connection.js

原名JSPackager

YAHOO.util.Connect = {_msxml_progid:["MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"], _http_header:{}, _has_http_headers:false, _default_post_header:true, _isFormSubmit:false, _isFileUpload:false, _formNode:null, _sFormData:null, _poll:[], _timeOut:[], _polling_interval:50, _transaction_id:0, setProgId:function (id) {this._msxml_progid.unshift(id);}, setDefaultPostHeader:function (b) {this._default_post_header = b;}, setPollingInterval:function (i) {if (typeof i == "number" && isFinite(i)) {this._polling_interval = i;}}, createXhrObject:function (transactionId) {var obj, http;try {http = new XMLHttpRequest();obj = {conn:http, tId:transactionId};}catch (e) {for (var i = 0; i < this._msxml_progid.length; ++i) {try {http = new ActiveXObject(this._msxml_progid[i]);obj = {conn:http, tId:transactionId};break;}catch (e) {}}}finally {return obj;}}, getConnectionObject:function () {var o;var tId = this._transaction_id;try {o = this.createXhrObject(tId);if (o) {this._transaction_id++;
}}catch (e) {}finally {return o;}}, asyncRequest:function (method, uri, callback, postData) {var o = this.getConnectionObject();if (!o) {return null;} else {if (this._isFormSubmit) {if (this._isFileUpload) {this.uploadFile(o.tId, callback, uri);this.releaseObject(o);return;}if (method == "GET") {uri += "?" + this._sFormData;} else {if (method == "POST") {postData = this._sFormData;}}this._sFormData = "";}o.conn.open(method, uri, true);if (this._isFormSubmit || (postData && this._default_post_header)) {this.initHeader("Content-Type", "application/x-www-form-urlencoded");if (this._isFormSubmit) {this._isFormSubmit = false;}}if (this._has_http_headers) {this.setHeader(o);}this.handleReadyState(o, callback);postData ? o.conn.send(postData) : o.conn.send(null);return o;}}, handleReadyState:function (o, callback) {var timeOut = callback.timeout;var oConn = this;try {if (timeOut !== undefined) {this._timeOut[o.tId] = window.setTimeout(function () {oConn.abort(o, callback, true);}, timeOut);}this._poll[o.tId] = window.setInterval(function () {if (o.conn && o.conn.readyState == 4) {
window.clearInterval(oConn._poll[o.tId]);oConn._poll.splice(o.tId);if (timeOut) {oConn._timeOut.splice(o.tId);}oConn.handleTransactionResponse(o, callback);}}, this._polling_interval);}catch (e) {window.clearInterval(oConn._poll[o.tId]);oConn._poll.splice(o.tId);if (timeOut) {oConn._timeOut.splice(o.tId);}oConn.handleTransactionResponse(o, callback);}}, handleTransactionResponse:function (o, callback, isAbort) {if (!callback) {this.releaseObject(o);return;}var httpStatus, responseObject;try {if (o.conn.status !== undefined && o.conn.status != 0) {httpStatus = o.conn.status;} else {httpStatus = 13030;}}catch (e) {httpStatus = 13030;}if (httpStatus >= 200 && httpStatus < 300) {responseObject = this.createResponseObject(o, callback.argument);if (callback.success) {if (!callback.scope) {callback.success(responseObject);} else {callback.success.apply(callback.scope, [responseObject]);}}} else {switch (httpStatus) {
case 12002:case 12029:case 12030:case 12031:case 12152:case 13030:responseObject = this.createExceptionObject(o.tId, callback.argument, isAbort);if (callback.failure) {if (!callback.scope) {callback.failure(responseObject);} else {callback.failure.apply(callback.scope, [responseObject]);}}break;default:responseObject = this.createResponseObject(o, callback.argument);if (callback.failure) {if (!callback.scope) {callback.failure(responseObject);} else {callback.failure.apply(callback.scope, [responseObject]);
}}}}this.releaseObject(o);}, createResponseObject:function (o, callbackArg) {var obj = {};var headerObj = {};try {var headerStr = o.conn.getAllResponseHeaders();var header = headerStr.split("\n");for (var i = 0; i < header.length; i++) {var delimitPos = header[i].indexOf(":");if (delimitPos != -1) {headerObj[header[i].substring(0, delimitPos)] = header[i].substring(delimitPos + 2);}}}catch (e) {}obj.tId = o.tId;obj.status = o.conn.status;obj.statusText = o.conn.statusText;obj.getResponseHeader = headerObj;obj.getAllResponseHeaders = headerStr;obj.responseText = o.conn.responseText;obj.responseXML = o.conn.responseXML;if (typeof callbackArg !== undefined) {
