javascript - JQuery，在使用 promise 之前删除一行

Question

我正在使用一个rest api，出于安全原因，答案有一个前缀，我无法更改此格式。示例:

throw 'allowIllegalResourceCall is false.';
{
  "searchResult" : [ {
    "name" : "stackoverflow",
    "found" : true
  } ]
}

我的请求应该返回一个 promise ，但我想删除第一行>抛出'allowIllegalResourceCall is false.';<.我的函数定义为:

var searchAPI = function() {

var errorFunction = function errorFunction(x) {
    console.log("searchError:");
    console.log(x);
};
var successFunction = function successFunction(x) {
    console.log("searchSuccess:");
    console.log(x);
};
var parse = function(data) {
    var escaped = data.responseText.replace(/^throw [^;]*;/, '');
    console.log("parsed:");
    console.log(JSON.parse(escaped));
    return JSON.parse(escaped);
};

var fn = function() {

    var searchFor = $j('#searchfield').val();

    console.log("prepare ajay, with: "+searchFor);

    var promise = $j.ajax({
        url : "/service/rest/stackoverflow/search",
        type : "get",
        data : {
            "query" : searchFor
        },
        success: function(data, textStatus, xhr) {
            console.log('parse');
            console.log(data);
            return parse(data);
        },
        // only for debbuging purpose
        error: function(data, textStatus, xhr) {
            console.log('parse');
            console.log(data);
            return parse(data);
        }
    });

    promise.done(successFunction);
    promise.fail(errorFunction);
    // promise.always(alwaysFunction);
}
return fn;

};

对于每个请求都会调用错误，我不知道为什么，http状态是200(这意味着OK)

浏览器日志如下所示:

parse
Object {readyState: 4, setRequestHeader: function, getAllResponseHeaders: function, getResponseHeader: function, overrideMimeType: function…}
parsed:
Object {"searchResult": Array[1]}
searchError:
Object {readyState: 4, setRequestHeader: function, getAllResponseHeaders: function, getResponseHeader: function, overrideMimeType: function…}

请求似乎有效，但是为什么会调用错误函数？以及怎么可能 我修好这个吗？我的失败在哪里？

编辑:我发现以下问题，返回值应解析为 json，此时无效:

parsererror 
SyntaxError {stack: (...), message: "Unexpected token h"}

Answer 1

终于解决了，需要一个dataFilter :

var searchAPI = function() {

var errorFunction = function errorFunction(x) {
    console.log("searchError:");
    console.log(x);
};
var successFunction = function successFunction(x) {
    console.log("searchSuccess:");
    console.log(x);
};
var parse = function(data) {
    var escaped = data.responseText.replace(/^throw [^;]*;/, '');
    return escaped;
};

var fn = function() {

    var searchFor = $j('#searchfield').val();

    console.log("prepare ajay, with: "+searchFor);

    var promise = $j.ajax({
        url : "/service/rest/stackoverflow/search",
        type : "get",
        data : {
            "query" : searchFor
        },
        dataFilter: function (data, type)
             {
                  return parse(data, type);
             },
    });

    promise.done(successFunction);
    promise.fail(errorFunction);
    // promise.always(alwaysFunction);
}
return fn;

};