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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/serialize-javascript/index.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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+/*
+Copyright (c) 2014, Yahoo! Inc. All rights reserved.
+Copyrights licensed under the New BSD License.
+See the accompanying LICENSE file for terms.
+*/
+
+'use strict';
+
+// Generate an internal UID to make the regexp pattern harder to guess.
+var UID = Math.floor(Math.random() * 0x10000000000).toString(16);
+var PLACE_HOLDER_REGEXP = new RegExp('"@__(F|R|D)-' + UID + '-(\\d+)__@"', 'g');
+
+var IS_NATIVE_CODE_REGEXP = /\{\s*\[native code\]\s*\}/g;
+var UNSAFE_CHARS_REGEXP = /[<>\/\u2028\u2029]/g;
+
+// Mapping of unsafe HTML and invalid JavaScript line terminator chars to their
+// Unicode char counterparts which are safe to use in JavaScript strings.
+var ESCAPED_CHARS = {
+ '<' : '\\u003C',
+ '>' : '\\u003E',
+ '/' : '\\u002F',
+ '\u2028': '\\u2028',
+ '\u2029': '\\u2029'
+};
+
+function escapeUnsafeChars(unsafeChar) {
+ return ESCAPED_CHARS[unsafeChar];
+}
+
+module.exports = function serialize(obj, options) {
+ options || (options = {});
+
+ // Backwards-compatibility for `space` as the second argument.
+ if (typeof options === 'number' || typeof options === 'string') {
+ options = {space: options};
+ }
+
+ var functions = [];
+ var regexps = [];
+ var dates = [];
+
+ // Returns placeholders for functions and regexps (identified by index)
+ // which are later replaced by their string representation.
+ function replacer(key, value) {
+ if (!value) {
+ return value;
+ }
+
+ // If the value is an object w/ a toJSON method, toJSON is called before
+ // the replacer runs, so we use this[key] to get the non-toJSONed value.
+ var origValue = this[key];
+ var type = typeof origValue;
+
+ if (type === 'object') {
+ if(origValue instanceof RegExp) {
+ return '@__R-' + UID + '-' + (regexps.push(origValue) - 1) + '__@';
+ }
+
+ if(origValue instanceof Date) {
+ return '@__D-' + UID + '-' + (dates.push(origValue) - 1) + '__@';
+ }
+ }
+
+ if (type === 'function') {
+ return '@__F-' + UID + '-' + (functions.push(origValue) - 1) + '__@';
+ }
+
+ return value;
+ }
+
+ var str;
+
+ // Creates a JSON string representation of the value.
+ // NOTE: Node 0.12 goes into slow mode with extra JSON.stringify() args.
+ if (options.isJSON && !options.space) {
+ str = JSON.stringify(obj);
+ } else {
+ str = JSON.stringify(obj, options.isJSON ? null : replacer, options.space);
+ }
+
+ // Protects against `JSON.stringify()` returning `undefined`, by serializing
+ // to the literal string: "undefined".
+ if (typeof str !== 'string') {
+ return String(str);
+ }
+
+ // Replace unsafe HTML and invalid JavaScript line terminator chars with
+ // their safe Unicode char counterpart. This _must_ happen before the
+ // regexps and functions are serialized and added back to the string.
+ if (options.unsafe !== true) {
+ str = str.replace(UNSAFE_CHARS_REGEXP, escapeUnsafeChars);
+ }
+
+ if (functions.length === 0 && regexps.length === 0 && dates.length === 0) {
+ return str;
+ }
+
+ // Replaces all occurrences of function, regexp and date placeholders in the
+ // JSON string with their string representations. If the original value can
+ // not be found, then `undefined` is used.
+ return str.replace(PLACE_HOLDER_REGEXP, function (match, type, valueIndex) {
+ if (type === 'D') {
+ return "new Date(\"" + dates[valueIndex].toISOString() + "\")";
+ }
+
+ if (type === 'R') {
+ return regexps[valueIndex].toString();
+ }
+
+ var fn = functions[valueIndex];
+ var serializedFn = fn.toString();
+
+ if (IS_NATIVE_CODE_REGEXP.test(serializedFn)) {
+ throw new TypeError('Serializing native function: ' + fn.name);
+ }
+
+ return serializedFn;
+ });
+}