/// <summary>
/// Tries to resolve the given <paramref name="url"/> value relative to the application's 'webroot' setting.
/// </summary>
/// <param name="url">The URL to resolve.</param>
/// <param name="resolvedUrl">
/// Absolute URL beginning with the application's virtual root. <c>null</c> if <paramref name="url"/> could
/// not be resolved.
/// </param>
/// <returns><c>true</c> if the <paramref name="url"/> could be resolved; <c>false</c> otherwise.</returns>
protected bool TryResolveUrl(string url, out IHtmlContent resolvedUrl)
{
resolvedUrl = null;
var start = FindRelativeStart(url);
if (start == -1)
{
return(false);
}
url = url.Remove(start, 2).Insert(start, $"~/themes/{Theme.Key}/");
var trimmedUrl = CreateTrimmedString(url, start);
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
var appRelativeUrl = urlHelper.Content(trimmedUrl);
var postTildeSlashUrlValue = trimmedUrl.Substring(2);
if (!appRelativeUrl.EndsWith(postTildeSlashUrlValue, StringComparison.Ordinal))
{
throw new InvalidOperationException("");
}
resolvedUrl = new EncodeFirstSegmentContent(
appRelativeUrl,
appRelativeUrl.Length - postTildeSlashUrlValue.Length,
postTildeSlashUrlValue);
return(true);
}
/// <summary>
/// Tries to resolve the given <paramref name="url"/> value relative to the application's 'webroot' setting.
/// </summary>
/// <param name="url">The URL to resolve.</param>
/// <param name="resolvedUrl">
/// Absolute URL beginning with the application's virtual root. <c>null</c> if <paramref name="url"/> could
/// not be resolved.
/// </param>
/// <returns><c>true</c> if the <paramref name="url"/> could be resolved; <c>false</c> otherwise.</returns>
protected bool TryResolveUrl(string url, out IHtmlContent resolvedUrl)
{
resolvedUrl = null;
var start = FindRelativeStart(url);
if (start == -1)
{
return(false);
}
var trimmedUrl = CreateTrimmedString(url, start);
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
var appRelativeUrl = urlHelper.Content(trimmedUrl);
var postTildeSlashUrlValue = trimmedUrl.Substring(2);
if (!appRelativeUrl.EndsWith(postTildeSlashUrlValue, StringComparison.Ordinal))
{
throw new InvalidOperationException(
Resources.FormatCouldNotResolveApplicationRelativeUrl_TagHelper(
url,
nameof(IUrlHelper),
nameof(IUrlHelper.Content),
"removeTagHelper",
typeof(UrlResolutionTagHelper).FullName,
typeof(UrlResolutionTagHelper).GetTypeInfo().Assembly.GetName().Name));
}
resolvedUrl = new EncodeFirstSegmentContent(
appRelativeUrl,
appRelativeUrl.Length - postTildeSlashUrlValue.Length,
postTildeSlashUrlValue);
return(true);
}
/// <summary>
/// Tries to resolve the given <paramref name="url"/> value relative to the application's 'webroot' setting.
/// </summary>
/// <param name="url">The URL to resolve.</param>
/// <param name="resolvedUrl">
/// Absolute URL beginning with the application's virtual root. <c>null</c> if <paramref name="url"/> could
/// not be resolved.
/// </param>
/// <returns><c>true</c> if the <paramref name="url"/> could be resolved; <c>false</c> otherwise.</returns>
protected bool TryResolveUrl(string url, out IHtmlContent resolvedUrl)
{
resolvedUrl = null;
if (url == null)
{
return(false);
}
var trimmedUrl = url.Trim(ValidAttributeWhitespaceChars);
// Before doing more work, ensure that the URL we're looking at is app-relative.
