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