private Opml DownloadOpmlFeed(Uri uri)
{
// look for disk cache first
Opml opmlFeed = TryLoadFromDisk(uri);
if (opmlFeed != null)
{
return(opmlFeed);
}
// May fail under partial trust
try
{
byte[] feed = new WebClient().DownloadData(uri.AbsoluteUri);
var opmlDoc = new XmlDocument();
opmlDoc.Load(new MemoryStream(feed));
opmlFeed = Opml.LoadFromXml(opmlDoc);
opmlFeed.UtcExpiry = DateTime.UtcNow.AddMinutes(_defaultTtlMinutes);
// save to disk
TrySaveToDisk(opmlDoc, uri, opmlFeed.UtcExpiry);
}
catch
{
return(new Opml());
}
return(opmlFeed);
}
internal Opml GetFeed(Uri uri)
{
Opml opmlFeed = null;
lock (_cache)
{
if (_cache.TryGetValue(uri.AbsoluteUri, out opmlFeed))
{
if (DateTime.UtcNow > opmlFeed.UtcExpiry)
{
_cache.Remove(uri.AbsoluteUri);
opmlFeed = null;
}
}
}
if (opmlFeed == null)
{
opmlFeed = DownloadOpmlFeed(uri);
lock (_cache)
{
_cache[uri.AbsoluteUri] = opmlFeed;
}
}
return(opmlFeed);
}
public static Opml LoadFromXml(XmlDocument doc)
{
var _out = new Opml();
try
{
// Parse head
XmlNode head = doc.GetElementsByTagName("head")[0];
XmlNode title = head.SelectSingleNode("./title");
XmlNode dateCreated = head.SelectSingleNode("./dateCreated");
XmlNode dateModified = head.SelectSingleNode("./dateModified");
XmlNode ownerName = head.SelectSingleNode("./ownerName");
XmlNode ownerEmail = head.SelectSingleNode("./ownerEmail");
XmlNode ownerId = head.SelectSingleNode("./ownerId");
XmlNode docs = head.SelectSingleNode("./docs");
XmlNode expansionState = head.SelectSingleNode("./expansionState");
XmlNode vertScrollState = head.SelectSingleNode("./vertScrollState");
XmlNode windowTop = head.SelectSingleNode("./windowTop");
XmlNode windowLeft = head.SelectSingleNode("./windowLeft");
XmlNode windowBottom = head.SelectSingleNode("./windowBottom");
XmlNode windowRight = head.SelectSingleNode("./windowRight");
if (title != null)
{
_out.Title = title.InnerText;
}
if (dateCreated != null)
{
_out.DateCreated = DateTime.Parse(dateCreated.InnerText);
}
if (dateModified != null)
{
_out.DateModified = DateTime.Parse(dateModified.InnerText);
}
if (ownerName != null)
{
_out.OwnerName = ownerName.InnerText;
}
if (ownerEmail != null)
{
_out.OwnerEmail = ownerEmail.InnerText;
}
if (ownerId != null)
{
_out.OwnerId = ownerId.InnerText;
}
if (docs != null)
{
_out.Docs = docs.InnerText;
}
if (expansionState != null)
{
_out.ExpansionState = expansionState.InnerText;
}
if (vertScrollState != null)
{
_out.VertScrollState = vertScrollState.InnerText;
}
if (windowTop != null)
{
_out.WindowTop = windowTop.InnerText;
}
if (windowLeft != null)
{
_out.WindowLeft = windowLeft.InnerText;
}
if (windowBottom != null)
{
_out.WindowBottom = windowBottom.InnerText;
}
if (windowLeft != null)
{
_out.WindowLeft = windowLeft.InnerText;
}
// Parse body
XmlNode body = doc.GetElementsByTagName("body")[0];
XmlNodeList outlineList = body.SelectNodes("./outline");
foreach (XmlElement outline in outlineList)
{
_out.Outlines.Add(ParseXml(outline));
}
return(_out);
}
catch
{
return(new Opml());
}
}
private Opml TryLoadFromDisk(Uri uri)
{
if (_directoryOnDisk == null)
{
return(null); // no place to cache
}
// look for all files matching the prefix
// looking for the one matching url that is not expired
// removing expired (or invalid) ones
string pattern = GetTempFileNamePrefixFromUrl(uri) + "_*.opml.resources";
string[] files = Directory.GetFiles(_directoryOnDisk, pattern, SearchOption.TopDirectoryOnly);
foreach (string opmlFilename in files)
{
