private AmazonS3Exception createExceptionFromHeaders( HttpResponse errorResponse, String errorResponseXml) { final Map<String, String> headers = errorResponse.getHeaders(); final int statusCode = errorResponse.getStatusCode(); final AmazonS3ExceptionBuilder exceptionBuilder = new AmazonS3ExceptionBuilder(); exceptionBuilder.setErrorMessage(errorResponse.getStatusText()); exceptionBuilder.setErrorResponseXml(errorResponseXml); exceptionBuilder.setStatusCode(statusCode); exceptionBuilder.setExtendedRequestId(headers.get(Headers.EXTENDED_REQUEST_ID)); exceptionBuilder.setRequestId(headers.get(Headers.REQUEST_ID)); exceptionBuilder.setErrorCode(statusCode + " " + errorResponse.getStatusText()); exceptionBuilder.addAdditionalDetail( Headers.S3_BUCKET_REGION, errorResponse.getHeaders().get(Headers.S3_BUCKET_REGION)); return exceptionBuilder.build(); }
@Override public AmazonServiceException handle(HttpResponse httpResponse) throws XMLStreamException { final InputStream is = httpResponse.getContent(); String xmlContent = null; /* * We don't always get an error response body back from S3. When we send * a HEAD request, we don't receive a body, so we'll have to just return * what we can. */ if (is == null || httpResponse.getRequest().getHttpMethod() == HttpMethodName.HEAD) { return createExceptionFromHeaders(httpResponse, null); } String content = null; try { content = IOUtils.toString(is); } catch (IOException ioe) { if (log.isDebugEnabled()) log.debug("Failed in parsing the error response : ", ioe); return createExceptionFromHeaders(httpResponse, null); } /* * XMLInputFactory is not thread safe and hence it is synchronized. * Reference : * http://itdoc.hitachi.co.jp/manuals/3020/30203Y2210e/EY220140.HTM */ XMLStreamReader reader; synchronized (xmlInputFactory) { reader = xmlInputFactory.createXMLStreamReader(new ByteArrayInputStream(content.getBytes(UTF8))); } try { /* * target depth is to determine if the XML Error response from the * server has any element inside <Error> tag have child tags. * Parsing such tags is not supported now. target depth is * incremented for every start tag and decremented after every end * tag is encountered. */ int targetDepth = 0; final AmazonS3ExceptionBuilder exceptionBuilder = new AmazonS3ExceptionBuilder(); exceptionBuilder.setErrorResponseXml(content); exceptionBuilder.setStatusCode(httpResponse.getStatusCode()); boolean hasErrorTagVisited = false; while (reader.hasNext()) { int event = reader.next(); switch (event) { case XMLStreamConstants.START_ELEMENT: targetDepth++; String tagName = reader.getLocalName(); if (targetDepth == 1 && !S3ErrorTags.Error.toString().equals(tagName)) return createExceptionFromHeaders( httpResponse, "Unable to parse error response. Error XML Not in proper format." + content); if (S3ErrorTags.Error.toString().equals(tagName)) { hasErrorTagVisited = true; } continue; case XMLStreamConstants.CHARACTERS: xmlContent = reader.getText(); if (xmlContent != null) xmlContent = xmlContent.trim(); continue; case XMLStreamConstants.END_ELEMENT: tagName = reader.getLocalName(); targetDepth--; if (!(hasErrorTagVisited) || targetDepth > 1) { return createExceptionFromHeaders( httpResponse, "Unable to parse error response. Error XML Not in proper format." + content); } if (S3ErrorTags.Message.toString().equals(tagName)) { exceptionBuilder.setErrorMessage(xmlContent); } else if (S3ErrorTags.Code.toString().equals(tagName)) { exceptionBuilder.setErrorCode(xmlContent); } else if (S3ErrorTags.RequestId.toString().equals(tagName)) { exceptionBuilder.setRequestId(xmlContent); } else if (S3ErrorTags.HostId.toString().equals(tagName)) { exceptionBuilder.setExtendedRequestId(xmlContent); } else { exceptionBuilder.addAdditionalDetail(tagName, xmlContent); } continue; case XMLStreamConstants.END_DOCUMENT: return exceptionBuilder.build(); } } } catch (Exception e) { if (log.isDebugEnabled()) log.debug("Failed in parsing the error response : " + content, e); } return createExceptionFromHeaders(httpResponse, content); }