public virtual ISyndicationContent CreateContent(ISyndicationCategory category)
{
if (category == null)
{
throw new ArgumentNullException(nameof(category));
}
if (string.IsNullOrEmpty(category.Name))
{
throw new ArgumentNullException("Name");
}
var result = new SyndicationContent(AtomElementNames.Category);
//
// term
result.AddAttribute(new SyndicationAttribute(AtomConstants.Term, category.Name));
//
// scheme
if (!string.IsNullOrEmpty(category.Scheme))
{
result.AddAttribute(new SyndicationAttribute(AtomConstants.Scheme, category.Scheme));
}
//
// label
if (!string.IsNullOrEmpty(category.Label))
{
result.AddAttribute(new SyndicationAttribute(AtomConstants.Label, category.Label));
}
return(result);
}
private async Task <ISyndicationCategory> ReadCategory(Rss20FeedReader reader)
{
ISyndicationCategory category = null;
category = await reader.ReadCategory();
return(category);
}
// Read an RssFeed
public static async Task CreateRssFeedReaderExample(string filePath)
{
// Create an XmlReader
// Example: ..\tests\TestFeeds\rss20-2items.xml
using (var xmlReader = XmlReader.Create(filePath, new XmlReaderSettings()
{
Async = true
}))
{
// Instantiate an Rss20FeedReader using the XmlReader.
// This will assign as default an Rss20FeedParser as the parser.
var feedReader = new RssFeedReader(xmlReader);
//
// Read the feed
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
}
}
}
private async Task <bool> retrievePosts(Feed feed)
{
using (var xmlReader = XmlReader.Create("https://azurecomcdn.azureedge.net/en-us/blog/feed/", new XmlReaderSettings()
{
Async = true
}))
{
// Instantiate an Rss20FeedReader using the XmlReader.
// This will assign as default an Rss20FeedParser as the parser.
var feedReader = new RssFeedReader(xmlReader);
//
// Read the feed
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
}
}
return(true);
}
private static async Task <List <object> > ParseExport(XmlReader xmlReader)
{
List <object> result = new List <object>();
{
var feedReader = new AtomFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
result.Add(category);
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
result.Add(image);
break;
// Read Item
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
result.Add(item);
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
result.Add(link);
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
result.Add(person);
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
result.Add(content);
break;
}
}
return(result);
}
}
public RssContent()
{
using (var xmlReader = XmlReader.Create("C:/Users/Developer/Desktop.brisbane-city-council.rss", new XmlReaderSettings()
{
Async = true
}))
{
var feedReader = new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
}
}
}
public virtual ISyndicationContent CreateContent(ISyndicationCategory category)
{
if (category == null)
{
throw new ArgumentNullException(nameof(category));
}
if (string.IsNullOrEmpty(category.Name))
{
throw new FormatException("Invalid category name");
}
return(new SyndicationContent(RssElementNames.Category, category.Name));
}
public void AddCategory(ISyndicationCategory category)
{
if (category == null)
{
throw new ArgumentNullException(nameof(category));
}
if (_categories.IsReadOnly)
{
_categories = _categories.ToList();
}
_categories.Add(category);
}
public async Task ReadCategory()
{
using (XmlReader xmlReader = XmlReader.Create(@"..\..\..\TestFeeds\simpleAtomFeed.xml", new XmlReaderSettings {
Async = true
}))
{
var reader = new AtomFeedReader(xmlReader);
while (await reader.Read())
{
if (reader.ElementType == SyndicationElementType.Category)
{
ISyndicationCategory category = await reader.ReadCategory();
