/** * @file transport.js * @description 用於支持AJAX的傳輸類。 * @author ECShop R&D Team ( http://www.ecshop.com/ ) * @date 2007-03-08 Wednesday * @license Licensed under the Academic Free License 2.1 http://www.opensource.org/licenses/afl-2.1.php * @version 1.0.20070308 **/ var Transport = { /* * * 存儲本對象所在的文件名。 * * @static */ filename : "transport.js", /* * * 存儲是否進入調試模式的開關,打印調試消息的方式,換行符,調試用的容器的ID。 * * @private */ debugging : { isDebugging : 0, debuggingMode : 0, linefeed : "", containerId : 0 }, /* * * 設置調試模式以及打印調試消息方式的方法。 * * @public * @param {int} 是否打開調試模式 0:關閉,1:打開 * @param {int} 打印調試消息的方式 0:alert,1:innerHTML * */ debug : function (isDebugging, debuggingMode) { this.debugging = { "isDebugging" : isDebugging, "debuggingMode" : debuggingMode, "linefeed" : debuggingMode ? "<br />" : "\n", "containerId" : "dubugging-container" + new Date().getTime() }; }, /* * * 傳輸完畢後自動調用的方法,優先級比用戶從run()方法中傳入的回調函數高。 * * @public */ onComplete : function () { }, /* * * 傳輸過程當中自動調用的方法。 * * @public */ onRunning : function () { }, /* * * 調用此方法發送HTTP請求。 * * @public * @param {string} url 請求的URL地址 * @param {mix} params 發送參數 * @param {Function} callback 回調函數 * @param {string} ransferMode 請求的方式,有"GET"和"POST"兩種 * @param {string} responseType 響應類型,有"JSON"、"XML"和"TEXT"三種 * @param {boolean} asyn 是否異步請求的方式 * @param {boolean} quiet 是否安靜模式請求 */ run : function (url, params, callback, transferMode, responseType, asyn, quiet) { /* 處理用戶在調用該方法時輸入的參數 */ params = this.parseParams(params); transferMode = typeof(transferMode) === "string" && transferMode.toUpperCase() === "GET" ? "GET" : "POST"; if (transferMode === "GET") { var d = new Date(); url += params ? (url.indexOf("?") === - 1 ? "?" : "&") + params : ""; url = encodeURI(url) + (url.indexOf("?") === - 1 ? "?" : "&") + d.getTime() + d.getMilliseconds(); params = null; } responseType = typeof(responseType) === "string" && ((responseType = responseType.toUpperCase()) === "JSON" || responseType === "XML") ? responseType : "TEXT"; asyn = asyn === false ? false : true; /* 處理HTTP請求和響應 */ var xhr = this.createXMLHttpRequest(); try { var self = this; if (typeof(self.onRunning) === "function" && !quiet) { self.onRunning(); } xhr.open(transferMode, url, asyn); if (transferMode === "POST") { xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); } if (asyn) { xhr.onreadystatechange = function () { if (xhr.readyState == 4) { switch ( xhr.status ) { case 0: case 200: // OK! /* * If the request was to create a new resource * (such as post an item to the database) * You could instead return a status code of '201 Created' */ if (typeof(self.onComplete) === "function") { self.onComplete(); } if (typeof(callback) === "function") { callback.call(self, self.parseResult(responseType, xhr), xhr.responseText); } break; case 304: // Not Modified /* * This would be used when your Ajax widget is * checking for updated content, * such as the Twitter interface. */ break; case 400: // Bad Request /* * A bit like a safety net for requests by your JS interface * that aren't supported on the server. * "Your browser made a request that the server cannot understand" */ alert("XmlHttpRequest status: [400] Bad Request"); break; case 404: // Not Found alert("XmlHttpRequest status: [404] \nThe requested URL "+url+" was not found on this server."); break; case 409: // Conflict /* * Perhaps your JavaScript request attempted to * update a Database record * but failed due to a conflict * (eg: a field that must be unique) */ break; case 503: // Service Unavailable /* * A resource that this request relies upon * is currently unavailable * (eg: a file is locked by another process) */ alert("XmlHttpRequest status: [503] Service Unavailable"); break; default: alert("XmlHttpRequest status: [" + xhr.status + "] Unknow status."); } xhr = null; } } if (xhr != null) xhr.send(params); } else { if (typeof(self.onRunning) === "function") { self.onRunning(); } xhr.send(params); var result = self.parseResult(responseType, xhr); //xhr = null; if (typeof(self.onComplete) === "function") { self.onComplete(); } if (typeof(callback) === "function") { callback.call(self, result, xhr.responseText); } return result; } } catch (ex) { if (typeof(self.onComplete) === "function") { self.onComplete(); } alert(this.filename + "/run() error:" + ex.description); } }, /* * * 若是開啓了調試模式,該方法會打印出相應的信息。 * * @private * @param {string} info 調試信息 * @param {string} type 信息類型 */ displayDebuggingInfo : function (info, type) { if ( ! this.debugging.debuggingMode) { alert(info); } else { var id = this.debugging.containerId; if ( ! document.getElementById(id)) { div = document.createElement("DIV"); div.id = id; div.style.position = "absolute"; div.style.width = "98%"; div.style.border = "1px solid #f00"; div.style.backgroundColor = "#eef"; var pageYOffset = document.body.scrollTop || window.pageYOffset || 0; div.style.top = document.body.clientHeight * 0.6 + pageYOffset + "px"; document.body.appendChild(div); div.innerHTML = "<div></div>" + "<hr style='height:1px;border:1px dashed red;'>" + "<div></div>"; } var subDivs = div.getElementsByTagName("DIV"); if (type === "param") { subDivs[0].innerHTML = info; } else { subDivs[1].innerHTML = info; } } }, /* * * 建立XMLHttpRequest對象的方法。 * * @private * @return 返回一個XMLHttpRequest對象 * @type Object */ createXMLHttpRequest : function () { var xhr = null; if (window.ActiveXObject) { var versions = ['Microsoft.XMLHTTP', 'MSXML6.XMLHTTP', 'MSXML5.XMLHTTP', 'MSXML4.XMLHTTP', 'MSXML3.XMLHTTP', 'MSXML2.XMLHTTP', 'MSXML.XMLHTTP']; for (var i = 0; i < versions.length; i ++ ) { try { xhr = new ActiveXObject(versions[i]); break; } catch (ex) { continue; } } } else { xhr = new XMLHttpRequest(); } return xhr; }, /* * * 當傳輸過程發生錯誤時將調用此方法。 * * @private * @param {Object} xhr XMLHttpRequest對象 * @param {String} url HTTP請求的地址 */ onXMLHttpRequestError : function (xhr, url) { throw "URL: " + url + "\n" + "readyState: " + xhr.readyState + "\n" + "state: " + xhr.status + "\n" + "headers: " + xhr.getAllResponseHeaders(); }, /* * * 對將要發送的參數進行格式化。 * * @private * @params {mix} params 將要發送的參數 * @return 返回合法的參數 * @type string */ parseParams : function (params) { var legalParams = ""; params = params ? params : ""; if (typeof(params) === "string") { legalParams = params; } else if (typeof(params) === "object") { try { legalParams = "JSON=" + params.toJSONString(); } catch (ex) { alert("Can't stringify JSON!"); return false; } } else { alert("Invalid parameters!"); return false; } if (this.debugging.isDebugging) { var lf = this.debugging.linefeed, info = "[Original Parameters]" + lf + params + lf + lf + "[Parsed Parameters]" + lf + legalParams; this.displayDebuggingInfo(info, "param"); } return legalParams; }, /* * * 對返回的HTTP響應結果進行過濾。 * * @public * @params {mix} result HTTP響應結果 * @return 返回過濾後的結果 * @type string */ preFilter : function (result) { return result.replace(/\xEF\xBB\xBF/g, ""); }, /* * * 對返回的結果進行格式化。 * * @private * @return 返回特定格式的數據結果 * @type mix */ parseResult : function (responseType, xhr) { var result = null; switch (responseType) { case "JSON" : result = this.preFilter(xhr.responseText); try { result = result.parseJSON(); } catch (ex) { throw this.filename + "/parseResult() error: can't parse to JSON.\n\n" + xhr.responseText; } break; case "XML" : result = xhr.responseXML; break; case "TEXT" : result = this.preFilter(xhr.responseText); break; default : throw this.filename + "/parseResult() error: unknown response type:" + responseType; } if (this.debugging.isDebugging) { var lf = this.debugging.linefeed, info = "[Response Result of " + responseType + " Format]" + lf + result; if (responseType === "JSON") { info = "[Response Result of TEXT Format]" + lf + xhr.responseText + lf + lf + info; } this.displayDebuggingInfo(info, "result"); } return result; } }; /* 定義兩個別名 */ var Ajax = Transport; Ajax.call = Transport.run; /* json.js 2007-03-06 