Authorization EndpointΒΆ

For most cases, the OAuth 2.0 and OpenID Connect authorization endpoint expects a GET request with a number of query string parameters.

While you can use any means of creating URLs with parameters to create the right strings, the RequestUrl class is a simple helper to accomplish this task.

In particular, you can use the CreateAuthorizeUrl extension method to create URLs for the authorize endpoint - it has support the most common parameters:

/// <summary>
/// Creates an authorize URL.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="clientId">The client identifier.</param>
/// <param name="responseType">The response type.</param>
/// <param name="scope">The scope.</param>
/// <param name="redirectUri">The redirect URI.</param>
/// <param name="state">The state.</param>
/// <param name="nonce">The nonce.</param>
/// <param name="loginHint">The login hint.</param>
/// <param name="acrValues">The acr values.</param>
/// <param name="prompt">The prompt.</param>
/// <param name="responseMode">The response mode.</param>
/// <param name="codeChallenge">The code challenge.</param>
/// <param name="codeChallengeMethod">The code challenge method.</param>
/// <param name="display">The display option.</param>
/// <param name="maxAge">The max age.</param>
/// <param name="uiLocales">The ui locales.</param>
/// <param name="idTokenHint">The id_token hint.</param>
/// <param name="extra">Extra parameters.</param>
/// <returns></returns>
public static string CreateAuthorizeUrl(this RequestUrl request,
    string clientId,
    string responseType,
    string scope = null,
    string redirectUri = null,
    string state = null,
    string nonce = null,
    string loginHint = null,
    string acrValues = null,
    string prompt = null,
    string responseMode = null,
    string codeChallenge = null,
    string codeChallengeMethod = null,
    string display = null,
    int? maxAge = null,
    string uiLocales = null,
    string idTokenHint = null,
    object extra = null)
{ ... }


var ru = new RequestUrl("");

var url = ru.CreateAuthorizeUrl(
    clientId: "client",
    responseType: "implicit",
    redirectUri: "",
    nonce: "xyz",
    scope: "openid");


The extra parameter can either be a string dictionary or an arbitrary other type with properties. In both cases the values will be serialized as keys/values.