lepu-test-platform-web/node_modules/http-proxy-middleware/lib/config-factory.js

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var _ = require('lodash')
var url = require('url')
var ERRORS = require('./errors')
var logger = require('./logger').getInstance()
module.exports = {
createConfig: createConfig
}
function createConfig(context, opts) {
// structure of config object to be returned
var config = {
context: undefined,
options: {}
}
// app.use('/api', proxy({target:'http://localhost:9000'}));
if (isContextless(context, opts)) {
config.context = '/'
config.options = _.assign(config.options, context)
// app.use('/api', proxy('http://localhost:9000'));
// app.use(proxy('http://localhost:9000/api'));
} else if (isStringShortHand(context)) {
var oUrl = url.parse(context)
var target = [oUrl.protocol, '//', oUrl.host].join('')
config.context = oUrl.pathname || '/'
config.options = _.assign(config.options, { target: target }, opts)
if (oUrl.protocol === 'ws:' || oUrl.protocol === 'wss:') {
config.options.ws = true
}
// app.use('/api', proxy({target:'http://localhost:9000'}));
} else {
config.context = context
config.options = _.assign(config.options, opts)
}
configureLogger(config.options)
if (!config.options.target) {
throw new Error(ERRORS.ERR_CONFIG_FACTORY_TARGET_MISSING)
}
// Legacy option.proxyHost
config.options = mapLegacyProxyHostOption(config.options)
// Legacy option.proxyTable > option.router
config.options = mapLegacyProxyTableOption(config.options)
return config
}
/**
* Checks if a String only target/config is provided.
* This can be just the host or with the optional path.
*
* @example
* app.use('/api', proxy('http://localhost:9000'));
app.use(proxy('http://localhost:9000/api'));
*
* @param {String} context [description]
* @return {Boolean} [description]
*/
function isStringShortHand(context) {
if (_.isString(context)) {
return !!url.parse(context).host
}
}
/**
* Checks if a Object only config is provided, without a context.
* In this case the all paths will be proxied.
*
* @example
* app.use('/api', proxy({target:'http://localhost:9000'}));
*
* @param {Object} context [description]
* @param {*} opts [description]
* @return {Boolean} [description]
*/
function isContextless(context, opts) {
return _.isPlainObject(context) && _.isEmpty(opts)
}
function mapLegacyProxyHostOption(options) {
// set options.headers.host when option.proxyHost is provided
if (options.proxyHost) {
logger.warn('*************************************')
logger.warn('[HPM] Deprecated "option.proxyHost"')
logger.warn(
' Use "option.changeOrigin" or "option.headers.host" instead'
)
logger.warn(' "option.proxyHost" will be removed in future release.')
logger.warn('*************************************')
options.headers = options.headers || {}
options.headers.host = options.proxyHost
}
return options
}
// Warn deprecated proxyTable api usage
function mapLegacyProxyTableOption(options) {
if (options.proxyTable) {
logger.warn('*************************************')
logger.warn('[HPM] Deprecated "option.proxyTable"')
logger.warn(' Use "option.router" instead')
logger.warn(' "option.proxyTable" will be removed in future release.')
logger.warn('*************************************')
options.router = _.clone(options.proxyTable)
_.omit(options, 'proxyTable')
}
return options
}
function configureLogger(options) {
if (options.logLevel) {
logger.setLevel(options.logLevel)
}
if (options.logProvider) {
logger.setProvider(options.logProvider)
}
}