Public Domain This file adds these methods to JavaScript: array.toJSONString() boolean.toJSONString() date.toJSONString() number.toJSONString() object.toJSONString() string.toJSONString() These methods produce a JSON text from a JavaScript value. It must not contain any cyclical references. Illegal values will be excluded. The default conversion for dates is to an ISO string. You can add a toJSONString method to any date object to get a different representation. string.parseJSON(filter) This method parses a JSON text to produce an object or array. It can throw a SyntaxError exception. The optional filter parameter is a function which 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 structure is not modified. If it returns undefined then the member is deleted. Example: // Parse the text. If a key contains the string 'date' then // convert the value to a date. myData = text.parseJSON(function (key, value) { return key.indexOf('date') >= 0 ? new Date(value) : value; }); It is expected that these methods will formally become part of the JavaScript Programming Language in the Fourth Edition of the ECMAScript standard in 2008. */ // Augment the basic prototypes if they have not already been augmented. if ( ! Object.prototype.toJSONString) { Array.prototype.toJSONString = function () { var a = ['['], // The array holding the text fragments. b, // A boolean indicating that a comma is required. i, // Loop counter. l = this.length, v; // The value to be stringified. function p(s) { // p accumulates text fragments in an array. It inserts a comma before all // except the first fragment. if (b) { a.push(','); } a.push(s); b = true; } // For each value in this array... for (i = 0; i < l; i ++) { v = this[i]; switch (typeof v) { // Values without a JSON representation are ignored. case 'undefined': case 'function': case 'unknown': break; // Serialize a JavaScript object value. Ignore objects thats lack the // toJSONString method. Due to a specification error in ECMAScript, // typeof null is 'object', so watch out for that case. case 'object': if (v) { if (typeof v.toJSONString === 'function') { p(v.toJSONString()); } } else { p("null"); } break; // Otherwise, serialize the value. default: p(v.toJSONString()); } } // Join all of the fragments together and return. a.push(']'); return a.join(''); }; Boolean.prototype.toJSONString = function () { return String(this); }; Date.prototype.toJSONString = function () { // Ultimately, this method will be equivalent to the date.toISOString method. function f(n) { // Format integers to have at least two digits. return n < 10 ? '0' + n : n; } return '"' + this.getFullYear() + '-' + f(this.getMonth() + 1) + '-' + f(this.getDate()) + 'T' + f(this.getHours()) + ':' + f(this.getMinutes()) + ':' + f(this.getSeconds()) + '"'; }; Number.prototype.toJSONString = function () { // JSON numbers must be finite. Encode non-finite numbers as null. return isFinite(this) ? String(this) : "null"; }; Object.prototype.toJSONString = function () { var a = ['{'], // The array holding the text fragments. b, // A boolean indicating that a comma is required. k, // The current key. v; // The current value. function p(s) { // p accumulates text fragment pairs in an array. It inserts a comma before all // except the first fragment pair. if (b) { a.push(','); } a.push(k.toJSONString(), ':', s); b = true; } // Iterate through all of the keys in the object, ignoring the proto chain. for (k in this) { if (this.hasOwnProperty(k)) { v = this[k]; switch (typeof v) { // Values without a JSON representation are ignored. case 'undefined': case 'function': case 'unknown': break; // Serialize a JavaScript object value. Ignore objects that lack the // toJSONString method. Due to a specification error in ECMAScript, // typeof null is 'object', so watch out for that case. case 'object': if (this !