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AntiForgeryHelper class to read token from request (Asp.Net core)
public class AntiForgeryHelper
public static string ExtractAntiForgeryToken(string htmlResponseText)
if (htmlResponseText == null) throw new ArgumentNullException("htmlResponseText");
System.Text.RegularExpressions.Match match = Regex.Match(htmlResponseText, @"\<input name=""__RequestVerificationToken"" type=""hidden"" value=""([^""]+)"" \/\>");
return match.Success ? match.Groups[1].Captures[0].Value : null;
public static async Task<string> ExtractAntiForgeryToken(HttpResponseMessage response)
string responseAsString = await response.Content.ReadAsStringAsync();
return await Task.FromResult(ExtractAntiForgeryToken(responseAsString));
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