// Rewrites before displaying HTML code
private static void RewritePipeHtmlRewriteUrl(object sender, HtmlRewriteEventArgs e)
{
try
{
IEnumerable<ProviderSettings> providerSettings = Helpers.AmazonS3VirtualPathHelper.GetAllSettings();
if (!providerSettings.Any())
{
return;
}
foreach (ProviderSettings providerSetting in providerSettings)
{
string virtualPath = Helpers.AmazonS3VirtualPathHelper.GetVirtualPath(providerSetting);
if (e.Value.StartsWith(virtualPath))
{
string url = Helpers.AmazonS3VirtualPathHelper.GetBaseUrl(providerSetting);
e.ValueBuilder.Replace(virtualPath, string.Empty);
e.ValueBuilder.Insert(0, url);
}
}
}
catch (Exception ex)
{
Log.Error(ex.Message);
// Important to never throw an exception in the friendly URL handling.
}
}
/// <summary>
/// Init the HtmlRewrite-engines event handlers. This is called every time a HtmlRewritePipe object
/// is instantiated by the UrlRewriteModule
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
static private void HtmlRewriteToExternal_HtmlRewriteInit(object sender, HtmlRewriteEventArgs e)
{
// We need an instance of ourselves, to keep track of our state
ViewStateMover viewStateMover = new ViewStateMover();
// There are two major events from the HtmlRewrite-engine, which allow us to rewrite
// names and values of the content. The exact definition depends on the XmlNodeType
// that is being processed.
e.RewritePipe.HtmlRewriteName += viewStateMover.HtmlRewriteNameEventHandler;
e.RewritePipe.HtmlRewriteValue += viewStateMover.HtmlRewriteValueEventHandler;
}
/// <summary>
/// Handle rewrite name
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// The name event is raised before an associated value event. Check the e.NodeType and other properties to determine
/// course of action.
/// </remarks>
private void HtmlRewriteNameEventHandler(object sender, HtmlRewriteEventArgs e)
{
switch (_state)
{
case State.WaitingForForm:
if (e.NodeType == XmlNodeType.Element && String.Compare(e.Name, "form", StringComparison.OrdinalIgnoreCase) == 0)
{
_state = State.InFormElement;
}
break;
case State.InFormElement:
if (e.NodeType != XmlNodeType.Element)
{
break;
}
if (String.Compare(e.Name, "input", StringComparison.OrdinalIgnoreCase) == 0)
{
_inputAttributes.Clear();
e.IsHoldingOutput = true;
_state = State.BufferingInput;
break;
}
// If we've seen ViewState, we either buffer script, or emit previously buffered script because
// we're not at the end of the form element yet.
if (_viewState.Count > 0)
{
if (String.Compare(e.Name, "script", StringComparison.OrdinalIgnoreCase) == 0)
{
_scripts.Append("<script");
e.IsHoldingOutput = true;
_state = State.BufferingScript;
break;
}
// If we find an element inside the form element and we have scripts buffered, we change our
// mind and output it anyway, since we want to ensure that only the last scripts are output
// after the ViewState (which should be the ones registred as startup script).
if (_scripts.Length > 0)
{
e.ValueBuilder.Length = 0;
e.ValueBuilder.Append(_scripts);
_scripts.Length = 0;
e.ValueBuilder.Append("<").Append(e.Name);
}
}
break;
}
}
/// <summary>
/// Handle rewrite value
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// The value event is raised after an associated name event. Check the e.NodeType and other properties to determine
/// course of action.
/// </remarks>
private void HtmlRewriteValueEventHandler(object sender, HtmlRewriteEventArgs e)
{
// Remove all insignificant whitespace
if (_enableWhitespaceRemoval && e.NodeType == XmlNodeType.Whitespace)
{
e.ValueBuilder.Length = 0;
e.ValueBuilder.Append(" ");
return;
}
switch (_state)
{
// We're buffering the contents of input element attributes, while checking for if it is a ViewState field
case State.BufferingInput:
switch (e.NodeType)
{
// Another attribute, add it to the collection and check if it's a ViewState
case XmlNodeType.Attribute:
_inputAttributes.Add(e.Name, new AttributeValue(e.Value, e.QuoteChar));
_viewStateFound |= String.Compare(e.Name, "name", StringComparison.OrdinalIgnoreCase) == 0 && e.Value.StartsWith("__VIEWSTATE");
e.IsHoldingOutput = true;
break;
// End of the input element start tag. Determine if we're to output and continue waiting, or if it's the ViewState,
// in which case we switch state, and output nothing here.
