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Merge pull request #413 from anoadragon453/anoa/bbb_call_button
BigBlueButton: Allow creating meetings from the client
This commit is contained in:
Travis Ralston
GitHub
commit
b97a0f4bc2
@ -91,6 +91,26 @@ dimension:
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# to your own Dimension instance.
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publicUrl: "https://dimension.example.org"
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bigbluebutton:
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# The full base URL of the API of your BigBlueButton instance. The API is
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# used to create and join meetings.
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apiBaseUrl: "https://bbb.example.org/bigbluebutton/api"
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# The "shared secret" of your BigBlueButton instance. This is used to
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# authenticate to the API above.
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sharedSecret: "YourSharedSecretHere"
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# The title for BigBlueButton widgets that are generated by Dimension.
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widgetName: "BigBlueButton Conference"
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# The subtitle for BigBlueButton widgets that are generated by Dimension.
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widgetTitle: "Join the conference"
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# The avatar for BigBlueButton widgets that are generated by Dimension.
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# Usually this doen't need to be changed, however if your homeserver
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# is not able to reach t2bot.io then you should specify your own here.
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widgetAvatarUrl: "mxc://t2bot.io/be1650140620d8bb61a8cf5baeb05f24a734434c"
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# Settings for controlling how logging works
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logging:
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file: logs/dimension.log
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218
docs/bigbluebutton.md
Normal file
218
docs/bigbluebutton.md
Normal file
@ -0,0 +1,218 @@
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# BigBlueButton
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[BigBlueButton](https://bigbluebutton.org/) is open-source video calling software aimed primarily at educators and has
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useful features such as screen and PDF sharing, collaborative document editing, polls and more.
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Dimension supports embedding BigBlueButton meetings into a Matrix room via widgets, and can do so in two ways:
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* [Greenlight](https://docs.bigbluebutton.org/greenlight/gl-overview.html) is a frontend for BigBlueButton meeting
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administration that allows for creating/ending meetings, inviting people via link or email etc. Dimension supports
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taking a Greenlight URL and turning it into a widget in a Matrix room that room occupants can use to join the meeting.
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In this instance, Greenlight is acting as a client of BigBlueButton's server-side API, and Dimension is relying on a
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Greenlight URL to allow Matrix users to join a meeting.
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* Alternatively, Dimension can be configured to connect directly to BigBlueButton and create meetings itself. This does
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require running your own BigBlueButton server which Dimension will need authorization to control. This configuration is
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useful as meetings can be created without needing to leave your Matrix client, as well as sidesteps the need to set up
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Greenlight on your deployment. This method can also be used to allow the 'Video Call' button in Element to start a
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meeting.
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Note that with the first method, Dimension can be given a Greenlight URL pointing to any public instance of
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Greenlight/BigBlueButton. With the second, Dimension will only talk to, and create meetings on, the BigBlueButton server
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it has been configured to talk to.
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## Usage Guide
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### Using a Greenlight URL
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Dimension does not require any extra configuration to allow creating meetings using a Greenlight URL.
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* Open the integration manager window and add a BigBlueButton widget.
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* Enter the URL you received from Greenlight. It should be in the form: `https://bbb.example.com/abc-def-ghi`.
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* Click the 'Add Widget' button.
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Members in the room will see a BigBlueButton widget appear. They can click "Join Conference" inside the widget to join.
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### Have Dimension Create Meetings (with Element's Video Call button)
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Fill out the `bigbluebutton` section of Dimension's config file. Both the `apiBaseUrl` and `sharedSecret` fields must be
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set to the values corresponding to your own BigBlueButton server.
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Element can be configured to ask Dimension to start a meeting without any client-side changes. Simply add the following
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information to the [Client well-known](https://matrix.org/docs/spec/client_server/r0.6.1#get-well-known-matrix-client)
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file of your homeserver:
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```json
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"io.element.call_behaviour": {
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"widget_build_url": "https://dimension.example.com/api/v1/dimension/bigbluebutton/widget_state",
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}
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```
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then close and reopen Element so that it picks up the new behaviour.
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Now pressing the Video Call button in a room with more than two users in it should spawn a BigBlueButton meeting! Note
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that BigBlueButton will automatically end meetings that all users have left (after a minute or two). Thus if all users
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have left a meeting, you will need to recreate the widget in order to spawn a new meeting.
