在 java aws lamba 中使用 rest temple 调用另一个 3rd party rest api 时连接超时

Question

我正在尝试使用 aws lambda 中的休息模板调用第 3 方休息 api，但发生连接超时。这个第三方 api 在邮递员中工作正常。下面是代码片段

@Override
public APIGatewayProxyResponseEvent apply(APIGatewayProxyRequestEvent request) {
    Gson gson = new Gson();
    EmailRequest emailRequest = gson.fromJson(request.getBody(),EmailRequest.class);
    System.out.println("Inside function");
    APIGatewayProxyResponseEvent responseEvent = new APIGatewayProxyResponseEvent();
    if(emailRequest!=null && emailRequest.getUserId() !=null && emailRequest.getPid()!=null) {
        Optional<UserDetail> userDetail = userRepository.findById(emailRequest.getUserId());
        Optional<Prospect> prospect = prospectRepository.findById(emailRequest.getPid());
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
        HttpEntity<Prospect> entity = new HttpEntity<>(prospect.get(), httpHeaders);
        try {
            ResponseEntity<String> result = restTemplate.postForEntity(userDetail.get().getCrmUrl(), entity, String.class);
            if(result.getStatusCode().is5xxServerError()) {
                responseEvent.setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR.value());
                responseEvent.withBody("Issue while sending email details");
            }
            responseEvent.setStatusCode(HttpStatus.OK.value());
        } catch (ResourceAccessException e) {
            responseEvent.setStatusCode(HttpStatus.GATEWAY_TIMEOUT.value());
            responseEvent.withBody("Rest templete time out");
            return responseEvent;
        }

        responseEvent.setStatusCode(HttpStatus.OK.value());
        responseEvent.withBody("UserId crm : " + userDetail.get().getCrmUrl() +" and Prospect first name : " + prospect.get().getFirstName());
    } else {
        responseEvent.setStatusCode(HttpStatus.BAD_REQUEST.value());
        responseEvent.withBody("Please check the request data");
    }
    return responseEvent;
}

请帮助我如何在 aws lambda 中访问第三方 rest api。

Answer 1

这可能是因为 VPC 中的 lambda 函数默认无法访问互联网。来自 docs:

When you connect a function to a VPC in your account, the function can't access the internet unless your VPC provides access.

克服此问题的一种流行方法是通过 NAT 网关 和 私有子网，如以下所述：

How do I give internet access to a Lambda function that's connected to an Amazon VPC?

在 java aws lamba 中使用 rest temple 调用另一个 3rd party rest api 时连接超时

connection timeout while calling another 3rd party rest api using rest temple in java aws lamba

java

amazon-web-services

resttemplate

spring-boot

aws-lambda