以编程方式创建iTunes Podcast RSS Feed

Question

我正在尝试创建一个自动创建iTunes Podcast RSS feed的程序。我遇到的问题是我不知道如何创建所需的XML元素。我试图以两种不同的方式在这里创建两个标签。首先，我将"itunes:"用作字幕，但它不起作用，它引发了一个异常，即我无法在名称中使用冒号。第二个（图像）输出此

<image xmlns="http://www.itunes.com/dtds/podcast-1.0.dtd" href="http://someurkl.com/myimgp.png"/>

有什么方法可以使它与ASP.net一起使用？或者，您可以为我指出正确的文档说明方向还是可以向我展示如何为iTunes播客创建提要的教程。

我的代码：

XNamespace itunesNS = "http://www.itunes.com/dtds/podcast-1.0.dtd";

SyndicationFeed feed = new SyndicationFeed(title, description, new Uri(link));

feed.ElementExtensions.Add(new XElement("itunes:" + "subtitle", subTitle).CreateReader());
feed.ElementExtensions.Add(new XElement(itunesNS + "image", new XAttribute("href", imageUrl)).CreateReader());

iTunes要求的格式：

<itunes:subtitle>My Subtitle Here</itunes:subtitle>

Apple的示例Feed：

<?xml version="1.0" encoding="UTF-8"?>

<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
<channel>
    <title>All About Everything</title>
    <link>http://www.example.com/podcasts/everything/index.html</link>
    <language>en-us</language>
    <copyright>&#x2117; &amp; &#xA9; 2005 John Doe &amp; Family</copyright>
    <itunes:subtitle>A show about everything</itunes:subtitle>
    <itunes:author>John Doe</itunes:author>
    <itunes:summary>All About Everything is a show about everything. Each week we dive into any subject known to man and talk about it as much as we can. Look for our Podcast in the iTunes Store</itunes:summary>
    <description>All About Everything is a show about everything. Each week we dive into any subject known to man and talk about it as much as we can. Look for our Podcast in the iTunes Store</description>
    <itunes:owner>
        <itunes:name>John Doe</itunes:name>
        <itunes:email>[email protected]</itunes:email>
    </itunes:owner>
    <itunes:image href="http://example.com/podcasts/everything/AllAboutEverything.jpg" />
    <itunes:category text="Technology">
    <itunes:category text="Gadgets"/>
    </itunes:category>
    <itunes:category text="TV &amp; Film"/>
    <item>
        <title>Shake Shake Shake Your Spices</title>
        <itunes:author>John Doe</itunes:author>
        <itunes:subtitle>A short primer on table spices</itunes:subtitle>
        <itunes:summary>This week we talk about salt and pepper shakers, comparing and contrasting pour rates, construction materials, and overall aesthetics. Come and join the party!</itunes:summary>
        <itunes:image href="http://example.com/podcasts/everything/AllAboutEverything/Episode1.jpg" />
        <enclosure url="http://example.com/podcasts/everything/AllAboutEverythingEpisode3.m4a" length="8727310" type="audio/x-m4a" />
        <guid>http://example.com/podcasts/archive/aae20050615.m4a</guid>
        <pubDate>Wed, 15 Jun 2005 19:00:00 GMT</pubDate>
        <itunes:duration>7:04</itunes:duration>
    </item>

    <item>
        <title>Socket Wrench Shootout</title>
        <itunes:author>Jane Doe</itunes:author>
        <itunes:subtitle>Comparing socket wrenches is fun!</itunes:subtitle>
        <itunes:summary>This week we talk about metric vs. old english socket wrenches. Which one is better? Do you really need both? Get all of your answers here.</itunes:summary>
        <itunes:image href="http://example.com/podcasts/everything/AllAboutEverything/Episode2.jpg" />
        <enclosure url="http://example.com/podcasts/everything/AllAboutEverythingEpisode2.mp3" length="5650889" type="audio/mpeg" />
        <guid>http://example.com/podcasts/archive/aae20050608.mp3</guid>
        <pubDate>Wed, 8 Jun 2005 19:00:00 GMT</pubDate>
        <itunes:duration>4:34</itunes:duration>
    </item>

    <item>
        <title>Red, Whine, &amp; Blue</title>
        <itunes:author>Various</itunes:author>
        <itunes:subtitle>Red + Blue != Purple</itunes:subtitle>
        <itunes:summary>This week we talk about surviving in a Red state if you are a Blue person. Or vice versa.</itunes:summary>
        <itunes:image href="http://example.com/podcasts/everything/AllAboutEverything/Episode3.jpg" />
        <enclosure url="http://example.com/podcasts/everything/AllAboutEverythingEpisode1.mp3" length="4989537" type="audio/mpeg" />
        <guid>http://example.com/podcasts/archive/aae20050601.mp3</guid>
        <pubDate>Wed, 1 Jun 2005 19:00:00 GMT</pubDate>
        <itunes:duration>3:59</itunes:duration>
    </item>
</channel>
</rss>

Answer 1

TL; DR

看起来您需要在生成rss的代码区域中为itunes:标记定义自定义名称空间。>>

---

这里有一些info originally written by Lukasz Karolak，可能会对您有所帮助。

假设我们想要一个RSS feed，实际上它可以用作播客，例如适用于iTunes。 Apple的软件使用其自定义的RSS标记（带有itunes前缀）的某些信息，例如：

<itunes:author>Anonymous One</itunes:author>
没有此前缀，这非常简单。我们的SyndicationItem类为我们提供了扩展标准项元素的功能：

SyndicationItem item = new SyndicationItem();
item.ElementExtensions.Add(customTagString.Empty, "My test");
第二个属性是在下一步中起作用的名称空间。为了如前所述添加标签前缀，首先要将名称空间添加到供稿实例：

SyndicationFeed feed = new SyndicationFeed();
XmlQualifiedName n=new XmlQualifiedName("itunes","http://www.w3.org/2000/xmlns/");
String itunesNs = "http://www.itunes.com/dtds/podcast-1.0.dtd";
feed.AttributeExtensions.Add(n, itunesNs);
现在我们已经将新的名称空间添加到了提要中，我们可以开始在该名称空间中添加自定义项目元素。

SyndicationItem item = new SyndicationItem();
item.ElementExtensions.Add(new SyndicationElementExtension("author",
     itunesNs, "Famous author"));
这应该使用带有自定义前缀的自定义标签解决该问题。