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Created meetings are protected by a generated password that is included in the widget room state event. Thus one will
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only be able to gain access to the meeting if they are in the room, or if someone in the room shares that information
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with them. All users that join will have moderator permissions in the meeting, though this may change in the future to
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allow meeting permissions based of room power level.
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### Troubleshooting
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This code was last tested with the [BigBlueButton v2.3 docker image](https://github.com/bigbluebutton/docker/).
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#### When using a Greenlight URL
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Let us know if you run into any problems!
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#### When having Dimension create meetings
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*My users are seeing 401 Unknown Session errors when trying to join a meeting!*
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BigBlueButton (or at least the [docker image](https://github.com/bigbluebutton/docker)) has a strange bug where
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calling the [`/join`](https://docs.bigbluebutton.org/dev/api.html#join) API ends up failing to verify the session ID
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*which it just passed to you*. There's discussion on the
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issue [here](https://github.com/bigbluebutton/bigbluebutton/issues/6343)
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and [here](https://groups.google.com/forum/#!topic/bigbluebutton-dev/TkjyUZP_gO8), but **TL;DR if you're getting
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invalid session ID errors**, a workaround is to set `allowRequestsWithoutSession=true`
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in `/usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties` (located in the `bbb-docker_bbb-web` container for
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docker deployments).
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*I'm using the BigBlueButton docker image and it's taking about 20-30 seconds for a user to join a meeting. Why is it so slow?*
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This appears to be due to the BigBlueButton nginx container attempting to contact multiple html5-frontend instances, of
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which you may only have configured one or two to start. nginx will wait for every request to timeout before returning
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the result to yours though, hence the long wait. It's possible to edit the nginx configuration inside the containers to
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remove the extra upstream directives and eliminate the timeout. But this is something that really needs to be fixed
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upstream.
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*It sometimes says that my meeting does not exist! Where'd it go?*
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As mentioned above, BigBlueButton server will automatically remove meetings that everyone has left. Unfortunately we don't
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currently have a way to remove the widget when this happens. Someone will permissions in the room will need to recreate
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the widget and thus create a new meeting.
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## Implementation Details
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### When using a Greenlight URL
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See the explanation [here](https://github.com/turt2live/matrix-dimension/blob/70608c2a96a11953e0bf3bf197bb81d852df801d/src/api/dimension/DimensionBigBlueButtonService.ts#L28-L111).
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### When having Dimension create meetings
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Matrix clients can create widgets by sending a widget state event in the room with the appropriate fields. To retrieve
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the necessary content of a state event that embeds a BigBlueButton meeting, clients can
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call `GET /api/v1/dimension/bigbluebutton/widget_state?roomId=!room:domain`
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on Dimension to retrieve the necessary json contents for the state event. An example response may look like:
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```json
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{
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"widget_id": "24faa4cfd11d3b915664b7b393866974517014d43e5e682f8c930ec3fbaac337",
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"widget": {
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"creatorUserId": "@dimension:localhost",
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"id": "24faa4cfd11d3b915664b7b393866974517014d43e5e682f8c930ec3fbaac337",
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"type": "m.custom",
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"waitForIframeLoad": true,
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"name": "BigBlueButton Conference",
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"avatar_url": "mxc://t2bot.io/be1650140620d8bb61a8cf5baeb05f24a734434c",
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"url": "https://dimension.example.com/widgets/bigbluebutton?widgetId=$matrix_widget_id&roomId=$matrix_room_id&createMeeting=true&displayName=$matrix_display_name&avatarUrl=$matrix_avatar_url&userId=$matrix_user_id&meetingId=GsmiDReG&meetingPassword=dvKIv7EX&auth=$openidtoken-jwt",
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"data": {
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"title": "Join the conference"
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}
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},
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"layout": {
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"container": "top",
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"index": 0,
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"width": 65,
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"height": 50
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}
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}
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```
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The contents of the `widget` dict from the response is what should be placed in the `content` of the widget state
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event. An example widget state event generated from the above looks like:
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```json
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{
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"type": "im.vector.modular.widgets",
