无法通过团队外发webhook将附件(图像等)发送到Send服务

Question

我在团队中使用一个外发的webhook来发送文本以及附件/图像到自定义的well服务。我正在获取get服务中的文本消息数据，但当从团队发送时，我无法获取图像数据或任何附件(外发webhook)

是否支持？如果没有任何解决方法？

Answer 1

实际的卡片JSON附件不会发送到webhook。这类似于bot场景。

对于图像，如果用户附加了一个图像，它将被Bot后端解析并转换为img标签，这应该在内容中作为HTML在一个附件对象中可用。图像本身存储在AMS (团队后端存储)中，源URL也将表示AMS URL，而不是原始URL。用户发送的示例图片：

img height=\"142\" src=\"https://us-api.asm.skype.com/v1/objects/0-eus-d1-abe032166f0b806fe9cb17411e42678f/views/imgo\" width=\"336\" id=\"x_0-eus-d1-abe032166f0b806fe9cb17411e42678f\" itemscope=\"\" itemtype=\"http://schema.skype.com/AMSImage\" style=\"vertical-align:bottom; width:336px; height:142px\">

您应该能够使用MicrosoftAppCredential下载该映像。示例代码：

using (HttpClient httpClient = new HttpClient())
            {
                // MS Teams attachment URLs are secured by a JwtToken, so we need to pass the token from our bot.
                var token = await new MicrosoftAppCredentials("id", "password").GetTokenAsync();
                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
                var responseMessage = await httpClient.GetAsync(imageUrl);
                var contentLenghtBytes = responseMessage.Content.Headers.ContentLength;
                // You could not use this response message to fetch the image for further processing.

                if (responseMessage.StatusCode == System.Net.HttpStatusCode.Accepted)
                {
                    Stream attachmentStream = await responseMessage.Content.ReadAsStreamAsync();
                    attachmentStream.Position = 0;
                    System.Drawing.Image image = System.Drawing.Image.FromStream(attachmentStream);
                    image.Save(@"ImageFromUser.png");
                }
            }