public static IHtmlString PreFormattedText(this HtmlHelper self, string text)
        {
            // Encode HTML entities. Important! Security!
            var encodedText = HttpUtility.HtmlEncode(text);

            // Turn HTTP and HTTPS URLs into links.
            // Source: https://stackoverflow.com/a/4750468
            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                @"((http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?)",
                match => $"<a href=\"{match.Value}\" rel=\"nofollow\">{match.Value}</a>",
                RegexOptions.IgnoreCase);

            // Replace new lines with the <br /> tag.
            encodedText = encodedText.Replace("\n", "<br />");

            // Replace more than one space in a row with a space then &nbsp;.
            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                "  +",
                match => " " + string.Join(string.Empty, Enumerable.Repeat("&nbsp;", match.Value.Length - 1)),
                RegexOptions.None);

            return(self.Raw(encodedText));
        }
Пример #2
0
        public static IHtmlString PreFormattedText(this HtmlHelper self, string text, IGalleryConfigurationService configurationService)
        {
            // Encode HTML entities. Important! Security!
            var encodedText = HttpUtility.HtmlEncode(text);

            // Turn HTTP and HTTPS URLs into links.
            // Source: https://stackoverflow.com/a/4750468
            string anchorEvaluator(Match match)
            {
                string trimmedEntityValue = string.Empty;
                string trimmedAnchorValue = match.Value;

                foreach (var trimmedEntity in _trimmedHtmlEntities)
                {
                    if (match.Value.EndsWith(trimmedEntity))
                    {
                        // Remove trailing html entity from anchor URL
                        trimmedAnchorValue = match.Value.Substring(0, match.Value.Length - trimmedEntity.Length);
                        trimmedEntityValue = trimmedEntity;

                        break;
                    }
                }

                if (PackageHelper.TryPrepareUrlForRendering(trimmedAnchorValue, out string formattedUri))
                {
                    string anchorText = formattedUri;
                    string siteRoot   = configurationService.GetSiteRoot(useHttps: true);
                    // Format links to NuGet packages
                    Match packageMatch = RegexEx.MatchWithTimeout(formattedUri, $@"({Regex.Escape(siteRoot)}\/packages\/(?<name>\w+([_.-]\w+)*(\/[0-9a-zA-Z-.]+)?)\/?$)", RegexOptions.IgnoreCase);
                    if (packageMatch != null && packageMatch.Groups["name"].Success)
                    {
                        anchorText = packageMatch.Groups["name"].Value;
                    }

                    return($"<a href=\"{formattedUri}\" rel=\"nofollow\">{anchorText}</a>" + trimmedEntityValue);
                }

                return(match.Value);
            }

            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                @"((http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)",
                anchorEvaluator,
                RegexOptions.IgnoreCase);

            // Replace new lines with the <br /> tag.
            encodedText = encodedText.Replace("\n", "<br />");

            // Replace more than one space in a row with a space then &nbsp;.
            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                "  +",
                match => " " + string.Join(string.Empty, Enumerable.Repeat("&nbsp;", match.Value.Length - 1)),
                RegexOptions.None);

            return(self.Raw(encodedText));
        }
Пример #3
0
        public static IHtmlString PreFormattedText(this HtmlHelper self, string text)
        {
            // Encode HTML entities. Important! Security!
            var encodedText = HttpUtility.HtmlEncode(text);

            // Turn HTTP and HTTPS URLs into links.
            // Source: https://stackoverflow.com/a/4750468
            string anchorEvaluator(Match match)
            {
                string trimmedEntityValue = string.Empty;
                string trimmedAnchorValue = match.Value;

                foreach (var trimmedEntity in _trimmedHtmlEntities)
                {
                    if (match.Value.EndsWith(trimmedEntity))
                    {
                        // Remove trailing html entity from anchor URL
                        trimmedAnchorValue = match.Value.Substring(0, match.Value.Length - trimmedEntity.Length);
                        trimmedEntityValue = trimmedEntity;

                        break;
                    }
                }

                if (PackageHelper.TryPrepareUrlForRendering(trimmedAnchorValue, out string formattedUri))
                {
                    return($"<a href=\"{formattedUri}\" rel=\"nofollow\">{formattedUri}</a>" + trimmedEntityValue);
                }

                return(match.Value);
            }

            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                @"((http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)",
                anchorEvaluator,
                RegexOptions.IgnoreCase);