Assert.True(category.Name == "sports");
Assert.True(category.Label == "testLabel");
Assert.True(category.Scheme == "testScheme");
}
}
}
}
public virtual ISyndicationContent CreateContent(ISyndicationCategory category)
{
if (category == null)
{
throw new ArgumentNullException(nameof(category));
}
if (string.IsNullOrEmpty(category.Name))
{
throw new FormatException("Invalid category name");
}
var content = new SyndicationContent(RssElementNames.Category, category.Name);
if (category.Scheme != null)
{
content.AddAttribute(new SyndicationAttribute(RssConstants.Domain, category.Scheme));
}
return(content);
}
public async Task ReadCategory()
{
using (var xmlReader = XmlReader.Create(@"..\..\..\TestFeeds\rss20.xml", new XmlReaderSettings()
{
Async = true
}))
{
var reader = new RssFeedReader(xmlReader);
while (await reader.Read())
{
if (reader.ElementType == SyndicationElementType.Category)
{
ISyndicationCategory category = await reader.ReadCategory();
Assert.True(category.Name == "Newspapers");
Assert.True(category.Scheme == "http://example.com/news");
}
}
}
}
public async Task <Podcast> ParseRssFeed(Podcast podcastData, bool isUpdate = false)
{
string title = string.Empty,
imageUrl = string.Empty,
description = string.Empty,
author = string.Empty;
DateTime pubDate = DateTime.MinValue,
lastUpdateDate = DateTime.MinValue;
List <ISyndicationItem> items = new List <ISyndicationItem>();
IEnumerable <PodcastItem> podcastItems = Enumerable.Empty <PodcastItem>();
Podcast podcast = null;
using (var xmlReader = XmlReader.Create(podcastData.Url, new XmlReaderSettings {
Async = true
}))
{
var feedReader = new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
case SyndicationElementType.Content:
ISyndicationContent content = await feedReader.ReadContent();
if (content.Name == "title")
{
title = content.Value;
}
if (content.Name == "description")
{
description = content.Value;
}
if (content.Name == "author")
{
author = content.Value;
}
break;
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
imageUrl = image.Url?.AbsoluteUri;
break;
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
items.Add(item);
break;
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
case SyndicationElementType.None:
default:
break;
}
}
pubDate = items.Max(item => item.Published.DateTime);
if (isUpdate)
{
lastUpdateDate = podcastData.LastUpdateDate;
podcastData.Author = author;
podcastData.Title = title;
podcastData.ImageUrl = imageUrl;
podcastData.Description = description;
podcastData.LastUpdateDate = pubDate;
podcast = podcastData;
await dataService.Update <Podcast>(podcast);
}
else
{
podcast = new Podcast(title, podcastData.Url, imageUrl, description, author)
{
LastUpdateDate = pubDate == DateTime.MinValue ? DateTime.Now : pubDate
};
await dataService.Insert <Podcast>(podcast);
}
podcastItems = items.Select(item => new
{
item.Title,
item.Description,
Enclosure = item.Links.FirstOrDefault(linkItem => linkItem.RelationshipType == "enclosure"),
PublishDate = item.Published.DateTime
}).Select(data => new PodcastItem(data.Title, data.Description, data.Enclosure.Uri.OriginalString,
data.Enclosure.Length, data.PublishDate, podcast.Id))
.Where(item => item.PublishDate > lastUpdateDate)
.ToList();
await dataService.Insert(podcastItems);
podcast.PodcastItems = podcastItems.ToList();
await dataService.Update(podcast);
}
return(podcast);
}
private async Task <List <BlogPost> > GetFeed()
{
var xmlReader = XmlReader.Create(_settings.Value.FeedUrl);
var reader = new AtomFeedReader(xmlReader);
var posts = new List <BlogPost>();
//
// Read the feed
while (await reader.Read())
{
//
// Check the type of the current element.
