browserio.js

初学者

								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");
	};
}