从永远到永远-SpringCloud项目实战（九）-登录（OAuth2、微信登录）
1、OAuth2
一种解决方案
概念候补
2、微信登录
MD，以前写微信支付，也是要营业执照。需要一堆的准备，如下：
https://open.weixin.qq.com
1、注册
2、邮箱激活
3、完善开发者资料
4、开发者资质认证
准备营业执照，1-2个工作日审批、300元
5、创建网站应用
提交审核，7个工作日审批
6、熟悉微信登录流程
参考文档：https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=e547653f995d8f402704d5cb2945177dc8aa4e7e&lang=zh_CN
假装，已经具备这些条件！
1、配置文件中填写微信登录相关信息
# 微信开放平台 appid
wx.open.app_id=你的appid
# 微信开放平台 appsecret
wx.open.app_secret=你的appsecret
# 微信开放平台 重定向url
wx.open.redirect_url=http://你的服务器名称/api/ucenter/wx/callback
2、创建配置类读取上述文件中内容
package com.scbg.ucenter.utils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
/**
* @program: education
* @description:
* @author: WL
* @create: 2020-07-07 00:07
**/
@Component
public class ConstantUtils implements InitializingBean {
@Value("${wx.open.app_id}")
private String appId;
@Value("${wx.open.app_secret}")
private String appSecret;
@Value("${wx.open.redirect_url}")
private String redirectUrl;
public static String WX_OPEN_APP_ID;
public static String WX_OPEN_APP_SECRET;
public static String WX_OPEN_REDIRECT_URL;
@Override
public void afterPropertiesSet() throws Exception {
WX_OPEN_APP_ID = appId;
WX_OPEN_APP_SECRET = appSecret;
WX_OPEN_REDIRECT_URL = redirectUrl;
}
}
3、生成扫描二维码
注意：拼接url的方式： String.format（）
package com.scbg.ucenter.controller;
import com.scbg.ucenter.utils.ConstantUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.net.URLEncoder;
/**
* @program: education
* @description:
* @author: WL
* @create: 2020-07-07 00:17
**/
//@RestController
@Controller// 不返回数据了，而是要跳转页面，所以使用此注解
@RequestMapping("/api/ucenter/wx")
@CrossOrigin
public class WeChatApiController {
/**
* @Description: 生成微信扫描二维码
* @Param:
* @Author WL
* @date: 2020/7/7
* @return:
*/
@GetMapping("login")
public String getWeChatCode(){
// 微信开放平台授权baseUrl %s相当于占位符
String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
"?appid=%s" +
"&redirect_uri=%s" +
"&response_type=code" +
"&scope=snsapi_login" +
"&state=%s" +
"#wechat_redirect";
String redirectUrl= ConstantUtils.WX_OPEN_REDIRECT_URL;
try{
redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
}catch (Exception e){
}
String url= String.format(
baseUrl,
ConstantUtils.WX_OPEN_APP_ID,
redirectUrl,
"scbg"
);
return "redirect:"+url;
}
}
测试接口
4、注意，扫描后的操作。因为用的是他人的域名。想要访问本程序的方法，无法直接实现（没办法将程序部署到别人的服务器上）。所以，先访问配置的域名，其会转发到红框中的地址。这就需要，将本地程序的路径和方法，与他人提供的转发路径一致！学习需要，实际开发中不需要这样做。
5、获取用户信息（重要）
1）导依赖
org.apache.httpcomponents
httpclient
commons-io
commons-io
com.google.code.gson
gson
2、httpclient工具类
package com.scbg.ucenter.utils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
/**
* 依赖的jar包有：commons-lang-2.6.jar、httpclient-4.3.2.jar、httpcore-4.3.1.jar、commons-io-2.4.jar
* @author zhaoyb
*
*/
public class HttpClientUtils {
public static final int connTimeout=10000;
public static final int readTimeout=10000;
public static final String charset="UTF-8";
private static HttpClient client = null;
static {
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
cm.setMaxTotal(128);
cm.setDefaultMaxPerRoute(128);
client = HttpClients.custom().setConnectionManager(cm).build();
}
public static String postParameters(String url, String parameterStr) throws ConnectTimeoutException, SocketTimeoutException, Exception{
return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
}
public static String postParameters(String url, String parameterStr,String charset, Integer connTimeout, Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception{
return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
}
public static String postParameters(String url, Map params) throws ConnectTimeoutException,
SocketTimeoutException, Exception {
return postForm(url, params, null, connTimeout, readTimeout);
}
public static String postParameters(String url, Map params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
SocketTimeoutException, Exception {
return postForm(url, params, null, connTimeout, readTimeout);
}
public static String get(String url) throws Exception {
return get(url, charset, null, null);
}
public static String get(String url, String charset) throws Exception {
return get(url, charset, connTimeout, readTimeout);
}
/**
* 发送一个 Post 请求, 使用指定的字符集编码.
