有人能告诉我如何从json提要中获取媒体的属性吗？
有人能告诉我如何从json提要中获取媒体的属性吗？
提问于 2010-04-03 04:34:58
我制作了一个yahoo管道，它以json格式拉出原子；但是，除了元素的属性之外，我还可以获取并显示html页面中的所有元素。
有人能告诉我如何从json提要中获取媒体的属性吗？
我正在用javascript粘贴html页面的代码。如果您保存html页面，然后在浏览器中查看它，您将看到所有必需的元素都在html页面上得到输出，除了media:拇指，因为当提要格式化为json时，我无法显示media:拇指的属性。
我还粘贴了json提要的某些部分，这样您就可以知道我在说什么了。
请告诉我如何使用普通的javascript，但没有服务器端代码或javascript库，从媒体检索属性: json提要的拇指元素。
谢谢。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function getFeed(feed){
var newScript = document.createElement('script');
newScript.type = 'text/javascript';
newScript.src = 'http://pipes.yahoo.com/pipes/pipe.run?_id=40616620df99780bceb3fe923cecd216&_render=json&_callback=piper';
document.getElementsByTagName("head")[0].appendChild(newScript);
}
function piper(feed){
var tmp='';
for (var i=0; i<feed.value.items.length; i++) {
tmp+='<a href="'+feed.value.items[i].link+'">';
tmp+=feed.value.items[i].title+'</a><br>';
tmp+=feed.value.items[i].author.name+'<br>';
tmp+=feed.value.items[i].published+'<br><br>';
if (feed.value.items[i].description) {
tmp+=feed.value.items[i].description+'<br>';
}
tmp+='<hr>';
}
document.getElementById('rssLayer').innerHTML=tmp;
}
</script>
</head>
<body onload="getFeed('http://del.icio.us/rss/popular/javascript')">
<div id='rssLayer'>bchnbc</div>
</body>
</html>由雅虎管道生成的json提要的某些部分：
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
</head>
piper({"count":2,"value":{"title":"myPipe","description":"Pipes Output","link":"http:\/\/pipes.yahoo.com\/pipes\/pipe.info?_id=f7f4175d493cf1171aecbd3268fea5ee","pubDate":"Fri, 02 Apr 2010 17:59:22 -0700","generator":"http:\/\/pipes.yahoo.com\/pipes\/","callback":"piper",
"items":
[{
"rights":"Attribution - Noncommercial - No Derivative Works",
"link":"http:\/\/vodo.net\/mixtape1",
"y:id":{"value":null,"permalink":"true"},
"content":{"content":"We're proud to be releasing this first VODO MIXTAPE. Actual tape might be a thing of the past, but before P2P, mixtapes were the most popular way of sharing popular culture the world had known -- and once called the 'most widely practiced American art form'. We want to resuscitate the spirit of the mixtape for this VODO MIXTAPE series: compilations of our favourite shorts, the weird, the wild and the wonky, all brought together in a temporary and uncomfortable company.","type":"text"},
"author":
{"name":"Various"},
"description":"We're proud to be releasing this first VODO MIXTAPE. Actual tape might be a thing of the past, but before P2P, mixtapes were the
most popular way of sharing popular culture the world had known -- and once called the 'most widely practiced American art form'. We want to resuscitate the spirit
of the mixtape for this VODO MIXTAPE series: compilations of our favourite shorts, the weird, the wild and the wonky, all brought together in a temporary and
uncomfortable company.",
"media:thumbnail":
{
"url":"http:\/\/vodo.net\/\/thumbnails\/Mixtape1.jpg"
},
"published":"2010-03-08-09:20:20 PM",
"format":
{
"audio_bitrate":null,
"width":"608",
"xmlns":"http:\/\/xmlns.transmission.cc\/FileFormat",
"channels":"2",
"samplerate":"44100.0",
"duration":"3092.36",
"height":"352",
"size":"733925376.0",
"framerate":"25.0",
"audio_codec":"mp3",
"video_bitrate":"1898.0",
"video_codec":"XVID",
"pixel_aspect_ratio":"16:9"
},
"y:title":"Mixtape #1: VODO's favourite short films",
"title":"Mixtape #1: VODO's favourite short films",
"id":null,
"pubDate":"2010-03-08-09:20:20 PM",
"y:published":{"hour":"3","timezone":"UTC","second":"0","month":"4","minute":"10","utime":"1270264200","day":"3","day_of_week":"6","year":"2010"
}},
