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[Subtext-commits] SF.net SVN: subtext: [1775] branches/Release1.9/SubtextSolution
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From: <ha...@us...> - 2006-09-26 10:35:29
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Revision: 1775
http://svn.sourceforge.net/subtext/?rev=1775&view=rev
Author: haacked
Date: 2006-09-26 03:35:16 -0700 (Tue, 26 Sep 2006)
Log Message:
-----------
Implemented an InvisibleCaptcha control. Will post a blog entry about it.
Modified Paths:
--------------
branches/Release1.9/SubtextSolution/Subtext.Akismet/AkismetClient.cs
branches/Release1.9/SubtextSolution/Subtext.Akismet/HttpClient.cs
branches/Release1.9/SubtextSolution/Subtext.Framework/CommentFilter.cs
branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.Designer.cs
branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.cs
branches/Release1.9/SubtextSolution/Subtext.Web/UI/Pages/SubTextMasterPage.cs
branches/Release1.9/SubtextSolution/Subtext.Web/Web.config
branches/Release1.9/SubtextSolution/Subtext.Web.Controls/AssemblyInfo.cs
branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Subtext.Web.Controls.csproj
Added Paths:
-----------
branches/Release1.9/SubtextSolution/Subtext.Web.Controls/InvisibleCaptcha.cs
branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Resources/InvisibleCaptcha.js
Modified: branches/Release1.9/SubtextSolution/Subtext.Akismet/AkismetClient.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Akismet/AkismetClient.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Akismet/AkismetClient.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -143,7 +143,12 @@
public bool VerifyApiKey()
{
string parameters = "key=" + HttpUtility.UrlEncode(this.ApiKey) + "&blog=" + HttpUtility.UrlEncode(this.BlogUrl.ToString());
- return String.Equals("valid", this.httpClient.PostRequest(verifyUrl, this.UserAgent, this.Timeout, parameters), StringComparison.InvariantCultureIgnoreCase);
+ string result = this.httpClient.PostRequest(verifyUrl, this.UserAgent, this.Timeout, parameters);
+
+ if (String.IsNullOrEmpty(result))
+ throw new InvalidResponseException("Akismet returned an empty response");
+
+ return String.Equals("valid", result, StringComparison.InvariantCultureIgnoreCase);
}
/// <summary>
@@ -154,9 +159,13 @@
public bool CheckCommentForSpam(IComment comment)
{
string result = SubmitComment(comment, this.checkUrl);
+
+ if (String.IsNullOrEmpty(result))
+ throw new InvalidResponseException("Akismet returned an empty response");
+
if (result != "true" && result != "false")
throw new InvalidResponseException(string.Format("Received the response '{0}' from Akismet. Probably a bad API key.", result));
-
+
return bool.Parse(result);
}
Modified: branches/Release1.9/SubtextSolution/Subtext.Akismet/HttpClient.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Akismet/HttpClient.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Akismet/HttpClient.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -53,8 +53,7 @@
{
responseText = reader.ReadToEnd();
}
- if (String.IsNullOrEmpty(responseText))
- throw new InvalidResponseException("Akismet returned an empty response", response.StatusCode);
+
return responseText;
}
}
Modified: branches/Release1.9/SubtextSolution/Subtext.Framework/CommentFilter.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Framework/CommentFilter.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Framework/CommentFilter.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -77,7 +77,7 @@
feedbackItem.FlaggedAsSpam = true;
feedbackItem.Approved = false;
FeedbackItem.Update(feedbackItem);
- throw new CommentSpamException("Sorry, but your comment has been flagged as spam.");
+ return;
}
}
feedbackItem.Approved = true;
Modified: branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.Designer.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.Designer.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.Designer.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -1,4 +1,5 @@
using System;
+using Subtext.Web.Controls;
namespace Subtext.Web.UI.Controls
{
@@ -13,6 +14,7 @@
protected Subtext.Web.Controls.CompliantButton btnCompliantSubmit;
protected System.Web.UI.WebControls.Label Message;
protected System.Web.UI.WebControls.CheckBox chkRemember;
+ protected InvisibleCaptcha invisibleCaptchaValidator;
protected SubtextCoComment coComment;
}
}
Modified: branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web/UI/Controls/PostComment.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -25,6 +25,7 @@
using Subtext.Framework.Exceptions;
using Subtext.Framework.Text;
using Subtext.Framework.Web;
+using Subtext.Web.Controls;
namespace Subtext.Web.UI.Controls
{
@@ -110,26 +111,26 @@
/// <summary>
/// Called when an approved comment is added.