switch (reader.ElementType)
{
//
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await reader.ReadCategory();
break;
//
// Read image
case SyndicationElementType.Image:
ISyndicationImage image = await reader.ReadImage();
break;
//
// Read entry
case SyndicationElementType.Item:
IAtomEntry entry = await reader.ReadEntry();
// these are the only ones we need for now
posts.Add(new BlogPost
{
Title = entry.Title,
PublishedDate = entry.Published.DateTime,
Categories = entry.Categories?.Select(c => c.Name)?.ToList()
});
break;
//
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await reader.ReadLink();
break;
//
// Read person
case SyndicationElementType.Person:
ISyndicationPerson person = await reader.ReadPerson();
break;
//
// Read content
default:
ISyndicationContent content = await reader.ReadContent();
break;
}
}
return(posts);
}
public async Task <Channel9RssResult> Parse(Uri rssUri)
{
var result = new Channel9RssResult();
result.SourceUrl = rssUri;
try
{
using (var client = new HttpClient())
{
result.RawXml = await client.GetStringAsync(rssUri);
using (var xmlReader = XmlReader.Create(new StringReader(result.RawXml), new XmlReaderSettings()
{
Async = false
}))
{
var feedReader = new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
// parse the syndication item
ISyndicationItem item = await feedReader.ReadItem();
result.SyndicationItems.Add(item);
// then construct a session info
var si = new SessionInfo();
si.SessionID = item.Id.Substring(item.Id.LastIndexOf("/", StringComparison.InvariantCultureIgnoreCase) + 1);
si.Title = item.Title;
si.SessionSite = new Uri(item.Id);
si.PublishDate = item.Published.DateTime;
si.Presenter = item.Contributors.FirstOrDefault()?.Name;
result.Sessions.Add(si);
foreach (var v in item.Links)
{
if (!string.IsNullOrWhiteSpace(v.MediaType))
{
si.VideoRecordings.Add(new VideoRecording()
{
SessionInfo = si, Url = v.Uri, MediaType = v.MediaType, Length = v.Length
});
}
}
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
}
}
}
}
catch (Exception ex)
{
result.Exceptions = new List <Exception>();
result.Exceptions.Add(ex);
}
return(result);
}
async static Task <List <Tuple <string, string, DateTimeOffset> > > Latest5PostsFromRssAsync(string filePath)
{
List <Tuple <string, string, DateTimeOffset> > result = new List <Tuple <string, string, DateTimeOffset> >();
using (var xmlReader = XmlReader.Create(filePath, new XmlReaderSettings()
{
Async = true
}))
{
var feedReader = new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
result.Add(new Tuple <string, string, DateTimeOffset>(item.Title, item.Links.First().Uri.ToString(), item.Published));
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
if (result.Count == 5)
{
break;
}
}
}
return(result);
}
public string Format(ISyndicationCategory category)
{
ISyndicationContent content = CreateContent(category);
return(Format(content));
}
public static async Task ReadAtomFeed(string filePath)
{
//
// Create an XmlReader from file
// Example: ..\tests\TestFeeds\simpleAtomFeed.xml
using (XmlReader xmlReader = XmlReader.Create(filePath, new XmlReaderSettings()
{
Async = true
}))
{
//
// Create an AtomFeedReader
var reader = new AtomFeedReader(xmlReader);
//
// Read the feed
while (await reader.Read())
{
//
// Check the type of the current element.
switch (reader.ElementType)
{
//
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await reader.ReadCategory();
break;
//
// Read image
case SyndicationElementType.Image:
ISyndicationImage image = await reader.ReadImage();
break;
//
// Read entry
case SyndicationElementType.Item:
IAtomEntry entry = await reader.ReadEntry();
break;
//
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await reader.ReadLink();
break;
//
// Read person
case SyndicationElementType.Person:
ISyndicationPerson person = await reader.ReadPerson();
break;
//
// Read content
default:
ISyndicationContent content = await reader.ReadContent();
break;
}
}
}
}
public async Task ConsumeFeed(string filePath)
{
bool verbose = false;
// Information to display.
double size = new FileInfo(filePath).Length;
double currentSize = 0;
int itemsRead = 0;
// Transform the size of the file to Kb - Mb - Gb.
Tuple <double, string> sizeInfo = utils.ConvertBytesToSize(size);
// Display the Size of the feed and ask for verbose.
