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greenyleaf/WxAuthInterceptor.java

Created June 19, 2020 13:30
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a Spring interceptor for Weixin(wechat) oauth2
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WxAuthInterceptor.java
package top.sdrkyj.custom.config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import org.springframework.web.util.UriComponentsBuilder;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class WxAuthInterceptor extends HandlerInterceptorAdapter {
public static final String REDIRECT_URL_KEY = "top.sdrkyj.custom.config.WxAuthInterceptor_REDIRECT_URL_KEY";
public static final String STATE_KEY = "top.sdrkyj.custom.config.WxAuthInterceptor_STATE_KEY";
public static final String WX_USER_KEY = "top.sdrkyj.custom.config.WxAuthInterceptor_WX_USER_KEY";
private static final Logger logger = LoggerFactory.getLogger(WxAuthInterceptor.class);
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
logger.info("preHandle entered");
logger.info("request.getSession().getAttribute(WX_USER_KEY), {}", request.getSession().getAttribute(WX_USER_KEY));
if (request.getSession().getAttribute(WX_USER_KEY) == null) {
request.setAttribute("redirect", UriComponentsBuilder.fromHttpUrl(String.valueOf(request.getRequestURL())).query(request.getQueryString()).build().toUriString());
request.getRequestDispatcher("/wx-authorize").forward(request, response);
return false;
}
return true;
}
}
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