/// </summary>
- protected virtual void OnCommentAdded()
+ protected virtual void OnCommentApproved(FeedbackItem feedback)
{
+ if (feedback.Approved)
+ {
+ EventHandler<EventArgs> theEvent = this.CommentApproved;
+ if (theEvent != null)
+ theEvent(this, EventArgs.Empty);
+ }
+ }
+
+ private void RemoveCommentControls()
+ {
for (int i = this.Controls.Count - 1; i >= 0; i--)
{
this.Controls.RemoveAt(i);
}
- Message = new Label();
- Message.Text = "Thanks for your comment!";
- Message.CssClass = "success";
- this.Controls.Add(Message);
-
- //TODO: Provide some means to add a new comment. For now they can click the title to refresh the page.
-
- EventHandler<EventArgs> theEvent = CommentPosted;
- if (theEvent != null)
- theEvent(this, EventArgs.Empty);
}
-
- public event EventHandler<EventArgs> CommentPosted;
+ public event EventHandler<EventArgs> CommentApproved;
+
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
@@ -145,15 +146,24 @@
/// </summary>
private void InitializeComponent()
{
+ int btnIndex = 0;
+
if(this.btnSubmit != null)
{
this.btnSubmit.Click += new System.EventHandler(this.btnSubmit_Click);
+ btnIndex = Controls.IndexOf(btnSubmit);
}
if(this.btnCompliantSubmit != null)
{
this.btnCompliantSubmit.Click += new EventHandler(this.btnSubmit_Click);
+ btnIndex = Controls.IndexOf(btnCompliantSubmit);
}
+
+ invisibleCaptchaValidator = new InvisibleCaptcha();
+ invisibleCaptchaValidator.ErrorMessage = "Please enter the answer to the supplied question.";
+
+ Controls.AddAt(btnIndex, invisibleCaptchaValidator);
}
#endregion
@@ -166,23 +176,12 @@
Entry currentEntry = Cacher.GetEntryFromRequest(CacheDuration.Short);
if(IsCommentAllowed(currentEntry))
{
- FeedbackItem feedbackItem = new FeedbackItem(FeedbackType.Comment);
- feedbackItem.Author = tbName.Text;
- if(this.tbEmail != null)
- feedbackItem.Email = tbEmail.Text;
- feedbackItem.SourceUrl = HtmlHelper.CheckForUrl(tbUrl.Text);
- feedbackItem.Body = tbComment.Text;
- feedbackItem.Title = tbTitle.Text;
- feedbackItem.EntryId = currentEntry.Id;
- feedbackItem.IpAddress = HttpHelper.GetUserIpAddress(Context);
-
+ FeedbackItem feedbackItem = CreateFeedbackInstanceFromFormInput(currentEntry);
FeedbackItem.Create(feedbackItem);
+
CommentFilter filter = new CommentFilter(HttpContext.Current.Cache);
filter.DetermineFeedbackApproval(feedbackItem);
- if (feedbackItem.Approved)
- OnCommentAdded();
-
if(chkRemember == null || chkRemember.Checked)
{
HttpCookie user = new HttpCookie("CommentUser");
@@ -193,13 +192,8 @@
user.Expires = DateTime.Now.AddDays(30);
Response.Cookies.Add(user);
}
-
- ResetCommentFields(currentEntry);
-
- if(Config.CurrentBlog.ModerationEnabled)
- {
- Message.Text = "Thank you for your comment. It will be displayed soon.";
- }
+
+ DisplayResultMessage(feedbackItem);
}
}
catch(BaseCommentException exception)
@@ -209,6 +203,46 @@
}
}
+ private void DisplayResultMessage(FeedbackItem feedbackItem)
+ {
+ RemoveCommentControls();
+ Message = new Label();
+
+ if (feedbackItem.Approved)
+ {
+ Message.Text = "Thanks for your comment!";
+ Message.CssClass = "success";
+ this.Controls.Add(Message); //This needs to be here for ajax calls.
