| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| /* |
| http://www.JSON.org/json2.js |
| 2009-04-16 |
| |
| Public Domain. |
| |
| NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK. |
| |
| See http://www.JSON.org/js.html |
| |
| This file creates a global JSON object containing two methods: stringify |
| and parse. |
| |
| JSON.stringify(value, replacer, space) |
| value any JavaScript value, usually an object or array. |
| |
| replacer an optional parameter that determines how object |
| values are stringified for objects. It can be a |
| function or an array of strings. |
| |
| space an optional parameter that specifies the indentation |
| of nested structures. If it is omitted, the text will |
| be packed without extra whitespace. If it is a number, |
| it will specify the number of spaces to indent at each |
| level. If it is a string (such as '\t' or ' '), |
| it contains the characters used to indent at each level. |
| |
| This method produces a JSON text from a JavaScript value. |
| |
| When an object value is found, if the object contains a toJSON |
| method, its toJSON method will be called and the result will be |
| stringified. A toJSON method does not serialize: it returns the |
| value represented by the name/value pair that should be serialized, |
| or undefined if nothing should be serialized. The toJSON method |
| will be passed the key associated with the value, and this will be |
| bound to the object holding the key. |
| |
| For example, this would serialize Dates as ISO strings. |
| |
| Date.prototype.toJSON = function (key) { |
| function f(n) { |
| // Format integers to have at least two digits. |
| return n < 10 ? '0' + n : n; |
| } |
| |
| return this.getUTCFullYear() + '-' + |
| f(this.getUTCMonth() + 1) + '-' + |
| f(this.getUTCDate()) + 'T' + |
| f(this.getUTCHours()) + ':' + |
| f(this.getUTCMinutes()) + ':' + |
| f(this.getUTCSeconds()) + 'Z'; |
| }; |
| |
| You can provide an optional replacer method. It will be passed the |
| key and value of each member, with this bound to the containing |
| object. The value that is returned from your method will be |
| serialized. If your method returns undefined, then the member will |
| be excluded from the serialization. |
| |
| If the replacer parameter is an array of strings, then it will be |
| used to select the members to be serialized. It filters the results |
| such that only members with keys listed in the replacer array are |
| stringified. |
| |
| Values that do not have JSON representations, such as undefined or |
| functions, will not be serialized. Such values in objects will be |
| dropped; in arrays they will be replaced with null. You can use |
| a replacer function to replace those with JSON values. |
| JSON.stringify(undefined) returns undefined. |
| |
| The optional space parameter produces a stringification of the |
| value that is filled with line breaks and indentation to make it |
| easier to read. |
| |
| If the space parameter is a non-empty string, then that string will |
| be used for indentation. If the space parameter is a number, then |
| the indentation will be that many spaces. |
| |
| Example: |
| |
| text = JSON.stringify(['e', {pluribus: 'unum'}]); |
| // text is '["e",{"pluribus":"unum"}]' |
| |
| |
| text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t'); |
| // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]' |
| |
| text = JSON.stringify([new Date()], function (key, value) { |
| return this[key] instanceof Date ? |
| 'Date(' + this[key] + ')' : value; |
| }); |
| // text is '["Date(---current time---)"]' |
| |
| |
| JSON.parse(text, reviver) |
| This method parses a JSON text to produce an object or array. |
| It can throw a SyntaxError exception. |
| |
| The optional reviver parameter is a function that can filter and |
| transform the results. It receives each of the keys and values, |
| and its return value is used instead of the original value. |
| If it returns what it received, then the structure is not modified. |
| If it returns undefined then the member is deleted. |
| |
| Example: |
| |
| // Parse the text. Values that look like ISO date strings will |
| // be converted to Date objects. |
| |
| myData = JSON.parse(text, function (key, value) { |
| var a; |
| if (typeof value === 'string') { |
| a = |
| /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value); |
| if (a) { |
| return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4], |
| +a[5], +a[6])); |
| } |
| } |
| return value; |
| }); |
| |
| myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) { |
| var d; |
| if (typeof value === 'string' && |
| value.slice(0, 5) === 'Date(' && |
| value.slice(-1) === ')') { |
| d = new Date(value.slice(5, -1)); |
| if (d) { |
| return d; |
| } |
| } |
| return value; |
| }); |
| |
| |
| This is a reference implementation. You are free to copy, modify, or |
| redistribute. |
| |
| This code should be minified before deployment. |
| See http://javascript.crockford.com/jsmin.html |
