掘金社区自动签到+免费抽奖

分析页面

首先所有的自动化都是拟人操作，只需要模拟出正常的签到步骤并定时重复即可满足需求。

获取登录状态

签到总要知道是哪个用户签的嘛，所以所有的请求都要带上用户登录标识，也就是在header中添加对应的cookie
如何获取cookie呢，这里看了下掘金的登录请求还比较麻烦，对熟悉爬虫的同学可能小菜一碟，对后端来说虽然能做但是本着投入时间与收益的原则，我毅然决然的选择绕过登录，直接拦截请求把request header的cookie复制出来。
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-hrACs4W2-1665316799526)(https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/88660b222a284cc18302a4679346a624~tplv-k3u1fbpfcp-zoom-1.image “image.png”)]

处理cookie失效

没有登录逻辑的话等cookie失效签到请求会返回请登录，这里话通过邮箱提醒更换cookie也是可以接受的

处理https请求

随便从网上找一个http方法即可

落地方案

为了快速满足直接用最熟悉的Java+SpringBoot撸出来个jar包，打开IDEA创建SpringBoot脚手架

创建脚手架

pom里直接引入springboot-web、springboot-mail、lombok、fastjson，版本管理直接继承下spring-boot-dependencies。

   <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>2.4.3</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.41</version></dependency></dependencies>

启动类上添加@EnableScheduling注解开启定时任务

@EnableScheduling
@SpringBootApplication
public class SignApplication {public static void main(String[] args) {SpringApplication.run(SignApplication.class, args);}
}

整体的骨架就这么简单。

通用http方法

 public static String commonReuqest(String url, String method, String cookie) throws Exception {URL serverUrl = new URL(url);HttpURLConnection conn = (HttpURLConnection) serverUrl.openConnection();conn.setRequestMethod(method);conn.setRequestProperty("Content-type", "application/json");conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36");conn.setRequestProperty("Cookie", cookie);//必须设置false，否则会自动redirect到重定向后的地址conn.setInstanceFollowRedirects(false);conn.connect();String result = getReturn(conn);return result;}/*请求url获取返回的内容*/public static String getReturn(HttpURLConnection connection) throws IOException {StringBuffer buffer = new StringBuffer();//将返回的输入流转换成字符串try (InputStream inputStream = connection.getInputStream();InputStreamReader inputStreamReader = new InputStreamReader(inputStream);BufferedReader bufferedReader = new BufferedReader(inputStreamReader);) {String str = null;while ((str = bufferedReader.readLine()) != null) {buffer.append(str);}String result = buffer.toString();return result;}}

封装成一个util类，入口加上cookie即可，这里直接从网上找了个方法。

邮箱逻辑

如何开启smtp邮箱服务就不说了，这里直接贴一下教程https://blog.csdn.net/weixin_46822367/article/details/123893527
yml配置里需要配置上必要信息，授权码按照上述博客中的步骤获取。

spring:mail:host: smtp.qq.com#发送者邮箱username: #申请到的授权码password: #端口号465或587port: 587#默认的邮件编码为UTF-8default-encoding: UTF-8#其他参数properties:mail:#配置SSL 加密工厂smtp:ssl:#本地测试，先放开sslenable: falserequired: false#开启debug模式，这样邮件发送过程的日志会在控制台打印出来，方便排查错误debug: true

