diff options
Diffstat (limited to 'node_modules/body-parser/lib/types/urlencoded.js')
| -rw-r--r-- | node_modules/body-parser/lib/types/urlencoded.js | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/node_modules/body-parser/lib/types/urlencoded.js b/node_modules/body-parser/lib/types/urlencoded.js new file mode 100644 index 0000000..5ccda21 --- /dev/null +++ b/node_modules/body-parser/lib/types/urlencoded.js @@ -0,0 +1,284 @@ +/*! + * body-parser + * Copyright(c) 2014 Jonathan Ong + * Copyright(c) 2014-2015 Douglas Christopher Wilson + * MIT Licensed + */ + +'use strict' + +/** + * Module dependencies. + * @private + */ + +var bytes = require('bytes') +var contentType = require('content-type') +var createError = require('http-errors') +var debug = require('debug')('body-parser:urlencoded') +var deprecate = require('depd')('body-parser') +var read = require('../read') +var typeis = require('type-is') + +/** + * Module exports. + */ + +module.exports = urlencoded + +/** + * Cache of parser modules. + */ + +var parsers = Object.create(null) + +/** + * Create a middleware to parse urlencoded bodies. + * + * @param {object} [options] + * @return {function} + * @public + */ + +function urlencoded (options) { + var opts = options || {} + + // notice because option default will flip in next major + if (opts.extended === undefined) { + deprecate('undefined extended: provide extended option') + } + + var extended = opts.extended !== false + var inflate = opts.inflate !== false + var limit = typeof opts.limit !== 'number' + ? bytes.parse(opts.limit || '100kb') + : opts.limit + var type = opts.type || 'application/x-www-form-urlencoded' + var verify = opts.verify || false + + if (verify !== false && typeof verify !== 'function') { + throw new TypeError('option verify must be function') + } + + // create the appropriate query parser + var queryparse = extended + ? extendedparser(opts) + : simpleparser(opts) + + // create the appropriate type checking function + var shouldParse = typeof type !== 'function' + ? typeChecker(type) + : type + + function parse (body) { + return body.length + ? queryparse(body) + : {} + } + + return function urlencodedParser (req, res, next) { + if (req._body) { + debug('body already parsed') + next() + return + } + + req.body = req.body || {} + + // skip requests without bodies + if (!typeis.hasBody(req)) { + debug('skip empty body') + next() + return + } + + debug('content-type %j', req.headers['content-type']) + + // determine if request should be parsed + if (!shouldParse(req)) { + debug('skip parsing') + next() + return + } + + // assert charset + var charset = getCharset(req) || 'utf-8' + if (charset !== 'utf-8') { + debug('invalid charset') + next(createError(415, 'unsupported charset "' + charset.toUpperCase() + '"', { + charset: charset, + type: 'charset.unsupported' + })) + return + } + + // read + read(req, res, next, parse, debug, { + debug: debug, + encoding: charset, + inflate: inflate, + limit: limit, + verify: verify + }) + } +} + +/** + * Get the extended query parser. + * + * @param {object} options + */ + +function extendedparser (options) { + var parameterLimit = options.parameterLimit !== undefined + ? options.parameterLimit + : 1000 + var parse = parser('qs') + + if (isNaN(parameterLimit) || parameterLimit < 1) { + throw new TypeError('option parameterLimit must be a positive number') + } + + if (isFinite(parameterLimit)) { + parameterLimit = parameterLimit | 0 + } + + return function queryparse (body) { + var paramCount = parameterCount(body, parameterLimit) + + if (paramCount === undefined) { + debug('too many parameters') + throw createError(413, 'too many parameters', { + type: 'parameters.too.many' + }) + } + + var arrayLimit = Math.max(100, paramCount) + + debug('parse extended urlencoding') + return parse(body, { + allowPrototypes: true, + arrayLimit: arrayLimit, + depth: Infinity, + parameterLimit: parameterLimit + }) + } +} + +/** + * Get the charset of a request. + * + * @param {object} req + * @api private + */ + +function getCharset (req) { + try { + return (contentType.parse(req).parameters.charset || '').toLowerCase() + } catch (e) { + return undefined + } +} + +/** + * Count the number of parameters, stopping once limit reached + * + * @param {string} body + * @param {number} limit + * @api private + */ + +function parameterCount (body, limit) { + var count = 0 + var index = 0 + + while ((index = body.indexOf('&', index)) !== -1) { + count++ + index++ + + if (count === limit) { + return undefined + } + } + + return count +} + +/** + * Get parser for module name dynamically. + * + * @param {string} name + * @return {function} + * @api private + */ + +function parser (name) { + var mod = parsers[name] + + if (mod !== undefined) { + return mod.parse + } + + // this uses a switch for static require analysis + switch (name) { + case 'qs': + mod = require('qs') + break + case 'querystring': + mod = require('querystring') + break + } + + // store to prevent invoking require() + parsers[name] = mod + + return mod.parse +} + +/** + * Get the simple query parser. + * + * @param {object} options + */ + +function simpleparser (options) { + var parameterLimit = options.parameterLimit !== undefined + ? options.parameterLimit + : 1000 + var parse = parser('querystring') + + if (isNaN(parameterLimit) || parameterLimit < 1) { + throw new TypeError('option parameterLimit must be a positive number') + } + + if (isFinite(parameterLimit)) { + parameterLimit = parameterLimit | 0 + } + + return function queryparse (body) { + var paramCount = parameterCount(body, parameterLimit) + + if (paramCount === undefined) { + debug('too many parameters') + throw createError(413, 'too many parameters', { + type: 'parameters.too.many' + }) + } + + debug('parse urlencoding') + return parse(body, undefined, undefined, {maxKeys: parameterLimit}) + } +} + +/** + * Get the simple type checker. + * + * @param {string} type + * @return {function} + */ + +function typeChecker (type) { + return function checkType (req) { + return Boolean(typeis(req, type)) + } +} |