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