+ OnCommentApproved(feedbackItem);
+ return;
+ }
+ else if(feedbackItem.NeedsModeratorApproval)
+ {
+ Message.Text = "Thank you for your comment. It will be displayed soon.";
+ Message.CssClass = "error moderation";
+ }
+ else
+ {
+ this.Message.Text = "Sorry, but your comment was flagged as spam and will be moderated.";
+ this.Message.CssClass = "error";
+ }
+ this.Controls.Add(Message);
+ }
+
+ private FeedbackItem CreateFeedbackInstanceFromFormInput(Entry currentEntry)
+ {
+ FeedbackItem feedbackItem = new FeedbackItem(FeedbackType.Comment);
+ feedbackItem.Author = this.tbName.Text;
+ if(this.tbEmail != null)
+ feedbackItem.Email = this.tbEmail.Text;
+ feedbackItem.SourceUrl = HtmlHelper.CheckForUrl(this.tbUrl.Text);
+ feedbackItem.Body = this.tbComment.Text;
+ feedbackItem.Title = this.tbTitle.Text;
+ feedbackItem.EntryId = currentEntry.Id;
+ feedbackItem.IpAddress = HttpHelper.GetUserIpAddress(Context);
+ return feedbackItem;
+ }
+
private void ResetCommentFields(Entry entry)
{
if (this.tbComment != null)
Modified: branches/Release1.9/SubtextSolution/Subtext.Web/UI/Pages/SubTextMasterPage.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web/UI/Pages/SubTextMasterPage.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web/UI/Pages/SubTextMasterPage.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -91,7 +91,7 @@
else if (controlId.Equals("PostComment.ascx"))
{
postCommentControl = (PostComment)control;
- postCommentControl.CommentPosted += new EventHandler<EventArgs>(postCommentControl_CommentPosted);
+ postCommentControl.CommentApproved += new EventHandler<EventArgs>(postCommentControl_CommentPosted);
apnlCommentsWrapper.Controls.Add(control);
CenterBodyControl.Controls.Add(apnlCommentsWrapper);
}
Modified: branches/Release1.9/SubtextSolution/Subtext.Web/Web.config
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web/Web.config 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web/Web.config 2006-09-26 10:35:16 UTC (rev 1775)
@@ -364,18 +364,18 @@
timeout="60" />
</authentication>
- <httpHandlers>
- <!--
+ <httpHandlers>
+ <!--
Can not see to load asmx like .aspx, since we will grab
all requests later, make sure these are processed by their
default factory
-->
<add verb="*" path="*.asmx" type="System.Web.Services.Protocols.WebServiceHandlerFactory, System.Web.Services, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false"/>
- <add path="WebResource.axd" verb="GET" type="System.Web.Handlers.AssemblyResourceLoader" validate="true"/>
+ <add path="WebResource.axd" verb="GET" type="System.Web.Handlers.AssemblyResourceLoader" validate="true" />
<!-- This is for FTB 3.0 support -->
- <add verb="GET" path="FtbWebResource.axd" type="FreeTextBoxControls.AssemblyResourceHandler, FreeTextBox"/>
+ <add verb="GET" path="FtbWebResource.axd" type="FreeTextBoxControls.AssemblyResourceHandler, FreeTextBox" />
<!--
Since we are grabbing all requests after this,
Modified: branches/Release1.9/SubtextSolution/Subtext.Web.Controls/AssemblyInfo.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web.Controls/AssemblyInfo.cs 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web.Controls/AssemblyInfo.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -17,6 +17,7 @@
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security.Permissions;
+using System.Web.UI;
//
// General Information about an assembly is controlled through the following
@@ -29,4 +30,6 @@
[assembly: ComVisible(false)]
[assembly: CLSCompliant(false)]
-[assembly: SecurityPermission(SecurityAction.RequestMinimum, Execution = true)]
\ No newline at end of file
+[assembly: SecurityPermission(SecurityAction.RequestMinimum, Execution = true)]
+
+[assembly: WebResource("Subtext.Web.Controls.Resources.InvisibleCaptcha.js", "text/javascript")]
\ No newline at end of file
Added: branches/Release1.9/SubtextSolution/Subtext.Web.Controls/InvisibleCaptcha.cs
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web.Controls/InvisibleCaptcha.cs (rev 0)
+++ branches/Release1.9/SubtextSolution/Subtext.Web.Controls/InvisibleCaptcha.cs 2006-09-26 10:35:16 UTC (rev 1775)
@@ -0,0 +1,195 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+using System.Security.Cryptography;
+using System.Text;
+using System.Web.UI;
+using System.Web.UI.WebControls;
+
+namespace Subtext.Web.Controls
+{
+ /// <summary>
+ /// <para>Simple CAPTCHA control that requires the browser to perform a
+ /// simple calculation via javascript to pass.
