Dateien senden und erhalten

using Microsoft.Teams.Api;
using Microsoft.Teams.Apps;

WebApplicationBuilder builder = WebApplication.CreateSlimBuilder(args);
builder.Services.AddTeamsBotApplication();

WebApplication app = builder.Build();
TeamsBotApplication teams = app.UseTeamsBotApplication();

teams.OnMessage(async (context, cancellationToken) =>
{
    var attachment = context.Activity.Attachments?[0];
    if (attachment != null && attachment.ContentType.Contains("image"))
    {
        // Download the inline image from the content URL.
        var client = new HttpClient();
        var responseMessage = await client.GetAsync(attachment.ContentUrl);

        // Save the inline image to Files directory.
        var filePath = Path.Combine("Files", "ImageFromUser.png");
        using (var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
        {
            await responseMessage.Content.CopyToAsync(fileStream);
        }

        // Create reply with the received image.
        var imageData = Convert.ToBase64String(File.ReadAllBytes(filePath));
        var reply = new MessageActivityInput().WithText(
            $"Attachment of {attachment.ContentType} type and size of {responseMessage.Content.Headers.ContentLength} bytes received.");
        reply.AddAttachment(TeamsAttachment.CreateBuilder()
            .WithContentType("image/png")
            .WithName("ImageFromUser.png")
            .WithContentUrl($"data:image/png;base64,{imageData}")
            .Build());
        await context.SendAsync(reply, cancellationToken);
    }
});

app.Run();

using Microsoft.Teams.Api;
using Microsoft.Teams.Apps;
using Microsoft.Teams.Plugins.AspNetCore.Extensions;

var builder = WebApplication.CreateBuilder(args);
builder.AddTeams();
var app = builder.Build();
var teams = app.UseTeams();

teams.OnMessage(async (context, cancellationToken) =>
{
    var attachment = context.Activity.Attachments?[0];
    if (attachment != null && attachment.ContentType.Contains("image"))
    {
        // Download the inline image from the content URL.
        var client = new HttpClient();
        var responseMessage = await client.GetAsync(attachment.ContentUrl);

        // Save the inline image to Files directory.
        var filePath = Path.Combine("Files", "ImageFromUser.png");
        using (var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
        {
            await responseMessage.Content.CopyToAsync(fileStream);
        }

        // Create reply with the received image.
        var imageData = Convert.ToBase64String(File.ReadAllBytes(filePath));
        var reply = new MessageActivity(
            $"Attachment of {attachment.ContentType} type and size of {responseMessage.Content.Headers.ContentLength} bytes received.");
        reply.AddAttachment(new Attachment
        {
            Name = "ImageFromUser.png",
            ContentType = "image/png",
            ContentUrl = $"data:image/png;base64,{imageData}",
        });
        await context.SendAsync(reply, cancellationToken);
    }
});

app.Run();

import { App } from '@microsoft/teams.apps';
import { MessageActivity } from '@microsoft/teams.api';
import * as fs from 'fs';

const app = new App();

app.on('message', async ({ activity, send }) => {
  const attachment = activity.attachments?.[0];
  if (attachment && attachment.contentType?.includes('image')) {
    // Download the inline image from the content URL.
    const response = await fetch(attachment.contentUrl!);
    const buffer = Buffer.from(await response.arrayBuffer());

    // Save the inline image to Files directory.
    fs.writeFileSync('files/ImageFromUser.png', buffer);

    await send(
      `Attachment of ${attachment.contentType} type and size of ${buffer.length} bytes received.`
    );
  }
});

import httpx
from microsoft_teams.api import Attachment, MessageActivity, MessageActivityInput
from microsoft_teams.apps import ActivityContext, App

app = App()

@app.on_message
async def on_message(context: ActivityContext[MessageActivity]):
    attachment = context.activity.attachments[0] if context.activity.attachments else None
    if attachment and "image" in attachment.content_type:
        # Download the inline image from the content URL.
        async with httpx.AsyncClient() as client:
            response = await client.get(attachment.content_url)
            file_path = "files/ImageFromUser.png"
            with open(file_path, "wb") as f:
                f.write(response.content)

        await context.send(
            f"Attachment of {attachment.content_type} type and size of "
            f"{len(response.content)} bytes received."
        )

async Task SendFileConsentCard(Context<MessageActivity> context, string fileName, string fileId, int fileSize, CancellationToken cancellationToken)
{
    var consentContext = new { filename = fileName, file_id = fileId };

    var fileCard = new FileConsentCard
    {
        Description = "This is the file I want to send you",
        SizeInBytes = fileSize,
        AcceptContext = consentContext,
        DeclineContext = consentContext
    };