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"sender": "@admin:localhost",
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"content": {
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"creatorUserId": "@admin:localhost",
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"id": "24faa4cfd11d3b915664b7b393866974517014d43e5e682f8c930ec3fbaac337",
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"type": "m.custom",
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"waitForIframeLoad": true,
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"name": "BigBlueButton Conference",
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"avatar_url": "mxc://t2bot.io/be1650140620d8bb61a8cf5baeb05f24a734434c",
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"url": "https://dimension.example.com/widgets/bigbluebutton?widgetId=$matrix_widget_id&roomId=$matrix_room_id&createMeeting=true&displayName=$matrix_display_name&avatarUrl=$matrix_avatar_url&userId=$matrix_user_id&meetingId=GsmiDReG&meetingPassword=dvKIv7EX&auth=$openidtoken-jwt",
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"data": {
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"title": "Join the conference"
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},
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"roomId": "!ZsCMQAoIIHgOlXMzwX:localhost",
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"eventId": "$2RbnJDUPFIMTDVda_-Z01lyZt30W-bZnw3z7CFIRWKQ"
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},
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"state_key": "24faa4cfd11d3b915664b7b393866974517014d43e5e682f8c930ec3fbaac337",
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"origin_server_ts": 1620386456620,
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"unsigned": {
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"age": 96
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},
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"event_id": "$2RbnJDUPFIMTDVda_-Z01lyZt30W-bZnw3z7CFIRWKQ",
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"room_id": "!ZsCMQAoIIHgOlXMzwX:localhost"
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}
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```
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While servicing the `/widget_state` call, Dimension will create the BigBlueButton meeting by calling the
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[BigBlueButton `/create` API](https://docs.bigbluebutton.org/dev/api.html#create). We get back a meeting ID and two
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passwords from BigBlueButton: one "attendee" and one "moderator" password. We can pass either of these back to the user,
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and it'll be placed in the widget state event in the room. (For now, we just pass back the moderator password). You'll
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notice that it's included in the `url` field as a query parameter. Those query parameters are passed to the widget when
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it loads, which the widget then uses to populate fields when making subsequent calls to Dimension.
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The widget will then use the meetingID, password and some additional user metadata (displayname, userID, avatarURL) to call
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`POST /api/v1/dimension/bigbluebutton/getJoinUrl`. Dimension will craft a URL that the widget can use to call the
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[BigBlueButton `/join` API](https://docs.bigbluebutton.org/dev/api.html#join), and respond with the following:
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```json
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{
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"url": "https://bbb.example.com/bigbluebutton/api/join?meetingID=2QdrCVAl&password=yX2w587M&fullName=bob%20(%40bob%3Aexample.com)&userID=%40bob%3Aexample.com&checksum=fa35ecdf711478423bf5173cb81c5b2e0e9e59bb8779811b614a44645ee94d89"
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}
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```
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That URL is embedded and loaded by the widget - joining the meeting.
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Note that if everyone in the meeting leaves, the meeting will be garbage-collected automatically server-side by BigBlueButton.
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However the widget will still remain in the room. In this case, if users attempt to join the meeting again, they will be
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informed that a new meeting needs to be created. This works by having Dimension check if a meeting is still running in
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`/getJoinUrl`. It does so by using the
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[BigBlueButton `getMeetingInfo` API](https://docs.bigbluebutton.org/dev/api.html#getmeetinginfo) to check that:
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* A current or past meeting actually exists with the provided meeting ID - if not, the following will be returned to the
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widget:
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```json
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{
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"jsonResponse": {
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"error": "This meeting does not exist.",
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"dim_errcode": "UNKNOWN_MEETING_ID",
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"errcode": "UNKNOWN_MEETING_ID"
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},
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"statusCode": 400,
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"errorCode": "UNKNOWN_MEETING_ID"
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}
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```
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* A meeting exists, but has both `running` as `false` and has an `endTime` other than 0. If both of those are true,
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then the meeting existed but is no longer running. In that case, the following will be returned to the widget:
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```json
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{
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"jsonResponse": {
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"error": "This meeting does not exist.",
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"dim_errcode": "MEETING_HAS_ENDED",
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"errcode": "MEETING_HAS_ENDED"
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},
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"statusCode": 400,
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"errorCode": "MEETING_HAS_ENDED"
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}
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```
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Upon receiving either of these, the widget will inform the user with an error message that a new meeting must be created.
