'use strict'
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var utils = exports
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var util = require('util')
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function ProtocolError (code, message) {
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this.code = code
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this.message = message
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}
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util.inherits(ProtocolError, Error)
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utils.ProtocolError = ProtocolError
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utils.error = function error (code, message) {
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return new ProtocolError(code, message)
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}
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utils.reverse = function reverse (object) {
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var result = []
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Object.keys(object).forEach(function (key) {
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result[object[key] | 0] = key
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})
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return result
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}
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// weight [1, 36] <=> priority [0, 7]
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// This way weight=16 is preserved and has priority=3
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utils.weightToPriority = function weightToPriority (weight) {
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return ((Math.min(35, (weight - 1)) / 35) * 7) | 0
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}
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utils.priorityToWeight = function priorityToWeight (priority) {
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return (((priority / 7) * 35) | 0) + 1
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}
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// Copy-Paste from node
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exports.addHeaderLine = function addHeaderLine (field, value, dest) {
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field = field.toLowerCase()
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if (/^:/.test(field)) {
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dest[field] = value
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return
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}
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switch (field) {
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// Array headers:
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case 'set-cookie':
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if (dest[field] !== undefined) {
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dest[field].push(value)
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} else {
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dest[field] = [ value ]
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}
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break
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/* eslint-disable max-len */
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// list is taken from:
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/* eslint-enable max-len */
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case 'content-type':
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case 'content-length':
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case 'user-agent':
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case 'referer':
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case 'host':
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case 'authorization':
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case 'proxy-authorization':
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case 'if-modified-since':
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case 'if-unmodified-since':
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case 'from':
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case 'location':
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case 'max-forwards':
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// drop duplicates
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if (dest[field] === undefined) {
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dest[field] = value
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}
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break
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case 'cookie':
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// make semicolon-separated list
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if (dest[field] !== undefined) {
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dest[field] += '; ' + value
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} else {
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dest[field] = value
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}
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break
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default:
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// make comma-separated list
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if (dest[field] !== undefined) {
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dest[field] += ', ' + value
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} else {
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dest[field] = value
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}
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}
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}
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