com.healthy.common.security.social.weixin.connet.WeixinOAuth2Template Maven / Gradle / Ivy

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package com.healthy.common.security.social.weixin.connet;

import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.StrUtil;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.social.oauth2.AccessGrant;
import org.springframework.social.oauth2.OAuth2Parameters;
import org.springframework.social.oauth2.OAuth2Template;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import java.nio.charset.StandardCharsets;
import java.util.Map;

/**
 * 完成微信的OAuth2认证流程的模板类。国内厂商实现的OAuth2每个都不同, spring默认提供的OAuth2Template适应不了，只能针对每个厂商自己微调。
 */
@Slf4j
public class WeixinOAuth2Template extends OAuth2Template {

    private static final String REFRESH_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/refresh_token";
    private final String clientId;
    private final String clientSecret;
    private final String accessTokenUrl;

    public WeixinOAuth2Template(String clientId, String clientSecret, String authorizeUrl, String accessTokenUrl) {
        super(clientId, clientSecret, authorizeUrl, accessTokenUrl);
        setUseParametersForClientAuthentication(true);
        this.clientId = clientId;
        this.clientSecret = clientSecret;
        this.accessTokenUrl = accessTokenUrl;
    }

    @Override
    public AccessGrant exchangeForAccess(String authorizationCode, String redirectUri,
                                         MultiValueMap parameters) {

        StringBuilder accessTokenRequestUrl = new StringBuilder(accessTokenUrl);

        accessTokenRequestUrl.append("?appid=" + clientId);
        accessTokenRequestUrl.append("&secret=" + clientSecret);
        accessTokenRequestUrl.append("&code=" + authorizationCode);
        accessTokenRequestUrl.append("&grant_type=authorization_code");
        accessTokenRequestUrl.append("&redirect_uri=" + redirectUri);

        return getAccessToken(accessTokenRequestUrl);
    }

    @Override
    public AccessGrant refreshAccess(String refreshToken, MultiValueMap additionalParameters) {

        StringBuilder refreshTokenUrl = new StringBuilder(REFRESH_TOKEN_URL);

        refreshTokenUrl.append("?appid=" + clientId);
        refreshTokenUrl.append("&grant_type=refresh_token");
        refreshTokenUrl.append("&refresh_token=" + refreshToken);

        return getAccessToken(refreshTokenUrl);
    }

    private AccessGrant getAccessToken(StringBuilder accessTokenRequestUrl) {

        log.info("获取access_token, 请求URL: " + accessTokenRequestUrl.toString());

        String response = getRestTemplate().getForObject(accessTokenRequestUrl.toString(), String.class);

        log.info("获取access_token, 响应内容: " + response);

        Map result = null;
        try {
            result = new ObjectMapper().readValue(response, Map.class);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //返回错误码时直接返回空
        if (StrUtil.isNotBlank(MapUtil.getStr(result, "errcode"))) {
            String errcode = MapUtil.getStr(result, "errcode");
            String errmsg = MapUtil.getStr(result, "errmsg");
            throw new RuntimeException("获取access token失败, errcode:" + errcode + ", errmsg:" + errmsg);
        }

        WeixinAccessGrant accessToken = new WeixinAccessGrant(
                MapUtil.getStr(result, "access_token"),
                MapUtil.getStr(result, "scope"),
                MapUtil.getStr(result, "refresh_token"),
                MapUtil.getLong(result, "expires_in"));

        accessToken.setOpenId(MapUtil.getStr(result, "openid"));

        return accessToken;
    }

    /**
     * 构建获取授权码的请求。也就是引导用户跳转到微信的地址。
     */
    @Override
    public String buildAuthenticateUrl(OAuth2Parameters parameters) {
        String url = super.buildAuthenticateUrl(parameters);
        url = url + "&appid=" + clientId + "&scope=snsapi_login";
        return url;
    }

    @Override
    public String buildAuthorizeUrl(OAuth2Parameters parameters) {
        return buildAuthenticateUrl(parameters);
    }

    /**
     * 微信返回的contentType是html/text，添加相应的HttpMessageConverter来处理。
     */
    @Override
    protected RestTemplate createRestTemplate() {
        RestTemplate restTemplate = super.createRestTemplate();
        restTemplate.getMessageConverters().add(new StringHttpMessageConverter(StandardCharsets.UTF_8));
        return restTemplate;
    }

}