945 lines
17 KiB
JavaScript
945 lines
17 KiB
JavaScript
/*!
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* config.js - configuration parsing for bcoin
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* Copyright (c) 2016-2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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const assert = require('assert');
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const path = require('path');
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const os = require('os');
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const fs = require('../utils/fs');
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const HOME = os.homedir ? os.homedir() : '/';
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/**
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* Config Parser
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* @alias module:node.Config
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* @constructor
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* @param {String} module - Module name (e.g. `bcoin`).
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*/
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function Config(module) {
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if (!(this instanceof Config))
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return new Config(module);
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assert(typeof module === 'string');
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assert(module.length > 0);
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this.module = module;
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this.network = 'main';
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this.prefix = path.join(HOME, '.' + module);
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this.options = Object.create(null);
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this.data = Object.create(null);
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this.env = Object.create(null);
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this.args = Object.create(null);
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this.argv = [];
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this.query = Object.create(null);
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this.hash = Object.create(null);
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}
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/**
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* Option name aliases.
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* @const {Object}
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*/
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Config.alias = {
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conf: {},
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env: {
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'seed': 'seeds',
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'node': 'nodes'
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},
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arg: {
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'seed': 'seeds',
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'node': 'nodes',
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'n': 'network'
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}
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};
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/**
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* Inject options.
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* @param {Object} options
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*/
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Config.prototype.inject = function inject(options) {
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let keys = Object.keys(options);
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for (let key of keys) {
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let value = options[key];
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switch (key) {
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case 'hash':
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case 'query':
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case 'env':
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case 'argv':
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case 'config':
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continue;
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}
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this.set(key, value);
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}
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};
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/**
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* Load options from hash, query, env, or args.
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* @param {Object} options
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*/
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Config.prototype.load = function load(options) {
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if (options.hash)
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this.parseHash(options.hash);
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if (options.query)
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this.parseQuery(options.query);
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if (options.env)
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this.parseEnv(options.env);
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if (options.argv)
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this.parseArg(options.argv);
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this.network = this.getNetwork();
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this.prefix = this.getPrefix();
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};
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/**
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* Open a config file.
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* @param {String} file - e.g. `bcoin.conf`.
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* @throws on IO error
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*/
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Config.prototype.open = function open(file) {
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let path, text;
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if (fs.unsupported)
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return;
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path = this.getFile(file);
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try {
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text = fs.readFileSync(path, 'utf8');
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} catch (e) {
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if (e.code === 'ENOENT')
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return;
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throw e;
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}
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this.parseConfig(text);
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this.network = this.getNetwork();
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this.prefix = this.getPrefix();
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};
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/**
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* Set default option.
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* @param {String} key
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* @param {Object} value
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*/
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Config.prototype.set = function set(key, value) {
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assert(typeof key === 'string', 'Key must be a string.');
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if (value == null)
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return;
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key = key.toLowerCase().replace(/-/g, '');
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this.options[key] = value;
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};
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/**
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* Test whether a config option is present.
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* @param {String} key
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* @returns {Boolean}
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*/
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Config.prototype.has = function has(key) {
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if (typeof key === 'number') {
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assert(key >= 0, 'Index must be positive.');
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if (key >= this.argv.length)
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return false;
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return true;
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}
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assert(typeof key === 'string', 'Key must be a string.');
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key = key.toLowerCase().replace(/-/g, '');
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if (this.hash[key] != null)
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return true;
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if (this.query[key] != null)
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return true;
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if (this.args[key] != null)
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return true;
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if (this.env[key] != null)
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return true;
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if (this.data[key] != null)
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return true;
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if (this.options[key] != null)
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return true;
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return false;
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};
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/**
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* Get a config option.
