public static TransitAccountFeedWithItems Discover(string url, string useragent)
{
TransitAccountFeedWithItems feed = null;
if (string.IsNullOrEmpty(url))
{
throw new Exception("Missing Url");
}
if (!Uri.IsWellFormedUriString(url, UriKind.Absolute))
{
throw new Exception(string.Format("Invalid url: {0}", url));
}
feed = discoverRss(url, useragent);
if (feed == null)
{
feed = discoverAtom(url, useragent, new Uri("http://www.w3.org/2005/Atom"));
}
if (feed == null)
{
feed = discoverAtom(url, useragent, new Uri("http://purl.org/atom/ns#"));
}
return(feed);
}
public void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string useragent = SessionManager.GetCachedConfiguration("SnCore.Web.UserAgent", "SnCore/1.0");
TransitAccountFeedWithItems f = TransitAccountFeedWithItems.Discover(Request["url"], useragent);
if (f == null)
{
ReportInfo(string.Format("Sorry, {0} is not a valid RSS or ATOM feed.",
Renderer.Render(Request["url"])));
panelAll.Visible = false;
return;
}
mAccountFeed = f;
labelFeed.Text = Renderer.Render(f.Name);
labelFeed.NavigateUrl = f.LinkUrl;
labelFeedDescription.Text = Renderer.Render(f.Description);
labelAccountName.Text = Renderer.Render(SessionManager.Account.Name);
linkAccount.HRef = string.Format("AccountView.aspx?id={0}", SessionManager.Account.Id);
imageAccount.Src = string.Format("AccountPictureThumbnail.aspx?id={0}", SessionManager.Account.PictureId);
this.Title = string.Format("{0}'s {1}", Renderer.Render(SessionManager.Account.Name), Renderer.Render(f.Name));
if (f.FeedItems.Count > gridManage.PageSize)
{
f.FeedItems.RemoveRange(gridManage.PageSize,
f.FeedItems.Count - gridManage.PageSize);
}
gridManage.DataSource = f.FeedItems;
gridManage.DataBind();
SiteMapDataAttribute sitemapdata = new SiteMapDataAttribute();
sitemapdata.Add(new SiteMapDataAttributeNode("Blogs", Request, "AccountFeedItemsView.aspx"));
sitemapdata.Add(new SiteMapDataAttributeNode(f.Name, Request.Url));
StackSiteMap(sitemapdata);
}
}
protected static TransitAccountFeedWithItems discoverRss(string url, string useragent)
{
try
{
RssFeed rssfeed = RssFeed.Read(GetFeedHttpRequest(url, useragent));
foreach (RssChannel rsschannel in rssfeed.Channels)
{
TransitAccountFeedWithItems result = new TransitAccountFeedWithItems();
result.Description = rsschannel.Description;
result.FeedUrl = url;
result.LinkUrl = rsschannel.Link.ToString();
result.Name = rsschannel.Title;
foreach(RssItem rssitem in rsschannel.Items)
{
TransitAccountFeedItem item = new TransitAccountFeedItem();
item.AccountFeedLinkUrl = result.LinkUrl;
item.AccountFeedName = result.Name;
item.Created = rssitem.PubDate;
item.Description = rssitem.Description;
item.Link = rssitem.Link.ToString();
item.Title = rssitem.Title;
item.Updated = DateTime.UtcNow;
result.FeedItems.Add(item);
}
return result;
}
}
catch
{
}
return null;
}
protected static TransitAccountFeedWithItems discoverRss(string url, string useragent)
{
try
{
RssFeed rssfeed = RssFeed.Read(GetFeedHttpRequest(url, useragent));
foreach (RssChannel rsschannel in rssfeed.Channels)
{
TransitAccountFeedWithItems result = new TransitAccountFeedWithItems();
result.Description = rsschannel.Description;
result.FeedUrl = url;
result.LinkUrl = rsschannel.Link.ToString();
result.Name = rsschannel.Title;
foreach (RssItem rssitem in rsschannel.Items)
{
TransitAccountFeedItem item = new TransitAccountFeedItem();
item.AccountFeedLinkUrl = result.LinkUrl;
item.AccountFeedName = result.Name;
item.Created = rssitem.PubDate;
item.Description = rssitem.Description;
item.Link = rssitem.Link.ToString();
item.Title = rssitem.Title;
item.Updated = DateTime.UtcNow;
result.FeedItems.Add(item);
}
return(result);
}
}
catch
{
}
return(null);
}
protected static TransitAccountFeedWithItems discoverAtom(string url, string useragent, Uri ns)
{
try
{
AtomFeed atomfeed = AtomFeed.Load(GetFeedStream(url, useragent), ns);
TransitAccountFeedWithItems result = new TransitAccountFeedWithItems();
if (atomfeed.SubTitle != null)
{
result.Description = atomfeed.SubTitle.Content;
}
else if (atomfeed.Tagline != null)
{
result.Description = atomfeed.Tagline.Content;
}
result.FeedUrl = url;
if (atomfeed.Links != null)
{
foreach (AtomLink link in atomfeed.Links)
{
if (link.Rel == Relationship.Alternate)
{
result.LinkUrl = link.HRef.ToString();
