private ISyndicationContent CreateFromSourceLink(ISyndicationLink link)
{
//
// source
var result = new SyndicationContent(AtomElementNames.Source);
//
// title
if (!string.IsNullOrEmpty(link.Title))
{
result.AddField(new SyndicationContent(AtomElementNames.Title, link.Title));
}
//
// link
result.AddField(CreateFromLink(new SyndicationLink(link.Uri)
{
MediaType = link.MediaType,
Length = link.Length
}));
//
// updated
if (link.LastUpdated != default(DateTimeOffset))
{
result.AddField(new SyndicationContent(AtomElementNames.Updated, FormatValue(link.LastUpdated)));
}
return(result);
}
private ISyndicationContent GetOwner()
{
var ownerContent = new SyndicationContent("owner", _itunesNs, null);
ownerContent.AddField(new SyndicationContent("name", _itunesNs, "Michael Friis"));
ownerContent.AddField(new SyndicationContent("email", _itunesNs, "*****@*****.**"));
return(ownerContent);
}
private async Task writeSyndicationItemsAsync(RssFormatter formatter, RssFeedWriter rssFeedWriter)
{
foreach (var item in getSyndicationItems())
{
var content = new SyndicationContent(formatter.CreateContent(item));
content.AddField(new SyndicationContent("atom:updated", Atom10Namespace, item.LastUpdated.ToString("r")));
await rssFeedWriter.Write(content);
}
}
public virtual ISyndicationContent CreateContent(ISyndicationPerson person)
{
if (person == null)
{
throw new ArgumentNullException(nameof(person));
}
if (string.IsNullOrEmpty(person.Name))
{
throw new ArgumentNullException("Name");
}
string contributorType = person.RelationshipType ?? AtomContributorTypes.Author;
if (contributorType != AtomContributorTypes.Author &&
contributorType != AtomContributorTypes.Contributor)
{
throw new ArgumentException("RelationshipType");
}
var result = new SyndicationContent(contributorType);
//
// name
result.AddField(new SyndicationContent(AtomElementNames.Name, person.Name));
//
// email
if (!string.IsNullOrEmpty(person.Email))
{
result.AddField(new SyndicationContent(AtomElementNames.Email, person.Email));
}
//
// uri
if (person.Uri != null)
{
result.AddField(new SyndicationContent(AtomElementNames.Uri, FormatValue(person.Uri)));
}
return(result);
}
private static ISyndicationContent ReadSyndicationContent(XmlReader reader)
{
var content = new SyndicationContent(reader.LocalName, reader.NamespaceURI, null);
//
// Attributes
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
ISyndicationAttribute attr = reader.ReadSyndicationAttribute();
if (attr != null)
{
content.AddAttribute(attr);
}
}
reader.MoveToContent();
}
//
// Content
if (!reader.IsEmptyElement)
{
reader.ReadStartElement();
//
// Value
if (reader.HasValue)
{
content.Value = reader.ReadContentAsString();
}
//
// Children
else
{
while (reader.IsStartElement())
{
content.AddField(ReadSyndicationContent(reader));
}
}
reader.ReadEndElement(); // end
}
else
{
reader.Skip();
}
return(content);
}
public virtual ISyndicationContent CreateContent(ISyndicationImage image)
{
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
// Required URL - Title - Link
if (string.IsNullOrEmpty(image.Title))
{
throw new ArgumentNullException("Image requires a title");
}
if (image.Link == null)
{
throw new ArgumentNullException("Image requires a link");
}
if (image.Url == null)
{
throw new ArgumentNullException("Image requires an url");
}
var content = new SyndicationContent(RssElementNames.Image);
// Write required contents of image
content.AddField(new SyndicationContent(RssElementNames.Url, FormatValue(image.Url)));
content.AddField(new SyndicationContent(RssElementNames.Title, image.Title));
content.AddField(CreateContent(image.Link));
// Write optional elements
