如何在AmazoneWebServiceRequest上设置JSON有效负载

Question

我正在使用AmazonHttpClient＆amp; AmazonWebServiceRequest从Android应用程序向API网关发出http请求。 requestBody是一个JSON字符串，而DefaultRequest似乎只接受InputStream作为内容。

final AmazonWebServiceRequest awsRequest = new AmazonWebServiceRequest() {};
final Request request = new DefaultRequest(awsRequest, UtilConstants.API_GATEWAY_SERVICE_NAME);
request.setEndpoint(uri);
request.setHttpMethod(requestType);
request.addHeader(HttpHeader.CONTENT_TYPE, "application/json");
final InputStream stream = new ByteArrayInputStream(requestBody.getBytes(StandardCharsets.UTF_8));
request.setContent(stream);

当我提出请求时，我得到了异常

Caused by: com.amazonaws.AmazonClientException: Unable to execute HTTP request: expected 0 bytes but received 38

Answer 1

添加HttpHeader.CONTENT_LENGTH标题解决了这个问题。