wip

Author: Stuart Robinson

browserified/index.html

@@ -2263,7 +2263,8 @@ function deleteFunctions(obj){
  }
 }
 
-module.exports = 
+// module.exportsPRESERVED = 
+ 
 function serialize(obj, options) {
  options || (options = {});
 

browserified/index.js

@@ -55,6 +55,7 @@ function deleteFunctions(obj){
  }
 }
 
+// module.exportsPRESERVED = 
 module.exports = 
 function serialize(obj, options) {
  options || (options = {});

browserified/min.js

@@ -0,0 +1,249 @@
+/*
+Copyright (c) 2014, Yahoo! Inc. All rights reserved.
+Copyrights licensed under the New BSD License.
+See the accompanying LICENSE file for terms.
+*/
+
+'use strict';
+
+var randomBytes = require('randombytes');
+
+// Generate an internal UID to make the regexp pattern harder to guess.
+var UID_LENGTH = 16;
+var UID = generateUID();
+var PLACE_HOLDER_REGEXP = new RegExp('(\\\\)?"@__(F|R|D|M|S|U|I|B)-' + UID + '-(\\d+)__@"', 'g');
+
+var IS_NATIVE_CODE_REGEXP = /\{\s*\[native code\]\s*\}/g;
+var IS_PURE_FUNCTION = /function.*?\(/;
+var IS_ARROW_FUNCTION = /.*?=>.*?/;
+var UNSAFE_CHARS_REGEXP = /[<>\/\u2028\u2029]/g;
+
+var RESERVED_SYMBOLS = ['*', 'async'];
+
+// 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];
+}
+
+function generateUID() {
+ var bytes = randomBytes(UID_LENGTH);
+ var result = '';
+ for(var i=0; i<UID_LENGTH; ++i) {
+ result += bytes[i].toString(16);
+ }
+ return result;
+}
+
+function deleteFunctions(obj){
+ var functionKeys = [];
+ for (var key in obj) {
+ if (typeof obj[key] === "function") {
+ functionKeys.push(key);
+ }
+ }
+ for (var i = 0; i < functionKeys.length; i++) {
+ delete obj[functionKeys[i]];
+ }
+}
+
+// module.exportsPRESERVED = 
+ 
+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 = [];
+ var maps = [];
+ var sets = [];
+ var undefs = [];
+ var infinities= [];
+ var bigInts = [];
+
+ // Returns placeholders for functions and regexps (identified by index)
+ // which are later replaced by their string representation.
+ function replacer(key, value) {
+
+ // For nested function
+ if(options.ignoreFunction){
+ deleteFunctions(value);
+ }
+
+ if (!value && value !== undefined) {
+ 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(origValue instanceof Map) {
+ return '@__M-' + UID + '-' + (maps.push(origValue) - 1) + '__@';
+ }
+
+ if(origValue instanceof Set) {
+ return '@__S-' + UID + '-' + (sets.push(origValue) - 1) + '__@';
+ }
+ }
+
+ if (type === 'function') {
+ return '@__F-' + UID + '-' + (functions.push(origValue) - 1) + '__@';
+ }
+
+ if (type === 'undefined') {
+ return '@__U-' + UID + '-' + (undefs.push(origValue) - 1) + '__@';
+ }
+
+ if (type === 'number' && !isNaN(origValue) && !isFinite(origValue)) {
+ return '@__I-' + UID + '-' + (infinities.push(origValue) - 1) + '__@';
+ }
+
+ if (type === 'bigint') {
+ return '@__B-' + UID + '-' + (bigInts.push(origValue) - 1) + '__@';
+ }
+
+ return value;
+ }
+
+ function serializeFunc(fn) {
+ var serializedFn = fn.toString();
+ if (IS_NATIVE_CODE_REGEXP.test(serializedFn)) {
+ throw new TypeError('Serializing native function: ' + fn.name);
+ }
+
+ // pure functions, example: {key: function() {}}
+ if(IS_PURE_FUNCTION.test(serializedFn)) {
+ return serializedFn;
+ }
+
+ // arrow functions, example: arg1 => arg1+5
+ if(IS_ARROW_FUNCTION.test(serializedFn)) {
+ return serializedFn;
+ }
+
+ var argsStartsAt = serializedFn.indexOf('(');
+ var def = serializedFn.substr(0, argsStartsAt)
+ .trim()
+ .split(' ')
+ .filter(function(val) { return val.length > 0 });
+
+ var nonReservedSymbols = def.filter(function(val) {
+ return RESERVED_SYMBOLS.indexOf(val) === -1
+ });
+
+ // enhanced literal objects, example: {key() {}}
+ if(nonReservedSymbols.length > 0) {
+ return (def.indexOf('async') > -1 ? 'async ' : '') + 'function'
+ + (def.join('').indexOf('*') > -1 ? '*' : '')
+ + serializedFn.substr(argsStartsAt);
+ }
+
+ // arrow functions
+ return serializedFn;
+ }
+
+ // Check if the parameter is function
+ if (options.ignoreFunction && typeof obj === "function") {
+ obj = undefined;
+ }
+ // Protects against `JSON.stringify()` returning `undefined`, by serializing
+ // to the literal string: "undefined".
+ if (obj === undefined) {
+ return String(obj);
+ }
+
+ 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 && maps.length === 0 && sets.length === 0 && undefs.length === 0 && infinities.length === 0 && bigInts.length === 0) {
+ return str;
+ }
+
+ // Replaces all occurrences of function, regexp, date, map and set 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, backSlash, type, valueIndex) {
+ // The placeholder may not be preceded by a backslash. This is to prevent
+ // replacing things like `"a\"@__R-<UID>-0__@"` and thus outputting
+ // invalid JS.
+ if (backSlash) {
+ return match;
+ }
+
+ if (type === 'D') {
+ return "new Date(\"" + dates[valueIndex].toISOString() + "\")";
+ }
+
+ if (type === 'R') {
+ return "new RegExp(" + serialize(regexps[valueIndex].source) + ", \"" + regexps[valueIndex].flags + "\")";
+ }
+
+ if (type === 'M') {
+ return "new Map(" + serialize(Array.from(maps[valueIndex].entries()), options) + ")";
+ }
+
+ if (type === 'S') {
+ return "new Set(" + serialize(Array.from(sets[valueIndex].values()), options) + ")";
+ }
+
+ if (type === 'U') {
+ return 'undefined'
+ }
+
+ if (type === 'I') {
+ return infinities[valueIndex];
+ }
+
+ if (type === 'B') {
+ return "BigInt(\"" + bigInts[valueIndex] + "\")";
+ }
+
+ var fn = functions[valueIndex];
+
+ return serializeFunc(fn);
+ });
+}

index.js

@@ -6,7 +6,7 @@
  "scripts": {
  "benchmark": "node -v && node test/benchmark/serialize.js",
  "test": "nyc --reporter=lcov mocha test/unit",
- "browserify": "browserify index.js | uglifyjs > browserified/min.js; browserify index.js -o browserified/index.js; "
+ "browserify": "sed 's/module.exports =//g' index.js > indexPrepared.js; browserify indexPrepared.js | uglifyjs > browserified/min.js; browserify indexPrepared.js -o browserified/index.js; "
  },
  "repository": {
  "type": "git",