if (!string.IsNullOrEmpty(image.Description))
{
content.AddField(new SyndicationContent(RssElementNames.Description, image.Description));
}
return(content);
}
public virtual Task WriteSkipDays(IEnumerable <DayOfWeek> days)
{
if (days == null)
{
throw new ArgumentNullException(nameof(days));
}
var skipDays = new SyndicationContent(RssElementNames.SkipDays);
foreach (var d in days)
{
skipDays.AddField(new SyndicationContent("day", Formatter.FormatValue(d)));
}
return(Write(skipDays));
}
public static async Task WriteCustomItem()
{
const string ExampleNs = "http://contoso.com/syndication/feed/examples";
var sw = new StringWriterWithEncoding(Encoding.UTF8);
using (XmlWriter xmlWriter = XmlWriter.Create(sw, new XmlWriterSettings()
{
Async = true, Indent = true
}))
{
var attributes = new List <SyndicationAttribute>()
{
new SyndicationAttribute("xmlns:example", ExampleNs)
};
var formatter = new RssFormatter(attributes, xmlWriter.Settings);
var writer = new RssFeedWriter(xmlWriter, attributes, formatter);
// Create item
var item = new SyndicationItem()
{
Title = "Rss Writer Available",
Description = "The new RSS Writer is now available as a NuGet package!",
Id = "https://www.nuget.org/packages/Microsoft.SyndicationFeed",
Published = DateTimeOffset.UtcNow
};
item.AddCategory(new SyndicationCategory("Technology"));
item.AddContributor(new SyndicationPerson("test", "*****@*****.**"));
//
// Format the item as SyndicationContent
var content = new SyndicationContent(formatter.CreateContent(item));
// Add custom fields/attributes
content.AddField(new SyndicationContent("customElement", ExampleNs, "Custom Value"));
// Write
await writer.Write(content);
// Done
xmlWriter.Flush();
}
Console.WriteLine(sw.ToString());
}
public async Task FormatterWriterWithNamespaces()
{
const string ExampleNs = "http://contoso.com/syndication/feed/examples";
var sw = new StringWriter();
using (var xmlWriter = XmlWriter.Create(sw))
{
var attributes = new SyndicationAttribute[] { new SyndicationAttribute("xmlns:example", ExampleNs) };
var formatter = new RssFormatter(attributes, xmlWriter.Settings);
var writer = new RssFeedWriter(xmlWriter, attributes, formatter);
// Create item
var item = new SyndicationItem()
{
Title = "Rss Writer Available",
Description = "The new RSS Writer is now open source!",
Id = "https://github.com/dotnet/wcf/tree/lab/lab/src/Microsoft.SyndicationFeed/src",
Published = DateTimeOffset.UtcNow
};
item.AddCategory(new SyndicationCategory("Technology"));
item.AddContributor(new SyndicationPerson(null, "*****@*****.**"));
//
// Format the item as SyndicationContent
var content = new SyndicationContent(formatter.CreateContent(item));
// Add custom fields/attributes
content.AddField(new SyndicationContent("customElement", ExampleNs, "Custom Value"));
// Write
await writer.Write(content);
await writer.Write(content);
await writer.Flush();
}
string res = sw.ToString();
}
public virtual Task WriteSkipHours(IEnumerable <byte> hours)
{
if (hours == null)
{
throw new ArgumentNullException(nameof(hours));
}
var skipHours = new SyndicationContent(RssElementNames.SkipHours);
foreach (var h in hours)
{
if (h < 0 || h > 23)
{
throw new ArgumentOutOfRangeException("Hour value must be between 0 and 23");
}
skipHours.AddField(new SyndicationContent("hour", Formatter.FormatValue(h)));
}
return(Write(skipHours));
}
public virtual ISyndicationContent CreateContent(ISyndicationItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
// Spec requires to have at least one title or description
if (string.IsNullOrEmpty(item.Title) && string.IsNullOrEmpty(item.Description))
{
throw new ArgumentNullException("RSS Item requires a title or a description");
