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/*!
* statuses
* Copyright(c) 2014 Jonathan Ong
* Copyright(c) 2016 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
var codes = require('./codes.json')
/**
* Module exports.
* @public
*/
module.exports = status
// status code to message map
status.STATUS_CODES = codes
// array of status codes
status.codes = populateStatusesMap(status, codes)
// status codes for redirects
status.redirect = {
300: true,
301: true,
302: true,
303: true,
305: true,
307: true,
308: true
}
// status codes for empty bodies
status.empty = {
204: true,
205: true,
304: true
}
// status codes for when you should retry the request
status.retry = {
502: true,
503: true,
504: true
}
/**
* Populate the statuses map for given codes.
* @private
*/
function populateStatusesMap (statuses, codes) {
var arr = []
Object.keys(codes).forEach(function forEachCode (code) {
var message = codes[code]
var status = Number(code)
// Populate properties
statuses[status] = message
statuses[message] = status
statuses[message.toLowerCase()] = status
// Add to array
arr.push(status)
})
return arr
}
/**
* Get the status code.
*
* Given a number, this will throw if it is not a known status
* code, otherwise the code will be returned. Given a string,
* the string will be parsed for a number and return the code
* if valid, otherwise will lookup the code assuming this is
* the status message.
*
* @param {string|number} code
* @returns {number}
* @public
*/
function status (code) {
if (typeof code === 'number') {
if (!status[code]) throw new Error('invalid status code: ' + code)
return code
}
if (typeof code !== 'string') {
throw new TypeError('code must be a number or string')
}
// '403'
var n = parseInt(code, 10)
if (!isNaN(n)) {
if (!status[n]) throw new Error('invalid status code: ' + n)
return n
}
n = status[code.toLowerCase()]
if (!n) throw new Error('invalid status message: "' + code + '"')
return n
}
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