== window) { if (v) { if (typeof v.toJSONString === 'function') { p(v.toJSONString()); } } else { p("null"); } } break; default: p(v.toJSONString()); } } } // Join all of the fragments together and return. a.push('}'); return a.join(''); }; (function (s) { // Augment String.prototype. We do this in an immediate anonymous function to // avoid defining global variables. // m is a table of character substitutions. var m = { '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"' : '\\"', '\\': '\\\\' }; s.parseJSON = function (filter) { // Parsing happens in three stages. In the first stage, we run the text against // a regular expression which looks for non-JSON characters. We are especially // concerned with '()' and 'new' because they can cause invocation, and '=' // because it can cause mutation. But just to be safe, we will reject all // unexpected characters. try { if (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/. test(this)) { // In the second 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. var j = eval('(' + this + ')'); // In the optional third stage, we recursively walk the new structure, passing // each name/value pair to a filter function for possible transformation. if (typeof filter === 'function') { function walk(k, v) { if (v && typeof v === 'object') { for (var i in v) { if (v.hasOwnProperty(i)) { v[i] = walk(i, v[i]); } } } return filter(k, v); } j = walk('', j); } return j; } } catch (e) { // Fall through if the regexp test fails. } throw new SyntaxError("parseJSON"); }; s.toJSONString = function () { // If the string contains no control characters, no quote characters, and no // backslash characters, then we can simply slap some quotes around it. // Otherwise we must also replace the offending characters with safe // sequences. // add by weberliu @ 2007-4-2 var _self = this.replace("&", "%26"); if (/["\\\x00-\x1f]/.test(this)) { return '"' + _self.replace(/([\x00-\x1f\\"])/g, function(a, b) { var c = m[b]; if (c) { return c; } c = b.charCodeAt(); return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16); }) + '"'; } return '"' + _self + '"'; }; })(String.prototype); } Ajax.onRunning = showLoader; Ajax.onComplete = hideLoader; /* * * 顯示載入信息 */ function showLoader() { document.getElementsByTagName('body').item(0).style.cursor = "wait"; if (top.frames['header-frame'] && top.frames['header-frame'].document.getElementById("load-div")) { top.frames['header-frame'].document.getElementById("load-div").style.display = "block"; } else { var obj = document.getElementById('loader'); if ( ! obj && typeof(process_request) != 'undefined') { obj = document.createElement("DIV"); obj.id = "loader"; obj.innerHTML = process_request; document.body.appendChild(obj); } } } /* * * 隱藏載入信息 */ function hideLoader() { document.getElementsByTagName('body').item(0).style.cursor = "auto"; if (top.frames['header-frame'] && top.frames['header-frame'].document.getElementById("load-div")) { setTimeout(function(){top.frames['header-frame'].document.getElementById("load-div").style.display = "none"}, 10); } else { try { var obj = document.getElementById("loader"); obj.style.display = 'none'; document.body.removeChild(obj); } catch (ex) {} } }
/** * @file transport.js * @description 用於支持AJAX的傳輸類。 * @author ECShop R&D Team ( http://www.ecshop.com/ ) * @date 2007-03-08 Wednesday * @license Licensed under the Academic Free License 2.1 http://www.opensource.org/licenses/afl-2.1.php * @version 1.0.20070308**/
var Transport ={ /* * * 存儲本對象所在的文件名。 * * @static */ filename : "transport.js",
/* * * 存儲是否進入調試模式的開關,打印調試消息的方式,換行符,調試用的容器的ID。 * * @private */ debugging : { isDebugging : 0, debuggingMode : 0, linefeed : "", containerId : 0 },
/* * * 設置調試模式以及打印調試消息方式的方法。 * * @public * @param {int} 是否打開調試模式 0:關閉,1:打開 * @param {int} 打印調試消息的方式 0:alert,1:innerHTML * */ debug : function (isDebugging, debuggingMode) { this.debugging = { "isDebugging" : isDebugging, "debuggingMode" : debuggingMode, "linefeed" : debuggingMode ? "<br />" : "\n", "containerId" : "dubugging-container" + new Date().getTime() }; },