| |
| USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO |
| NOT CONTROL. |
| */ |
| |
| /*jslint evil: true */ |
| |
| /*global JSON */ |
| |
| /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply, |
| call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours, |
| getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join, |
| lastIndex, length, parse, prototype, push, replace, slice, stringify, |
| test, toJSON, toString, valueOf |
| */ |
| |
| // Create a JSON object only if one does not already exist. We create the |
| // methods in a closure to avoid creating global variables. |
| |
| if (!this.JSON) { |
| JSON = {}; |
| } |
| (function () { |
| |
| function f(n) { |
| // Format integers to have at least two digits. |
| return n < 10 ? '0' + n : n; |
| } |
| |
| if (typeof Date.prototype.toJSON !== 'function') { |
| |
| Date.prototype.toJSON = function (key) { |
| |
| return this.getUTCFullYear() + '-' + |
| f(this.getUTCMonth() + 1) + '-' + |
| f(this.getUTCDate()) + 'T' + |
| f(this.getUTCHours()) + ':' + |
| f(this.getUTCMinutes()) + ':' + |
| f(this.getUTCSeconds()) + 'Z'; |
| }; |
| } |
| |
| var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, |
| escapable = /[\\\"\x00-\x1F]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]/g, |
| gap, |
| indent, |
| meta = { // table of character substitutions |
| '\b': '\\b', |
| '\t': '\\t', |
| '\n': '\\n', |
| '\f': '\\f', |
| '\r': '\\r', |
| '"' : '\\"', |
| '\\': '\\\\' |
| }, |
| rep; |
| |
| |
| function quote(string) { |
| |
| // If the string contains no control characters, no quote characters, no |
| // backslash characters, and no lone surrogates, then we can safely |
| // slap some quotes around it. Otherwise we must also replace the |
| // offending characters with safe escape sequences. |
| |
| escapable.lastIndex = 0; |
| return escapable.test(string) ? |
| '"' + string.replace(escapable, function (a) { |
| var c = meta[a]; |
| return typeof c === 'string' ? c : |
| '\\u' + a.charCodeAt(0).toString(16).padStart(4, '0'); |
| }) + '"' : |
| '"' + string + '"'; |
| } |
| |
| |
| function str(key, holder) { |
| |
| // Produce a string from holder[key]. |
| |
| var i, // The loop counter. |
| k, // The member key. |
| v, // The member value. |
| length, |
| mind = gap, |
| partial, |
| value = holder[key]; |
| |
| // If the value has a toJSON method, call it to obtain a replacement value. |
| |
| if (value && typeof value === 'object' && |
| typeof value.toJSON === 'function') { |
| value = value.toJSON(key); |
| } |
| |
| // If we were called with a replacer function, then call the replacer to |
| // obtain a replacement value. |
| |
| if (typeof rep === 'function') { |
| value = rep.call(holder, key, value); |
| } |
| |
| // What happens next depends on the value's type. |
| |
| if (value && ((typeof value) === "object")) { |
| if (value.constructor === String || value.constructor === Number || value.constructor === Boolean) |
| value = value.valueOf(); |
| } |
| |
| switch (typeof value) { |
| case 'string': |
| return quote(value); |
| |
| case 'number': |
| |
| // JSON numbers must be finite. Encode non-finite numbers as null. |
| |
| return isFinite(value) ? String(value) : 'null'; |
| |
| case 'boolean': |
| case 'null': |
| |
| // If the value is a boolean or null, convert it to a string. Note: |
| // typeof null does not produce 'null'. The case is included here in |
| // the remote chance that this gets fixed someday. |
| |
| return String(value); |
| |
| // If the type is 'object', we might be dealing with an object or an array or |
| // null. |
| |
| case 'object': |
| |
| // Due to a specification blunder in ECMAScript, typeof null is 'object', |
| // so watch out for that case. |
| |
| if (!value) { |
| return 'null'; |
| } |
| |
| // Make an array to hold the partial results of stringifying this object value. |
| |
| gap += indent; |
| partial = []; |
| |
| // Is the value an array? |
| |
| if (Object.prototype.toString.apply(value) === '[object Array]') { |
| |
| // The value is an array. Stringify every element. Use null as a placeholder |
| // for non-JSON values. |
| |
| length = value.length; |
| for (i = 0; i < length; i += 1) { |
| partial[i] = str(i, value) || 'null'; |
| } |
| |
| // Join all of the elements together, separated with commas, and wrap them in |
| // brackets. |
| |
| v = partial.length === 0 ? '[]' : |
| gap ? '[\n' + gap + |
| partial.join(',\n' + gap) + '\n' + |
| mind + ']' : |
| '[' + partial.join(',') + ']'; |
| gap = mind; |
| return v; |
| } |
| |
| // If the replacer is an array, use it to select the members to be stringified. |
| |
| if (rep && typeof rep === 'object') { |
| length = rep.length; |
| for (i = 0; i < length; i += 1) { |
| k = rep[i]; |
| if (typeof k === 'string') { |
| v = str(k, value); |
| if (v) { |
| partial.push(quote(k) + (gap ? ': ' : ':') + v); |
| } |
| } |
| } |
| } else { |
| |
| // Otherwise, iterate through all of the keys in the object. |