XmlDocument opmlDoc = null;
bool isOpmlFileValid = false;
DateTime utcExpiryFromOpmlFile = DateTime.MinValue;
string urlFromOpmlFile = null;
try
{
opmlDoc = new XmlDocument();
opmlDoc.Load(opmlFilename);
// look for special XML comment (before the root tag)'
// containing expiration and url
var comment = opmlDoc.DocumentElement.PreviousSibling as XmlComment;
if (comment != null)
{
string c = comment.Value;
int i = c.IndexOf('@');
long expiry;
if (long.TryParse(c.Substring(0, i), out expiry))
{
utcExpiryFromOpmlFile = DateTime.FromBinary(expiry);
urlFromOpmlFile = c.Substring(i + 1);
isOpmlFileValid = true;
}
}
}
catch
{
// error processing one file shouldn't stop processing other files
}
// remove invalid or expired file
if (!isOpmlFileValid || utcExpiryFromOpmlFile < DateTime.UtcNow)
{
try
{
File.Delete(opmlFilename);
}
catch (Exception ex)
{
Logger.Error(ex);
}
// try next file
continue;
}
// match url
if (urlFromOpmlFile.ToLower() == uri.AbsoluteUri.ToLower())
{
// found a good one - create DOM and set expiry (as found on disk)
Opml opmlFeed = Opml.LoadFromXml(opmlDoc);
opmlFeed.UtcExpiry = utcExpiryFromOpmlFile;
return(opmlFeed);
}
}
// not found
return(null);
}
private Opml GetDefaultOpmlFeed()
{
var opmlFeed = new Opml();
string filePath = Config.GetPathToFile(Config.ConfigFileType.SolutionsExplorer);
if (File.Exists(filePath))
{
opmlFeed = Opml.LoadFromFile(filePath);
}
return opmlFeed;
}
protected override void OnLoad(EventArgs e)
{
var opmlFeed = new Opml();
string elementIdPrefix = ClientID;
string instanceVarName = elementIdPrefix + "_feedBrowser";
if (((String.IsNullOrEmpty(OpmlUrl)) && (String.IsNullOrEmpty(OpmlFile)) && (String.IsNullOrEmpty(OpmlText))))
{
opmlFeed = GetDefaultOpmlFeed();
}
else
{
if ((!String.IsNullOrEmpty(OpmlText)))
{
var opmlDoc = new XmlDocument();
opmlDoc.LoadXml("<?xml version=\"1.0\" encoding=\"utf-8\"?><opml version=\"2.0\"><head /><body>" + OpmlText + "</body></opml>");
opmlFeed = Opml.LoadFromXml(opmlDoc);
}
else if ((!String.IsNullOrEmpty(OpmlUrl)))
{
opmlFeed = Opml.LoadFromUrl(new Uri(OpmlUrl));
}
else
{
opmlFeed = Opml.LoadFromFile(OpmlFile);
}
}
var script = new StringBuilder();
string tabInstanceVarName = instanceVarName + "_tabs";
script.Append("var " + tabInstanceVarName + " = new DotNetNuke.UI.WebControls.TabStrip.Strip(\"" + tabInstanceVarName + "\");");
script.Append("var " + instanceVarName + " = new DotNetNuke.UI.WebControls.FeedBrowser.Browser(\"" + instanceVarName + "\"," + tabInstanceVarName + ");");
script.Append(tabInstanceVarName + ".setResourcesFolderUrl(\"" + ResourcesFolderUrl + "\");");
script.Append(instanceVarName + ".setResourcesFolderUrl(\"" + ResourcesFolderUrl + "\");");
script.Append(instanceVarName + ".setElementIdPrefix(\"" + elementIdPrefix + "\");");
if ((!String.IsNullOrEmpty(Theme)))
{
script.Append(instanceVarName + ".setTheme(\"" + Theme + "\");");
}
if ((!String.IsNullOrEmpty(RssProxyUrl)))
{
script.Append(instanceVarName + ".setRssProxyUrl(\"" + RssProxyUrl + "\");");
}
if ((!String.IsNullOrEmpty(DefaultTemplate)))
{
script.Append(instanceVarName + ".setDefaultTemplate(\"" + DefaultTemplate + "\");");
}
script.Append(instanceVarName + ".setAllowHtmlDescription(");
if ((AllowHtmlDescription))
{
script.Append("true");
}
else
{
script.Append("false");
}
script.Append(");");
string renderScript = GetRenderingScript(instanceVarName, opmlFeed.Outlines);
bool includeFallbackScript = false;
//Is there any OPML structure to render?
