基于Bot Framework+Graph API的视频通话及屏幕共享问题排查

我正在开发一款可发起两人通话的机器人，当前已实现User A与User B的通话发起功能：机器人初始化通话后加入会话，两位用户会收到Bot_Name的来电提醒，双方接听后可通过机器人发起的通话连接。

双方加入通话后，参与者列表中无主持人，User A和User B均无法开启视频或屏幕共享；若User A接听时选择视频通话，其视频仅对User B可见，User B的视频无法被A看到，且屏幕共享始终不可用。

代码/函数 #

参考微软文档「Create service based VoIP calls」实现如下代码：

async makeCall(data) {
    let targetMembers: callTarget[] = [
        {
            '@odata.type': '#microsoft.graph.invitationParticipantInfo',
            identity: {
                '@odata.type': '#microsoft.graph.identitySet',
                user: {
                    '@odata.type': '#microsoft.graph.identity',
                    displayName: data.userA.name,
                    id: data.userA.aadObjectId,
                    tenantId: data.userA.tenantId
                }
            }
        },
        {
            '@odata.type': '#microsoft.graph.invitationParticipantInfo',
            identity: {
                '@odata.type': '#microsoft.graph.identitySet',
                user: {
                    '@odata.type': '#microsoft.graph.identity',
                    displayName: data.userB.name,
                    id: data.userB.aadObjectId,
                    tenantId: data.userB.tenantId
                }
            }
        }

    ]

    const call = {
        '@odata.type': '#microsoft.graph.call',
        direction: 'outgoing',
        subject: data.topic,
        callbackUri: config.callBackUri + "/call-callback",
        source: {
            '@odata.type': '#microsoft.graph.participantInfo',
            identity: {
                '@odata.type': '#microsoft.graph.identitySet',
                application: {
                    '@odata.type': '#microsoft.graph.identity',
                    displayName: 'App for Teams',
                    id: 'xxxxxx-xxxx-xxxx-xxxx-botIdxxxxb23'
                }
            }
        },
        targets: targetMembers,
        requestedModalities: ['audio', 'video', 'videoBasedScreenSharing'],
        mediaConfig: {
            '@odata.type': '#microsoft.graph.serviceHostedMediaConfig',
            removeFromDefaultAudioGroup: false
        },
        tenantId: 'xxxxxx-xxxx-xxxx-xxxx-xxxxxtenentId'
    };

    try {
        const response = await this.graphClient.api('/communications/calls').post(call);
    } catch (error) {
        console.log(error);
    }
}

通过上述方法可成功初始化通话，但视频和屏幕共享功能存在异常。

• 在requested modalities和active modalities中添加 ['audio', 'video', 'videoBasedScreenSharing']
• 将用户设为共同组织者
• 实现调用changeScreenSharingRole接口的函数（参考相关文档）

async enableSharing(callId) {
    const changeScreenSharingRole = {
        role: 'sharer'
      };
      
    try {
        const response = await this.graphClient.api(`/communications/calls/${callId}/changeScreenSharingRole`).post(changeScreenSharingRole);
        console.log(response);

    } catch (error) {
        console.log(error); // Handle any errors that occur during the API call
    }
}

调用该函数时触发500错误（代码9999），错误信息如下：

GraphError: Encountered exception during changing screen sharing role.
    at new GraphError (E:\CallngBot\Deployment\CallngBot\bot\node_modules\@microsoft\microsoft-graph-client\src\GraphError.ts:63:3)
    at Function.GraphErrorHandler.constructErrorFromResponse (E:\CallngBot\Deployment\CallngBot\bot\node_modules\@microsoft\microsoft-graph-client\src\GraphErrorHandler.ts:77:18)
    at Function.<anonymous> (E:\CallngBot\Deployment\CallngBot\bot\node_modules\@microsoft\microsoft-graph-client\src\GraphErrorHandler.ts:104:31)
    at step (E:\CallngBot\Deployment\CallngBot\bot\node_modules\tslib\tslib.js:193:27)
    at Object.next (E:\CallngBot\Deployment\CallngBot\bot\node_modules\tslib\tslib.js:174:57)
    at E:\CallngBot\Deployment\CallngBot\bot\node_modules\tslib\tslib.js:167:75
    at new Promise (<anonymous>)
    at Object.__awaiter (E:\CallngBot\Deployment\CallngBot\bot\node_modules\tslib\tslib.js:163:16)
    at Function.GraphErrorHandler.getError (E:\CallngBot\Deployment\CallngBot\bot\node_modules\@microsoft\microsoft-graph-client\lib\src\GraphErrorHandler.js:87:24)
    at GraphRequest.<anonymous> (E:\CallngBot\Deployment\CallngBot\bot\node_modules\@microsoft\microsoft-graph-client\src\GraphRequest.ts:391:55) {
  statusCode: 500,
  code: '9999',
  requestId: 'dee2344b-6341-439d-bd04-8b2a7dc1e795',
  date: 2023-07-31T21:39:01.000Z,
  body: '{"code":"9999","message":"Encountered exception during changing screen sharing role.","innerError":{"date":"2023-08-01T03:09:01","request-id":"dee2344b-6341-439d-bd04-8b2a7dc1e795","client-request-id":"7a5551fc-6fed-3d1e-5ddf-361c327dca5b"}}',
  headers: Headers {
    [Symbol(map)]: [Object: null prototype] {
      'transfer-encoding': [Array],
      'content-type': [Array],
      'content-encoding': [Array],
      vary: [Array],
      'strict-transport-security': [Array],
      'request-id': [Array],
      'client-request-id': [Array],
      'x-ms-ags-diagnostic': [Array],
      date: [Array],
      connection: [Array]
    }
  }
}

• 如何正确创建service-based VoIP通话？若文档存在问题，请给出修改建议
• 如何在应用创建的通话中启用屏幕共享？
• 如何让机器人支持跨租户使用？是否需将tenantId改为common？（跨租户指Org A开发的应用可被Org B使用）
• 文档缺少后续启用共享和摄像头的参数说明，请提供修改后的函数或补充参数
• 更新：调整参数后通话在移动端/桌面端正常，但浏览器端仅闪过后消失，如同未接来电，求解决方案

内容的提问来源于stack exchange，提问作者IAM5K