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Object|null}
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*/
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Config.prototype.get = function get(key, fallback) {
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let keys, value;
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if (fallback === undefined)
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fallback = null;
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if (Array.isArray(key)) {
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keys = key;
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for (let key of keys) {
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value = this.get(key);
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if (value !== null)
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return value;
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}
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return fallback;
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}
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if (typeof key === 'number') {
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assert(key >= 0, 'Index must be positive.');
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if (key >= this.argv.length)
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return fallback;
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return this.argv[key];
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}
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assert(typeof key === 'string', 'Key must be a string.');
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key = key.toLowerCase().replace(/-/g, '');
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if (this.hash[key] != null)
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return this.hash[key];
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if (this.query[key] != null)
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return this.query[key];
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if (this.args[key] != null)
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return this.args[key];
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if (this.env[key] != null)
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return this.env[key];
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if (this.data[key] != null)
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return this.data[key];
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if (this.options[key] != null)
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return this.options[key];
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return fallback;
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};
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/**
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* Get a config option (as a string).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {String|null}
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*/
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Config.prototype.str = function str(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string')
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throw new Error(key + ' must be a string.');
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return value;
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};
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/**
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* Get a config option (as a number).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Number|null}
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*/
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Config.prototype.num = function num(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (typeof value !== 'number')
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throw new Error(key + ' must be a positive integer.');
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return value;
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}
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if (!/^\d+$/.test(value))
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throw new Error(key + ' must be a positive integer.');
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value = parseInt(value, 10);
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if (!isFinite(value))
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throw new Error(key + ' must be a positive integer.');
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return value;
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};
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/**
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* Get a config option (as a float).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Number|null}
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*/
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Config.prototype.flt = function flt(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (typeof value !== 'number')
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throw new Error(key + ' must be a float.');
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return value;
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}
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if (!/^\d*(?:\.\d*)?$/.test(value))
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throw new Error(key + ' must be a float.');
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value = parseFloat(value);
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if (!isFinite(value))
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throw new Error(key + ' must be a float.');
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return value;
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};
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/**
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* Get a value (as a satoshi number or btc string).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Number|null}
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*/
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Config.prototype.amt = function amt(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (typeof value !== 'number')
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throw new Error(key + ' must be an amount.');
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return value;
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}
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if (!/^\d+(\.\d{0,8})?$/.test(value))
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throw new Error(key + ' must be an amount.');
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value = parseFloat(value);
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if (!isFinite(value))
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throw new Error(key + ' must be an amount.');
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value *= 1e8;
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if (value % 1 !== 0 || value < 0 || value > 0x1fffffffffffff)
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throw new Error(key + ' must be an amount (uint64).');
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return value;
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};
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/**
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* Get a config option (as a boolean).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Boolean|null}
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*/
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Config.prototype.bool = function bool(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (typeof value !== 'boolean')
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throw new Error(key + ' must be a boolean.');
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return value;
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}
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if (value === 'true' || value === '1')
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return true;
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if (value === 'false' || value === '0')
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return false;
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throw new Error(key + ' must be a boolean.');
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};
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/**
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* Get a config option (as a buffer).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Buffer|null}
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*/
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Config.prototype.buf = function buf(key, fallback) {
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let value = this.get(key);
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let data;
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (!Buffer.isBuffer(value))
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throw new Error(key + ' must be a buffer.');
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return value;
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}
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data = Buffer.from(value, 'hex');
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if (data.length !== value.length / 2)
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throw new Error(key + ' must be a hex string.');
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return data;
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};
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/**
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* Get a config option (as an array of strings).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {String[]|null}
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*/
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Config.prototype.array = function array(key, fallback) {
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let value = this.get(key);
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let result, parts;
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (typeof value !== 'string') {
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if (!Array.isArray(value))
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throw new Error(key + ' must be an array.');
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return value;
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}
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parts = value.trim().split(/\s*,\s*/);
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result = [];
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for (let part of parts) {
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if (part.length === 0)
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continue;
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result.push(part);
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}
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return result;
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};
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/**
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* Get a config option (as an object).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Object|null}
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*/
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Config.prototype.obj = function obj(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (!value || typeof value !== 'object')
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throw new Error(key + ' must be an object.');
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return value;
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};
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/**
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* Get a config option (as a function).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Function|null}
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*/
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Config.prototype.func = function func(key, fallback) {
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let value = this.get(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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if (!value || typeof value !== 'function')
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throw new Error(key + ' must be a function.');
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return value;
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};
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/**
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* Get a config option (as a string).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {String|null}
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*/
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Config.prototype.path = function _path(key, fallback) {
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let value = this.str(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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switch (value[0]) {
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case '~': // home dir
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value = path.join(HOME, value.substring(1));
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break;
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case '@': // prefix
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value = path.join(this.prefix, value.substring(1));
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break;
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default: // cwd
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break;
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}
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return path.normalize(value);
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};
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/**
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* Get a config option (in MB).
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* @param {String} key
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* @param {Object?} fallback
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* @returns {Number|null}
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*/
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Config.prototype.mb = function mb(key, fallback) {
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let value = this.num(key);
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if (fallback === undefined)
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fallback = null;
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if (value === null)
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return fallback;
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return value * 1024 * 1024;
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};
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|
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/**
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* Grab network type from config data.
