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author | Yaroslav De La Peña Smirnov <yaros.rus_89@live.com.mx> | 2017-11-29 11:44:34 +0300 |
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committer | Yaroslav De La Peña Smirnov <yaros.rus_89@live.com.mx> | 2017-11-29 11:44:34 +0300 |
commit | 67fdec20726e48ba3a934cb25bb30d47ec4a4f29 (patch) | |
tree | 37fd9f4f0b0c20103e1646fc83021e4765de3680 /node_modules/body-parser/lib/types/json.js | |
download | spanish-checkers-67fdec20726e48ba3a934cb25bb30d47ec4a4f29.tar.gz spanish-checkers-67fdec20726e48ba3a934cb25bb30d47ec4a4f29.zip |
Initial commit, version 0.5.3
Diffstat (limited to 'node_modules/body-parser/lib/types/json.js')
-rw-r--r-- | node_modules/body-parser/lib/types/json.js | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/node_modules/body-parser/lib/types/json.js b/node_modules/body-parser/lib/types/json.js new file mode 100644 index 0000000..a7bc838 --- /dev/null +++ b/node_modules/body-parser/lib/types/json.js @@ -0,0 +1,232 @@ +/*! + * 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:json') +var read = require('../read') +var typeis = require('type-is') + +/** + * Module exports. + */ + +module.exports = json + +/** + * RegExp to match the first non-space in a string. + * + * Allowed whitespace is defined in RFC 7159: + * + * ws = *( + * %x20 / ; Space + * %x09 / ; Horizontal tab + * %x0A / ; Line feed or New line + * %x0D ) ; Carriage return + */ + +var FIRST_CHAR_REGEXP = /^[\x20\x09\x0a\x0d]*(.)/ // eslint-disable-line no-control-regex + +/** + * Create a middleware to parse JSON bodies. + * + * @param {object} [options] + * @return {function} + * @public + */ + +function json (options) { + var opts = options || {} + + var limit = typeof opts.limit !== 'number' + ? bytes.parse(opts.limit || '100kb') + : opts.limit + var inflate = opts.inflate !== false + var reviver = opts.reviver + var strict = opts.strict !== false + var type = opts.type || 'application/json' + var verify = opts.verify || false + + if (verify !== false && typeof verify !== 'function') { + throw new TypeError('option verify must be function') + } + + // create the appropriate type checking function + var shouldParse = typeof type !== 'function' + ? typeChecker(type) + : type + + function parse (body) { + if (body.length === 0) { + // special-case empty json body, as it's a common client-side mistake + // TODO: maybe make this configurable or part of "strict" option + return {} + } + + if (strict) { + var first = firstchar(body) + + if (first !== '{' && first !== '[') { + debug('strict violation') + throw createStrictSyntaxError(body, first) + } + } + + try { + debug('parse json') + return JSON.parse(body, reviver) + } catch (e) { + throw normalizeJsonSyntaxError(e, { + stack: e.stack + }) + } + } + + return function jsonParser (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 per RFC 7159 sec 8.1 + var charset = getCharset(req) || 'utf-8' + if (charset.substr(0, 4) !== 'utf-') { + debug('invalid charset') + next(createError(415, 'unsupported charset "' + charset.toUpperCase() + '"', { + charset: charset, + type: 'charset.unsupported' + })) + return + } + + // read + read(req, res, next, parse, debug, { + encoding: charset, + inflate: inflate, + limit: limit, + verify: verify + }) + } +} + +/** + * Create strict violation syntax error matching native error. + * + * @param {string} str + * @param {string} char + * @return {Error} + * @private + */ + +function createStrictSyntaxError (str, char) { + var index = str.indexOf(char) + var partial = str.substring(0, index) + '#' + + try { + JSON.parse(partial); /* istanbul ignore next */ throw new SyntaxError('strict violation') + } catch (e) { + return normalizeJsonSyntaxError(e, { + message: e.message.replace('#', char), + stack: e.stack + }) + } +} + +/** + * Get the first non-whitespace character in a string. + * + * @param {string} str + * @return {function} + * @private + */ + +function firstchar (str) { + return FIRST_CHAR_REGEXP.exec(str)[1] +} + +/** + * 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 + } +} + +/** + * Normalize a SyntaxError for JSON.parse. + * + * @param {SyntaxError} error + * @param {object} obj + * @return {SyntaxError} + */ + +function normalizeJsonSyntaxError (error, obj) { + var keys = Object.getOwnPropertyNames(error) + + for (var i = 0; i < keys.length; i++) { + var key = keys[i] + if (key !== 'stack' && key !== 'message') { + delete error[key] + } + } + + var props = Object.keys(obj) + + for (var j = 0; j < props.length; j++) { + var prop = props[j] + error[prop] = obj[prop] + } + + return error +} + +/** + * Get the simple type checker. + * + * @param {string} type + * @return {function} + */ + +function typeChecker (type) { + return function checkType (req) { + return Boolean(typeis(req, type)) + } +} |