protected override async Task <IEnumerable <IDocument> > ExecuteInputAsync(IDocument input, IExecutionContext context)
{
string feed = input.GetString("Feed");
if (!string.IsNullOrEmpty(feed))
{
try
{
// Download the feed
context.LogInformation($"Getting feed for {feed}");
Uri website = null;
string title = null;
string author = null;
string description = null;
string image = null;
List <ISyndicationItem> items = new List <ISyndicationItem>();
using (HttpClient httpClient = context.CreateHttpClient())
{
httpClient.DefaultRequestHeaders.Add("User-Agent", "Wyam");
var response = await httpClient.GetAsync(feed);
if (response.StatusCode == HttpStatusCode.Redirect ||
response.StatusCode == HttpStatusCode.MovedPermanently)
{
context.LogWarning($"Attempting to follow redirect for {feed}");
feed = response.Headers.Location.OriginalString;
response = await httpClient.GetAsync(feed);
}
if (response.IsSuccessStatusCode)
{
using (Stream stream = await response.Content.ReadAsStreamAsync())
using (StreamReader streamReader = new XmlStreamReader(stream))
using (XmlReader xmlReader = XmlReader.Create(streamReader, new XmlReaderSettings {
Async = true, DtdProcessing = DtdProcessing.Ignore
}))
{
xmlReader.MoveToContent();
bool atom = xmlReader.Name == "feed";
context.LogInformation($"Reading {feed} as " + (atom ? "Atom" : "RSS"));
XmlFeedReader feedReader = atom
? (XmlFeedReader) new AtomFeedReader(xmlReader, new FixedAtomParser())
: new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
try
{
switch (feedReader.ElementType)
{
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
if (person.RelationshipType == "author")
{
author = person.Name ?? person.Email;
}
break;
case SyndicationElementType.Image:
ISyndicationImage img = await feedReader.ReadImage();
image = img.Url.ToString();
break;
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
website = link.Uri;
break;
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
items.Add(item);
break;
case SyndicationElementType.None:
break;
default:
ISyndicationContent content = await feedReader.ReadContent();
if (string.Equals(content.Name, "title", StringComparison.OrdinalIgnoreCase))
{
title = content.Value;
}
else if (string.Equals(content.Name, "description", StringComparison.OrdinalIgnoreCase) ||
string.Equals(content.Name, "subtitle", StringComparison.OrdinalIgnoreCase))
{
description = content.Value;
}
break;
}
}
catch (Exception ex)
{
context.LogWarning($"Exception while processing {feedReader.ElementType} in {feed}: {ex.Message}");
}
}
}
}
// Get a new document with feed metadata
MetadataItems metadata = new MetadataItems();
if (items.Count > 0)
{
BlogFeedItem[] feedItems = items
.Select(x => new BlogFeedItem(x, _recent, website))
.OrderByDescending(x => x.Published)
.Take(50) // Only take the 50 most recent items
.ToArray();
metadata.Add(SiteKeys.BlogFeedItems, feedItems);
return(input.Clone(metadata).Yield());
}
}
}
catch (Exception ex)
{
context.LogWarning($"Error getting feed for {feed}: {ex.Message}");
}
}
else
{
var speaker = input.GetString("Title");
if (!string.IsNullOrWhiteSpace(speaker))
{
context.LogWarning($"No RSS specified for {speaker}.");
}
else
{
context.LogWarning($"No RSS specified for unknown speaker.");
}
}
return(input.Yield());
}
protected override async Task <IEnumerable <IDocument> > ExecuteInputAsync(IDocument input, IExecutionContext context)
{
// Don't get data if we're just validating
if (context.Settings.GetBool(SiteKeys.Validate))
{
return(null);
}
string feed = input.GetString(SiteKeys.Feed);
if (!string.IsNullOrEmpty(feed))
{
try
{
// Download the feed
context.LogInformation($"Getting feed for {feed}");
Uri website = null;
string title = null;
string author = null;
string description = null;
string image = null;
List <ISyndicationItem> items = new List <ISyndicationItem>();
using (HttpClient httpClient = context.CreateHttpClient())
{
httpClient.DefaultRequestHeaders.Add("User-Agent", nameof(Statiq));
using (Stream stream = await httpClient.GetStreamAsync(feed))
{
using (StreamReader streamReader = new XmlStreamReader(stream))
{
using (XmlReader xmlReader = XmlReader.Create(streamReader, new XmlReaderSettings {
Async = true, DtdProcessing = DtdProcessing.Ignore
}))
{
xmlReader.MoveToContent();
bool atom = xmlReader.Name == "feed";
context.LogInformation($"Reading {feed} as " + (atom ? "Atom" : "RSS"));
XmlFeedReader feedReader = atom
? (XmlFeedReader) new AtomFeedReader(xmlReader, new DiscoverAtomParser())
: new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
try
{
switch (feedReader.ElementType)
{
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
if (person.RelationshipType == "author")
{
author = person.Name ?? person.Email;
}
break;
case SyndicationElementType.Image:
ISyndicationImage img = await feedReader.ReadImage();
image = img.Url.ToString();
break;
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
website = link.Uri;
break;
case SyndicationElementType.Item:
ISyndicationItem item = await feedReader.ReadItem();
items.Add(item);
break;
case SyndicationElementType.None:
break;
default:
ISyndicationContent content = await feedReader.ReadContent();
if (string.Equals(content.Name, "title", StringComparison.OrdinalIgnoreCase))
{
title = content.Value;
}
else if (string.Equals(content.Name, "description", StringComparison.OrdinalIgnoreCase) ||
string.Equals(content.Name, "subtitle", StringComparison.OrdinalIgnoreCase))
{
description = content.Value;
}
break;
}
}
catch (Exception ex)
{
context.LogWarning($"Exception while processing {feedReader.ElementType} in {feed}: {ex.Message}");
}
}
}
}
}
}
// Get a new document with feed metadata
MetadataItems metadata = new MetadataItems();
if (items.Count > 0)
{
FeedItem[] feedItems = items
.Select(x => new FeedItem(x, _recent, website, _truncateDescription, context))
.OrderByDescending(x => x.Published)
.Take(50) // Only take the 50 most recent items
.ToArray();
metadata.Add(SiteKeys.FeedItems, feedItems);
metadata.Add(SiteKeys.LastPublished, feedItems.First().Published);
metadata.Add(SiteKeys.NewestFeedItem, feedItems[0]);
}
if (!input.ContainsKey(SiteKeys.Website) && website != null)
{
metadata.Add(SiteKeys.Website, website.ToString());
}
if (!input.ContainsKey(SiteKeys.Title))
{
if (!string.IsNullOrEmpty(title))
{
metadata.Add(SiteKeys.Title, title);
}
else
{
string generatedTitle = GenerateTitleFromFeedName(feed);
metadata.Add(SiteKeys.Title, generatedTitle);
}
}
if (!input.ContainsKey(SiteKeys.Author) && !string.IsNullOrEmpty(author))
{
metadata.Add(SiteKeys.Author, author);
}
if (!input.ContainsKey(SiteKeys.Description) && !string.IsNullOrEmpty(description))
{
metadata.Add(SiteKeys.Description, description);
}
if (!input.ContainsKey(SiteKeys.Image) && !string.IsNullOrEmpty(image))
{
metadata.Add(SiteKeys.Image, image);
}
return(input.Clone(metadata).Yield());
}
catch (Exception ex)
{
context.LogWarning($"Error getting feed for {feed}: {ex.Message}");
}
}
// Return null so this feed is not included
return(null);
}