*
* @param url
* @param body RequestBody
* @param mimeType 例如 application/xml "application/x-www-form-urlencoded" a=1&b=2&c=3
* @param charset 编码
* @param connTimeout 建立链接超时时间,毫秒.
* @param readTimeout 响应超时时间,毫秒.
* @return ResponseBody, 使用指定的字符集编码.
* @throws ConnectTimeoutException 建立链接超时异常
* @throws SocketTimeoutException 响应超时
* @throws Exception
*/
public static String post(String url, String body, String mimeType,String charset, Integer connTimeout, Integer readTimeout)
throws ConnectTimeoutException, SocketTimeoutException, Exception {
HttpClient client = null;
HttpPost post = new HttpPost(url);
String result = "";
try {
if (StringUtils.isNotBlank(body)) {
HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));
post.setEntity(entity);
}
// 设置参数
Builder customReqConf = RequestConfig.custom();
if (connTimeout != null) {
customReqConf.setConnectTimeout(connTimeout);
}
if (readTimeout != null) {
customReqConf.setSocketTimeout(readTimeout);
}
post.setConfig(customReqConf.build());
HttpResponse res;
if (url.startsWith("https")) {
// 执行 Https 请求.
client = createSSLInsecureClient();
res = client.execute(post);
} else {
// 执行 Http 请求.
client = HttpClientUtils.client;
res = client.execute(post);
}
result = IOUtils.toString(res.getEntity().getContent(), charset);
} finally {
post.releaseConnection();
if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {
((CloseableHttpClient) client).close();
}
}
return result;
}
/**
* 提交form表单
*
* @param url
* @param params
* @param connTimeout
* @param readTimeout
* @return
* @throws ConnectTimeoutException
* @throws SocketTimeoutException
* @throws Exception
*/
public static String postForm(String url, Map params, Map headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
SocketTimeoutException, Exception {
HttpClient client = null;
HttpPost post = new HttpPost(url);
try {
if (params != null && !params.isEmpty()) {
List formParams = new ArrayList();
Set> entrySet = params.entrySet();
for (Entry entry : entrySet) {
formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);
post.setEntity(entity);
}
if (headers != null && !headers.isEmpty()) {
for (Entry entry : headers.entrySet()) {
post.addHeader(entry.getKey(), entry.getValue());
}
}
// 设置参数
Builder customReqConf = RequestConfig.custom();
if (connTimeout != null) {
customReqConf.setConnectTimeout(connTimeout);
}
if (readTimeout != null) {
customReqConf.setSocketTimeout(readTimeout);
}
post.setConfig(customReqConf.build());
HttpResponse res = null;
if (url.startsWith("https")) {
// 执行 Https 请求.
client = createSSLInsecureClient();
res = client.execute(post);
} else {
// 执行 Http 请求.
client = HttpClientUtils.client;
res = client.execute(post);
}
return IOUtils.toString(res.getEntity().getContent(), "UTF-8");
} finally {
post.releaseConnection();
if (url.startsWith("https") && client != null
&& client instanceof CloseableHttpClient) {
((CloseableHttpClient) client).close();
}
}
}
/**
* 发送一个 GET 请求
*
* @param url
* @param charset
* @param connTimeout 建立链接超时时间,毫秒.
* @param readTimeout 响应超时时间,毫秒.
