/// <summary>
/// Function to process the "requestvar" skin tag. Determines the specified
/// collection and calls out to a helper function in SkinUtil to process
/// the directive from the specified Http collection.
/// </summary>
/// <param name="req">The current HTTP Request</param>
/// <param name="n">The current skin directive node</param>
protected void RequestVar(HttpRequest req, XmlNode n)
{
//Get the specified http request collection
string colName = GetAttribNull(n, "collection");
//if the collection is not specified, default to the "params" collection
if (colName == null)
{
colName = "Params";
}
switch (colName)
{
case "QueryString":
//Since the querystring, form, servervariables and params collections
//are simple name value collections and all of the same type, the
//code to process the requestvar directive has been factored into a
//helper function.
NameValCol(req.QueryString, n);
break;
case "Form":
NameValCol(req.Form, n);
break;
case "ServerVariables":
NameValCol(req.ServerVariables, n);
break;
case "Params":
NameValCol(req.Params, n);
break;
case "Cookies":
//since cookies is handled seperately, there's no point in factoring
//the code into a seperate function.
XmlNode newNode = SkinUtil.CookieCol(n.ParentNode, req.Cookies, GetAttribNull(n, "name"), GetAttribNull(n, "namespace"));
ReplaceNode(n.ParentNode, newNode, n);
break;
default:
throw new Exception("Unrecognized Request Var collection name: " + colName);
}
}
/// <summary>
/// Member of the IHttpHandler interface
/// Process a dynamic web page request
/// </summary>
/// <param name="context">represents the current web page request</param>
public void ProcessRequest(HttpContext context)
{
#if DEBUG
if (context.Request["__admin"] != null)
{
if (context.Request["__admin"].ToUpper() == "showXml".ToUpper())
{
System.Xml.XmlDocument dom = new System.Xml.XmlDocument();
dom.Load(context.Request.PhysicalPath);
dom.Save(context.Response.Output);
return;
}
}
#endif
ListDictionary objDict = null;
try
{
//Load the XML document indicated in the request
XmlDocument dom = new XmlDocument();
dom.Load(context.Request.PhysicalPath);
//get a list of all the nodes in the SkinUI Namespace
XmlNodeList l = dom.GetElementsByTagName("*", SkinUtil.SkinUINamespace);
//Initalize the XSLT variable
//Create a new object dictionary to store variable declarations
TransformInfo xsltInfo = null;
objDict = new ListDictionary();
//process each of the SkinUI Nodes. Note, since we delete each WebSkin
//node as we process it, we just need to keep processing the top element
//of the list until the list is empty.
while (l.Count > 0)
{
XmlNode n = l[0];
switch (n.LocalName)
{
case "class":
ClassDecl(context, n, objDict);
break;
case "methodcall":
MethodCall(context, n, objDict);
break;
case "database":
DatabaseDecl(n, objDict);
break;
case "query":
Query(context, n, objDict);
break;
case "requestvar":
RequestVar(context.Request, n);
break;
case "transform":
if (xsltInfo != null)
{
throw new Exception("Multiple SkinUI Transform tags found");
}
xsltInfo = new TransformInfo(n);
n.ParentNode.RemoveChild(n);
break;
default:
throw new Exception("Unrecognized SkinUI tag name: " + n.LocalName);
}
}
//Delete any namespace declarations off the root node for the SkinUI namespace
for (int i = dom.DocumentElement.Attributes.Count - 1; i >= 0; i--)
{
XmlAttribute a = dom.DocumentElement.Attributes[i];
if (a.Value == SkinUtil.SkinUINamespace && a.Prefix == "xmlns")
{
a.OwnerElement.Attributes.Remove(a);
}
}
//Get the XSLT file to use in transforms from the controller class
string xsltFile = "";
if (xsltInfo != null)
{
if (xsltInfo.defaultTransform != "")
{
xsltFile = context.Request.PhysicalApplicationPath + xsltInfo.defaultTransform;
}
else
{
Object o = objDict[xsltInfo.variable];
xsltFile = GetXSLTemplate(o, xsltInfo.method, context);
}
}
//Call the helper function to perform the actual XSLT Transform
SkinUtil.Transform(dom, xsltFile, context);
}
catch (Exception ex)
{
//Catch any exception and add it to the context as an HTTP exception
HttpException h = new HttpException(500, ex.Message, ex);
context.AddError(h);
}
finally
{
if (objDict != null)
{
//Close and release all entries in the object dictionary
foreach (DictionaryEntry entry in objDict)
{
if (entry.Value is SqlConnection)
{
((SqlConnection)entry.Value).Close();
}
}
}
}
}
/// <summary>
/// helper function to process generic HTTP request name value collections
/// </summary>
/// <param name="col">the collection to retrieve the value(s) from</param>
/// <param name="n">The current skin directive node</param>
protected void NameValCol(NameValueCollection col, XmlNode n)
{
XmlNode newNode = SkinUtil.NameValCol(n.ParentNode, col, GetAttribNull(n, "name"), GetAttribNull(n, "namespace"));
ReplaceNode(n.ParentNode, newNode, n);
}
