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package com.tk.ipp2.accessgateway.base;

import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

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;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.alibaba.dubbo.common.utils.StringUtils;
import com.tk.dpp.csp.api.enums.InterfaceVersion;
import com.tk.dpp.csp.api.response.FindMerchantResponse;
import com.tk.dpp.csp.api.response.ServiceResponse;
import com.tk.dpp.csp.client.MerchantAuthService;
import com.tk.dpp.domain.member.merchant.Merchant;
import com.tk.ipp2.accessgateway.util.Util;
import com.tk.commons.file.FileUtil;

public class ConvertGatewayFilter implements Filter{
private static Log log = LogFactory.getLog(ConvertGatewayFilter.class);

private final static String OLD_VERSION = "oldVersion";
private final static String VERSION4 = "version4";
private final static String ERROR_PAGE = "errorPage";

//filter初始化值
private Map<String, String> initParamsMap = new HashMap<String, String>();

// 旧网关(2.0网关、3.0网关)地址
private String oldVersion = null;

// 4.0网关地址
private String version4 = null;

//检测到错误后的跳转页面
private String errorPage = null;

@Override
public void doFilter(ServletRequest servletrequest,
ServletResponse servletresponse, FilterChain filterchain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletrequest;
HttpServletResponse response = (HttpServletResponse) servletresponse;
request.setCharacterEncoding("UTF-8");

String servletPath = request.getServletPath();
if(servletPath.equals(oldVersion)){
String merchantCode = Util.getRequest(request, "merchant_code");
if(hasGatewayVersion4(merchantCode)){
forwardVersion4(request,response);
return ;
}
}
filterchain.doFilter(request, response);
}

protected String getResourcePath(HttpServletRequest request) {
        String pathInfo = FileUtil.normalizeAbsolutePath(request.getPathInfo(), false);
        String servletPath = FileUtil.normalizeAbsolutePath(request.getServletPath(), pathInfo.length() != 0);
        return servletPath + pathInfo;
    }

/**
* 判断商户是否开通4.0网关
* @param merchantCode
* @return
*/
protected boolean hasGatewayVersion4(String merchantCode){
log.info("hasGateWayVersion4 parameter merchant_code= " + merchantCode);
boolean has = false;
FindMerchantResponse fmResp = MerchantAuthService.findMerchant(merchantCode);
if (!ServiceResponse.RETCODE_SUCCESS.equals(fmResp.getRetCode())) {
has = false;
return has;
}

Merchant merchant = fmResp.getMerchant();
String gatewayVersion = merchant.getGatewayVersion();
if(InterfaceVersion.InterfaceVersion_V4.getVersion().equals(gatewayVersion)){
has = true;
}
return has;
}

protected void forwardVersion4(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
String queryStr = request.getQueryString();
String path = version4;
if(StringUtils.isNotEmpty(queryStr)){
path += "?" + queryStr;
}
request.getRequestDispatcher(path).forward(request, response);
}

@Override
public void destroy() {
// TODO Auto-generated method stub
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
for (Enumeration<?> e = filterConfig.getInitParameterNames(); e.hasMoreElements();) {
            String key = (String) e.nextElement();
            String value = filterConfig.getInitParameter(key);
            initParamsMap.put(key, value);
        }
oldVersion = initParamsMap.get(OLD_VERSION);
version4 = initParamsMap.get(VERSION4);
errorPage = initParamsMap.get(ERROR_PAGE);
}

}

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<listener>
<listener-class>com.tk.ipp2.accessgateway.listener.IPPContextListener</listener-class>
</listener>

<filter>
<filter-name>paramsFilter</filter-name>
<filter-class>com.tk.commons.web.filter.ParamsFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>

<param-name>excludes</param-name>
<param-value>/css, /images, /image, /js, *.htm, *.html, *.css, *.js, *.jpg, *.gif, *.png</param-value>
</init-param>
<init-param>

<param-name>paramsRegex</param-name>
<param-value><![CDATA[[\u4e00-\u9fa5\\w-:/=&@,\\+\\|\\?\\.\\^\\!\\s'\\[\\]\\{\\}]*]]></param-value>
</init-param>
<init-param>
<param-name>errorPage</param-name>
<param-value>/ipp2/illegalRequest.jsp</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>paramsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