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* @private
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* @returns {String}
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*/
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Config.prototype.getNetwork = function getNetwork() {
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let network = this.str('network');
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if (!network)
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network = 'main';
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assert(isAlpha(network), 'Bad network.');
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return network;
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};
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|
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/**
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* Grab prefix from config data.
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* @private
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* @returns {String}
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*/
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|
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Config.prototype.getPrefix = function getPrefix() {
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let prefix = this.str('prefix');
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let network;
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if (prefix) {
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if (prefix[0] === '~')
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prefix = path.join(HOME, prefix.substring(1));
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return prefix;
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}
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prefix = path.join(HOME, '.' + this.module);
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network = this.str('network');
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if (network) {
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assert(isAlpha(network), 'Bad network.');
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if (network !== 'main')
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prefix = path.join(prefix, network);
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}
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return path.normalize(prefix);
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};
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|
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/**
|
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* Grab config filename from config data.
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* @private
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* @param {String} file
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* @returns {String}
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*/
|
|
|
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Config.prototype.getFile = function getFile(file) {
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let name = this.str('config');
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|
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if (name)
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return name;
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|
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return path.join(this.prefix, file);
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};
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|
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/**
|
|
* Ensure prefix.
|
|
* @returns {Promise}
|
|
*/
|
|
|
|
Config.prototype.ensure = function ensure() {
|
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if (fs.unsupported)
|
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return Promise.resolve();
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|
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return fs.mkdirp(this.prefix);
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};
|
|
|
|
/**
|
|
* Create a file path using `prefix`.
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|
* @param {String} file
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|
* @returns {String}
|
|
*/
|
|
|
|
Config.prototype.location = function location(file) {
|
|
return path.join(this.prefix, file);
|
|
};
|
|
|
|
/**
|
|
* Parse config text.
|
|
* @private
|
|
* @param {String} text
|
|
*/
|
|
|
|
Config.prototype.parseConfig = function parseConfig(text) {
|
|
let parts;
|
|
|
|
assert(typeof text === 'string', 'Config must be text.');
|
|
|
|
text = text.trim();
|
|
parts = text.split(/\n+/);
|
|
|
|
for (let line of parts) {
|
|
let key, value, eq, col, alias;
|
|
|
|
line = line.trim();
|
|
|
|
if (line.length === 0)
|
|
continue;
|
|
|
|
if (/^\s*#/.test(line))
|
|
continue;
|
|
|
|
eq = line.indexOf('=');
|
|
col = line.indexOf(':');
|
|
|
|
if (col !== -1 && (col < eq || eq === -1))
|
|
eq = col;
|
|
|
|
if (eq === -1) {
|
|
key = line.trim();
|
|
value = '';
|
|
} else {
|
|
key = line.substring(0, eq).trim();
|
|
value = line.substring(eq + 1).trim();
|
|
}
|
|
|
|
key = key.replace(/\-/g, '').toLowerCase();
|
|
|
|
alias = Config.alias.conf[key];
|
|
if (alias)
|
|
key = alias;
|
|
|
|
if (key.length === 0)
|
|
continue;
|
|
|
|
if (value.length === 0)
|
|
continue;
|
|
|
|
this.data[key] = value;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Parse arguments.
|
|
* @private
|
|
* @param {Array?} argv
|
|
*/
|
|
|
|
Config.prototype.parseArg = function parseArg(argv) {
|
|
if (!argv || typeof argv !== 'object')
|
|
argv = process.argv;
|
|
|
|
assert(Array.isArray(argv));
|
|
|
|
for (let i = 2; i < argv.length; i++) {
|
|
let arg = argv[i];
|
|
let key, value, alias, equals;
|
|
|
|
assert(typeof arg === 'string');
|
|
|
|
if (arg.indexOf('--') === 0) {
|
|
// e.g. --opt
|
|
arg = arg.split('=');
|
|
key = arg[0];
|
|
|
|
if (arg.length > 1) {
|
|
// e.g. --opt=val
|
|
value = arg.slice(1).join('=').trim();
|
|
equals = true;
|
|
} else {
|
|
value = 'true';
|
|
equals = false;
|
|
}
|
|
|
|
key = key.replace(/\-/g, '');
|
|
|
|
if (key.length === 0)
|
|
continue;
|
|
|
|
if (value.length === 0)
|
|
continue;
|
|
|
|
alias = Config.alias.arg[key];
|
|
if (alias)
|
|
key = alias;
|
|
|
|
this.args[key] = value;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (arg[0] === '-') {
|
|
// e.g. -abc
|
|
arg = arg.substring(1);
|
|
|
|
for (key of arg) {
|
|
alias = Config.alias.arg[key];
|
|
if (alias)
|
|
key = alias;
|
|
this.args[key] = 'true';
|
|
equals = false;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
// e.g. foo
|
|
value = arg.trim();
|
|
|
|
if (value.length === 0)
|
|
continue;
|
|
|
|
if (key && !equals) {
|
|
this.args[key] = value;
|
|
key = null;
|
|
} else {
|
|
this.argv.push(value);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Parse environment variables.