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine("Size of the Feed: {0:N2} {1}", sizeInfo.Item1, sizeInfo.Item2);
Console.Write("Verbose Items (Y/N): ");
Console.ForegroundColor = ConsoleColor.White;
string input = Console.ReadLine();
verbose = utils.ValidateVerbose(input);
Console.CursorVisible = false;
Stopwatch stopWatch = null;
using (var xmlReader = XmlReader.Create(filePath, new XmlReaderSettings()
{
Async = true
}))
{
var reader = new Rss20FeedReader(xmlReader);
stopWatch = new Stopwatch();
stopWatch.Start();
ElementDisplayer displayer = new ElementDisplayer();
while (await reader.Read())
{
if (verbose)
{
utils.ClearInformation();
}
switch (reader.ElementType)
{
case SyndicationElementType.Content:
ISyndicationContent content = await reader.ReadContent();
if (verbose)
{
displayer.DisplayContent(content);
}
break;
case SyndicationElementType.Item:
ISyndicationItem item = await ReadItem(reader);
itemsRead++;
if (verbose)
{
displayer.DisplayItem(item);
}
currentSize += _sizeOfItem;
break;
case SyndicationElementType.Person:
ISyndicationPerson person = await ReadPerson(reader);
if (verbose)
{
displayer.DisplayPerson(person);
}
break;
case SyndicationElementType.Image:
ISyndicationImage image = await ReadImage(reader);
if (verbose)
{
displayer.DisplayImage(image);
}
break;
case SyndicationElementType.Link:
ISyndicationLink link = await ReadLink(reader);
if (verbose)
{
displayer.DisplayLink(link);
}
break;
case SyndicationElementType.Category:
ISyndicationCategory category = await ReadCategory(reader);
if (verbose)
{
displayer.DisplayCategory(category);
}
break;
}
double percentage = ((currentSize * 100) / size);
if (itemsRead % 200 == 0)
{
utils.WriteInformation(percentage, itemsRead, stopWatch.Elapsed);
}
}
}
utils.ClearInformation();
//Print end of reading
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Finished Reading, press enter to close.\n\n");
utils.WriteInformation(100, itemsRead, stopWatch.Elapsed);
Console.ReadLine();
}
public string Format(ISyndicationCategory category)
{
return(Format(CreateContent(category)));
}
public static async Task ReadFeed()
{
using (XmlReader xmlReader = XmlReader.Create(@"..\DemoTest1\TestFeeds\rss20.xml", new XmlReaderSettings()
{
Async = true
}))
using (XmlWriter xmlWriter = XmlWriter.Create(Console.Out, new XmlWriterSettings()
{
Indent = true, Async = true
}))
{
Rss20FeedReader reader = new Rss20FeedReader(xmlReader);
Rss20FeedWriter writer = new Rss20FeedWriter(xmlWriter);
while (await reader.Read())
{
switch (reader.ElementType)
{
case SyndicationElementType.Category:
ISyndicationCategory category = await reader.ReadCategory();
await writer.Write(category);
break;
case SyndicationElementType.Image:
ISyndicationImage image = await reader.ReadImage();
await writer.Write(image);
break;
case SyndicationElementType.Item:
ISyndicationItem item = await reader.ReadItem();
await writer.Write(item);
break;
case SyndicationElementType.Link:
ISyndicationLink link = await reader.ReadLink();
await writer.Write(link);
break;
case SyndicationElementType.Person:
ISyndicationPerson person = await reader.ReadPerson();
await writer.Write(person);
break;
default:
ISyndicationContent content = await reader.ReadContent();
await writer.Write(content);
break;
}
xmlWriter.Flush();
// Simulate a slow stream.
Thread.Sleep(300);
}
}
}
internal void DisplayCategory(ISyndicationCategory category)
{
Console.WriteLine("--- Category Read ---");
Console.WriteLine("Category: " + category.Name);
Console.WriteLine();
}
public virtual Task Write(ISyndicationCategory category)
{
return(WriteRaw(Formatter.Format(category ?? throw new ArgumentNullException(nameof(category)))));
}