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14
package-lock.json
generated
14
package-lock.json
generated
@ -13962,6 +13962,20 @@
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"async-limiter": "~1.0.0"
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}
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},
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"xml2js": {
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"version": "0.4.23",
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"resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.23.tgz",
|
||||
"integrity": "sha512-ySPiMjM0+pLDftHgXY4By0uswI3SPKLDw/i3UXbnO8M/p28zqexCUoPmQFrYD+/1BzhGJSs2i1ERWKJAtiLrug==",
|
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"requires": {
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"sax": ">=0.6.0",
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"xmlbuilder": "~11.0.0"
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}
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},
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"xmlbuilder": {
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"version": "11.0.1",
|
||||
"resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-11.0.1.tgz",
|
||||
"integrity": "sha512-fDlsI/kFEx7gLvbecc0/ohLG50fugQp8ryHzMTuW9vSa1GJ0XYWKnhsUx7oie3G98+r56aTQIUB4kht42R3JvA=="
|
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},
|
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"xtend": {
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"version": "4.0.1",
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"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
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@ -61,7 +61,8 @@
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"typescript-ioc": "^1.2.5",
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"typescript-rest": "^2.2.0",
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"umzug": "^2.2.0",
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"url": "^0.11.0"
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"url": "^0.11.0",
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"xml2js": "^0.4.23"
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},
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"devDependencies": {
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"@angular/animations": "^8.0.3",
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@ -1,11 +1,16 @@
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import { GET, Path, QueryParam } from "typescript-rest";
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import { GET, POST, Path, QueryParam } from "typescript-rest";
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import * as request from "request";
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import { LogService } from "matrix-js-snippets";
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import { URL } from "url";
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import { BigBlueButtonJoinRequest } from "../../models/Widget";
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import { BigBlueButtonJoinResponse } from "../../models/WidgetResponses";
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import { BigBlueButtonGetJoinUrlRequest } from "../../models/Widget";
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import { BigBlueButtonJoinResponse, BigBlueButtonCreateAndJoinMeetingResponse, BigBlueButtonWidgetResponse } from "../../models/WidgetResponses";
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import { AutoWired } from "typescript-ioc/es6";
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import { ApiError } from "../ApiError";
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import { sha256 } from "../../utils/hashing";
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import config from "../../config";
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import { parseStringPromise } from "xml2js";
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import * as randomString from "random-string";
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import { MatrixStickerBot } from "../../matrix/MatrixStickerBot";
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/**
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* API for the BigBlueButton widget.
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@ -21,6 +26,9 @@ export class DimensionBigBlueButtonService {
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private authenticityTokenRegexp = new RegExp(`name="authenticity_token" value="([^"]+)".*`);
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// join handles the request from a client to join a BigBlueButton meeting
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// via a Greenlight URL. Note that this is no longer the only way to join a
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// BigBlueButton meeting. See xxx below for the API that bypasses Greenlight
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// and instead calls the BigBlueButton API directly.
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//
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// The client is expected to send a link created by greenlight, the nice UI
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// that's recommended to be installed on top of BBB, which is itself a BBB
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@ -104,7 +112,6 @@ export class DimensionBigBlueButtonService {
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@GET
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@Path("join")
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public async join(
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joinRequest: BigBlueButtonJoinRequest,
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@QueryParam("greenlightUrl") greenlightURL: string,
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@QueryParam("fullName") fullName: string,
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): Promise<BigBlueButtonJoinResponse|ApiError> {
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@ -114,7 +121,6 @@ export class DimensionBigBlueButtonService {
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LogService.info("BigBlueButton", "URL from client: " + greenlightURL);
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LogService.info("BigBlueButton", "MeetingID: " + greenlightMeetingID);
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LogService.info("BigBlueButton", "Name given from client: " + fullName);
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LogService.info("BigBlueButton", joinRequest);
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// Query the URL the user has given us
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let response = await this.doRequest("GET", greenlightURL);
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@ -163,6 +169,238 @@ export class DimensionBigBlueButtonService {
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return {url: joinUrl};
|
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}
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|
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/**
|
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* Clients can call this endpoint in order to retrieve the contents of the widget room state.
|
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* This endpoint will create a BigBlueButton meeting and place the returned ID and password in the room state.
|
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* @param {string} roomId The ID of the room that the widget will live in.
