package io.github.dunwu.javaee.filter;

import io.github.dunwu.javaee.filter.wrapper.UploadRequestWrapper;

import org.apache.commons.lang3.StringUtils;

import java.io.IOException;

import javax.servlet.*;

import javax.servlet.http.HttpServletRequest;

/**

* @author <a href="mailto:forbreak@163.com">Zhang Peng</a>

* @since 2017/3/27.

*/

public class CharacterEncodingFilter extends MyFilter {

private String characterEncoding;

private boolean enabled;

@Override

public void init(FilterConfig config) {

super.init(config);

characterEncoding = config.getInitParameter("characterEncoding");

enabled = "true".equalsIgnoreCase(characterEncoding.trim()) || "1".equalsIgnoreCase(characterEncoding.trim());

}

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

throws IOException, ServletException {

logger.info("{} 开始做过滤处理", this.getClass().getName());

if (enabled || StringUtils.isNotBlank(characterEncoding)) {

request.setCharacterEncoding(characterEncoding);

response.setCharacterEncoding(characterEncoding);

}

logger.info("系统设置HTTP请求和应答的默认编码为 {}", characterEncoding);

chain.doFilter(request, response);

}

public static class UploadFilter implements Filter {

@Override

public void destroy() {

}

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

throws IOException, ServletException {

UploadRequestWrapper uploadRequest = new UploadRequestWrapper((HttpServletRequest) request);

chain.doFilter(uploadRequest, response);

}

@Override

public void init(FilterConfig filterConfig) throws ServletException {

}

}

}