<filter>
<filter-name>convertGatewayFilter</filter-name>
<filter-class>com.tk.ipp2.accessgateway.base.ConvertGatewayFilter</filter-class>
<init-param>
<param-name>oldVersion</param-name>
<param-value>/gateway</param-value>
</init-param>
<init-param>
<param-name>version4</param-name>
<param-value>/ipp2/gateway</param-value>
</init-param>
<init-param>
<param-name>errorPage</param-name>
<param-value>/ipp2/illegalRequest.jsp</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>convertGatewayFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>CheckZHBLoginServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.CheckZHBLoginServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>CheckPicNumberServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.CheckPicNumberServlet</servlet-class>
</servlet>

<servlet>
<servlet-name>ReceiveMerchantServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.ReceiveMerchantServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>CheckNumberServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.GetCheckNumberServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>GetEncryptRandomServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.GetEncryptRandomServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>PayServlet_IPP2</servlet-name>
<servlet-class>com.tk.ipp2.accessgateway.servlet.PayServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>GetQrCodeServlet_ipp2</servlet-name>
    <servlet-class>com.tk.ipp2.accessgateway.servlet.GetQrCodeServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>PaymentCom_IPP2</servlet-name>
    <servlet-class>com.tk.ipp2.accessgateway.servlet.PaymentComServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>CheckExpressSignServlet</servlet-name>
    <servlet-class>com.tk.ipp2.accessgateway.servlet.CheckExpressSignServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>GetSmsCodeServlet_ipp2</servlet-name>
    <servlet-class>com.tk.ipp2.accessgateway.servlet.GetSmsCodeServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>QueryServlet_ipp2</servlet-name>
    <servlet-class>com.tk.ipp2.accessgateway.servlet.QueryServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>PayServlet_IPP2</servlet-name>
<url-pattern>/ipp2/Pay</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>ReceiveMerchantServlet_IPP2</servlet-name>
<url-pattern>/ipp2/gateway</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CheckZHBLoginServlet_IPP2</servlet-name>
<url-pattern>/ipp2/checkZHBLogin</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CheckPicNumberServlet_IPP2</servlet-name>
<url-pattern>/ipp2/checkPicNumber</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CheckNumberServlet_IPP2</servlet-name>
<url-pattern>/ipp2/checkNumber</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>GetEncryptRandomServlet_IPP2</servlet-name>
<url-pattern>/ipp2/getEncryptRandomRum</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>GetQrCodeServlet_ipp2</servlet-name>
    <url-pattern>/ipp2/GetQrCode</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>PaymentCom_IPP2</servlet-name>
    <url-pattern>/ipp2/PaymentCom</url-pattern>
</servlet-mapping>

<servlet-mapping>
    <servlet-name>CheckExpressSignServlet</servlet-name>
    <url-pattern>/ipp2/CheckExpressSign</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>GetSmsCodeServlet_ipp2</servlet-name>
    <url-pattern>/ipp2/GetSmsCode</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>QueryServlet_ipp2</servlet-name>
    <url-pattern>/ipp2/query</url-pattern>
</servlet-mapping>

<error-page>
<error-code>400</error-code>
<location>/ipp2/wrong_404.jsp</location>
</error-page>
<error-page>
<error-code>401</error-code>
<location>/ipp2/wrong_404.jsp</location>
</error-page>

<error-page>
<error-code>403</error-code>
<location>/ipp2/wrong_404.jsp</location>
</error-page>

<error-page>
<error-code>404</error-code>
<location>/ipp2/wrong_404.jsp</location>
</error-page>

<error-page>
<error-code>405</error-code>
<location>/ipp2/wrong_404.jsp</location>
</error-page>

<error-page>
<error-code>500</error-code>
<location>/ipp2/payfail.jsp</location>
</error-page>

<error-page>
<exception-type>java.lang.Exception</exception-type>
<location>/ipp2/payfail.jsp</location>
</error-page>

</web-app>

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