if ((String.IsNullOrEmpty(renderScript)))
{
includeFallbackScript = true;
script.Append(instanceVarName + ".setTabs(defaultFeedBrowser());");
}
else
{
//Javascript function that renders the OPML structure
script.Append("function " + instanceVarName + "customFeedBrowser() ");
script.Append("{");
script.Append(" var " + instanceVarName + "tabs = [];");
script.Append(" with (DotNetNuke.UI.WebControls.FeedBrowser) ");
script.Append(" {");
script.Append(renderScript);
script.Append(" }");
script.Append(" return(" + instanceVarName + "tabs);");
script.Append("} ");
script.Append(instanceVarName + ".setTabs(" + instanceVarName + "customFeedBrowser());");
}
//NK 11/25/08
//This code has a jQuery dependency so it can't be loaded using standard client script registration
//It must come later in the page which is why it is inline; also ClientScript buggy when used in webcontrols
if (!Page.ClientScript.IsClientScriptBlockRegistered("FBHostUrl"))
{
Page.ClientScript.RegisterClientScriptBlock(GetType(),
"FBHostUrl",
"<script type=\"text/javascript\">var $dnn = new Object(); $dnn.hostUrl = '" + Globals.ResolveUrl("~/") + "';</script>");
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/Shared/scripts/init.js") + "\"></script>");
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/Shared/scripts/DotNetNukeAjaxShared.js") + "\"></script>");
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/TabStrip/scripts/tabstrip.js") + "\"></script>");
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/FeedBrowser/scripts/feedbrowser.js") + "\"></script>");
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/FeedBrowser/scripts/templates.js") + "\"></script>");
if ((includeFallbackScript))
{
output.Append("<script type=\"text/javascript\" src=\"" + Globals.ResolveUrl("~/Resources/FeedBrowser/scripts/fallback.js") + "\"></script>");
}
if ((!String.IsNullOrEmpty(StyleSheetUrl)))
{
script.Append(tabInstanceVarName + ".setStyleSheetUrl(\"" + StyleSheetUrl + "\");");
script.Append(instanceVarName + ".setStyleSheetUrl(\"" + StyleSheetUrl + "\");");
}
}
script.Append(instanceVarName + ".render();");
output.Append("<script type=\"text/javascript\">" + script + "</script>");
base.OnLoad(e);
}
public static Opml LoadFromXml(XmlDocument doc)
{
var _out = new Opml();
try
{
// Parse head
XmlNode head = doc.GetElementsByTagName("head")[0];
XmlNode title = head.SelectSingleNode("./title");
XmlNode dateCreated = head.SelectSingleNode("./dateCreated");
XmlNode dateModified = head.SelectSingleNode("./dateModified");
XmlNode ownerName = head.SelectSingleNode("./ownerName");
XmlNode ownerEmail = head.SelectSingleNode("./ownerEmail");
XmlNode ownerId = head.SelectSingleNode("./ownerId");
XmlNode docs = head.SelectSingleNode("./docs");
XmlNode expansionState = head.SelectSingleNode("./expansionState");
XmlNode vertScrollState = head.SelectSingleNode("./vertScrollState");
XmlNode windowTop = head.SelectSingleNode("./windowTop");
XmlNode windowLeft = head.SelectSingleNode("./windowLeft");
XmlNode windowBottom = head.SelectSingleNode("./windowBottom");
XmlNode windowRight = head.SelectSingleNode("./windowRight");
if (title != null)
{
_out.Title = title.InnerText;
}
if (dateCreated != null)
{
_out.DateCreated = DateTime.Parse(dateCreated.InnerText);
}
if (dateModified != null)
{
_out.DateModified = DateTime.Parse(dateModified.InnerText);
}
if (ownerName != null)
{
_out.OwnerName = ownerName.InnerText;
}
if (ownerEmail != null)
{
_out.OwnerEmail = ownerEmail.InnerText;
}
if (ownerId != null)
{
_out.OwnerId = ownerId.InnerText;
}
if (docs != null)
{
_out.Docs = docs.InnerText;
}
if (expansionState != null)
{
_out.ExpansionState = expansionState.InnerText;
}
if (vertScrollState != null)
{
_out.VertScrollState = vertScrollState.InnerText;
}
if (windowTop != null)
{
_out.WindowTop = windowTop.InnerText;
}
if (windowLeft != null)
{
_out.WindowLeft = windowLeft.InnerText;
}
if (windowBottom != null)
{
_out.WindowBottom = windowBottom.InnerText;
}
if (windowLeft != null)
{
_out.WindowLeft = windowLeft.InnerText;
}
// Parse body
XmlNode body = doc.GetElementsByTagName("body")[0];
XmlNodeList outlineList = body.SelectNodes("./outline");
foreach (XmlElement outline in outlineList)
{
_out.Outlines.Add(ParseXml(outline));
}
return _out;
}
catch
{
return (new Opml());
}
}