|
|
* @private
|
|
* @param {Object?} env
|
|
* @returns {Object}
|
|
*/
|
|
|
|
Config.prototype.parseEnv = function parseEnv(env) {
|
|
let prefix = this.module;
|
|
let keys;
|
|
|
|
prefix = prefix.toUpperCase();
|
|
prefix = prefix.replace(/-/g, '_');
|
|
prefix += '_';
|
|
|
|
if (!env || typeof env !== 'object')
|
|
env = process.env;
|
|
|
|
assert(env && typeof env === 'object');
|
|
|
|
keys = Object.keys(env);
|
|
|
|
for (let key of keys) {
|
|
let value, alias;
|
|
|
|
if (key.indexOf(prefix) !== 0)
|
|
continue;
|
|
|
|
assert(typeof env[key] === 'string');
|
|
|
|
value = env[key].trim();
|
|
|
|
key = key.substring(prefix.length);
|
|
key = key.replace(/_/g, '').toLowerCase();
|
|
|
|
if (key.length === 0)
|
|
continue;
|
|
|
|
if (value.length === 0)
|
|
continue;
|
|
|
|
alias = Config.alias.env[key];
|
|
if (alias)
|
|
key = alias;
|
|
|
|
this.env[key] = value;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Parse uri querystring variables.
|
|
* @private
|
|
* @param {String} query
|
|
*/
|
|
|
|
Config.prototype.parseQuery = function parseQuery(query) {
|
|
if (typeof query !== 'string') {
|
|
if (!global.location)
|
|
return {};
|
|
|
|
query = global.location.search;
|
|
|
|
if (typeof query !== 'string')
|
|
return {};
|
|
}
|
|
|
|
return this.parseForm(query, this.query);
|
|
};
|
|
|
|
/**
|
|
* Parse uri hash variables.
|
|
* @private
|
|
* @param {String} hash
|
|
*/
|
|
|
|
Config.prototype.parseHash = function parseHash(hash) {
|
|
if (typeof hash !== 'string') {
|
|
if (!global.location)
|
|
return {};
|
|
|
|
hash = global.location.hash;
|
|
|
|
if (typeof hash !== 'string')
|
|
return {};
|
|
}
|
|
|
|
return this.parseForm(hash, this.hash);
|
|
};
|
|
|
|
/**
|
|
* Parse form-urlencoded variables.
|
|
* @private
|
|
* @param {String} query
|
|
*/
|
|
|
|
Config.prototype.parseForm = function parseForm(query, map) {
|
|
let parts;
|
|
|
|
assert(typeof query === 'string');
|
|
|
|
if (query.length === 0)
|
|
return;
|
|
|
|
if (query[0] === '?' || query[0] === '#')
|
|
query = query.substring(1);
|
|
|
|
parts = query.split('&');
|
|
|
|
for (let pair of parts) {
|
|
let index = pair.indexOf('=');
|
|
let key, value, alias;
|
|
|
|
if (index === -1) {
|
|
key = pair;
|
|
value = '';
|
|
} else {
|
|
key = pair.substring(0, index);
|
|
value = pair.substring(index + 1);
|
|
}
|
|
|
|
key = unescape(key);
|
|
key = key.replace(/\-/g, '').toLowerCase();
|
|
|
|
if (key.length === 0)
|
|
continue;
|
|
|
|
value = unescape(value);
|
|
|
|
if (value.length === 0)
|
|
continue;
|
|
|
|
alias = Config.alias.env[key];
|
|
if (alias)
|
|
key = alias;
|
|
|
|
map[key] = value;
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Helpers
|
|
*/
|
|
|
|
function unescape(str) {
|
|
try {
|
|
str = decodeURIComponent(str).replace(/\+/g, ' ');
|
|
} finally {
|
|
return str.replace(/\0/g, '');
|
|
}
|
|
}
|
|
|
|
function isAlpha(str) {
|
|
if (typeof str !== 'string')
|
|
return false;
|
|
|
|
if (!/^[a-z0-9]+$/.test(str))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Expose
|
|
*/
|
|
|
|
module.exports = Config;
|