if (trimmedUrl.Length >= 2 && trimmedUrl[0] == '~' && trimmedUrl[1] == '/')
{
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
var appRelativeUrl = urlHelper.Content(trimmedUrl);
var postTildeSlashUrlValue = trimmedUrl.Substring(2);
if (!appRelativeUrl.EndsWith(postTildeSlashUrlValue, StringComparison.Ordinal))
{
throw new InvalidOperationException(
Resources.FormatCouldNotResolveApplicationRelativeUrl_TagHelper(
url,
nameof(IUrlHelper),
nameof(IUrlHelper.Content),
"removeTagHelper",
typeof(UrlResolutionTagHelper).FullName,
typeof(UrlResolutionTagHelper).GetTypeInfo().Assembly.GetName().Name));
}
resolvedUrl = new EncodeFirstSegmentContent(
appRelativeUrl,
appRelativeUrl.Length - postTildeSlashUrlValue.Length,
postTildeSlashUrlValue);
return(true);
}
return(false);
}
/// <summary>
/// Tries to resolve the given <paramref name="url"/> value relative to the application's 'webroot' setting.
/// </summary>
/// <param name="url">The URL to resolve.</param>
/// <param name="resolvedUrl">
/// Absolute URL beginning with the application's virtual root. <c>null</c> if <paramref name="url"/> could
/// not be resolved.
/// </param>
/// <returns><c>true</c> if the <paramref name="url"/> could be resolved; <c>false</c> otherwise.</returns>
protected bool TryResolveUrl(string url, out IHtmlContent resolvedUrl)
{
resolvedUrl = null;
var start = FindRelativeStart(url);
if (start == -1)
{
return false;
}
var trimmedUrl = CreateTrimmedString(url, start);
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
var appRelativeUrl = urlHelper.Content(trimmedUrl);
var postTildeSlashUrlValue = trimmedUrl.Substring(2);
if (!appRelativeUrl.EndsWith(postTildeSlashUrlValue, StringComparison.Ordinal))
{
throw new InvalidOperationException(
Resources.FormatCouldNotResolveApplicationRelativeUrl_TagHelper(
url,
nameof(IUrlHelper),
nameof(IUrlHelper.Content),
"removeTagHelper",
typeof(UrlResolutionTagHelper).FullName,
typeof(UrlResolutionTagHelper).GetTypeInfo().Assembly.GetName().Name));
}
resolvedUrl = new EncodeFirstSegmentContent(
appRelativeUrl,
appRelativeUrl.Length - postTildeSlashUrlValue.Length,
postTildeSlashUrlValue);
return true;
}
/// <summary>
/// Tries to resolve the given <paramref name="url"/> value relative to the application's 'webroot' setting.
/// </summary>
/// <param name="url">The URL to resolve.</param>
/// <param name="resolvedUrl">
/// Absolute URL beginning with the application's virtual root. <c>null</c> if <paramref name="url"/> could
/// not be resolved.
/// </param>
/// <returns><c>true</c> if the <paramref name="url"/> could be resolved; <c>false</c> otherwise.</returns>
protected bool TryResolveUrl(string url, out IHtmlContent resolvedUrl)
{
resolvedUrl = null;
if (url == null)
{
return false;
}
var trimmedUrl = url.Trim(ValidAttributeWhitespaceChars);
// Before doing more work, ensure that the URL we're looking at is app-relative.
if (trimmedUrl.Length >= 2 && trimmedUrl[0] == '~' && trimmedUrl[1] == '/')
{
var urlHelper = UrlHelperFactory.GetUrlHelper(ViewContext);
var appRelativeUrl = urlHelper.Content(trimmedUrl);
var postTildeSlashUrlValue = trimmedUrl.Substring(2);
if (!appRelativeUrl.EndsWith(postTildeSlashUrlValue, StringComparison.Ordinal))
{
throw new InvalidOperationException(
Resources.FormatCouldNotResolveApplicationRelativeUrl_TagHelper(
url,
nameof(IUrlHelper),
nameof(IUrlHelper.Content),
"removeTagHelper",
typeof(UrlResolutionTagHelper).FullName,
typeof(UrlResolutionTagHelper).GetTypeInfo().Assembly.GetName().Name));
}
resolvedUrl = new EncodeFirstSegmentContent(
appRelativeUrl,
appRelativeUrl.Length - postTildeSlashUrlValue.Length,
postTildeSlashUrlValue);
return true;
}
return false;
}