邮箱业务类


@Service
@Slf4j
public class SendMailServiceImpl implements SendMailService {@Autowiredprivate JavaMailSender javaMailSender;@Value("${spring.mail.username}")private String sendMailer;public void checkMail(MailRequest mailRequest) {Assert.notNull(mailRequest,"邮件请求不能为空");Assert.notNull(mailRequest.getSendTo(), "邮件收件人不能为空");Assert.notNull(mailRequest.getSubject(), "邮件主题不能为空");Assert.notNull(mailRequest.getText(), "邮件收件人不能为空");}@Overridepublic void sendMail(MailRequest mailRequest) {SimpleMailMessage message = new SimpleMailMessage();checkMail(mailRequest);//邮件发件人message.setFrom(sendMailer);//邮件收件人 1或多个message.setTo(mailRequest.getSendTo().split(","));//邮件主题message.setSubject(mailRequest.getSubject());//邮件内容message.setText(mailRequest.getText());//邮件发送时间message.setSentDate(new Date());//        JavaMailSender javaMailSender = new JavaMailSenderImpl();javaMailSender.send(message);log.info("发送邮件成功:{}->{}",sendMailer,mailRequest.getSendTo());}}

JavaMailSender为spring-boot-starter-mail依赖中封装好的业务类，yml中添加对应的配置该类会被注入到容器中。

签到请求

@Slf4j
@Service
public class ActionService {//签到public static final String CHECK_IN = "https://api.juejin.cn/growth_api/v1/check_in";//抽奖public static final String DRAW = "https://api.juejin.cn/growth_api/v1/lottery/draw";@Value("${spring.mail.username}")private String username;@AutowiredSendMailService sendMailService;/*** 签到*/public void checkIn(String cookie) throws Exception {String response = BaseRequest.commonReuqest(CHECK_IN, "POST", cookie);log.info("get result from juejin {}", response);Map<String, Object> resultMap = JSONObject.parseObject(response, Map.class);if((Integer) resultMap.get("err_no") != 0){log.error((String) resultMap.get("err_msg"));// 推送失败消息MailRequest mailRequest = new MailRequest();mailRequest.setText("掘金签到失败！err_msg: " + resultMap.get("err_msg"));mailRequest.setSendTo(username);mailRequest.setSubject("juejin sign");sendMailService.sendMail(mailRequest);}}/*** 抽奖*/public void draw(String cookie) throws Exception {String response = BaseRequest.commonReuqest(DRAW, "POST", cookie);DrawResponce data= JSON.parseObject(response,new TypeReference<DrawResponce>(){});log.info(response);}}

签到请求和抽奖请求都很简单没有参数，带上cookie发一下矿石就到账了，每天第一次抽奖不花矿石，默认第一次抽一下。签到成功就不发邮箱了发多了烦，签到失败会把失败原因发送到配置的邮箱内。

实体类

@NoArgsConstructor
@Data
public class DrawResponce {@JsonProperty("err_no")private Integer errNo;@JsonProperty("err_msg")private String errMsg;@JsonProperty("data")private DataDTO data;@NoArgsConstructor@Datapublic static class DataDTO {@JsonProperty("id")private Integer id;@JsonProperty("lottery_id")private String lotteryId;@JsonProperty("lottery_name")private String lotteryName;@JsonProperty("lottery_type")private Integer lotteryType;@JsonProperty("lottery_image")private String lotteryImage;@JsonProperty("history_id")private String historyId;}
}

@Data
public class MailRequest implements Serializable {/*** 接收人*/private String sendTo;/***  邮件主题*/private String subject;/***  邮件内容*/private String text;/***  附件路径*/private String filePath;
}

@Configuration
@ConfigurationProperties(prefix = "uptown")
@Data
public class Users {List<String> cookies;
}

定时任务

@Slf4j
@Component
public class task {@Value("${uptown.cookie}")String cookie;@ResourceActionService actionService;@Scheduled(cron = "0 0 5 * * ?")public void run() throws Exception {log.info("{} start!", new SimpleDateFormat("yyyy-MM-dd").format(new Date()));this.actionService.checkIn(cookie);// 第一次免费抽奖this.actionService.draw(cookie);}
}

最后加上定时任务就完事了，每天5点签到，签到失败发邮箱提醒。用maven打个包放到服务器上nohup java -jar *.jar &

只需要半小时就可以往后只需要通过邮箱提醒处理cookie失效或失败的情况。