在Java中对调用Google云函数的客户端进行身份验证

import com.google.auth.oauth2.GoogleCredentials;
import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import com.google.gson.Gson;
import com.google.gson.JsonObject;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class MyFunction {
    private static final Logger logger = Logger.getLogger(MyFunction.class.getName());

    public void authenticate(HttpRequest request, HttpResponse response) throws IOException {
        // 读取Google Cloud服务账号的凭据文件
        GoogleCredentials credentials = ServiceAccountCredentials.fromStream(
                getClass().getResourceAsStream("/path/to/credentials.json"));

        // 使用凭据初始化Google Cloud IAM客户端
        try {
            credentials.refresh();
        } catch (IOException e) {
            logger.log(Level.SEVERE, "Failed to refresh credentials", e);
            response.setStatusCode(500);
            return;
        }

        // 进行身份验证逻辑
        // ...

        // 返回身份验证结果
        JsonObject json = new JsonObject();
        json.addProperty("authenticated", true);
        response.getWriter().write(new Gson().toJson(json));
    }
}