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