+ /// </para>
+ /// <para>
+ /// If javascript is not enabled, a form is rendered asking the user to add two random
+ /// small numbers, unless the <see cref="Accessible" /> property is set to false.
+ /// </para>
+ /// </summary>
+ public class InvisibleCaptcha : BaseValidator
+ {
+ Random rnd = new Random();
+ string directions = string.Empty;
+
+ /// <summary>
+ /// Initializes a new instance of the <see cref="InvisibleCaptcha"/> class.
+ /// </summary>
+ public InvisibleCaptcha() : base()
+ {
+ }
+
+ /// <summary>
+ /// Gets or sets a value indicating whether this <see cref="InvisibleCaptcha"/> is accessible
+ /// to non-javascript browsers. If false, then non-javascript browsers will always fail
+ /// validation.
+ /// </summary>
+ /// <value><c>true</c> if accessible; otherwise, <c>false</c>.</value>
+ [Description("Determines whether or not this control will work for non-javascript enabled browsers")]
+ [DefaultValue(true)]
+ [Browsable(true)]
+ [Category("Behavior")]
+ public bool Accessible
+ {
+ get { return (bool)(ViewState["Accessible"] ?? true); }
+ set { ViewState["Accessible"] = value; }
+ }
+
+ /// <summary>
+ /// Sets up a hashed answer.
+ /// </summary>
+ /// <param name="e"></param>
+ protected override void OnInit(EventArgs e)
+ {
+ Page.RegisterRequiresControlState(this);
+
+ Page.ClientScript.RegisterHiddenField(HiddenAnswerFieldName, "");
+ base.OnInit(e);
+ }
+
+ /// <summary>
+ /// Raises the <see cref="E:System.Web.UI.Control.PreRender"></see> event.
+ /// </summary>
+ /// <param name="e">A <see cref="T:System.EventArgs"></see> that contains the event data.</param>
+ protected override void OnPreRender(EventArgs e)
+ {
+ int first = rnd.Next(1, 9);
+ int second = rnd.Next(1, 9);
+
+ directions = string.Format("Please add {0} and {1} and type the answer here: ", first, second);
+ Display = ValidatorDisplay.Dynamic;
+
+ string answer = (first + second).ToString(CultureInfo.InvariantCulture);
+ //A little obsfucation.
+ Page.ClientScript.RegisterHiddenField(HiddenAnswerHashFieldName, Convert.ToBase64String(Encoding.UTF8.GetBytes(answer)));
+
+ Page.ClientScript.RegisterStartupScript(typeof(InvisibleCaptcha), "MakeCaptchaInvisible", string.Format("<script type=\"text/javascript\">\r\nsubtext_invisible_captcha_hideFromJavascriptEnabledBrowsers('{0}');\r\n</script>", this.CaptchaInputClientId));
+
+ Page.ClientScript.RegisterClientScriptInclude("InvisibleCaptcha",
+ Page.ClientScript.GetWebResourceUrl(this.GetType(), "Subtext.Web.Controls.Resources.InvisibleCaptcha.js"));
+
+ Page.ClientScript.RegisterStartupScript(typeof(InvisibleCaptcha), "ComputeCaptchaAnswer", string.Format("<script type=\"text/javascript\">\r\nsubtext_invisible_captcha_setAnswer({0}, {1}, '{2}');\r\n</script>", first, second, this.HiddenAnswerFieldName));
+ base.OnPreRender(e);
+ }
+
+ /// <summary>
+ /// Displays the control on the client.
+ /// </summary>
+ /// <param name="writer">A <see cref="T:System.Web.UI.HtmlTextWriter"></see> that contains the output stream for rendering on the client.</param>
+ protected override void Render(HtmlTextWriter writer)
+ {
+ string answer = Page.Request.Form[HiddenAnswerFieldName];
+ // In an Ajax postback, we don't want to render this if javascript is enabled
+ // because the page won't know to set this span to be invisible.
