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c# - Microsoft Teams 机器人 - 链接展开身份验证流程

问题描述

找不到用于链接展开的身份验证流程的好示例。我设法使用此示例运行 oauth flow 。但是在用户提供登录名和密码并且机器人OnTeamsAppBasedLinkQueryAsync第二次点击后GetUserTokenAsync仍然返回 null。因此，当身份验证流程完成时，我不知道应该从哪里获取令牌。我应该以某种方式坚持下去吗？Teams 是否会在每次请求时向我发送令牌，或者它应该如何工作？

因此，在我的情况下，以下代码始终返回 null：

var tokenResponse = await (turnContext.Adapter as IUserTokenProvider)
    .GetUserTokenAsync(turnContext, _connectionName, default(string),
        cancellationToken: cancellationToken);

标签： c#botframeworkmicrosoft-teams

解决方案

似乎 'state' 字段不存在于AppBasedLinkQuery. 当身份验证流程完成时，OnTeamsAppBasedLinkQueryAsync将再次调用并且turnContext.Activity.Value将包含 url 和“状态”（或魔术代码）。我们将添加此字段AppBasedLinkQuery（在此处创建问题：microsoft/botbuilder-dotnet#3429）。

一种解决方法是直接从Activity.Value Something中检索状态/魔术代码，例如：

 protected async override Task<MessagingExtensionResponse> OnTeamsAppBasedLinkQueryAsync(ITurnContext<IInvokeActivity> turnContext, AppBasedLinkQuery query, CancellationToken cancellationToken)
        {
            var magicCode = string.Empty;
            var state = (turnContext.Activity.Value as Newtonsoft.Json.Linq.JObject).Value<string>("state");
            if (!string.IsNullOrEmpty(state))
            {
                int parsed = 0;
                if (int.TryParse(state, out parsed))
                {
                    magicCode = parsed.ToString();
                }
            }

            var tokenResponse = await(turnContext.Adapter as IUserTokenProvider).GetUserTokenAsync(turnContext, _connectionName, magicCode, cancellationToken: cancellationToken);
            if (tokenResponse == null || string.IsNullOrEmpty(tokenResponse.Token))
            {
                // There is no token, so the user has not signed in yet.

                // Retrieve the OAuth Sign in Link to use in the MessagingExtensionResult Suggested Actions
                var signInLink = await(turnContext.Adapter as IUserTokenProvider).GetOauthSignInLinkAsync(turnContext, _connectionName, cancellationToken);

                return new MessagingExtensionResponse
                {
                    ComposeExtension = new MessagingExtensionResult
                    {
                        Type = "auth",
                        SuggestedActions = new MessagingExtensionSuggestedAction
                        {
                            Actions = new List<CardAction>
                                {
                                    new CardAction
                                    {
                                        Type = ActionTypes.OpenUrl,
                                        Value = signInLink,
                                        Title = "Bot Service OAuth",
                                    },
                                },
                        },
                    },
                };
            }

            var heroCard = new ThumbnailCard
            {
                Title = "Thumbnail Card",
                Text = query.Url,
                Images = new List<CardImage> { new CardImage("https://raw.githubusercontent.com/microsoft/botframework-sdk/master/icon.png") },
            };

            var attachments = new MessagingExtensionAttachment(HeroCard.ContentType, null, heroCard);
            var result = new MessagingExtensionResult("list", "result", new[] { attachments });

            return new MessagingExtensionResponse(result);
        }

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