| |
| for (k in value) { |
| if (Object.hasOwnProperty.call(value, k)) { |
| v = str(k, value); |
| if (v) { |
| partial.push(quote(k) + (gap ? ': ' : ':') + v); |
| } |
| } |
| } |
| } |
| |
| // Join all of the member texts together, separated with commas, |
| // and wrap them in braces. |
| |
| v = partial.length === 0 ? '{}' : |
| gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + |
| mind + '}' : '{' + partial.join(',') + '}'; |
| gap = mind; |
| return v; |
| } |
| } |
| |
| // If the JSON object does not yet have a stringify method, give it one. |
| |
| if (typeof JSON.stringify !== 'function') { |
| JSON.stringify = function (value, replacer, space) { |
| |
| // The stringify method takes a value and an optional replacer, and an optional |
| // space parameter, and returns a JSON text. The replacer can be a function |
| // that can replace values, or an array of strings that will select the keys. |
| // A default replacer method can be provided. Use of the space parameter can |
| // produce text that is more easily readable. |
| |
| var i; |
| gap = ''; |
| indent = ''; |
| |
| // If the space parameter is a number, make an indent string containing that |
| // many spaces. |
| |
| if (typeof space === 'number') { |
| for (i = 0; i < space; i += 1) { |
| indent += ' '; |
| } |
| |
| // If the space parameter is a string, it will be used as the indent string. |
| |
| } else if (typeof space === 'string') { |
| indent = space; |
| } |
| |
| // If there is a replacer, it must be a function or an array. |
| // Otherwise, throw an error. |
| |
| rep = replacer; |
| if (replacer && typeof replacer !== 'function' && |
| (typeof replacer !== 'object' || |
| typeof replacer.length !== 'number')) { |
| throw new Error('JSON.stringify'); |
| } |
| |
| // Make a fake root object containing our value under the key of ''. |
| // Return the result of stringifying the value. |
| |
| return str('', {'': value}); |
| }; |
| } |
| |
| |
| // If the JSON object does not yet have a parse method, give it one. |
| |
| if (typeof JSON.parse !== 'function') { |
| JSON.parse = function (text, reviver) { |
| |
| // The parse method takes a text and an optional reviver function, and returns |
| // a JavaScript value if the text is a valid JSON text. |
| |
| var j; |
| |
| function walk(holder, key) { |
| |
| // The walk method is used to recursively walk the resulting structure so |
| // that modifications can be made. |
| |
| var k, v, value = holder[key]; |
| if (value && typeof value === 'object') { |
| for (k in value) { |
| if (Object.hasOwnProperty.call(value, k)) { |
| v = walk(value, k); |
| if (v !== undefined) { |
| value[k] = v; |
| } else { |
| delete value[k]; |
| } |
| } |
| } |
| } |
| return reviver.call(holder, key, value); |
| } |
| |
| |
| // Parsing happens in four stages. In the first stage, we replace certain |
| // Unicode characters with escape sequences. JavaScript handles many characters |
| // incorrectly, either silently deleting them, or treating them as line endings. |
| |
| cx.lastIndex = 0; |
| if (cx.test(text)) { |
| text = text.replace(cx, function (a) { |
| return '\\u' + |
| ('0000' + a.charCodeAt(0).toString(16)).slice(-4); |
| }); |
| } |
| |
| // In the second stage, we run the text against regular expressions that look |
| // for non-JSON patterns. We are especially concerned with '()' and 'new' |
| // because they can cause invocation, and '=' because it can cause mutation. |
| // But just to be safe, we want to reject all unexpected forms. |
| |
| // We split the second stage into 4 regexp operations in order to work around |
| // crippling inefficiencies in IE's and Safari's regexp engines. First we |
| // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we |
| // replace all simple value tokens with ']' characters. Third, we delete all |
| // open brackets that follow a colon or comma or that begin the text. Finally, |
| // we look to see that the remaining characters are only whitespace or ']' or |
| // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval. |
| |
| if (/^[\],:{}\s]*$/. |
| test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@'). |
| replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'). |
| replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { |
| |
| // In the third stage we use the eval function to compile the text into a |
| // JavaScript structure. The '{' operator is subject to a syntactic ambiguity |
| // in JavaScript: it can begin a block or an object literal. We wrap the text |
| // in parens to eliminate the ambiguity. |
| |
| j = eval('(' + text + ')'); |
| |
| // In the optional fourth stage, we recursively walk the new structure, passing |
| // each name/value pair to a reviver function for possible transformation. |
| |
| return typeof reviver === 'function' ? |
| walk({'': j}, '') : j; |
| } |
| |
| // If the text is not JSON parseable, then a SyntaxError is thrown. |
| |
| throw new SyntaxError('JSON.parse'); |
| }; |
| } |
| }()); |