spring mvc处理ios 请求头不全时空参无法解析的问题处理

浏览数：30 / 时间：2015年06月11日

ios前端比较懒~囧~~，还有已安装的app用户，不愿意更新等问题导致请求头无法补全给服务端springmvc发送过来。。。。。悲剧了

只能服务端自己处理这个不全的http请求空参无法解析的问题

尝试处理方法

1 增加springmvc过滤器对请求进行过滤（失败）

测试发现在访问控制层匹配请求地址之前就已经报错，应该是dispatcher那里出了问题

虽然失败，把代码配置贴出来~~

applicationContext.xml

<mvc:interceptors>
       <mvc:interceptor>
           <mvc:mapping path="/**"/>
           <bean class="com.interceptor.ForIosParam"></bean>
       </mvc:interceptor>
   </mvc:interceptors>

ForIosParam.java

public class ForIosParam implements HandlerInterceptor {

@Override
   public boolean preHandle(HttpServletRequest request,
           HttpServletResponse response, Object handler) throws Exception {
       StringBuffer url=request.getRequestURL();
       Map requestParams=request.getParameterMap();
       Method method=requestParams.getClass().getMethod("setLocked",new Class[]{boolean.class});
       method.invoke(requestParams,new Object[]{new Boolean(false)});
       requestParams.put("ForIosParam", "ForIosParam");
       Map map1=request.getParameterMap();
       request.getRequestURL().append("?ForIosParam=ForIosParam");
       request.setAttribute("ForIosParam", "ForIosParam");
       StringBuffer url1=request.getRequestURL();
       return true;
   }

}

2 使用servlet在接收到请求之后发送再次自己给自己发送一个http完整的请求（失败，为毛请求发出去了，然后就没有然后了一点反应也木有。。。。必须异步的吗？不管那么多了。。。换）这个网上搜就可以java发送http post请求

3 使用 servlet利用post在接收到请求之后，增加参数再服务器跳转forward到springmvc 的get方式接收的方法里（失败啊。。。。。每次都是servlet拦截到。。。。。悲催为毛不管那么多。。。。换）

代码如下

package com.util;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

import com.model.umaiw_app_system;
import com.service.GetInitKeyService;
import com.service.GetTheBestServerService;
import com.service.implement.GetInitKeyServiceImpl;
import com.service.implement.GetTheBestServerServiceImpl;
import com.test.HttpRequest;

public class getTheBestServerServlet extends HttpServlet{

   public void doPost (HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
        response.setContentType("text/json; charset=gb2312");
       Map requestParams=request.getParameterMap();
           Method method;
           try {
               method = requestParams.getClass().getMethod("setLocked",new Class[]{boolean.class});
               method.invoke(requestParams,new Object[]{new Boolean(false)});
           } catch (NoSuchMethodException e) {
               e.printStackTrace();
           } catch (SecurityException e) {
               e.printStackTrace();
           } catch (IllegalAccessException e) {
               e.printStackTrace();
           } catch (IllegalArgumentException e) {
               e.printStackTrace();
           } catch (InvocationTargetException e) {
               e.printStackTrace();
           }
           requestParams.put("ForIosParam", "ForIosParam");
           Map map1=request.getParameterMap();
           request.getRequestURL().append("?ForIosParam=ForIosParam");
           request.setAttribute("ForIosParam", "ForIosParam");
       ServletContext sc = getServletContext();
       RequestDispatcher rd = null;
       rd = sc.getRequestDispatcher(request.getRequestURI()); //定向的页面
       rd.forward(request, response);
       StringBuffer url=request.getRequestURL();
//       response.sendRedirect(url.toString());
   }

}

5 干脆直接用servlet吧无参的http请求处理掉（成功啦~~ ）

不过这种方式因为是单独走的servlet没有走spring mvc和spring框架的支持（木有jdbcTemplate，木有自动注入，木有数据库连接池~~~OMG 对付吧，不管三七二十一拼了，谁让他不补全标准的http请求哒）

代码如下（不能注入就实例化）

//阿里云获取真实ip,这个也让人头疼。。。。。
       String ip=request.getHeader("X-Forwarded-For");
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("Proxy-Client-IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("WL-Proxy-Client-IP");
       }
       if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getRemoteAddr();
       }
       String initKey ="";
       umaiw_app_system uas = getInitKeyService.getinitKey(ip);
       if ( null== uas ) {
           String uuid = UUID.randomUUID().toString();
           initKey = uuid.substring(uuid.length()-8);

           String uuidkey = UUID.randomUUID().toString();
           String key = uuidkey.substring(uuidkey.length()-8);
           try {
               getTheBestServerService.insertKey(ip, initKey, new Date(),key);
           } catch (Exception e) {
               map.put("status", "1");
           }
       } else {
           initKey=uas.getInit_key();
       }


       try {
           map.put("serverIp", DesUtil.encrypt(
           "XX.XX.XX.XX"(可以使负载均衡的ip),initKey));
       } catch (Exception e) {
           e.printStackTrace();
       }
       map.put("initKey", initKey);
       map.put("ip", ip);

       JSONObject jsonObject = JSONObject.fromObject(map);
       response.setContentType("text/html;charset=UTF-8");
       response.getWriter().write(jsonObject.toString());
   }
}

web.xml

<servlet>
    <servlet-name>getTheBestServerServlet</servlet-name>
    <servlet-class>com.util.getTheBestServerServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>getTheBestServerServlet</servlet-name>
    <url-pattern>/system/getTheBestServer</url-pattern>
</servlet-mapping>

数据库访问层用最基本的jdbc访问（别忘了使用完连接关了它，，，，，）

附上阿里云获取真实ip的tomcat下

server.xml最后一行的配置