的另一種方法,代替通過.always()
過濾反應最初,然後調用.done()
.fail()
或通過濾波延遲直接調用.done()
.fail()
或;維護處理實際淨誤差與同fail()
回調的能力
// simulate server-side responses
var error = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<item>"
+ "<name>message</name>"
+ "<value>Invalid input data</value>"
+ "</item>";
var success = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<item>"
+ "<name>message</name>"
+ "<value>Success</value>" + "</item>";
// params
$.ajaxSetup({
beforeSend : function(jqxhr, settings) {
var d = decodeURIComponent(settings.data)
.match(/data=+.*/)[0]
.split(/=|&/);
var params = {};
params[d[0]] = {};
params[d[0]][d[1]] = d[2];
params[d[0]][d[3]] = d[4];
jqxhr.data = params;
}
});
var request = function (url, _xmlResponse, data1, data2) {
var _response = new $.Deferred(),
_request = $.ajax({
url: url,
type: "POST",
data: {
// responses
xml: _xmlResponse,
// params
data: "param1="+ data1 +"¶m2="+ data2
},
dataType: "xml"
});
// check `responseText` for "Invalid" ,
// check `textStatus` for actual net error , "error"
_request.always(function (xml, textStatus, jqxhr) {
console.log(xml, textStatus, jqxhr, "check");
// simulate server-side processing, cont.
// if both object passed to server ,
// `param1` and `param2` _do not_ have property
// with value of at `params` , `""` empty string - generic "error" ,
// _and_ returned `responseText` contain "Invalid" ,
// _or_ `textStatus` : `error` , `reject` `dfd` , call `.fail()`
// else `resolve `dfd` , call `.done()`
// check params
var test = [xml["data"] || jqxhr["data"]].every(function(v, k) {
return !(v.data["param1"] !== "" && v.data["param2"] !== "")
}) ;
// check `xml` responseText for node for "Invalid" text ,
// generate `.fail()`
var check = $(xml.children)
.find("value").is(":contains(Invalid)");
return check && test || textStatus === "error"
// call `.fail()`
? _response.reject([xml, textStatus, jqxhr])
// call `.done()`
: _response.resolve([xml, textStatus, jqxhr])
});
return _response
.done(function (xml) {
// do `done()` stuff
console.log(xml[0], xml[1], xml[2]);
var msg = $(xml[0].children).find("value").html();
$("#success")
.html(msg + ", "
+ xml[2].data.data.param1
+ xml[2].data.data.param2
);
return this.promise()
})
.fail(function (xml) {
// do `.fail()` stuff
console.log(xml[0], xml[1], xml[2], "fail");
var msg = $(xml[0].children).find("value").html()
|| xml[1] + ", " + xml[2];
$("#error")
.html(msg);
return this.promise()
});
};
然後可以調用request()
,沒有_xmlResponse
PARAM,應同時處理產生.fail()
(如果responseText
含有「無效」)和淨誤差.fail()
呼叫(例如,statusCode
500
; textStatus
error
)和.done()
呼叫。
request("someAction.do", "param1_param", "param2_param");
任選地,鏈返回promise
從request
在.always()
,作爲包含request
返回值data
陣列;在.done()
或fail()
request("someAction.do", "param1_param", "param2_param")
.always(function(data) {
// do `.done()` , `.fail()` stuff ,
// `data, textStatus, jqxhr`
console.log(data[0], data[1], data[2])
})
的jsfiddle http://jsfiddle.net/guest271314/ek15krb5/
不'錯誤'片段將'header'響應代碼設置爲'500'?謝謝 – guest271314 2014-11-03 15:36:55
你是什麼意思?我如何設置狀態?我編碼response.setHeader(「狀態」,「500」);然後response.setStatus(500);因爲我不知道哪一個更好。我是一個前端Java超級管理員。謝謝 – 2014-11-03 16:21:26
看到http://www.javamex.com/tutorials/servlets/http_status_code.shtml – guest271314 2014-11-03 16:35:09