如何将"&安培; login_hint=[e-mail]"到GoogleWebAuthorizationBroker [英] How to append "&login_hint=[e-mail]" to GoogleWebAuthorizationBroker

问题描述

我要的login_hint追加到认证请求给谷歌。
我用下面的代码：

I want to append the login_hint to an authentication request to Google. I'm using the following code:

FileDataStore fDS = new FileDataStore(Logger.Folder, true);
GoogleClientSecrets clientSecrets = GoogleClientSecrets.Load(stream);
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                                clientSecrets.Secrets,
                                scopes.ToArray(),
                                username,
                                CancellationToken.None,
                                fDS).
                                Result;
var initializer = new Google.Apis.Services.BaseClientService.Initializer();
initializer.HttpClientInitializer = credential;

我在哪里可以通过此参数，以便邮件地址被附加在浏览器中打开过吗？

Where do I pass this parameter so the mail address is appended before the browser opens?

推荐答案

感谢由Zhaph的提示

thanks for the hints by Zhaph!

我的解决办法为止！

using Google.Apis.Auth.OAuth2;
using Google.Apis.Auth.OAuth2.Flows;
using Google.Apis.Auth.OAuth2.Requests;
using Google.Apis.Util.Store;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace MyOAuth2
{
    //own implementation to append login_hint parameter to uri

    public class MyOAuth2WebAuthorizationBroker : GoogleWebAuthorizationBroker
    {
        public new static async Task<UserCredential> AuthorizeAsync(ClientSecrets clientSecrets,
            IEnumerable<string> scopes, string user, CancellationToken taskCancellationToken,
            IDataStore dataStore = null)
        {
            var initializer = new GoogleAuthorizationCodeFlow.Initializer
            {
                ClientSecrets = clientSecrets,
            };
            return await AuthorizeAsyncCore(initializer, scopes, user, taskCancellationToken, dataStore)
                .ConfigureAwait(false);
        }

        private static async Task<UserCredential> AuthorizeAsyncCore(
            GoogleAuthorizationCodeFlow.Initializer initializer, IEnumerable<string> scopes, string user,
            CancellationToken taskCancellationToken, IDataStore dataStore = null)
        {
            initializer.Scopes = scopes;
            initializer.DataStore = dataStore ?? new FileDataStore(Folder);
            var flow = new MyAuthorizationCodeFlow(initializer, user);

            // Create an authorization code installed app instance and authorize the user.
            return await new AuthorizationCodeInstalledApp(flow, new LocalServerCodeReceiver()).AuthorizeAsync
                (user, taskCancellationToken).ConfigureAwait(false);
        }
    }

    public class MyAuthorizationCodeFlow : GoogleAuthorizationCodeFlow
    {
        private readonly string userId;

        /// <summary>Constructs a new Google authorization code flow.</summary>
        public MyAuthorizationCodeFlow(Initializer initializer, string userId)
            : base(initializer)
        {
            this.userId = userId;
        }

        public override AuthorizationCodeRequestUrl CreateAuthorizationCodeRequest(string redirectUri)
        {
            return new GoogleAuthorizationCodeRequestUrl(new Uri(AuthorizationServerUrl))
            {
                ClientId = ClientSecrets.ClientId,
                Scope = string.Join(" ", Scopes),
                //append user to url
                LoginHint = userId,
                RedirectUri = redirectUri
            };
        }
    }
}

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