var AWS = require('../core'); require('../dynamodb/document_client'); AWS.util.update(AWS.DynamoDB.prototype, { /** * @api private */ setupRequestListeners: function setupRequestListeners(request) { if (request.service.config.dynamoDbCrc32) { request.removeListener('extractData', AWS.EventListeners.Json.EXTRACT_DATA); request.addListener('extractData', this.checkCrc32); request.addListener('extractData', AWS.EventListeners.Json.EXTRACT_DATA); } }, /** * @api private */ checkCrc32: function checkCrc32(resp) { if (!resp.httpResponse.streaming && !resp.request.service.crc32IsValid(resp)) { resp.data = null; resp.error = AWS.util.error(new Error(), { code: 'CRC32CheckFailed', message: 'CRC32 integrity check failed', retryable: true }); resp.request.haltHandlersOnError(); throw (resp.error); } }, /** * @api private */ crc32IsValid: function crc32IsValid(resp) { var crc = resp.httpResponse.headers['x-amz-crc32']; if (!crc) return true; // no (valid) CRC32 header return parseInt(crc, 10) === AWS.util.crypto.crc32(resp.httpResponse.body); }, /** * @api private */ defaultRetryCount: 10, /** * @api private */ retryDelays: function retryDelays(retryCount) { var retryDelayOptions = AWS.util.copy(this.config.retryDelayOptions); if (typeof retryDelayOptions.base !== 'number') { retryDelayOptions.base = 50; // default for dynamodb } var delay = AWS.util.calculateRetryDelay(retryCount, retryDelayOptions); return delay; } });