/* * * 傳輸完畢後自動調用的方法,優先級比用戶從run()方法中傳入的回調函數高。 * * @public */ onComplete : function () { },
/* * * 傳輸過程當中自動調用的方法。 * * @public */ onRunning : function () { },
/* * * 調用此方法發送HTTP請求。 * * @public * @param {string} url 請求的URL地址 * @param {mix} params 發送參數 * @param {Function} callback 回調函數 * @param {string} ransferMode 請求的方式,有"GET"和"POST"兩種 * @param {string} responseType 響應類型,有"JSON"、"XML"和"TEXT"三種 * @param {boolean} asyn 是否異步請求的方式 * @param {boolean} quiet 是否安靜模式請求 */ run : function (url, params, callback, transferMode, responseType, asyn, quiet) { /* 處理用戶在調用該方法時輸入的參數 */ params = this.parseParams(params); transferMode = typeof(transferMode) === "string" && transferMode.toUpperCase() === "GET" ? "GET" : "POST";
if (transferMode === "GET") { var d = new Date();
url += params ? (url.indexOf("?") === - 1 ? "?" : "&") + params : ""; url = encodeURI(url) + (url.indexOf("?") === - 1 ? "?" : "&") + d.getTime() + d.getMilliseconds(); params = null; }
responseType = typeof(responseType) === "string" && ((responseType = responseType.toUpperCase()) === "JSON" || responseType === "XML") ? responseType : "TEXT"; asyn = asyn === false ? false : true;
/* 處理HTTP請求和響應 */ var xhr = this.createXMLHttpRequest();
try { var self = this;
if (typeof(self.onRunning) === "function" && !quiet) { self.onRunning(); }
xhr.open(transferMode, url, asyn);
if (transferMode === "POST") { xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); }
if (asyn) { xhr.onreadystatechange = function () { if (xhr.readyState == 4) { switch ( xhr.status ) { case 0: case 200: // OK! /* * If the request was to create a new resource * (such as post an item to the database) * You could instead return a status code of '201 Created' */
if (typeof(self.onComplete) === "function") { self.onComplete(); }
if (typeof(callback) === "function") { callback.call(self, self.parseResult(responseType, xhr), xhr.responseText); } break;
case 304: // Not Modified /* * This would be used when your Ajax widget is * checking for updated content, * such as the Twitter interface. */ break;
case 400: // Bad Request /* * A bit like a safety net for requests by your JS interface * that aren't supported on the server. * "Your browser made a request that the server cannot understand" */ alert("XmlHttpRequest status: [400] Bad Request"); break;
case 404: // Not Found alert("XmlHttpRequest status: [404] \nThe requested URL "+url+" was not found on this server."); break;
case 409: // Conflict /* * Perhaps your JavaScript request attempted to * update a Database record * but failed due to a conflict * (eg: a field that must be unique) */ break;
case 503: // Service Unavailable /* * A resource that this request relies upon * is currently unavailable * (eg: a file is locked by another process) */ alert("XmlHttpRequest status: [503] Service Unavailable"); break;
default: alert("XmlHttpRequest status: [" + xhr.status + "] Unknow status."); }
xhr = null; } } if (xhr != null) xhr.send(params); } else { if (typeof(self.onRunning) === "function") { self.onRunning(); }
xhr.send(params);
var result = self.parseResult(responseType, xhr); //xhr = null;
if (typeof(self.onComplete) === "function") { self.onComplete(); } if (typeof(callback) === "function") { callback.call(self, result, xhr.responseText); }
return result; } } catch (ex) { if (typeof(self.onComplete) === "function") { self.onComplete(); }
alert(this.filename + "/run() error:" + ex.description); } },
/* * * 若是開啓了調試模式,該方法會打印出相應的信息。 * * @private * @param {string} info 調試信息 * @param {string} type 信息類型 */ displayDebuggingInfo : function (info, type) { if ( ! this.debugging.debuggingMode) { alert(info); } else {