}
// Write <item> tag
var content = new SyndicationContent(RssElementNames.Item);
//
// Title
if (!string.IsNullOrEmpty(item.Title))
{
content.AddField(new SyndicationContent(RssElementNames.Title, item.Title));
}
//
// Links
ISyndicationLink guidLink = null;
if (item.Links != null)
{
foreach (var link in item.Links)
{
if (link.RelationshipType == RssElementNames.Guid)
{
guidLink = link;
}
content.AddField(CreateContent(link));
}
}
//
// Description
if (!string.IsNullOrEmpty(item.Description))
{
content.AddField(new SyndicationContent(RssElementNames.Description, item.Description));
}
//
// Authors (persons)
if (item.Contributors != null)
{
foreach (var person in item.Contributors)
{
content.AddField(CreateContent(person));
}
}
//
// Cathegory
if (item.Categories != null)
{
foreach (var category in item.Categories)
{
content.AddField(CreateContent(category));
}
}
//
// Guid (id)
if (guidLink == null && !string.IsNullOrEmpty(item.Id))
{
var guid = new SyndicationContent(RssElementNames.Guid, item.Id);
guid.AddAttribute(new SyndicationAttribute(RssConstants.IsPermaLink, "false"));
content.AddField(guid);
}
//
// PubDate
if (item.Published != DateTimeOffset.MinValue)
{
content.AddField(new SyndicationContent(RssElementNames.PubDate, FormatValue(item.Published)));
}
return(content);
}
public virtual ISyndicationContent CreateContent(ISyndicationItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (string.IsNullOrEmpty(item.Id))
{
throw new ArgumentNullException("Id");
}
if (string.IsNullOrEmpty(item.Title))
{
throw new ArgumentNullException("Title");
}
if (item.LastUpdated == default(DateTimeOffset))
{
throw new ArgumentException("LastUpdated");
}
var result = new SyndicationContent(AtomElementNames.Entry);
//
// id
result.AddField(new SyndicationContent(AtomElementNames.Id, item.Id));
//
// title
result.AddField(new SyndicationContent(AtomElementNames.Title, item.Title));
//
// updated
result.AddField(new SyndicationContent(AtomElementNames.Updated, FormatValue(item.LastUpdated)));
//
// published
if (item.Published != default(DateTimeOffset))
{
result.AddField(new SyndicationContent(AtomElementNames.Published, FormatValue(item.Published)));
}
//
// link
bool hasContentLink = false;
bool hasAlternateLink = false;
if (item.Links != null)
{
foreach (var link in item.Links)
{
if (link.RelationshipType == AtomLinkTypes.Content)
{
if (hasContentLink)
{
throw new ArgumentNullException("Multiple content links are not allowed");
}
hasContentLink = true;
}
else if (link.RelationshipType == null || link.RelationshipType == AtomLinkTypes.Alternate)
{
hasAlternateLink = true;
}
result.AddField(CreateContent(link));
}
}
//
// author/contributor
bool hasAuthor = false;
if (item.Contributors != null)
{
foreach (var c in item.Contributors)
{
if (c.RelationshipType == null || c.RelationshipType == AtomContributorTypes.Author)
{
hasAuthor = true;
}
result.AddField(CreateContent(c));
}
}
if (!hasAuthor)
{
throw new ArgumentException("Author is required");
}
//
// category
if (item.Categories != null)
{
foreach (var category in item.Categories)
{
result.AddField(CreateContent(category));
}
}
IAtomEntry entry = item as IAtomEntry;
//
// content
if (!string.IsNullOrEmpty(item.Description))
{
if (hasContentLink)
{
throw new ArgumentException("Description and content link are not allowed simultaneously");
}
var content = new SyndicationContent(AtomElementNames.Content, item.Description);
//
// type
if (entry != null &&
!(string.IsNullOrEmpty(entry.ContentType) || entry.ContentType.Equals(AtomConstants.PlainTextContentType, StringComparison.OrdinalIgnoreCase)))
{