+ if (Accessible && String.IsNullOrEmpty(answer))
+ {
+ base.Render(writer);
+ writer.AddAttribute("id", CaptchaInputClientId);
+ if (!string.IsNullOrEmpty(CssClass))
+ writer.AddAttribute("class", CssClass);
+ writer.RenderBeginTag("span");
+ writer.Write(directions);
+
+ writer.Write("<input type=\"text\" name=\"{0}\" value=\"\" />", this.VisibleAnswerFieldName);
+
+ writer.RenderEndTag();
+ }
+ }
+
+ /// <summary>Checks the properties of the control for valid values.</summary>
+ /// <returns>true if the control properties are valid; otherwise, false.</returns>
+ protected override bool ControlPropertiesValid()
+ {
+ if (!String.IsNullOrEmpty(ControlToValidate))
+ {
+ CheckControlValidationProperty(ControlToValidate, "ControlToValidate");
+ }
+ return true;
+ }
+
+ string ComputeAnswerHash(string answer)
+ {
+ string saltedAnswer = answer + "_" + SecretCode;
+ Byte[] clearBytes = Encoding.UTF8.GetBytes(saltedAnswer);
+ Byte[] hashedBytes = new MD5CryptoServiceProvider().ComputeHash(clearBytes);
+ return Convert.ToBase64String(hashedBytes);
+ }
+
+ string CaptchaInputClientId
+ {
+ get
+ {
+ return this.ClientID + "_subtext_captcha";
+ }
+ }
+
+ string VisibleAnswerFieldName
+ {
+ get
+ {
+ return ClientID + "_visibleanswer";
+ }
+ }
+
+ string HiddenAnswerFieldName
+ {
+ get
+ {
+ return ClientID + "_answer";
+ }
+ }
+
+ string HiddenAnswerHashFieldName
+ {
+ get
+ {
+ return ClientID + "_answerhash";
+ }
+ }
+
+ string SecretCode
+ {
+ get
+ {
+ if(Page.Cache["SecretCode"] == null)
+ {
+ Page.Cache["SecretCode"] = Guid.NewGuid().ToString();
+ }
+ return (string)Page.Cache["SecretCode"];
+ }
+ }
+
+ ///<summary>
+ ///When overridden in a derived class, this method contains the code to determine whether the value in the input control is valid.
+ ///</summary>
+ ///<returns>
+ ///true if the value in the input control is valid; otherwise, false.
+ ///</returns>
+ ///
+ protected override bool EvaluateIsValid()
+ {
+ string answer = Page.Request.Form[HiddenAnswerFieldName];
+ if(String.IsNullOrEmpty(answer))
+ answer = Page.Request.Form[VisibleAnswerFieldName];
+ string answerHash = ComputeAnswerHash(answer);
+
+ string encodedExpectedAnswer = Page.Request.Form[HiddenAnswerHashFieldName];
+ if (String.IsNullOrEmpty(encodedExpectedAnswer))
+ return false; //Somebody is tampering with the form.
+
+ string actualAnswer = Encoding.UTF8.GetString(Convert.FromBase64String(encodedExpectedAnswer));
+ string expectedAnswerHash = ComputeAnswerHash(actualAnswer);
+ return answerHash == expectedAnswerHash;
+ }
+ }
+}
Added: branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Resources/InvisibleCaptcha.js
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Resources/InvisibleCaptcha.js (rev 0)
+++ branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Resources/InvisibleCaptcha.js 2006-09-26 10:35:16 UTC (rev 1775)
@@ -0,0 +1,17 @@
+function subtext_invisible_captcha_hideFromJavascriptEnabledBrowsers(id)
+{
+ var captcha = document.getElementById(id);
+ if(captcha)
+ {
+ captcha.style.display = 'none';
+ }
+}
+
+function subtext_invisible_captcha_setAnswer(first, second, formInputId)
+{
+ var formInput = document.getElementById(formInputId);
+ if(formInput)
+ {
+ formInput.value = (first + second);
+ }
+}
\ No newline at end of file
Modified: branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Subtext.Web.Controls.csproj
===================================================================
--- branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Subtext.Web.Controls.csproj 2006-09-26 09:08:48 UTC (rev 1774)
+++ branches/Release1.9/SubtextSolution/Subtext.Web.Controls/Subtext.Web.Controls.csproj 2006-09-26 10:35:16 UTC (rev 1775)
@@ -164,6 +164,7 @@
<Compile Include="HelpToolTip.cs">
<SubType>Code</SubType>
</Compile>
+ <Compile Include="InvisibleCaptcha.cs" />
<Compile Include="MasterPage.cs">
<SubType>Code</SubType>
</Compile>
@@ -197,6 +198,9 @@
<EmbeddedResource Include="Resources\CollapsiblePanel.js" />
<EmbeddedResource Include="Resources\ScrollPositionSaver.js" />
</ItemGroup>
+ <ItemGroup>
+ <EmbeddedResource Include="Resources\InvisibleCaptcha.js" />
+ </ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
<PropertyGroup>
<PreBuildEvent>
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