Background We integrated a web app in MS Teams mobile app. In some cases, we need to support users to download files, eg. images, PDFs, not only from URL but also blob resources. The sample have been deployed on https://1434629.playcode.io/ The source code can be reviewed on https://playcode.io/1434629 Actual Behavior Here is the conclusion of behavior under test: platform\handler downloadFileV1 downloadFileV2 IOS Open file in app Open file in app Android Jump to external browser App crashed or no response On IOS, although users can see the file in app, they have no way to download file into local file system. Expected Behavior Download files by an in-app download manager like browser dose that allow users to interact with

@ Aaron - There is not any direct SDK function available to download files in Teams. You can suggest this feature here: Microsoft Teams Community As a workaround, you have to first upload file in Teams and then clicking on 3 dots on that file you have to download that file. Could you please refer below document and sample: https://learn.microsoft.com/en-us/microsoftteams/platform/bots/how-to/bots-filesv4 https://github.com/OfficeDev/Microsoft-Teams-Samples/tree/main/samples/bot-file-upload/csharp

Is there any SDK support to download files in integrated web app of MS Teams mobile app?

Aaron 20

Background

We integrated a web app in MS Teams mobile app. In some cases, we need to support users to download files, eg. images, PDFs, not only from URL but also blob resources.

The sample have been deployed on https://1434629.playcode.io/

The source code can be reviewed on https://playcode.io/1434629

Actual Behavior

Here is the conclusion of behavior under test:

platform\handler	downloadFileV1	downloadFileV2
IOS	Open file in app	Open file in app
Android	Jump to external browser	App crashed or no response

On IOS, although users can see the file in app, they have no way to download file into local file system.

Expected Behavior

Download files by an in-app download manager like browser dose that allow users to interact with

Nivedipa-MSFT 2,806 Reputation points Microsoft Vendor

2023-05-11T06:02:42.15+00:00

@Aaron - Thanks for reporting your issue. Could you please share the code snippets which you have tried for download?
JimmyYang-MSFT 49,186 Reputation points Microsoft Vendor

2023-05-11T09:24:52.59+00:00

@Aaron

Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. Since your question is not in our support scope. I will remove teams tag from your thread. Thanks for your understanding!

Aaron 20

Hi, @Nivedipa-MSFT

Thanks for your response. Here is the code snippets:

function downloadFileV1(url: string, filename: string) {
  const a = document.createElement('a');
  a.setAttribute('href', url);
  a.setAttribute('download', filename);
  document.body.appendChild(a);
  a.dispatchEvent(new MouseEvent('click', { bubbles: false }));
  a.remove();
}

downloadFileV2(url: string, filename: string) {
  const response = await fetch(url);
  const blob = await response.blob();
  return saveBlob(filename, blob);
};

function saveBlob(blob: Blob, filename: string) {
  if (typeof navigator !== 'undefined' && navigator && navigator.msSaveBlob) {
    return navigator.msSaveBlob(blob, filename);
  } else {
    // use npm package: file-saver, https://www.npmjs.com/package/file-saver
    return FileSaver.saveAs(blob, filename);
  }
}

Pls let me know if you have any further questions.

Aaron 20 Reputation points

2023-05-12T08:20:56.3833333+00:00

OK, @JimmyYang-MSFT , I have removed it.
Nivedipa-MSFT 2,806 Reputation points Microsoft Vendor

2023-05-12T12:51:10.26+00:00

@Aaron - Do you have any deployed sample to check?
Aaron 20 Reputation points

2023-05-15T07:26:26.0866667+00:00

Hi, @Nivedipa-MSFT

The sample have been deployed on https://1434629.playcode.io/

The source code can be reviewed on https://playcode.io/1434629

Here is the conclusion of behavior under test:

platform\handler downloadFileV1 downloadFileV2

IOS Open file in app Open file in app

Android Jump to external browser App crashed or no response

On IOS, although users can see the file in app, they have no way to download file into local file system.
Nivedipa-MSFT 2,806 Reputation points Microsoft Vendor

2023-05-18T08:21:11.48+00:00

@Aaron - We have added https://1434629.playcode.io/ this URL in static tab teams application and tested in android 12 but at our end whenever we click on DownloadFileV1 and on DownloadFileV2 button nothing is happenning.
Please refer below video.
https://github.com/MicrosoftDocs/msteams-docs/assets/92150070/0a42a936-ecb5-40c7-9e66-8a7ef4ba754f
Aaron 20 Reputation points

2023-05-19T04:13:58.48+00:00

@Nivedipa-MSFT Thanks for your following up.

The two buttons work well on browsers both on IOS and android.

The Android device I tested is Galary S10+ with android 9, and the recording can be referred:

https://drive.google.com/file/d/17qn266hPYXW9qp0TmC-1wRiaSug-dM6U/view?usp=sharing

In the recording, DownloadFileV1 directs app to external browser. DownloadFileV2 makes the app crashed (sometimes no response).

Seems the original BOM api does not work as expected. I am wondering if there is any SDK I can get to support users to download files well in Teams app.
Aaron 20 Reputation points

2023-05-29T01:43:33.16+00:00

Hi, @Nivedipa-MSFT

Would it be possible to receive an update? Can I help in any way?

Accepted answer

Nivedipa-MSFT 2,806 Reputation points Microsoft Vendor

2023-06-07T11:09:28.4633333+00:00
@Aaron - There is not any direct SDK function available to download files in Teams.
You can suggest this feature here: Microsoft Teams Community

As a workaround, you have to first upload file in Teams and then clicking on 3 dots on that file you have to download that file.
Could you please refer below document and sample:

https://learn.microsoft.com/en-us/microsoftteams/platform/bots/how-to/bots-filesv4

https://github.com/OfficeDev/Microsoft-Teams-Samples/tree/main/samples/bot-file-upload/csharp
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Aaron 20 Reputation points

2023-06-15T02:07:22.4866667+00:00

@Nivedipa-MSFT Got it. Thanks for your help.
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Is there any SDK support to download files in integrated web app of MS Teams mobile app?

Background

Actual Behavior

Expected Behavior

0 additional answers