实现Gitee的第三方登录笔记

鬂已星星也 發表於 2022-3-8 20:58:00

<h2 id="参考资料">参考资料：</h2>
B站博主飞翔的企鹅编号9527 的视频
B站博主逆风微笑的代码狗的视频
官方文档教程
OKHttp官网
<h2 id="前期准备">前期准备：</h2>
创建要接入码云的应用。具体步骤参考官网流程中的创建应用流程
<h2 id="步骤">步骤</h2>
1、创建一个SpringBoot项目
2、在页面中写一个 a 标签，地址为
<code>https://gitee.com/oauth/authorize?client_id={client_id}&redirect_uri={redirect_uri}&response_type=code</code>
可以在后面加上 &state=1
目的：跳转到第三方登录平台进行授权登录
<img src="https://img2022.cnblogs.com/blog/2033685/202203/2033685-20220308205342700-1565863328.png" alt="" loading="lazy">
3、完成授权后，会跳转到你设置的应用回调地址也就是redirect_uri 的地址，并带回参数 <code>state</code>和 <code>code</code>
例如我的回调地址是http://localhost:8089/callback
4、创建Controller类
<pre><code class="language-java"> @GetMapping("/callback")
public String callback(@RequestParam(name = "code")String code,
 @RequestParam(name = "state")String state){

 return "index";
}

</code></pre>
完成授权后就会跳转进入本地的 Controller
5、通过回带参数 <code>state</code>和 <code>code</code> 再次访问Gitee第三方应用得到 <code>access_token</code>
5.1、创建实体类封装对象
<pre><code class="language-java">@Data
@Component
public class AccessTokenDto {

private Integer id;
private String client_id;
private String redirect_uri;
private String code;
private String state;
private String client_secret;
}
</code></pre>
5.2、将<code>client_id</code>、<code>redirect_uri</code>、<code>client_secret</code>写入配置文件以方便日后修改
<pre><code class="language-yml">gitee:
client_id: ????
redirect_uri: http://localhost:8887/callback
client_secret: ?????
</code></pre>
5.3、在Controller中将数据封装成对象
<pre><code class="language-java">@Controller
public class AuthorizeController {

@Autowired
AccessTokenDto accessTokenDto;

@Value("${gitee.client_id}")//获取配置文件中的数据
private String client_id;

@Value("${gitee.redirect_uri}")
private String redirect_uri;

@Value("${gitee.client_secret}")
private String client_secret;

@GetMapping("/callback")
public String callback(@RequestParam(name = "code")String code,
 @RequestParam(name = "state")String state){

 //封装成对象
 accessTokenDto.setClient_id(client_id);
 accessTokenDto.setRedirect_uri(redirect_uri);
 accessTokenDto.setClient_secret(client_secret);
 accessTokenDto.setCode(code);
 accessTokenDto.setState(state);

 return "index";
}
}
</code></pre>
5.3、编写通过参数 <code>state</code>和 <code>code</code> 得到 <code>access_token</code>的方法
5.3.1、引入okhttp依赖和fastjson依赖
<pre><code class="language-xml">
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>4.9.0</version>
</dependency>

 
 <dependency>
 <groupId>com.alibaba</groupId>
 <artifactId>fastjson</artifactId>
 <version>1.2.78</version>
 </dependency>
</code></pre>
5.3.2编写方法
OKHttp官网中的方法体
<pre><code class="language-java">OkHttpClient client = new OkHttpClient();

String run(String url) throws IOException {
Request request = new Request.Builder()
 .url(url)
 .build();

try (Response response = client.newCall(request).execute()) {
return response.body().string();
}
}
</code></pre>
视频中写的方法
<pre><code class="language-java"> public String getAccessToken(AccessTokenDto accessTokenDto){
 MediaType mediaType = MediaType.get("application/json; charset=utf-8");

 OkHttpClient client = new OkHttpClient();
//将对象转化为JSON格式
 RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(accessTokenDto));
 Request request = new Request.Builder()
//官网给的url的值：https://gitee.com/oauth/token?grant_type=authorization_code&code={code}&client_id={client_id}&redirect_uri={redirect_uri}&client_secret={client_secret}
 .url("https://gitee.com/oauth/token?grant_type=authorization_code&code="+accessTokenDto.getCode()+"&client_id="+accessTokenDto.getClient_id()+"&redirect_uri="+accessTokenDto.getRedirect_uri()+"&client_secret="+accessTokenDto.getClient_secret())
 .post(body)
 .build();
 try (Response response = client.newCall(request).execute()) {
 String string = response.body().string();
// System.out.println(string);
 String s = string.split(":").split("\"");//将得到的数据进行分割最终得到accessToken值
// System.out.println(s);
 return s;
 } catch (Exception e) {
 e.printStackTrace();
 }

 return null;
}
</code></pre>
5.3.3在Controller中调用该方法
6、通过得到的<code>access_token</code>再次访问第三方应用得到含有用户信息的JSON数据
6.1、创建用户实体类对象
<pre><code class="language-java">@Data
public class GiteeUser {

private Integer id;
private String name;
private String email;
private String bio;
}
</code></pre>
6.2编写方法，通过accesstoken得到用户信息
<pre><code class="language-java">public GiteeUser getUser(String accesstoken){
OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
 .url("https://gitee.com/api/v5/user?access_token="+accesstoken)
 .build();

try {
 Response response = client.newCall(request).execute();
 String str = response.body().string();
 GiteeUser giteeUser = JSON.parseObject(str, GiteeUser.class);//自动将JSON字符串转化为实体类对象
 return giteeUser;
} catch (Exception e) {
 e.printStackTrace();
}

return null;
}
</code></pre>
6.3在Controller中调用方法
7、最终的Controller
<pre><code class="language-java">@Controller
public class AuthorizeController {

@Autowired
AccessTokenDto accessTokenDto;

@Autowired
GiteeProvider giteeProvider;//两个方法写在该类中

@Value("${gitee.client_id}")
private String client_id;

@Value("${gitee.redirect_uri}")
private String redirect_uri;

@Value("${gitee.client_secret}")
private String client_secret;

@GetMapping("/callback")
public String callback(@RequestParam(name = "code")String code,
 @RequestParam(name = "state")String state){

 accessTokenDto.setClient_id(client_id);
 accessTokenDto.setRedirect_uri(redirect_uri);
 accessTokenDto.setClient_secret(client_secret);
 accessTokenDto.setCode(code);
 accessTokenDto.setState(state);

 //调用方法得到accessToken
 String accessToken = giteeProvider.getAccessToken(accessTokenDto);

 //调用方法得到用户信息
 GiteeUser user = giteeProvider.getUser(accessToken);

 //验证信息
 System.out.println(user.getName()+""+user.getBio()+" "+user.getId());

 return "index";
}
}
</code></pre> 
来源：https://www.cnblogs.com/13490-/p/15982491.html

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实现Gitee的第三方登录笔记