content.AddAttribute(new SyndicationAttribute(AtomConstants.Type, entry.ContentType));
}
result.AddField(content);
}
else
{
if (!(hasContentLink || hasAlternateLink))
{
throw new ArgumentException("Description or alternate link is required");
}
}
if (entry != null)
{
//
// summary
if (!string.IsNullOrEmpty(entry.Summary))
{
result.AddField(new SyndicationContent(AtomElementNames.Summary, entry.Summary));
}
//
// rights
if (!string.IsNullOrEmpty(entry.Rights))
{
result.AddField(new SyndicationContent(AtomElementNames.Rights, entry.Rights));
}
}
return(result);
}
private static ISyndicationContent ReadSyndicationContent(XmlReader reader)
{
string type = null;
var content = new SyndicationContent(reader.LocalName, reader.NamespaceURI, null);
//
// Attributes
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
ISyndicationAttribute attr = reader.ReadSyndicationAttribute();
if (attr != null)
{
if (type == null && attr.IsAtom(AtomConstants.Type))
{
type = attr.Value;
}
content.AddAttribute(attr);
}
}
reader.MoveToContent();
}
//
// Content
if (!reader.IsEmptyElement)
{
//
// Xml (applies to <content>)
if (XmlUtils.IsXmlMediaType(type) && content.IsAtom(AtomElementNames.Content))
{
if (reader.NodeType != XmlNodeType.Element)
{
throw new FormatException($"Invalid Xml element");
}
content.Value = reader.ReadInnerXml();
}
else
{
reader.ReadStartElement();
//
// Xhtml
if (XmlUtils.IsXhtmlMediaType(type) && content.IsAtom())
{
if (reader.NamespaceURI != AtomConstants.XhtmlNamespace)
{
throw new FormatException($"Invalid Xhtml namespace");
}
content.Value = reader.ReadInnerXml();
}
//
// Text/Html
else if (reader.HasValue)
{
content.Value = reader.ReadContentAsString();
}
//
// Children
else
{
while (reader.IsStartElement())
{
content.AddField(ReadSyndicationContent(reader));
}
}
reader.ReadEndElement(); // end
}
}
else
{
reader.Skip();
}
return(content);
}
public async Task Get(int id)
{
try
{
var series = await new Bonanza(_httpClient).GetSeries(id);
Response.ContentType = "application/rss+xml";
using (var xmlWriter = XmlWriter.Create(Response.Body, new XmlWriterSettings()
{
Async = true,
Encoding = Encoding.UTF8
}))
{
var attributes = new List <SyndicationAttribute>()
{
new SyndicationAttribute("xmlns:itunes", _itunesNs),
};
var formatter = new RssFormatter(attributes, xmlWriter.Settings);
var feedWriter = new RssFeedWriter(xmlWriter, attributes, formatter);
await WriteFeedPreamble(feedWriter);
await feedWriter.WriteTitle(series.Title);
await feedWriter.Write(new SyndicationContent("subtitle", _itunesNs, series.SubTitle));
await feedWriter.Write(new SyndicationLink(new Uri(series.Url)));
await feedWriter.Write(new SyndicationContent("author", _itunesNs, series.Author));
await feedWriter.Write(new SyndicationContent("summary", _itunesNs, series.Description));
foreach (var x in series.Episodes.OrderBy(x => x.Published)
.Select((value, i) => new { i, value }))
{
var episode = x.value;
var item = new SyndicationItem
{
Title = episode.Title,
Description = episode.Description,
Published = episode.Published,
Id = $"{episode.WebUri}",
};
item.AddLink(new SyndicationLink(episode.MediaUri, RssLinkTypes.Enclosure)
{
MediaType = episode.MediaType,
Length = episode.FileLength,
});
item.AddLink(new SyndicationLink(episode.WebUri));
var content = new SyndicationContent(formatter.CreateContent(item));
content.AddField(new SyndicationContent("summary", _itunesNs, episode.Description));
content.AddField(new SyndicationContent("author", _itunesNs, string.Join(", ", episode.Authors)));
content.AddField(new SyndicationContent("duration", _itunesNs,
episode.Duration.ToString(@"hh\:mm\:ss")));
content.AddField(new SyndicationContent("explicit", _itunesNs, "no"));
