483 lines
17 KiB
JavaScript
483 lines
17 KiB
JavaScript
alert('IMPORTANT: Remove this line from json2.js before deployment.');
|
|
/*
|
|
http://www.JSON.org/json2.js
|
|
2010-08-25
|
|
|
|
Public Domain.
|
|
|
|
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
|
|
|
|
See http://www.JSON.org/js.html
|
|
|
|
|
|
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.
|
|
|
|
|
|
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 value
|
|
|
|
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.
|
|
*/
|
|
|
|
/*jslint evil: true, strict: false */
|
|
|
|
/*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) {
|
|
this.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 isFinite(this.valueOf()) ?
|
|
this.getUTCFullYear() + '-' +
|
|
f(this.getUTCMonth() + 1) + '-' +
|
|
f(this.getUTCDate()) + 'T' +
|
|
f(this.getUTCHours()) + ':' +
|
|
f(this.getUTCMinutes()) + ':' +
|
|
f(this.getUTCSeconds()) + 'Z' : null;
|
|
};
|
|
|
|
String.prototype.toJSON =
|
|
Number.prototype.toJSON =
|
|
Boolean.prototype.toJSON = function (key) {
|
|
return this.valueOf();
|
|
};
|
|
}
|
|
|
|
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
|
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/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, and no
|
|
// backslash characters, 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' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
|
|
}) + '"' :
|
|
'"' + 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.
|
|
|
|
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.
|
|
|
|
text = String(text);
|
|
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');
|
|
};
|
|
}
|
|
}()); |