Struts example source code file (BrowserIO.js)
The Struts BrowserIO.js source code/*
Copyright (c) 2004-2006, The Dojo Foundation
All Rights Reserved.
Licensed under the Academic Free License version 2.1 or above OR the
modified BSD license. For more information on Dojo licensing, see:
http://dojotoolkit.org/community/licensing.shtml
*/
dojo.provide("dojo.io.BrowserIO");
dojo.require("dojo.io.common");
dojo.require("dojo.lang.array");
dojo.require("dojo.lang.func");
dojo.require("dojo.string.extras");
dojo.require("dojo.dom");
dojo.require("dojo.undo.browser");
if (!dj_undef("window")) {
dojo.io.checkChildrenForFile = function (node) {
var hasFile = false;
var inputs = node.getElementsByTagName("input");
dojo.lang.forEach(inputs, function (input) {
if (hasFile) {
return;
}
if (input.getAttribute("type") == "file") {
hasFile = true;
}
});
return hasFile;
};
dojo.io.formHasFile = function (formNode) {
return dojo.io.checkChildrenForFile(formNode);
};
dojo.io.updateNode = function (node, urlOrArgs) {
node = dojo.byId(node);
var args = urlOrArgs;
if (dojo.lang.isString(urlOrArgs)) {
args = {url:urlOrArgs};
}
args.mimetype = "text/html";
args.load = function (t, d, e) {
while (node.firstChild) {
dojo.dom.destroyNode(node.firstChild);
}
node.innerHTML = d;
};
dojo.io.bind(args);
};
dojo.io.formFilter = function (node) {
var type = (node.type || "").toLowerCase();
return !node.disabled && node.name && !dojo.lang.inArray(["file", "submit", "image", "reset", "button"], type);
};
dojo.io.encodeForm = function (formNode, encoding, formFilter) {
if ((!formNode) || (!formNode.tagName) || (!formNode.tagName.toLowerCase() == "form")) {
dojo.raise("Attempted to encode a non-form element.");
}
if (!formFilter) {
formFilter = dojo.io.formFilter;
}
var enc = /utf/i.test(encoding || "") ? encodeURIComponent : dojo.string.encodeAscii;
var values = [];
for (var i = 0; i < formNode.elements.length; i++) {
var elm = formNode.elements[i];
if (!elm || elm.tagName.toLowerCase() == "fieldset" || !formFilter(elm)) {
continue;
}
var name = enc(elm.name);
var type = elm.type.toLowerCase();
if (type == "select-multiple") {
for (var j = 0; j < elm.options.length; j++) {
if (elm.options[j].selected) {
values.push(name + "=" + enc(elm.options[j].value));
}
}
} else {
if (dojo.lang.inArray(["radio", "checkbox"], type)) {
if (elm.checked) {
values.push(name + "=" + enc(elm.value));
}
} else {
values.push(name + "=" + enc(elm.value));
}
}
}
var inputs = formNode.getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
var input = inputs[i];
if (input.type.toLowerCase() == "image" && input.form == formNode && formFilter(input)) {
var name = enc(input.name);
values.push(name + "=" + enc(input.value));
values.push(name + ".x=0");
values.push(name + ".y=0");
}
}
return values.join("&") + "&";
};
dojo.io.FormBind = function (args) {
this.bindArgs = {};
if (args && args.formNode) {
this.init(args);
} else {
if (args) {
this.init({formNode:args});
}
}
};
dojo.lang.extend(dojo.io.FormBind, {form:null, bindArgs:null, clickedButton:null, init:function (args) {
var form = dojo.byId(args.formNode);
if (!form || !form.tagName || form.tagName.toLowerCase() != "form") {
throw new Error("FormBind: Couldn't apply, invalid form");
} else {
if (this.form == form) {
return;
} else {
if (this.form) {
throw new Error("FormBind: Already applied to a form");
}
}
}
dojo.lang.mixin(this.bindArgs, args);
this.form = form;
this.connect(form, "onsubmit", "submit");
for (var i = 0; i < form.elements.length; i++) {
var node = form.elements[i];
if (node && node.type && dojo.lang.inArray(["submit", "button"], node.type.toLowerCase())) {
