Question

在我打电话给我的弹性搜索服务签署请求时，我仍然无法理解如何阅读AWS响应的内容。似乎流被消耗在某个地方。例如，我可以将响应内容打印为字符串的唯一方法是在ResponseHandler中。我正在使用Amazon AWS Java SDK 1.11.170。

AmazonHttpClient client = new AmazonHttpClient(new ClientConfiguration());

Response<Void> response = client
        .requestExecutionBuilder()
        .request(request)
        //.errorResponseHandler(errorHandler)
        .executionContext(context)
        //.execute(responseHandler)
        .execute()
;

System.out.println("response = " + convertStreamToString(response.getHttpResponse().getContent()));

此代码分解并说：

java.io.IOException: Attempted read from closed stream.

有没有办法在请求执行后和响应处理程序之外保持流打开？

Answer 1

Eventually found the solution perusing this github issue. I had to use the right response handler. Here it is:

public class StringResponseHandler implements HttpResponseHandler<AmazonWebServiceResponse<String>> {

    @Override
    public AmazonWebServiceResponse<String> handle(com.amazonaws.http.HttpResponse response) throws IOException {

        AmazonWebServiceResponse<String> awsResponse = new AmazonWebServiceResponse<>();

        //putting response string in the result, available outside the handler
        awsResponse.setResult((String) IOUtils.toString(response.getContent()));

        return awsResponse;
    }

    @Override
    public boolean needsConnectionLeftOpen() {
        return false;
    }

}

And then in the caller:

AmazonHttpClient client = new AmazonHttpClient(new ClientConfiguration());

Response<AmazonWebServiceResponse<String>> response = client
        .requestExecutionBuilder()
        .request(request)
        .executionContext(context)
        .execute(new StringResponseHandler()) //note the new handler
        .execute()
;

//print the result (string expected)
System.out.println("aws response result = " + response.getAwsResponse().getResult();

If you want to go with third party libs, you can use Jest client plugged with Jest AWS signer

避免阅读使用AWS Response的封闭流

1 个答案: