上海公安数据库是怎样泄露的？

程序员在技术博文里泄露了访问密钥：

// Endpoint以Region: 华东1为例，其他Region请按实际情况填写
String endpoint = "https://datahub.cn-shanghai-shga-d01.dh.alicloud.ga.sh";
String accessId = "0iWV0NCs805VuAAu";
String accessKey = "iEwlgpCnXDwT93YMVDb2G60my9ne81";
String projectName = "sjc_rwzx";
String topicName = "task_center_platform_request";
RecordSchema schema = new RecordSchema();

https://archive.ph/mP3bh