this.connect(node, "onclick", "click");
}
}
var inputs = form.getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
var input = inputs[i];
if (input.type.toLowerCase() == "image" && input.form == form) {
this.connect(input, "onclick", "click");
}
}
}, onSubmit:function (form) {
return true;
}, submit:function (e) {
e.preventDefault();
if (this.onSubmit(this.form)) {
dojo.io.bind(dojo.lang.mixin(this.bindArgs, {formFilter:dojo.lang.hitch(this, "formFilter")}));
}
}, click:function (e) {
var node = e.currentTarget;
if (node.disabled) {
return;
}
this.clickedButton = node;
}, formFilter:function (node) {
var type = (node.type || "").toLowerCase();
var accept = false;
if (node.disabled || !node.name) {
accept = false;
} else {
if (dojo.lang.inArray(["submit", "button", "image"], type)) {
if (!this.clickedButton) {
this.clickedButton = node;
}
accept = node == this.clickedButton;
} else {
accept = !dojo.lang.inArray(["file", "submit", "reset", "button"], type);
}
}
return accept;
}, connect:function (srcObj, srcFcn, targetFcn) {
if (dojo.evalObjPath("dojo.event.connect")) {
dojo.event.connect(srcObj, srcFcn, this, targetFcn);
} else {
var fcn = dojo.lang.hitch(this, targetFcn);
srcObj[srcFcn] = function (e) {
if (!e) {
e = window.event;
}
if (!e.currentTarget) {
e.currentTarget = e.srcElement;
}
if (!e.preventDefault) {
e.preventDefault = function () {
window.event.returnValue = false;
};
}
fcn(e);
};
}
}});
dojo.io.XMLHTTPTransport = new function () {
var _this = this;
var _cache = {};
this.useCache = false;
this.preventCache = false;
function getCacheKey(url, query, method) {
return url + "|" + query + "|" + method.toLowerCase();
}
function addToCache(url, query, method, http) {
_cache[getCacheKey(url, query, method)] = http;
}
function getFromCache(url, query, method) {
return _cache[getCacheKey(url, query, method)];
}
this.clearCache = function () {
_cache = {};
};
function doLoad(kwArgs, http, url, query, useCache) {
if (((http.status >= 200) && (http.status < 300)) || (http.status == 304) || (http.status == 1223) || (location.protocol == "file:" && (http.status == 0 || http.status == undefined)) || (location.protocol == "chrome:" && (http.status == 0 || http.status == undefined))) {
var ret;
if (kwArgs.method.toLowerCase() == "head") {
var headers = http.getAllResponseHeaders();
ret = {};
ret.toString = function () {
return headers;
};
var values = headers.split(/[\r\n]+/g);
for (var i = 0; i < values.length; i++) {
var pair = values[i].match(/^([^:]+)\s*:\s*(.+)$/i);
if (pair) {
ret[pair[1]] = pair[2];
}
}
} else {
if (kwArgs.mimetype == "text/javascript") {
try {
ret = dj_eval(http.responseText);
}
catch (e) {
dojo.debug(e);
dojo.debug(http.responseText);
ret = null;
}
} else {
if (kwArgs.mimetype.substr(0, 9) == "text/json" || kwArgs.mimetype.substr(0, 16) == "application/json") {
try {
ret = dj_eval("(" + kwArgs.jsonFilter(http.responseText) + ")");
}
catch (e) {
dojo.debug(e);
dojo.debug(http.responseText);
ret = false;
}
} else {
if ((kwArgs.mimetype == "application/xml") || (kwArgs.mimetype == "text/xml")) {
ret = http.responseXML;
if (!ret || typeof ret == "string" || !http.getResponseHeader("Content-Type")) {
ret = dojo.dom.createDocumentFromText(http.responseText);
}
} else {
ret = http.responseText;
}
}
}
}
if (useCache) {
addToCache(url, query, kwArgs.method, http);
}
kwArgs[(typeof kwArgs.load == "function") ? "load" : "handle"]("load", ret, http, kwArgs);
} else {
var errObj = new dojo.io.Error("XMLHttpTransport Error: " + http.status + " " + http.statusText);