content.AddField(new SyndicationContent("episode", _itunesNs, $"{x.i + 1}"));
content.AddField(new SyndicationContent("language", _itunesNs, $"{_daCulture}"));
await feedWriter.Write(content);
}
}
}
catch (SeriesNotFoundException)
{
Response.StatusCode = 404;
return;
}
}
public async static Task <string> GetFeedAsync(IEnumerable <Post> posts)
{
var sw = new StringWriterWithEncoding(Encoding.UTF8);
const string ExampleNs = "https://feed.lucasteles.net";
using (var xmlWriter = XmlWriter.Create(sw, new XmlWriterSettings {
Async = true, Indent = true
}))
{
var attributes = new List <SyndicationAttribute>
{
new SyndicationAttribute("xmlns:feed", ExampleNs)
};
var formatter = new RssFormatter(attributes, xmlWriter.Settings);
var writer = new RssFeedWriter(xmlWriter, null, new RssFormatter()
{
UseCDATA = true
});
//
// Add Title
await writer.WriteTitle("Lucas Teles - Blog");
//
// Add Description
await writer.WriteDescription("Tecnologia e inovação");
//
// Add Link
await writer.Write(new SyndicationLink(new Uri("https://lucasteles.net")));
//
// Add managing editor
await writer.Write(new SyndicationPerson("lucasteles", "*****@*****.**", RssContributorTypes.ManagingEditor));
//
// Add publish date
await writer.WritePubDate(DateTimeOffset.UtcNow);
//
// Add Items
foreach (var post in posts)
{
var item = new SyndicationItem
{
Id = $"https://lucasteles.net/p={post.Id}",
Title = post.Title,
Description = post.Description,
Published = post.Date,
};
item.AddLink(new SyndicationLink(new Uri($"https://lucasteles.net/{post.Path}")));
item.AddCategory(new SyndicationCategory("Technology"));
item.AddContributor(new SyndicationPerson("Lucas Teles", "*****@*****.**"));
// Format the item as SyndicationContent
var content = new SyndicationContent(formatter.CreateContent(item));
content.AddField(new SyndicationContent("content:encoded", string.Empty, post.Content));
// Write
await writer.Write(content);
}
//
// Done
xmlWriter.Flush();
}
return(sw.ToString());
}
public static async Task WriteFeed()
{
var sw = new StringWriterWithEncoding(Encoding.UTF8);
using (XmlWriter xmlWriter = XmlWriter.Create(sw, new XmlWriterSettings()
{
Async = true, Indent = true
}))
{
var writer = new RssFeedWriter(xmlWriter);
//
// Add Title
await writer.WriteTitle("Example of RssFeedWriter");
//
// Add Description
await writer.WriteDescription("Hello World, RSS 2.0!");
//
// Add Link
await writer.Write(new SyndicationLink(new Uri("https://github.com/dotnet/SyndicationFeedReaderWriter")));
//
// Add managing editor
await writer.Write(new SyndicationPerson("managingeditor", "*****@*****.**", RssContributorTypes.ManagingEditor));
//
// Add publish date
await writer.WritePubDate(DateTimeOffset.UtcNow);
//
// Add custom element
var customElement = new SyndicationContent("customElement");
customElement.AddAttribute(new SyndicationAttribute("attr1", "true"));
customElement.AddField(new SyndicationContent("Company", "Contoso"));
await writer.Write(customElement);
//
// Add Items
for (int i = 0; i < 5; ++i)
{
var item = new SyndicationItem()
{
Id = "https://www.nuget.org/packages/Microsoft.SyndicationFeed.ReaderWriter",
Title = $"Item #{i + 1}",
Description = "The new Microsoft.SyndicationFeed.ReaderWriter is now available as a NuGet package!",
Published = DateTimeOffset.UtcNow
};
item.AddLink(new SyndicationLink(new Uri("https://github.com/dotnet/SyndicationFeedReaderWriter")));
item.AddCategory(new SyndicationCategory("Technology"));
item.AddContributor(new SyndicationPerson("user", "*****@*****.**"));
await writer.Write(item);
}
//
// Done
xmlWriter.Flush();
}
//
// Ouput the feed
Console.WriteLine(sw.ToString());
}