            // Replace new lines with the <br /> tag.
            encodedText = encodedText.Replace("\n", "<br />");

            // Replace more than one space in a row with a space then &nbsp;.
            encodedText = RegexEx.TryReplaceWithTimeout(
                encodedText,
                "  +",
                match => " " + string.Join(string.Empty, Enumerable.Repeat("&nbsp;", match.Value.Length - 1)),
                RegexOptions.None);

            return(self.Raw(encodedText));
        }
Пример #4
0
        public static IHtmlString PreFormattedText(this HtmlHelper self, string text, IGalleryConfigurationService configurationService)
        {
            void appendText(StringBuilder builder, string inputText)
            {
                var encodedText = HttpUtility.HtmlEncode(inputText);

                // Replace new lines with the <br /> tag.
                encodedText = encodedText.Replace("\n", "<br />");

                // Replace more than one space in a row with a space then &nbsp;.
                encodedText = RegexEx.TryReplaceWithTimeout(
                    encodedText,
                    "  +",
                    match => " " + string.Join(string.Empty, Enumerable.Repeat("&nbsp;", match.Value.Length - 1)),
                    RegexOptions.None);

                builder.Append(encodedText);
            }

            void appendUrl(StringBuilder builder, string inputText)
            {
                string trimmedEntityValue = string.Empty;
                string trimmedAnchorValue = inputText;

                foreach (var trimmedEntity in _trimmedHtmlEntities)
                {
                    if (inputText.EndsWith(trimmedEntity))
                    {
                        // Remove trailing html entity from anchor URL
                        trimmedAnchorValue = inputText.Substring(0, inputText.Length - trimmedEntity.Length);
                        trimmedEntityValue = trimmedEntity;

                        break;
                    }
                }

                if (PackageHelper.TryPrepareUrlForRendering(trimmedAnchorValue, out string formattedUri))
                {
                    string anchorText = formattedUri;
                    string siteRoot   = configurationService.GetSiteRoot(useHttps: true);

                    // Format links to NuGet packages
                    Match packageMatch = RegexEx.MatchWithTimeout(
                        formattedUri,
                        $@"({Regex.Escape(siteRoot)}\/packages\/(?<name>\w+([_.-]\w+)*(\/[0-9a-zA-Z-.]+)?)\/?$)",
                        RegexOptions.IgnoreCase);
                    if (packageMatch != null && packageMatch.Groups["name"].Success)
                    {
                        anchorText = packageMatch.Groups["name"].Value;
                    }

                    builder.AppendFormat(
                        "<a href=\"{0}\" rel=\"nofollow\">{1}</a>{2}",
                        HttpUtility.HtmlEncode(formattedUri),
                        HttpUtility.HtmlEncode(anchorText),
                        HttpUtility.HtmlEncode(trimmedEntityValue));
                }
                else
                {
                    builder.Append(HttpUtility.HtmlEncode(inputText));
                }
            }

            // Turn HTTP and HTTPS URLs into links.
            // Source: https://stackoverflow.com/a/4750468
            var matches = RegexEx.MatchesWithTimeout(
                text,
                @"((http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)",
                RegexOptions.IgnoreCase);

            var output       = new StringBuilder(text.Length);
            var currentIndex = 0;

            if (matches != null && matches.Count > 0)
            {
                foreach (Match match in matches)
                {
                    // Encode the text literal before the URL, if any.
                    var literalLength = match.Index - currentIndex;
                    if (literalLength > 0)
                    {
                        var literal = text.Substring(currentIndex, literalLength);
                        appendText(output, literal);
                    }

                    // Encode the URL.
                    var url = match.Value;
                    appendUrl(output, url);

                    currentIndex = match.Index + match.Length;
                }
            }

            // Encode the text literal appearing after the last URL, if any.
            if (currentIndex < text.Length)
            {
                var literal = text.Substring(currentIndex, text.Length - currentIndex);
                appendText(output, literal);
            }

            return(self.Raw(output.ToString()));
        }