/*!
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* body-parser
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* Copyright(c) 2014-2015 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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*/
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var bytes = require('bytes')
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var contentType = require('content-type')
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var debug = require('debug')('body-parser:text')
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var read = require('../read')
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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 = text
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/**
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* Create a middleware to parse text bodies.
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*
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* @param {object} [options]
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* @return {function}
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* @api public
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*/
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function text (options) {
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var opts = options || {}
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var defaultCharset = opts.defaultCharset || 'utf-8'
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var inflate = opts.inflate !== false
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var limit = typeof opts.limit !== 'number'
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? bytes.parse(opts.limit || '100kb')
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: opts.limit
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var type = opts.type || 'text/plain'
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var verify = opts.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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function parse (buf) {
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return buf
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}
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return function textParser (req, res, next) {
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if (req._body) {
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debug('body already parsed')
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next()
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return
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}
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req.body = req.body || {}
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// skip requests without bodies
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if (!typeis.hasBody(req)) {
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debug('skip empty body')
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next()
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return
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}
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debug('content-type %j', req.headers['content-type'])
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// determine if request should be parsed
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if (!shouldParse(req)) {
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debug('skip parsing')
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next()
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return
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}
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// get charset
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var charset = getCharset(req) || defaultCharset
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// read
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read(req, res, next, parse, debug, {
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encoding: charset,
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inflate: inflate,
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limit: limit,
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verify: verify
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})
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}
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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 (e) {
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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} 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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