【发布时间】：2016-07-22 03:10:43
【问题描述】：
我正在使用FeedEk jQuery 插件，它使用 YQL API，尝试显示三个 RSS 提要。
大多数情况下一切正常，但每隔一段时间我会从三个提要中的一个提要中收到results: null，但通常是第二个和第三个要被调用，很少是第一个。我已经检查了提要本身，它们没有显示任何问题，我还在雅虎控制台上对其进行了测试，但没有显示任何问题。 这不是呼叫限制问题，因为我在测试时每天从我的 IP 中几乎没有达到 300 个呼叫。
我启用了诊断，我看到的唯一与result: null 提要不同的是它在info 部分Using encoding from response content-type header (UTF-8) as XML document does not specify encoding. 中有以下消息
这是我正在打的电话
SELECT channel.item FROM feednormalizer WHERE output="rss_2.0" AND url ="http://feeds.arstechnica.com/arstechnica/index" LIMIT 8
这是插件代码
/*
* FeedEk jQuery RSS/ATOM Feed Plugin v3.0 with YQL API (Engin KIZIL http://www.enginkizil.com)
* http://jquery-plugins.net/FeedEk/FeedEk.html https://github.com/enginkizil/FeedEk
* Author : Engin KIZIL http://www.enginkizil.com
*/
(function ($) {
$.fn.FeedEk = function (opt) {
var def = $.extend({
MaxCount: 5,
ShowDesc: true,
ShowPubDate: true,
DescCharacterLimit: 0,
TitleLinkTarget: "_blank",
DateFormat: "",
DateFormatLang:"en"
}, opt);
var id = $(this).attr("id"), i, s = "", dt;
$("#" + id).empty();
if (def.FeedUrl == undefined) return;
$("#" + id).append('<div style="width:100%;text-align:center;color:#424242;"><div class="loader"></div></div>');
var YQLstr = 'SELECT channel.item FROM feednormalizer WHERE output="rss_2.0" AND url ="' + def.FeedUrl + '" LIMIT ' + def.MaxCount;
$.ajax({
url: "https://query.yahooapis.com/v1/public/yql?q=" + encodeURIComponent(YQLstr) + "&format=json&diagnostics=true&callback=?",
dataType: "json",
success: function (data) {
$("#" + id).empty();
if (!(data.query.results.rss instanceof Array)) {
data.query.results.rss = [data.query.results.rss];
}
$.each(data.query.results.rss, function (e, itm) {
s += '<li><div class="itemTitle">' + itm.channel.item.title + '</div>';
if (def.ShowPubDate){
dt = new Date(itm.channel.item.pubDate);
s += '<div class="itemDate">';
if ($.trim(def.DateFormat).length > 0) {
try {
moment.lang(def.DateFormatLang);
s += moment(dt).format(def.DateFormat);
}
catch (e){s += dt.toLocaleDateString();}
}
else {
s += dt.toLocaleDateString();
}
s += '</div>';
}
if (def.ShowDesc) {
s += '<div class="itemContent">';
if (def.DescCharacterLimit > 0 && itm.channel.item.description.length > def.DescCharacterLimit) {
s += itm.channel.item.description.substring(0, def.DescCharacterLimit) + '...';
}
else {
s += itm.channel.item.description;
}
s += '</div>';
}
});
$("#" + id).append('<ul class="feedEkList">' + s + '</ul>');
}
});
};
})(jQuery);
最后是从 YQL 返回的失败结果的 XML
/**/
jQuery112204319277675822377_1459586267516({
"query": {
"count": 0,
"created": "2016-04-02T08:37:48Z",
"lang": "en-US",
"diagnostics": {
"publiclyCallable": "true",
"url": {
"execution-start-time": "1",
"execution-stop-time": "59",
"execution-time": "58",
"content": "http://feeds.arstechnica.com/arstechnica/index"
},
"info": "Using encoding from response content-type header (UTF-8) as XML document does not specify encoding.",
"user-time": "60",
"service-time": "58",
"build-version": "0.2.430"
},
"meta": {
"url": {
"id": "http://feeds.arstechnica.com/arstechnica/index",
"status": "200",
"headers": {
"header": [{
"name": "Content-Type",
"value": "text/xml; charset=UTF-8"
}, {
"name": "ETag",
"value": "m+oG6+UhrscSbLRLhGlL3lvlwNo"
}, {
"name": "Last-Modified",
"value": "Sat, 02 Apr 2016 07:32:51 GMT"
}, {
"name": "Content-Encoding",
"value": "gzip"
}, {
"name": "Expires",
"value": "Sat, 02 Apr 2016 07:40:36 GMT"
}, {
"name": "Cache-Control",
"value": "private, max-age=0"
}, {
"name": "X-Content-Type-Options",
"value": "nosniff"
}, {
"name": "X-XSS-Protection",
"value": "1; mode=block"
}, {
"name": "Server",
"value": "ATS"
}, {
"name": "Date",
"value": "Sat, 02 Apr 2016 08:37:48 GMT"
}, {
"name": "Age",
"value": "0"
}, {
"name": "Connection",
"value": "close"
}, {
"name": "Via",
"value": "http/1.1 ec2.ycs.bf1.yahoo.net (ApacheTrafficServer [cSsNfU])"
}
]
}
}
},
"results": null
}
});
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