kwArgs[(typeof kwArgs.error == "function") ? "error" : "handle"]("error", errObj, http, kwArgs);
}
}
function setHeaders(http, kwArgs) {
if (kwArgs["headers"]) {
for (var header in kwArgs["headers"]) {
if (header.toLowerCase() == "content-type" && !kwArgs["contentType"]) {
kwArgs["contentType"] = kwArgs["headers"][header];
} else {
http.setRequestHeader(header, kwArgs["headers"][header]);
}
}
}
}
this.inFlight = [];
this.inFlightTimer = null;
this.startWatchingInFlight = function () {
if (!this.inFlightTimer) {
this.inFlightTimer = setTimeout("dojo.io.XMLHTTPTransport.watchInFlight();", 10);
}
};
this.watchInFlight = function () {
var now = null;
if (!dojo.hostenv._blockAsync && !_this._blockAsync) {
for (var x = this.inFlight.length - 1; x >= 0; x--) {
try {
var tif = this.inFlight[x];
if (!tif || tif.http._aborted || !tif.http.readyState) {
this.inFlight.splice(x, 1);
continue;
}
if (4 == tif.http.readyState) {
this.inFlight.splice(x, 1);
doLoad(tif.req, tif.http, tif.url, tif.query, tif.useCache);
} else {
if (tif.startTime) {
if (!now) {
now = (new Date()).getTime();
}
if (tif.startTime + (tif.req.timeoutSeconds * 1000) < now) {
if (typeof tif.http.abort == "function") {
tif.http.abort();
}
this.inFlight.splice(x, 1);
tif.req[(typeof tif.req.timeout == "function") ? "timeout" : "handle"]("timeout", null, tif.http, tif.req);
}
}
}
}
catch (e) {
try {
var errObj = new dojo.io.Error("XMLHttpTransport.watchInFlight Error: " + e);
tif.req[(typeof tif.req.error == "function") ? "error" : "handle"]("error", errObj, tif.http, tif.req);
}
catch (e2) {
dojo.debug("XMLHttpTransport error callback failed: " + e2);
}
}
}
}
clearTimeout(this.inFlightTimer);
if (this.inFlight.length == 0) {
this.inFlightTimer = null;
return;
}
this.inFlightTimer = setTimeout("dojo.io.XMLHTTPTransport.watchInFlight();", 10);
};
var hasXmlHttp = dojo.hostenv.getXmlhttpObject() ? true : false;
this.canHandle = function (kwArgs) {
var mlc = kwArgs["mimetype"].toLowerCase() || "";
return hasXmlHttp && ((dojo.lang.inArray(["text/plain", "text/html", "application/xml", "text/xml", "text/javascript"], mlc)) || (mlc.substr(0, 9) == "text/json" || mlc.substr(0, 16) == "application/json")) && !(kwArgs["formNode"] && dojo.io.formHasFile(kwArgs["formNode"]));
};
this.multipartBoundary = "45309FFF-BD65-4d50-99C9-36986896A96F";
this.bind = function (kwArgs) {
if (!kwArgs["url"]) {
if (!kwArgs["formNode"] && (kwArgs["backButton"] || kwArgs["back"] || kwArgs["changeUrl"] || kwArgs["watchForURL"]) && (!djConfig.preventBackButtonFix)) {
dojo.deprecated("Using dojo.io.XMLHTTPTransport.bind() to add to browser history without doing an IO request", "Use dojo.undo.browser.addToHistory() instead.", "0.4");
dojo.undo.browser.addToHistory(kwArgs);
return true;
}
}
var url = kwArgs.url;
var query = "";
if (kwArgs["formNode"]) {
var ta = kwArgs.formNode.getAttribute("action");
if ((ta) && (!kwArgs["url"])) {
url = ta;
}
var tp = kwArgs.formNode.getAttribute("method");
if ((tp) && (!kwArgs["method"])) {
kwArgs.method = tp;
}
query += dojo.io.encodeForm(kwArgs.formNode, kwArgs.encoding, kwArgs["formFilter"]);
}
if (url.indexOf("#") > -1) {
dojo.debug("Warning: dojo.io.bind: stripping hash values from url:", url);
url = url.split("#")[0];
}
if (kwArgs["file"]) {
kwArgs.method = "post";
}
if (!kwArgs["method"]) {
kwArgs.method = "get";
}
if (kwArgs.method.toLowerCase() == "get") {
kwArgs.multipart = false;
} else {
if (kwArgs["file"]) {
kwArgs.multipart = true;
} else {
if (!kwArgs["multipart"]) {
kwArgs.multipart = false;
}
}
}
if (kwArgs["backButton"] || kwArgs["back"] || kwArgs["changeUrl"]) {