break;
}
}
}
if (atomfeed.Title != null)
{
result.Name = atomfeed.Title.Content;
}
foreach (AtomEntry atomitem in atomfeed.Entries)
{
TransitAccountFeedItem item = new TransitAccountFeedItem();
item.Description = string.Empty;
foreach (AtomContent content in atomitem.Contents)
{
if (!string.IsNullOrEmpty(item.Description))
item.Description += "\n";
switch (content.Type)
{
case MediaType.TextHtml:
item.Description += HttpUtility.HtmlDecode(content.Content);
break;
default:
item.Description += content.Content;
break;
}
}
if (string.IsNullOrEmpty(item.Description))
{
item.Description = atomitem.Summary.Content;
}
item.Title = atomitem.Title.Content;
if (atomitem.Links.Count > 0)
{
foreach (AtomLink link in atomitem.Links)
{
if (link.Rel == Relationship.Alternate)
{
item.Link = link.HRef.ToString();
}
}
}
if (atomitem.Id != null && !string.IsNullOrEmpty(atomitem.Id.ToString())) item.Guid = atomitem.Id.ToString();
if (atomitem.Created != null && atomitem.Created.DateTime.Ticks > 0) item.Created = atomitem.Created.DateTime.ToUniversalTime();
result.FeedItems.Add(item);
}
return result;
}
catch
{
return null;
}
}
public void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string useragent = SessionManager.GetCachedConfiguration("SnCore.Web.UserAgent", "SnCore/1.0");
TransitAccountFeedWithItems f = TransitAccountFeedWithItems.Discover(Request["url"], useragent);
if (f == null)
{
ReportInfo(string.Format("Sorry, {0} is not a valid RSS or ATOM feed.",
Renderer.Render(Request["url"])));
panelAll.Visible = false;
return;
}
mAccountFeed = f;
labelFeed.Text = Renderer.Render(f.Name);
labelFeed.NavigateUrl = f.LinkUrl;
labelFeedDescription.Text = Renderer.Render(f.Description);
labelAccountName.Text = Renderer.Render(SessionManager.Account.Name);
linkAccount.HRef = string.Format("AccountView.aspx?id={0}", SessionManager.Account.Id);
imageAccount.Src = string.Format("AccountPictureThumbnail.aspx?id={0}", SessionManager.Account.PictureId);
this.Title = string.Format("{0}'s {1}", Renderer.Render(SessionManager.Account.Name), Renderer.Render(f.Name));
if (f.FeedItems.Count > gridManage.PageSize)
{
f.FeedItems.RemoveRange(gridManage.PageSize,
f.FeedItems.Count - gridManage.PageSize);
}
gridManage.DataSource = f.FeedItems;
gridManage.DataBind();
SiteMapDataAttribute sitemapdata = new SiteMapDataAttribute();
sitemapdata.Add(new SiteMapDataAttributeNode("Blogs", Request, "AccountFeedItemsView.aspx"));
sitemapdata.Add(new SiteMapDataAttributeNode(f.Name, Request.Url));
StackSiteMap(sitemapdata);
}
}
protected static TransitAccountFeedWithItems discoverAtom(string url, string useragent, Uri ns)
{
try
{
AtomFeed atomfeed = AtomFeed.Load(GetFeedStream(url, useragent), ns);
TransitAccountFeedWithItems result = new TransitAccountFeedWithItems();
if (atomfeed.SubTitle != null)
{
result.Description = atomfeed.SubTitle.Content;
}
else if (atomfeed.Tagline != null)
{
result.Description = atomfeed.Tagline.Content;
}
result.FeedUrl = url;
if (atomfeed.Links != null)
{
foreach (AtomLink link in atomfeed.Links)
{
if (link.Rel == Relationship.Alternate)
{
result.LinkUrl = link.HRef.ToString();
break;
}
}
}
if (atomfeed.Title != null)
{
result.Name = atomfeed.Title.Content;
}
foreach (AtomEntry atomitem in atomfeed.Entries)
{
TransitAccountFeedItem item = new TransitAccountFeedItem();
item.Description = string.Empty;
foreach (AtomContent content in atomitem.Contents)
{
if (!string.IsNullOrEmpty(item.Description))
{
item.Description += "\n";
}
switch (content.Type)
{
case MediaType.TextHtml:
item.Description += HttpUtility.HtmlDecode(content.Content);
break;
default:
item.Description += content.Content;
break;
}
}
if (string.IsNullOrEmpty(item.Description))
{
item.Description = atomitem.Summary.Content;
}
item.Title = atomitem.Title.Content;
if (atomitem.Links.Count > 0)
{
foreach (AtomLink link in atomitem.Links)
{
if (link.Rel == Relationship.Alternate)
{
item.Link = link.HRef.ToString();
}
}
}
if (atomitem.Id != null && !string.IsNullOrEmpty(atomitem.Id.ToString()))
{
item.Guid = atomitem.Id.ToString();
}
if (atomitem.Created != null && atomitem.Created.DateTime.Ticks > 0)
{
item.Created = atomitem.Created.DateTime.ToUniversalTime();
}
result.FeedItems.Add(item);
}
return(result);
}
catch
{
return(null);
}
}