obj.argument = callbackArg;}return obj;}, createExceptionObject:function (tId, callbackArg, isAbort) {var COMM_CODE = 0;var COMM_ERROR = "communication failure";var ABORT_CODE = -1;var ABORT_ERROR = "transaction aborted";var obj = {};obj.tId = tId;if (isAbort) {obj.status = ABORT_CODE;obj.statusText = ABORT_ERROR;} else {obj.status = COMM_CODE;obj.statusText = COMM_ERROR;}if (callbackArg) {obj.argument = callbackArg;}return obj;}, initHeader:function (label, value) {if (this._http_header[label] === undefined) {this._http_header[label] = value;} else {this._http_header[label] = value + "," + this._http_header[label];}this._has_http_headers = true;}, setHeader:function (o) {for (var prop in this._http_header) {if (this._http_header.propertyIsEnumerable) {o.conn.setRequestHeader(prop, this._http_header[prop]);}}delete this._http_header;this._http_header = {};this._has_http_headers = false;}, setForm:function (formId, isUpload, secureUri) {this._sFormData = "";if (typeof formId == "string") {var oForm = (document.getElementById(formId) || document.forms[formId]);} else {if (typeof formId == "object") {var oForm = formId;} else {return;}}if (isUpload) {(typeof secureUri == "string") ? this.createFrame(secureUri) : this.createFrame();this._isFormSubmit = true;this._isFileUpload = true;this._formNode = oForm;
return;}var oElement, oName, oValue, oDisabled;var hasSubmit = false;for (var i = 0; i < oForm.elements.length; i++) {oDisabled = oForm.elements[i].disabled;oElement = oForm.elements[i];oName = oForm.elements[i].name;oValue = oForm.elements[i].value;if (!oDisabled && oName) {switch (oElement.type) {case "select-one":case "select-multiple":for (var j = 0; j < oElement.options.length; j++) {if (oElement.options[j].selected) {this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oElement.options[j].value || oElement.options[j].text) + "&";}}break;case "radio":case "checkbox":if (oElement.checked) {this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";}break;case "file":case undefined:
case "reset":case "button":break;case "submit":if (hasSubmit == false) {this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";hasSubmit = true;}break;default:this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";break;}}}this._isFormSubmit = true;this._sFormData = this._sFormData.substr(0, this._sFormData.length - 1);}, createFrame:function (secureUri) {if (window.ActiveXObject) {var io = document.createElement("<IFRAME name=\"ioFrame\" id=\"ioFrame\">");if (secureUri) {io.src = secureUri;}} else {var io = document.createElement("IFRAME");io.id = "ioFrame";io.name = "ioFrame";}io.style.position = "absolute";io.style.top = "-1000px";
io.style.left = "-1000px";document.body.appendChild(io);}, uploadFile:function (id, callback, uri) {this._formNode.action = uri;this._formNode.enctype = "multipart/form-data";this._formNode.method = "POST";this._formNode.target = "ioFrame";this._formNode.submit();this._formNode = null;this._isFileUpload = false;this._isFormSubmit = false;var uploadCallback = function () {var oResponse = {tId:id, responseText:document.getElementById("ioFrame").contentWindow.document.body.innerHTML, argument:callback.argument};if (callback.upload) {if (!callback.scope) {callback.upload(oResponse);} else {callback.upload.apply(callback.scope, [oResponse]);}}YAHOO.util.Event.removeListener("ioFrame", "load", uploadCallback);window.ioFrame.location.replace("#");setTimeout("document.body.removeChild(document.getElementById('ioFrame'))", 100);};YAHOO.util.Event.addListener("ioFrame", "load", uploadCallback);
}, abort:function (o, callback, isTimeout) {if (this.isCallInProgress(o)) {window.clearInterval(this._poll[o.tId]);this._poll.splice(o.tId);if (isTimeout) {this._timeOut.splice(o.tId);}o.conn.abort();this.handleTransactionResponse(o, callback, true);return true;} else {return false;}}, isCallInProgress:function (o) {if (o.conn) {return o.conn.readyState != 4 && o.conn.readyState != 0;} else {return false;}}, releaseObject:function (o) {o.conn = null;o = null;}};