case XmlNodeType.Element:
if (_viewStateFound && e.IsEmptyElement)
{
e.IsHoldingOutput = true;
_viewState.Add(_inputAttributes);
_inputAttributes = new Dictionary <string, AttributeValue>();
_state = State.InFormElement;
}
else
{
e.ValueBuilder.Length = 0;
AppendInputElement(e.ValueBuilder, _inputAttributes, e.IsEmptyElement);
_inputAttributes.Clear();
_state = State.InFormElement;
}
_viewStateFound = false;
break;
}
break;
case State.BufferingScript:
bool isHoldingOutput = true;
switch (e.NodeType)
{
case XmlNodeType.Attribute:
_scripts.AppendFormat(" {0}={2}{1}{2}", e.Name, HttpUtility.HtmlAttributeEncode(e.Value), e.QuoteChar);
break;
case XmlNodeType.Comment:
case XmlNodeType.SignificantWhitespace:
case XmlNodeType.Text:
case XmlNodeType.CDATA:
_scripts.Append(e.Value);
break;
case XmlNodeType.Element:
_scripts.Append(e.Value);
if (e.IsEmptyElement)
{
_state = State.InFormElement;
}
break;
case XmlNodeType.EndElement:
_scripts.Append(e.Value);
_state = State.InFormElement;
break;
default:
isHoldingOutput = false;
break;
}
if (isHoldingOutput)
{
e.IsHoldingOutput = true;
}
break;
case State.InFormElement:
string value;
switch (e.NodeType)
{
case XmlNodeType.EndElement:
if (String.Compare(e.Name, "form", StringComparison.OrdinalIgnoreCase) == 0)
{
value = e.Value;
e.ValueBuilder.Length = 0;
if (_viewState.Count > 0)
{
// Setting display:none because the div will under some circumstances
// take up place in IE6 even though it shouldn't.
e.ValueBuilder.Append("<div style=\"display:none\">");
foreach (Dictionary <string, AttributeValue> viewState in _viewState)
{
AppendInputElement(e.ValueBuilder, viewState, e.IsEmptyElement);
}
e.ValueBuilder.Append("</div>");
}
_inputAttributes.Clear();
_viewState.Clear();
e.ValueBuilder.Append(_scripts);
_scripts.Length = 0;
e.ValueBuilder.Append(value);
_state = State.SkipToEnd;
}
break;
}
break;
case State.SkipToEnd:
break;
}
}
/// <summary>
/// Handle rewrite value
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// The value event is raised after an associated name event. Check the e.NodeType and other properties to determine
/// course of action.
/// </remarks>
private void HtmlRewriteValueEventHandler(object sender, HtmlRewriteEventArgs e)
{
// Remove all insignificant whitespace
if (_enableWhitespaceRemoval && e.NodeType == XmlNodeType.Whitespace)
{
e.ValueBuilder.Length = 0;
e.ValueBuilder.Append(" ");
return;
}
switch (_state)
{
// We're buffering the contents of input element attributes, while checking for if it is a ViewState field
case State.BufferingInput:
switch (e.NodeType)
{
// Another attribute, add it to the collection and check if it's a ViewState
case XmlNodeType.Attribute:
_inputAttributes.Add(e.Name, new AttributeValue(e.Value, e.QuoteChar));
_viewStateFound |= String.Compare(e.Name, "name", StringComparison.OrdinalIgnoreCase) == 0 && e.Value.StartsWith("__VIEWSTATE");
e.IsHoldingOutput = true;
break;
// End of the input element start tag. Determine if we're to output and continue waiting, or if it's the ViewState,
// in which case we switch state, and output nothing here.
