如果内容为空，jQuery ajax 调用返回空错误
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jQuery ajax call returns empty error if the content is empty
提问by user2632980
I call the getResult()function everytime when res.reply = 2, but there are cases that resis empty. When the returned value is empty console.log("error")is invoked. This works in older versions of jQuery Mobile. Now the version is 1.3.2.
我getResult()每次 whenres.reply = 2都调用该函数，但有些情况下res是空的。当返回值为空时console.log("error")调用。这适用于旧版本的jQuery Mobile。现在版本是1.3.2。
function getResult()
{
request = $.ajax({
type: "POST",
url: url,
dataType: "json",
data: {
....
},
error: function() {
console.log("error");
},
success: function(res) {
if(res.reply=='2') {
getResult();
}
}
});
}
回答by Mr.Manhattan
dataType: "json"
means: give me json, nothing else. an empty string is not json, so recieving an empty string means that it wasn't a success...
意思是：给我 json，别无他物。空字符串不是 json，因此收到空字符串意味着它不成功......
request = $.ajax({
type: "POST",
url: url,
data: {
....
},
error: function() {
console.log("error");
},
success: function(res) {
var response = jQuery.parseJSON(res);
if(typeof response == 'object'){
if(response.reply == '2') {
getResult();
}
} else {
//response is empty
}
}
});
回答by Hymanocnr
Looks like normally you do want a JSON response, so I wouldn't change your dataType to "text", instead I would get the server to return a valid JSON response even when the response is empty e.g. "{}" instead of "".
看起来通常你确实想要一个 JSON 响应，所以我不会将你的 dataType 更改为“text”，相反，即使响应为空，我也会让服务器返回有效的 JSON 响应，例如“{}”而不是“” .
