Question

我是AWS的初学者，我对连接AWS API端点有不明确的要点。我无法从Java客户端访问AWS API端点。每次都失败了。

我知道为什么连接失败了吗？

我可以参考哪些源代码吗？

public interface LamdaInterface {

    @LambdaFunction(functionName="GetCategoryAction")
    public List<LamdaOutput> getAllCategory(LamdaInput input);

}

public class LamdaTest {

public static void main(String[] args) {
    AWSCredentials credentails = new AWSCredentials() {

        @Override
        public String getAWSSecretKey() {
            // my aws secret key
            return "xxxx";
        }

        @Override
        public String getAWSAccessKeyId() {
            // my aws access key Id
            return "xxx";
        }
    };

    AWSLambdaClient lambda = new AWSLambdaClient(credentails);
    lambda.configureRegion(Regions.AP_NORTHEAST_1);
    lambda.setEndpoint("https://xxx.execute-api.ap-northeast-1.amazonaws.com/prod/listall");

    LamdaInterface service = LambdaInvokerFactory.build(LamdaInterface.class, lambda);
    System.out.println("Calling...");
    List<LamdaOutput> list = service.getAllCategory(new LamdaInput());
    System.out.println("list : " + list);
    for (LamdaOutput l : list) {
        System.out.println("Name : " + l.getName());
    }
}

}

此错误导致失败。

Calling...


Exception in thread "main" com.amazonaws.AmazonClientException: Unable to execute HTTP request: Connection timed out: connect  
    at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:642)    
    at com.amazonaws.http.AmazonHttpClient.doExecute(AmazonHttpClient.java:400)    
    at com.amazonaws.http.AmazonHttpClient.executeWithTimer(AmazonHttpClient.java:362) 
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:311)  
    at com.amazonaws.services.lambda.AWSLambdaClient.invoke(AWSLambdaClient.java:1925) 
    at com.amazonaws.services.lambda.AWSLambdaClient.invoke(AWSLambdaClient.java:1029) 
    at com.amazonaws.services.lambda.invoke.LambdaInvokerFactory$LambdaInvocationHandler.invoke(LambdaInvokerFactory.java:121) 
    at com.sun.proxy.$Proxy7.getAllCategory(Unknown Source)    
    at testPrj.LamdaTest.main(LamdaTest.java:43) Caused by: java.net.ConnectException: Connection timed out: connect

即使我尝试从浏览器连接，它也失败了。这是GET请求所以我不需要传递任何请求参数。

https://xxx.execute-api.ap-northeast-1.amazonaws.com/prod/listall

Error is : **{"message":"Missing Authentication Token"}**

Answer 1

看起来您正在尝试在您设置为端点的URL处调用lambda函数。端点是 API客户端发送API调用的位置。它与您浏览调用lambda的位置无关。这里列出了有效的lambda端点：http://docs.aws.amazon.com/general/latest/gr/rande.html#lambda_region。顺便提一下，您应该设置端点，或者调用setRegion / configureRegion，但不能同时调用两者。

要调用lambda，请使用com.amazonaws.services.lambda.AWSLambdaClient上的invoke() API调用或AWS CLI（aws lambda invoke --function-name GetCategoryAction）。

如果您想让您的lambda在网络上作为API访问，您可能需要查看Amazon API网关服务。

如何通过java

1 个答案: