Backend half

SerpentRace_Backend/node_modules/aws-sdk/lib/services/dynamodb.js

@@ -0,0 +1,58 @@
+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, err) {
+    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, err);
+    return delay;
+  }
+});