dojo.undo.browser.addToHistory(kwArgs);
}
var content = kwArgs["content"] || {};
if (kwArgs.sendTransport) {
content["dojo.transport"] = "xmlhttp";
}
do {
if (kwArgs.postContent) {
query = kwArgs.postContent;
break;
}
if (content) {
query += dojo.io.argsFromMap(content, kwArgs.encoding);
}
if (kwArgs.method.toLowerCase() == "get" || !kwArgs.multipart) {
break;
}
var t = [];
if (query.length) {
var q = query.split("&");
for (var i = 0; i < q.length; ++i) {
if (q[i].length) {
var p = q[i].split("=");
t.push("--" + this.multipartBoundary, "Content-Disposition: form-data; name=\"" + p[0] + "\"", "", p[1]);
}
}
}
if (kwArgs.file) {
if (dojo.lang.isArray(kwArgs.file)) {
for (var i = 0; i < kwArgs.file.length; ++i) {
var o = kwArgs.file[i];
t.push("--" + this.multipartBoundary, "Content-Disposition: form-data; name=\"" + o.name + "\"; filename=\"" + ("fileName" in o ? o.fileName : o.name) + "\"", "Content-Type: " + ("contentType" in o ? o.contentType : "application/octet-stream"), "", o.content);
}
} else {
var o = kwArgs.file;
t.push("--" + this.multipartBoundary, "Content-Disposition: form-data; name=\"" + o.name + "\"; filename=\"" + ("fileName" in o ? o.fileName : o.name) + "\"", "Content-Type: " + ("contentType" in o ? o.contentType : "application/octet-stream"), "", o.content);
}
}
if (t.length) {
t.push("--" + this.multipartBoundary + "--", "");
query = t.join("\r\n");
}
} while (false);
var async = kwArgs["sync"] ? false : true;
var preventCache = kwArgs["preventCache"] || (this.preventCache == true && kwArgs["preventCache"] != false);
var useCache = kwArgs["useCache"] == true || (this.useCache == true && kwArgs["useCache"] != false);
if (!preventCache && useCache) {
var cachedHttp = getFromCache(url, query, kwArgs.method);
if (cachedHttp) {
doLoad(kwArgs, cachedHttp, url, query, false);
return;
}
}
var http = dojo.hostenv.getXmlhttpObject(kwArgs);
var received = false;
if (async) {
var startTime = this.inFlight.push({"req":kwArgs, "http":http, "url":url, "query":query, "useCache":useCache, "startTime":kwArgs.timeoutSeconds ? (new Date()).getTime() : 0});
this.startWatchingInFlight();
} else {
_this._blockAsync = true;
}
if (kwArgs.method.toLowerCase() == "post") {
if (!kwArgs.user) {
http.open("POST", url, async);
} else {
http.open("POST", url, async, kwArgs.user, kwArgs.password);
}
setHeaders(http, kwArgs);
http.setRequestHeader("Content-Type", kwArgs.multipart ? ("multipart/form-data; boundary=" + this.multipartBoundary) : (kwArgs.contentType || "application/x-www-form-urlencoded"));
try {
http.send(query);
}
catch (e) {
if (typeof http.abort == "function") {
http.abort();
}
doLoad(kwArgs, {status:404}, url, query, useCache);
}
} else {
var tmpUrl = url;
if (query != "") {
tmpUrl += (tmpUrl.indexOf("?") > -1 ? "&" : "?") + query;
}
if (preventCache) {
tmpUrl += (dojo.string.endsWithAny(tmpUrl, "?", "&") ? "" : (tmpUrl.indexOf("?") > -1 ? "&" : "?")) + "dojo.preventCache=" + new Date().valueOf();
}
if (!kwArgs.user) {
http.open(kwArgs.method.toUpperCase(), tmpUrl, async);
} else {
http.open(kwArgs.method.toUpperCase(), tmpUrl, async, kwArgs.user, kwArgs.password);
}
setHeaders(http, kwArgs);
try {
http.send(null);
}
catch (e) {
if (typeof http.abort == "function") {
http.abort();
}
doLoad(kwArgs, {status:404}, url, query, useCache);
}
}
if (!async) {
doLoad(kwArgs, http, url, query, useCache);
_this._blockAsync = false;
}
kwArgs.abort = function () {
try {
http._aborted = true;
}
catch (e) {
}
return http.abort();
};
return;
};
dojo.io.transports.addTransport("XMLHTTPTransport");
};
}
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