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package com.chinare.axe.auth;

import java.util.List;
import java.util.regex.Pattern;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

import org.nutz.lang.Strings;

/**
 * @author 王贵源 ([email protected])
 *
 */
public abstract class AbstractAuthService implements AuthService {

	static final String AUTHORIZATION_KEY = "Authorization";

	protected HttpServletRequest request;

	/**
	 * 
	 * @param request http 请求
	 */
	public AbstractAuthService(HttpServletRequest request) {
		this.request = request;
	}

	public HttpServletRequest getRequest() {
		return request;
	}

	@Override
	public boolean authentication(List withoutAuthenticationUrlRegulars) {
		return skip() || pass(request.getRequestURI(), withoutAuthenticationUrlRegulars) || user() != null;
	}

	/**
	 * @param uri                              请求地址
	 * @param withoutAuthenticationUrlRegulars 放行url正则
	 * @return 是否放行
	 */
	protected boolean pass(String uri, List withoutAuthenticationUrlRegulars) {
		for (String regular : withoutAuthenticationUrlRegulars) {
			if (Pattern.matches(regular, uri)) {
				return true;
			}
		}
		return false;
	}

	@Override
	public String token() {
		String token = request.getHeader(AUTHORIZATION_KEY);
		if (token == null) {
			Cookie[] cookies = request.getCookies();
			if (cookies != null) {
				for (Cookie ele : cookies) {
					if (Strings.equalsIgnoreCase(ele.getName(), AUTHORIZATION_KEY)) {
						token = ele.getValue();
					}
				}
			}

		}
		if (token == null) {
			token = request.getParameter(AUTHORIZATION_KEY);
		}
		return token;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.chinare.axe.auth.AuthService#userName()
	 */
	@Override
	public String userName() {
		if (token() == null) {
			return null;
		}
		return JwtUtil.getUsername(token());
	}

	@Override
	public boolean skip() {
		return false;
	}

}