{"rights":"Attribution - Noncommercial - No Derivative Works","link":"http:\/\/vodo.net\/gilbert","y:id":{"value":"cd6584e06ea4ce7fcd34172f4bbd919e295f8680","permalink":"true"},"content":{"content":"A documentary short about Gilbert, the Beacon Hill \"town crier.\" For the last 9 years, since losing his job and becoming homeless, Gilbert has delivered the weather, sports, and breaking headlines from his spot on the Boston Common. Music (used with permission) in this piece is called \"Blue Bicycle\" by Dusseldorf-based pianist \/ composer Volker Bertelmann also known as Hauschka. Artistic Statement: This is the first in a series of profiles of people who I think are interesting, and who I see on almost a daily basis. I don't want to limit the series to people who live \"on the fringe,\" but it would be appropriate to say that most of the people I interview are eclectic, eccentric, and just a little bit unique. The art is in the viewing - but I hope to turn my lens on individuals that don't always color in the lines, whether they can help it or not.","type":"text"},"author":{"name":"Nathaniel Hansen"},"description":"A documentary short about Gilbert, the Beacon Hill \"town crier.\" For the last 9 years, since losing his job and becoming homeless, Gilbert has delivered the weather, sports, and breaking headlines from his spot on the Boston Common. Music (used with permission) in this piece is called \"Blue Bicycle\" by Dusseldorf-based pianist \/ composer Volker Bertelmann also known as Hauschka. Artistic Statement: This is the first in a series of profiles of people who I think are interesting, and who I see on almost a daily basis. I don't want to limit the series to people who live \"on the fringe,\" but it would be appropriate to say that most of the people I interview are eclectic, eccentric, and just a little bit unique. The art is in the viewing - but I hope to turn my lens on individuals that don't always color in the lines, whether they can help it or not.","media:thumbnail":{"url":"http:\/\/vodo.net\/\/thumbnails\/gilbert.jpeg"},"published":"2010-03-03-10:37:05 AM","format":{"audio_bitrate":null,"width":"624","xmlns":"http:\/\/xmlns.transmission.cc\/FileFormat","channels":"2","samplerate":null,"duration":"373.673","height":"352","size":"123321266.0","framerate":null,"audio_codec":"mp3","video_bitrate":null,"video_codec":"XVID","pixel_aspect_ratio":"16:9"},"y:title":"Gilbert","title":"Gilbert","id":"cd6584e06ea4ce7fcd34172f4bbd919e295f8680","pubDate":"2010-03-03-10:37:05 AM","y:published":{"hour":"3","timezone":"UTC","second":"0","month":"4","minute":"10","utime":"1270264200","day":"3","day_of_week":"6","year":"2010"
}}
]
}})回答 2
Stack Overflow用户
发布于 2010-04-04 22:23:50
如果创建了JSON，就不能编辑提要以显示可以使用javascript操作的元素吗？
Stack Overflow用户
发布于 2010-04-04 23:31:45
遍历XML文档要比遍历JSON对象查找特定节点类型容易得多。在XML中，它将与xmlDom.getElementsByTagName一样简单(“media:拇指”)。
然而，在Javascript中，我选择了以下内容：
function recurseAndFind(obj, key) {
var x,
temp,
current,
ret = [];
for (x in obj) {
if (obj.hasOwnProperty(x)) {
current = obj[x];
if (x == key) {
ret.push(current);
} else if (typeof current === "object") {
temp = recurseAndFind(current, key);
if (temp.length) {
ret = ret.concat(temp);
};
} else if (typeof current === "array") {
for (var i=0;i<current.length;i++) {
temp = recurseAndFind(current[i], key);
if (temp.length) {
ret = ret.concat(temp);
};
};
};
};
};
return ret;
};其用途如下：
var allOccurancesOfMediaThumb = recurseAndFind(items, 'media:thumb');allOccurancesOfMediaThumb将是出现的数组(如果没有发现，则为空数组)。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/2570231
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