case XmlNodeType.Element:
if (_viewStateFound && e.IsEmptyElement)
{
e.IsHoldingOutput = true;
_viewState.Add(_inputAttributes);
_inputAttributes = new Dictionary<string, AttributeValue>();
_state = State.InFormElement;
}
else
{
e.ValueBuilder.Length = 0;
AppendInputElement(e.ValueBuilder, _inputAttributes, e.IsEmptyElement);
_inputAttributes.Clear();
_state = State.InFormElement;
}
_viewStateFound = false;
break;
}
break;
case State.BufferingScript:
bool isHoldingOutput = true;
switch (e.NodeType)
{
case XmlNodeType.Attribute:
_scripts.AppendFormat(" {0}={2}{1}{2}", e.Name, HttpUtility.HtmlAttributeEncode(e.Value), e.QuoteChar);
break;
case XmlNodeType.Comment:
case XmlNodeType.SignificantWhitespace:
case XmlNodeType.Text:
case XmlNodeType.CDATA:
_scripts.Append(e.Value);
break;
case XmlNodeType.Element:
_scripts.Append(e.Value);
if (e.IsEmptyElement)
{
_state = State.InFormElement;
}
break;
case XmlNodeType.EndElement:
_scripts.Append(e.Value);
_state = State.InFormElement;
break;
default:
isHoldingOutput = false;
break;
}
if (isHoldingOutput)
{
e.IsHoldingOutput = true;
}
break;
case State.InFormElement:
string value;
switch (e.NodeType)
{
case XmlNodeType.EndElement:
if (String.Compare(e.Name, "form", StringComparison.OrdinalIgnoreCase) == 0)
{
value = e.Value;
e.ValueBuilder.Length = 0;
if (_viewState.Count > 0)
{
// Setting display:none because the div will under some circumstances
// take up place in IE6 even though it shouldn't.
e.ValueBuilder.Append("<div style=\"display:none\">");
foreach (Dictionary<string, AttributeValue> viewState in _viewState)
{
AppendInputElement(e.ValueBuilder, viewState, e.IsEmptyElement);
}
e.ValueBuilder.Append("</div>");
}
_inputAttributes.Clear();
_viewState.Clear();
e.ValueBuilder.Append(_scripts);
_scripts.Length = 0;
e.ValueBuilder.Append(value);
_state = State.SkipToEnd;
}
break;
}
break;
case State.SkipToEnd:
break;
}
}
/// <summary>
/// Handle rewrite name
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
/// <remarks>
/// The name event is raised before an associated value event. Check the e.NodeType and other properties to determine
/// course of action.
/// </remarks>
private void HtmlRewriteNameEventHandler(object sender, HtmlRewriteEventArgs e)
{
switch (_state)
{
case State.WaitingForForm:
if (e.NodeType == XmlNodeType.Element && String.Compare(e.Name, "form", StringComparison.OrdinalIgnoreCase) == 0)
{
_state = State.InFormElement;
}
break;
case State.InFormElement:
if (e.NodeType != XmlNodeType.Element)
{
break;
}
if (String.Compare(e.Name, "input", StringComparison.OrdinalIgnoreCase) == 0)
{
_inputAttributes.Clear();
e.IsHoldingOutput = true;
_state = State.BufferingInput;
break;
}
// If we've seen ViewState, we either buffer script, or emit previously buffered script because
// we're not at the end of the form element yet.
if (_viewState.Count > 0)
{
if (String.Compare(e.Name, "script", StringComparison.OrdinalIgnoreCase) == 0)
{
_scripts.Append("<script");
e.IsHoldingOutput = true;
_state = State.BufferingScript;
break;
}
// If we find an element inside the form element and we have scripts buffered, we change our
// mind and output it anyway, since we want to ensure that only the last scripts are output
// after the ViewState (which should be the ones registred as startup script).
if (_scripts.Length > 0)
{
e.ValueBuilder.Length = 0;
e.ValueBuilder.Append(_scripts);
_scripts.Length = 0;
e.ValueBuilder.Append("<").Append(e.Name);
}
}
break;
}
}
/// <summary>
/// Init the HtmlRewrite-engines event handlers. This is called every time a HtmlRewritePipe object
/// is instantiated by the UrlRewriteModule
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EPiServer.Web.HtmlRewriteEventArgs"/> instance containing the event data.</param>
private static void HtmlRewriteToExternal_HtmlRewriteInit(object sender, HtmlRewriteEventArgs e)
{
// We need an instance of ourselves, to keep track of our state
ViewStateMover viewStateMover = new ViewStateMover();
// There are two major events from the HtmlRewrite-engine, which allow us to rewrite
// names and values of the content. The exact definition depends on the XmlNodeType
// that is being processed.
e.RewritePipe.HtmlRewriteName += viewStateMover.HtmlRewriteNameEventHandler;
e.RewritePipe.HtmlRewriteValue += viewStateMover.HtmlRewriteValueEventHandler;
}
private static void HtmlRewriteToExternalHtmlRewriteInit(object sender, HtmlRewriteEventArgs e)
{
e.RewritePipe.HtmlRewriteUrl += RewritePipeHtmlRewriteUrl;
}