* @return
* @throws ConnectTimeoutException 建立链接超时
* @throws SocketTimeoutException 响应超时
* @throws Exception
*/
public static String get(String url, String charset, Integer connTimeout,Integer readTimeout)
throws ConnectTimeoutException,SocketTimeoutException, Exception {
HttpClient client = null;
HttpGet get = new HttpGet(url);
String result = "";
try {
// 设置参数
Builder customReqConf = RequestConfig.custom();
if (connTimeout != null) {
customReqConf.setConnectTimeout(connTimeout);
}
if (readTimeout != null) {
customReqConf.setSocketTimeout(readTimeout);
}
get.setConfig(customReqConf.build());
HttpResponse res = null;
if (url.startsWith("https")) {
// 执行 Https 请求.
client = createSSLInsecureClient();
res = client.execute(get);
} else {
// 执行 Http 请求.
client = HttpClientUtils.client;
res = client.execute(get);
}
result = IOUtils.toString(res.getEntity().getContent(), charset);
} finally {
get.releaseConnection();
if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
((CloseableHttpClient) client).close();
}
}
return result;
}
/**
* 从 response 里获取 charset
*
* @param ressponse
* @return
*/
@SuppressWarnings("unused")
private static String getCharsetFromResponse(HttpResponse ressponse) {
// Content-Type:text/html; charset=GBK
if (ressponse.getEntity() != null && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {
String contentType = ressponse.getEntity().getContentType().getValue();
if (contentType.contains("charset=")) {
return contentType.substring(contentType.indexOf("charset=") + 8);
}
}
return null;
}
/**
* 创建 SSL连接
* @return
* @throws GeneralSecurityException
*/
private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {
try {
SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
public boolean isTrusted(X509Certificate[] chain,String authType) throws CertificateException {
return true;
}
}).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {
@Override
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
@Override
public void verify(String host, SSLSocket ssl)
throws IOException {
}
@Override
public void verify(String host, X509Certificate cert)
throws SSLException {
}
@Override
public void verify(String host, String[] cns,
String[] subjectAlts) throws SSLException {
}
});
return HttpClients.custom().setSSLSocketFactory(sslsf).build();
} catch (GeneralSecurityException e) {
throw e;
}
}
public static void main(String[] args) {
try {
String str= post("https://localhost:443/ssl/test.shtml","name=12&page=34","application/x-www-form-urlencoded", "UTF-8", 10000, 10000);
//String str= get("https://localhost:443/ssl/test.shtml?name=12&page=34","GBK");
/*Map map = new HashMap();
map.put("name", "111");
map.put("page", "222");
String str= postForm("https://localhost:443/ssl/test.shtml",map,null, 10000, 10000);*/
System.out.println(str);
} catch (ConnectTimeoutException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SocketTimeoutException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
3、扫码接口
/**
* @Description: 获取扫描人信息，添加数据！
* @Param:
* @Author WL
* @date: 2020/7/7
* @return:
*/
@GetMapping("callback")
public String callBack(String code,String state){
System.out.println("code"+code);
System.out.println("state"+state);
try {
//1 获取临时访问凭证code (getWeChatCode方法中已经实现)
//2、携带code 访问微信指定地址 获取access_token和openid
String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
"?appid=%s" +
"&secret=%s" +
"&code=%s" +
"&grant_type=authorization_code";
String accessTokenUrl = String.format(
baseAccessTokenUrl,
ConstantUtils.WX_OPEN_APP_ID,
ConstantUtils.WX_OPEN_APP_SECRET,
code);
String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
//从返回结果 取出access_token和openid
//gson 将json字符串转换成map 根据key获取
Gson gson= new Gson();
HashMap accessTokenMap = gson.fromJson(accessTokenInfo, HashMap.class);
String access_token= (String) accessTokenMap.get("access_token");
String openid= (String) accessTokenMap.get("openid");
//判断表中是否存在该用户信息 不存在添加
Member member=memberService.getOpenId(openid);
if (null== member){
//3、根据access_token和openid 访问指定地址 得到用户信息
String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
"?access_token=%s" +
"&openid=%s";
String userInfoUrl = String.format(
baseUserInfoUrl,
access_token,
openid
);
String userInfoStr = HttpClientUtils.get(userInfoUrl);
HashMap userInfoMap = gson.fromJson(userInfoStr, HashMap.class);
String nickname = (String) userInfoMap.get("nickname");
String headimgurl = (String) userInfoMap.get("headimgurl");
member= new Member();
member.setOpenid(openid);
member.setNickname(nickname);
member.setAvatar(headimgurl);
memberService.save(member);
}
//jwt生成 token字符串
String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());
//跳转首页
return "redirect:http://localhost:3000?token="+jwtToken;
}catch (Exception e){
throw new EducationException(20001,"扫码登录失败");
}
}
4、前端整合
上一步跳转首页，首页地址中拼接有一个token。做判断，如果有token值，则将其取出，并将数据放置到cookie中。没有的话，则按原来逻辑执行。
注意，?拼接的路径中参数的取值方法
5、测试
