84 lines
1.6 KiB
JavaScript
84 lines
1.6 KiB
JavaScript
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'use strict'
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/**
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* Module dependencies.
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*/
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var bytes = require('bytes')
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var contentType = require('content-type')
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var typeis = require('type-is')
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/**
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* Module exports.
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*/
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module.exports = {
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getCharset,
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normalizeOptions
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}
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/**
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* Get the charset of a request.
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*
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* @param {object} req
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* @api private
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*/
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function getCharset (req) {
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try {
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return (contentType.parse(req).parameters.charset || '').toLowerCase()
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} catch {
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return undefined
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}
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}
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/**
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* Get the simple type checker.
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*
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* @param {string | string[]} type
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* @return {function}
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*/
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function typeChecker (type) {
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return function checkType (req) {
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return Boolean(typeis(req, type))
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}
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}
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/**
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* Normalizes the common options for all parsers.
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*
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* @param {object} options options to normalize
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* @param {string | string[] | function} defaultType default content type(s) or a function to determine it
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* @returns {object}
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*/
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function normalizeOptions (options, defaultType) {
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if (!defaultType) {
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// Parsers must define a default content type
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throw new TypeError('defaultType must be provided')
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}
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var inflate = options?.inflate !== false
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var limit = typeof options?.limit !== 'number'
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? bytes.parse(options?.limit || '100kb')
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: options?.limit
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var type = options?.type || defaultType
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var verify = options?.verify || false
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if (verify !== false && typeof verify !== 'function') {
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throw new TypeError('option verify must be function')
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}
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// create the appropriate type checking function
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var shouldParse = typeof type !== 'function'
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? typeChecker(type)
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: type
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return {
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inflate,
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limit,
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verify,
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shouldParse
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}
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}
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