Backend half

SerpentRace_Backend/node_modules/aws-sdk/lib/publisher/configuration.js

@@ -0,0 +1,82 @@
+var AWS = require('../core');
+
+/**
+ * Resolve client-side monitoring configuration from either environmental variables
+ * or shared config file. Configurations from environmental variables have higher priority
+ * than those from shared config file. The resolver will try to read the shared config file
+ * no matter whether the AWS_SDK_LOAD_CONFIG variable is set.
+ * @api private
+ */
+function resolveMonitoringConfig() {
+  var config = {
+    port: undefined,
+    clientId: undefined,
+    enabled: undefined,
+    host: undefined
+  };
+  if (fromEnvironment(config) || fromConfigFile(config)) return toJSType(config);
+  return toJSType(config);
+}
+
+/**
+ * Resolve configurations from environmental variables.
+ * @param {object} client side monitoring config object needs to be resolved
+ * @returns {boolean} whether resolving configurations is done
+ * @api private
+ */
+function fromEnvironment(config) {
+  config.port = config.port || process.env.AWS_CSM_PORT;
+  config.enabled = config.enabled || process.env.AWS_CSM_ENABLED;
+  config.clientId = config.clientId || process.env.AWS_CSM_CLIENT_ID;
+  config.host = config.host || process.env.AWS_CSM_HOST;
+  return config.port && config.enabled && config.clientId && config.host ||
+    ['false', '0'].indexOf(config.enabled) >= 0; //no need to read shared config file if explicitely disabled
+}
+
+/**
+ * Resolve cofigurations from shared config file with specified role name
+ * @param {object} client side monitoring config object needs to be resolved
+ * @returns {boolean} whether resolving configurations is done
+ * @api private
+ */
+function fromConfigFile(config) {
+  var sharedFileConfig;
+  try {
+    var configFile = AWS.util.iniLoader.loadFrom({
+      isConfig: true,
+      filename: process.env[AWS.util.sharedConfigFileEnv]
+    });
+    var sharedFileConfig = configFile[
+      process.env.AWS_PROFILE || AWS.util.defaultProfile
+    ];
+  } catch (err) {
+    return false;
+  }
+  if (!sharedFileConfig) return config;
+  config.port = config.port || sharedFileConfig.csm_port;
+  config.enabled = config.enabled || sharedFileConfig.csm_enabled;
+  config.clientId = config.clientId || sharedFileConfig.csm_client_id;
+  config.host = config.host || sharedFileConfig.csm_host;
+  return config.port && config.enabled && config.clientId && config.host;
+}
+
+/**
+ * Transfer the resolved configuration value to proper types: port as number, enabled
+ * as boolean and clientId as string. The 'enabled' flag is valued to false when set
+ * to 'false' or '0'.
+ * @param {object} resolved client side monitoring config
+ * @api private
+ */
+function toJSType(config) {
+    //config.XXX is either undefined or string
+  var falsyNotations = ['false', '0', undefined];
+  if (!config.enabled || falsyNotations.indexOf(config.enabled.toLowerCase()) >= 0) {
+    config.enabled = false;
+  } else {
+    config.enabled = true;
+  }
+  config.port = config.port ? parseInt(config.port, 10) : undefined;
+  return config;
+}
+
+module.exports = resolveMonitoringConfig;