    var message = new MessageActivityInput()
        .AddAttachment(TeamsAttachment.CreateBuilder()
            .WithContentType(ContentTypeFileConsent)
            .WithName(fileName)
            .WithContent(fileCard)
            .Build());
    await context.SendAsync(message, cancellationToken);
}

async Task SendFileConsentCard<T>(IContext<T> context, string fileName, string fileId, int fileSize)
    where T : IActivity
{
    var consentContext = new { filename = fileName, file_id = fileId };

    var fileCard = new FileConsentCard
    {
        Description = "This is the file I want to send you",
        SizeInBytes = fileSize,
        AcceptContext = consentContext,
        DeclineContext = consentContext
    };

    var message = new MessageActivity
    {
        Attachments =
        [
            new Attachment
            {
                Content = fileCard,
                ContentType = new ContentType(ContentTypeFileConsent),
                Name = fileName
            }
        ]
    };
    await context.Send(message);
}

async function sendFileConsentCard(context: any, filename: string, fileId: string): Promise<void> {
  const consentContext = { filename: filename, file_id: fileId };
  await context.send({
    type: 'message',
    attachments: [{
      content: {
        description: 'This is the file I want to send you',
        sizeInBytes: pendingUploads.get(fileId)!.length,
        acceptContext: consentContext,
        declineContext: consentContext
      },
      contentType: CONTENT_TYPE_FILE_CONSENT,
      name: filename
    }]
  });
}

async def _send_file_consent_card(ctx: ActivityContext, filename: str, file_id: str) -> None:
    consent_context = {"filename": filename, "file_id": file_id}
    await ctx.send(MessageActivityInput(attachments=[Attachment(
        content=FileConsentCard(
            description="This is the file I want to send you",
            size_in_bytes=len(pending_uploads[file_id]),
            accept_context=consent_context,
            decline_context=consent_context,
        ),
        content_type=CONTENT_TYPE_FILE_CONSENT,
        name=filename,
    )]))

async function handleFileUpload(context: any, uploadInfo: FileUploadInfo, fileId: string): Promise<void> {
  try {
    const content = pendingUploads.get(fileId)!;
    pendingUploads.delete(fileId);
    await uploadToOnedrive(uploadInfo.uploadUrl!, content);
    await context.send({
      type: 'message',
      text: `<b>${uploadInfo.name}</b> has been successfully uploaded.`,
      attachments: [{
        content: {
          uniqueId: uploadInfo.uniqueId,
          fileType: uploadInfo.fileType
        },
        contentType: CONTENT_TYPE_FILE_INFO,
        name: uploadInfo.name,
        contentUrl: uploadInfo.contentUrl
      }]
    });
  } catch (e: any) {
    pendingUploads.delete(fileId);
    console.log(`File upload failed: ${e}`);
  }
}

async function uploadToOnedrive(url: string, content: Buffer): Promise<void> {
  const fileSize = content.length;
  const response = await axios.put(url, content, {
    headers: {
      'Content-Type': 'application/octet-stream',
      'Content-Length': fileSize.toString(),
      'Content-Range': `bytes 0-${fileSize - 1}/${fileSize}`
    }
  });
  if (![200, 201].includes(response.status)) {
    throw new Error(`Upload failed with status ${response.status}`);
  }
}

async def _handle_file_upload(ctx: ActivityContext, upload_info: FileUploadInfo, file_id: str) -> None:
    try:
        content = pending_uploads.pop(file_id)
        await _upload_to_onedrive(upload_info.upload_url, content)
        await ctx.send(MessageActivityInput(
            text=f"<b>{upload_info.name}</b> has been successfully uploaded.",
            attachments=[Attachment(
                content=FileInfoCard(
                    unique_id=upload_info.unique_id,
                    file_type=upload_info.file_type,
                ),
                content_type=CONTENT_TYPE_FILE_INFO,
                name=upload_info.name,
                content_url=upload_info.content_url,
            )],
        ))
    except Exception as e:
        pending_uploads.pop(file_id, None)
        print(f"File upload failed: {e}")

async def _upload_to_onedrive(url: str, content: bytes) -> None:
    file_size = len(content)
    client = Client(ClientOptions(headers={
        "Content-Type": "application/octet-stream",
        "Content-Length": str(file_size),
        "Content-Range": f"bytes 0-{file_size - 1}/{file_size}",
    }))
    response = await client.put(url, content=content)
    if response.status_code not in [200, 201]:
        raise Exception(f"Upload failed with status {response.status_code}")