var id = this.debugging.containerId; if ( ! document.getElementById(id)) { div = document.createElement("DIV"); div.id = id; div.style.position = "absolute"; div.style.width = "98%"; div.style.border = "1px solid #f00"; div.style.backgroundColor = "#eef"; var pageYOffset = document.body.scrollTop || window.pageYOffset || 0; div.style.top = document.body.clientHeight * 0.6 + pageYOffset + "px"; document.body.appendChild(div); div.innerHTML = "<div></div>" + "<hr style='height:1px;border:1px dashed red;'>" + "<div></div>"; }
var subDivs = div.getElementsByTagName("DIV"); if (type === "param") { subDivs[0].innerHTML = info; } else { subDivs[1].innerHTML = info; } } },
/* * * 建立XMLHttpRequest對象的方法。 * * @private * @return 返回一個XMLHttpRequest對象 * @type Object */ createXMLHttpRequest : function () { var xhr = null;
if (window.ActiveXObject) { var versions = ['Microsoft.XMLHTTP', 'MSXML6.XMLHTTP', 'MSXML5.XMLHTTP', 'MSXML4.XMLHTTP', 'MSXML3.XMLHTTP', 'MSXML2.XMLHTTP', 'MSXML.XMLHTTP'];
for (var i = 0; i < versions.length; i ++ ) { try { xhr = new ActiveXObject(versions[i]); break; } catch (ex) { continue; } } } else { xhr = new XMLHttpRequest(); }
return xhr; },
/* * * 當傳輸過程發生錯誤時將調用此方法。 * * @private * @param {Object} xhr XMLHttpRequest對象 * @param {String} url HTTP請求的地址 */ onXMLHttpRequestError : function (xhr, url) { throw "URL: " + url + "\n" + "readyState: " + xhr.readyState + "\n" + "state: " + xhr.status + "\n" + "headers: " + xhr.getAllResponseHeaders(); },
/* * * 對將要發送的參數進行格式化。 * * @private * @params {mix} params 將要發送的參數 * @return 返回合法的參數 * @type string */ parseParams : function (params) { var legalParams = ""; params = params ? params : "";
if (typeof(params) === "string") { legalParams = params; } else if (typeof(params) === "object") { try { legalParams = "JSON=" + params.toJSONString(); } catch (ex) { alert("Can't stringify JSON!"); return false; } } else { alert("Invalid parameters!"); return false; }
if (this.debugging.isDebugging) { var lf = this.debugging.linefeed, info = "[Original Parameters]" + lf + params + lf + lf + "[Parsed Parameters]" + lf + legalParams;
this.displayDebuggingInfo(info, "param"); }
return legalParams; },
/* * * 對返回的HTTP響應結果進行過濾。 * * @public * @params {mix} result HTTP響應結果 * @return 返回過濾後的結果 * @type string */ preFilter : function (result) { return result.replace(/\xEF\xBB\xBF/g, ""); },
/* * * 對返回的結果進行格式化。 * * @private * @return 返回特定格式的數據結果 * @type mix */ parseResult : function (responseType, xhr) { var result = null;
switch (responseType) { case "JSON" : result = this.preFilter(xhr.responseText); try { result = result.parseJSON(); } catch (ex) { throw this.filename + "/parseResult() error: can't parse to JSON.\n\n" + xhr.responseText; } break; case "XML" : result = xhr.responseXML; break; case "TEXT" : result = this.preFilter(xhr.responseText); break; default : throw this.filename + "/parseResult() error: unknown response type:" + responseType; }
if (this.debugging.isDebugging) { var lf = this.debugging.linefeed, info = "[Response Result of " + responseType + " Format]" + lf + result;
if (responseType === "JSON") { info = "[Response Result of TEXT Format]" + lf + xhr.responseText + lf + lf + info; }
this.displayDebuggingInfo(info, "result"); }
return result; }};
/* 定義兩個別名 */var Ajax = Transport;Ajax.call = Transport.run;
/* json.js 2007-03-06
Public Domain
This file adds these methods to JavaScript:
array.toJSONString() boolean.toJSONString() date.toJSONString() number.toJSONString() object.toJSONString() string.toJSONString() These methods produce a JSON text from a JavaScript value. It must not contain any cyclical references. Illegal values will be excluded.
The default conversion for dates is to an ISO string. You can add a toJSONString method to any date object to get a different representation.
string.parseJSON(filter) This method parses a JSON text to produce an object or array. It can throw a SyntaxError exception.
The optional filter parameter is a function which 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 structure is not modified. If it returns undefined then the member is deleted.
