public async Task <string> GetOpmlDataAsync(OpmlDoc opmlDoc)
{
var sb = new StringBuilder();
var writerSettings = new XmlWriterSettings {
Encoding = Encoding.UTF8, Async = true
};
await using (var writer = XmlWriter.Create(sb, writerSettings))
{
// open OPML
writer.WriteStartElement("opml");
await writer.WriteAttributeStringAsync("xmlns", "xsd", null, "http://www.w3.org/2001/XMLSchema");
await writer.WriteAttributeStringAsync("xmlns", "xsi", null, "http://www.w3.org/2001/XMLSchema-instance");
writer.WriteAttributeString("version", "1.0");
// open HEAD
writer.WriteStartElement("head");
writer.WriteStartElement("title");
writer.WriteValue(opmlDoc.SiteTitle);
await writer.WriteEndElementAsync();
await writer.WriteEndElementAsync();
// open BODY
writer.WriteStartElement("body");
// allrss
writer.WriteStartElement("outline");
writer.WriteAttributeString("title", "All Posts");
writer.WriteAttributeString("text", "All Posts");
writer.WriteAttributeString("type", "rss");
writer.WriteAttributeString("xmlUrl", opmlDoc.XmlUrl);
writer.WriteAttributeString("htmlUrl", opmlDoc.HtmlUrl);
await writer.WriteEndElementAsync();
// categories
foreach (var cat in opmlDoc.ContentInfo)
{
// open OUTLINE
writer.WriteStartElement("outline");
writer.WriteAttributeString("title", cat.Key);
writer.WriteAttributeString("text", cat.Value);
writer.WriteAttributeString("type", "rss");
writer.WriteAttributeString("xmlUrl", opmlDoc.XmlUrlTemplate.Replace("[catTitle]", cat.Value).ToLower());
writer.WriteAttributeString("htmlUrl", opmlDoc.HtmlUrlTemplate.Replace("[catTitle]", cat.Value).ToLower());
// close OUTLINE
await writer.WriteEndElementAsync();
}
// close BODY
await writer.WriteEndElementAsync();
// close OPML
await writer.WriteEndElementAsync();
}
var xml = sb.ToString();
return(xml);
}
public async Task WriteOpmlFileAsync(string opmlFilePath, OpmlDoc opmlDoc)
{
await using var fs = new FileStream(opmlFilePath, FileMode.Create, FileAccess.Write, FileShare.None, 4096, true);
var writerSettings = new XmlWriterSettings {
Encoding = Encoding.UTF8, Indent = true, Async = true
};
using (var writer = XmlWriter.Create(fs, writerSettings))
{
// open OPML
writer.WriteStartElement("opml");
await writer.WriteAttributeStringAsync("xmlns", "xsd", null, "http://www.w3.org/2001/XMLSchema");
await writer.WriteAttributeStringAsync("xmlns", "xsi", null, "http://www.w3.org/2001/XMLSchema-instance");
writer.WriteAttributeString("version", "1.0");
// open HEAD
writer.WriteStartElement("head");
writer.WriteStartElement("title");
writer.WriteValue(opmlDoc.SiteTitle);
await writer.WriteEndElementAsync();
await writer.WriteEndElementAsync();
// open BODY
writer.WriteStartElement("body");
// allrss
writer.WriteStartElement("outline");
writer.WriteAttributeString("title", "All Posts");
writer.WriteAttributeString("text", "All Posts");
writer.WriteAttributeString("type", "rss");
writer.WriteAttributeString("xmlUrl", opmlDoc.XmlUrl);
writer.WriteAttributeString("htmlUrl", opmlDoc.HtmlUrl);
await writer.WriteEndElementAsync();
// categories
foreach (var cat in opmlDoc.CategoryInfo)
{
// open OUTLINE
writer.WriteStartElement("outline");
writer.WriteAttributeString("title", cat.Key);
writer.WriteAttributeString("text", cat.Value);
writer.WriteAttributeString("type", "rss");
writer.WriteAttributeString("xmlUrl", opmlDoc.CategoryXmlUrlTemplate.Replace("[catTitle]", cat.Value).ToLower());
writer.WriteAttributeString("htmlUrl", opmlDoc.CategoryHtmlUrlTemplate.Replace("[catTitle]", cat.Value).ToLower());
// close OUTLINE
await writer.WriteEndElementAsync();
}
// close BODY
await writer.WriteEndElementAsync();
// close OPML
await writer.WriteEndElementAsync();
}
await fs.FlushAsync();
}