Max-Age", "36000");
               response.addHeader("Access-Control-Allow-Headers",
                       "Origin, No-Cache, X-Requested-With, Content-Type, Verification-Hash, User-Id, User-Token");
               chain.doFilter(req, res);
               logger.info("cors filter stop");
           }
      
           public void init(FilterConfig filterConfig) {
      
           }
      
           public void destroy() {
      
           }
       }
      

   2. web.xml

           <filter>
               <filter-name>cors</filter-name>
               <filter-class>io.github.gree2.web.filter.SimpleCorsFilter</filter-class>
           </filter>
           <filter-mapping>
               <filter-name>cors</filter-name>
               <url-pattern>/*</url-pattern>
           </filter-mapping>
      

csrf

1. cross site request forgery

reference

1. what-is-the-maximum-length-of-a-url-in-different-browsers

2. maximum-length-of-http-get-request

3. maximum url length is 2,083 characters in internet explorer

        Microsoft Internet Explorer has a maximum uniform resource locator (URL) length of 2,083 characters.
        Internet Explorer also has a maximum path length of 2,048 characters.
        This limit applies to both POST request and GET request URLs.
   
        If you are using the GET method,
        you are limited to a maximum of 2,048 characters,
        minus the number of characters in the actual path.
   
        POST method is not limited by the size of the URL for submitting name/value pairs.
        These pairs are transferred in the header and not in the URL.
   

4. how-long-of-a-url-can-internet-explorer-9-take