Example:
// Parse the text. If a key contains the string 'date' then // convert the value to a date.
myData = text.parseJSON(function (key, value) { return key.indexOf('date') >= 0 ? new Date(value) : value; });
It is expected that these methods will formally become part of the JavaScript Programming Language in the Fourth Edition of the ECMAScript standard in 2008.*/
// Augment the basic prototypes if they have not already been augmented.
if ( ! Object.prototype.toJSONString) { Array.prototype.toJSONString = function () { var a = ['['], // The array holding the text fragments. b, // A boolean indicating that a comma is required. i, // Loop counter. l = this.length, v; // The value to be stringified.
function p(s) {
// p accumulates text fragments in an array. It inserts a comma before all // except the first fragment.
if (b) { a.push(','); } a.push(s); b = true; }
// For each value in this array...
for (i = 0; i < l; i ++) { v = this[i]; switch (typeof v) {
// Values without a JSON representation are ignored.
case 'undefined': case 'function': case 'unknown': break;
// Serialize a JavaScript object value. Ignore objects thats lack the // toJSONString method. Due to a specification error in ECMAScript, // typeof null is 'object', so watch out for that case.
case 'object': if (v) { if (typeof v.toJSONString === 'function') { p(v.toJSONString()); } } else { p("null"); } break;
// Otherwise, serialize the value.
default: p(v.toJSONString()); } }
// Join all of the fragments together and return.
a.push(']'); return a.join(''); };
Boolean.prototype.toJSONString = function () { return String(this); };
Date.prototype.toJSONString = function () {
// Ultimately, this method will be equivalent to the date.toISOString method.
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n; }
return '"' + this.getFullYear() + '-' + f(this.getMonth() + 1) + '-' + f(this.getDate()) + 'T' + f(this.getHours()) + ':' + f(this.getMinutes()) + ':' + f(this.getSeconds()) + '"'; };
Number.prototype.toJSONString = function () {
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(this) ? String(this) : "null"; };
Object.prototype.toJSONString = function () { var a = ['{'], // The array holding the text fragments. b, // A boolean indicating that a comma is required. k, // The current key. v; // The current value.
function p(s) {
// p accumulates text fragment pairs in an array. It inserts a comma before all // except the first fragment pair.
if (b) { a.push(','); } a.push(k.toJSONString(), ':', s); b = true; }
// Iterate through all of the keys in the object, ignoring the proto chain.
for (k in this) { if (this.hasOwnProperty(k)) { v = this[k]; switch (typeof v) {
// Values without a JSON representation are ignored.
case 'undefined': case 'function': case 'unknown': break;
// Serialize a JavaScript object value. Ignore objects that lack the // toJSONString method. Due to a specification error in ECMAScript, // typeof null is 'object', so watch out for that case.
case 'object': if (this !== window) { if (v) { if (typeof v.toJSONString === 'function') { p(v.toJSONString()); } } else { p("null"); } } break; default: p(v.toJSONString()); } } }
// Join all of the fragments together and return.
a.push('}'); return a.join(''); };
(function (s) {
// Augment String.prototype. We do this in an immediate anonymous function to // avoid defining global variables.
// m is a table of character substitutions.
var m = { '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"' : '\\"', '\\': '\\\\' };
s.parseJSON = function (filter) {
// Parsing happens in three stages. In the first stage, we run the text against // a regular expression which looks for non-JSON characters. We are especially // concerned with '()' and 'new' because they can cause invocation, and '=' // because it can cause mutation. But just to be safe, we will reject all // unexpected characters.
try { if (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/. test(this)) {
// In the second 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.
var j = eval('(' + this + ')');
// In the optional third stage, we recursively walk the new structure, passing // each name/value pair to a filter function for possible transformation.
if (typeof filter === 'function') {
function walk(k, v) { if (v && typeof v === 'object') { for (var i in v) { if (v.hasOwnProperty(i)) { v[i] = walk(i, v[i]); } } } return filter(k, v); }
j = walk('', j); } return j; } } catch (e) {
// Fall through if the regexp test fails.
} throw new SyntaxError("parseJSON"); };
s.toJSONString = function () {
// If the string contains no control characters, no quote characters, and no // backslash characters, then we can simply slap some quotes around it. // Otherwise we must also replace the offending characters with safe // sequences.
// add by weberliu @ 2007-4-2 var _self = this.replace("&", "%26");
if (/["\\\x00-\x1f]/.test(this)) { return '"' + _self.replace(/([\x00-\x1f\\"])/g, function(a, b) { var c = m[b]; if (c) { return c; } c = b.charCodeAt(); return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16); }) + '"'; } return '"' + _self + '"'; }; })(String.prototype);}
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