c# - Microsoft Teams 机器人 - 链接展开身份验证流程

Question

找不到用于链接展开的身份验证流程的良好示例。我设法使用 this example 运行 oauth 流程.但是在用户提供登录名和密码并且机器人第二次点击 OnTeamsAppBasedLinkQueryAsync 之后 GetUserTokenAsync 仍然返回 null。因此，我不遵循身份验证流程完成后应该从哪里获取 token 。我应该以某种方式坚持下去吗？ Teams 会根据每个请求向我发送 token 吗？它应该如何工作？

所以在我的例子中，下面的代码总是返回 null:

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

Answer 1

AppBasedLinkQuery 中似乎没有“状态”字段。身份验证流程完成后，将再次调用 OnTeamsAppBasedLinkQueryAsync，并且 turnContext.Activity.Value 将包含 url 和“状态”(或魔术代码)。我们会将此字段添加到 AppBasedLinkQuery(在此处创建问题:microsoft/botbuilder-dotnet#3429)。

解决方法是直接从 Activity.Value 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);
        }