Examples with CRC32ChecksumCalculatingInputStream com.amazonaws.util.CRC32ChecksumCalculatingInputStream used on opensource projects

Example 1 with CRC32ChecksumCalculatingInputStream

use of com.amazonaws.util.CRC32ChecksumCalculatingInputStream in project aws-sdk-android by aws-amplify.

the class JsonResponseHandler method handle.

/**
 * @see com.amazonaws.http.HttpResponseHandler#handle(com.amazonaws.http.HttpResponse)
 */
@Override
public AmazonWebServiceResponse<T> handle(HttpResponse response) throws Exception {
    log.trace("Parsing service response JSON");
    final String crc32Checksum = response.getHeaders().get("x-amz-crc32");
    // Get the raw content input stream to calculate the crc32 checksum on
    // gzipped data.
    InputStream content = response.getRawContent();
    if (content == null) {
        // An empty input stream to avoid NPE
        content = new ByteArrayInputStream("{}".getBytes(StringUtils.UTF8));
    }
    log.debug("CRC32Checksum = " + crc32Checksum);
    log.debug("content encoding = " + response.getHeaders().get("Content-Encoding"));
    boolean isGzipEncoded = "gzip".equals(response.getHeaders().get("Content-Encoding"));
    CRC32ChecksumCalculatingInputStream checksumCalculatingInputStream = null;
    // encoded, no checksum) is already handled: we'll just operate on the raw content stream.
    if (crc32Checksum != null) {
        checksumCalculatingInputStream = new CRC32ChecksumCalculatingInputStream(content);
        content = checksumCalculatingInputStream;
    }
    if (isGzipEncoded) {
        content = new GZIPInputStream(content);
    }
    final AwsJsonReader jsonReader = JsonUtils.getJsonReader(new InputStreamReader(content, StringUtils.UTF8));
    try {
        final AmazonWebServiceResponse<T> awsResponse = new AmazonWebServiceResponse<T>();
        final JsonUnmarshallerContext unmarshallerContext = new JsonUnmarshallerContext(jsonReader, response);
        final T result = responseUnmarshaller.unmarshall(unmarshallerContext);
        if (checksumCalculatingInputStream != null) {
            final long serverSideCRC = Long.parseLong(crc32Checksum);
            final long clientSideCRC = checksumCalculatingInputStream.getCRC32Checksum();
            if (clientSideCRC != serverSideCRC) {
                throw new CRC32MismatchException("Client calculated crc32 checksum didn't match that calculated by server side");
            }
        }
        awsResponse.setResult(result);
        final Map<String, String> metadata = new HashMap<String, String>();
        metadata.put(ResponseMetadata.AWS_REQUEST_ID, response.getHeaders().get("x-amzn-RequestId"));
        awsResponse.setResponseMetadata(new ResponseMetadata(metadata));
        log.trace("Done parsing service response");
        return awsResponse;
    } finally {
        if (!needsConnectionLeftOpen) {
            try {
                jsonReader.close();
            } catch (final IOException e) {
                log.warn("Error closing json parser", e);
            }
        }
    }
}