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*/
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@GET
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@Path("widget_state")
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public async widget(
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@QueryParam("roomId") roomId: string,
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): Promise<BigBlueButtonWidgetResponse|ApiError> {
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// Hash the room ID in order to generate a unique widget ID
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const widgetId = sha256(roomId + "bigbluebutton");
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const widgetName = config.bigbluebutton.widgetName;
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const widgetTitle = config.bigbluebutton.widgetTitle;
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const widgetAvatarUrl = config.bigbluebutton.widgetAvatarUrl;
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LogService.info("BigBlueButton", "Got a meeting create request for room: " + roomId);
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// NOTE: BBB meetings will by default end a minute or two after the last person leaves.
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const createQueryParameters = {
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meetingID: randomString(20),
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// To help admins link meeting IDs to rooms
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meta_MatrixRoomID: roomId,
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};
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// Create a new meeting.
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const createResponse = await this.makeBBBApiCall("GET", "create", createQueryParameters, null);
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LogService.info("BigBlueButton", createResponse);
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// The password users will join with.
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// TODO: We currently give users access to moderate the meeting by returning createResponse.moderatorPW instead
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// of createResponse.attendeePW. The latter lets people join as viewers without any moderator permissions.
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// Allowing this would likely require saving the moderator password for a meeting in Dimension and authenticating
|
||||
// users by room power level when they call getJoinUrl. Unfortunately, doing would either require us to have a
|
||||
// user in the room or have the user be a Synapse server admin (so that they can see room state).
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const meetingPassword = createResponse.moderatorPW[0];
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||||
|
||||
// Retrieve the user ID that dimension is running as
|
||||
const widgetCreatorUserId = await MatrixStickerBot.getUserId();
|
||||
|
||||
// Add all necessary client variables to the url when loading the widget
|
||||
const widgetUrl = config.dimension.publicUrl +
|
||||
"/widgets/bigbluebutton" +
|
||||
"?widgetId=$matrix_widget_id" +
|
||||
"&roomId=$matrix_room_id" +
|
||||
// Indicate that we would like to join a meeting created by Dimension, rather than doing so via
|
||||
// a greenlight URL
|
||||
"&createMeeting=true" +
|
||||
"&displayName=$matrix_display_name" +
|
||||
"&avatarUrl=$matrix_avatar_url" +
|
||||
"&userId=$matrix_user_id" +
|
||||
// Provide the meeting details in the state event
|
||||
`&meetingId=${createResponse.meetingID[0]}` +
|
||||
`&meetingPassword=${meetingPassword}` +
|
||||
"&auth=$openidtoken-jwt";
|
||||
|
||||
return {
|
||||
"widget_id": widgetId,
|
||||
"widget": {
|
||||
"creatorUserId": widgetCreatorUserId,
|
||||
"id": widgetId,
|
||||
"type": "m.custom",
|
||||
"waitForIframeLoad": true,
|
||||
"name": widgetName,
|
||||
"avatar_url": widgetAvatarUrl,
|
||||
"url": widgetUrl,
|
||||
"data": {
|
||||
"title": widgetTitle,
|
||||
}
|
||||
},
|
||||
"layout": {
|
||||
"container": "top",
|
||||
"index": 0,
|
||||
"width": 65,
|
||||
"height": 50,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Clients can call this endpoint in order to retrieve a URL that leads to the BigBlueButton API that they can
|
||||
* use to join the meeting with. They will need to provide the meeting ID and password which are only available
|
||||
* from the widget room state event.
|
||||
* @param {BigBlueButtonGetJoinUrlRequest} getJoinUrlRequest The body of the request.
|
||||
*/
|
||||
@POST
|
||||
@Path("getJoinUrl")
|
||||
public async getJoinUrl(
|
||||
getJoinUrlRequest: BigBlueButtonGetJoinUrlRequest,
|
||||
): Promise<BigBlueButtonCreateAndJoinMeetingResponse|ApiError> {
|
||||
// Check if the meeting exists and is running. If not, return an error for each case
|
||||
let getMeetingInfoParameters = {
|
||||
meetingID: getJoinUrlRequest.meetingId,
|
||||
}
|
||||
|
||||
const getMeetingInfoResponse = await this.makeBBBApiCall("GET", "getMeetingInfo", getMeetingInfoParameters, null);
|
||||
LogService.info("BigBlueButton", getMeetingInfoResponse)
|
||||
if (getMeetingInfoResponse.returncode[0] === "FAILED") {
|
||||
// This meeting does not exist, inform the user
|
||||
return new ApiError(
|
||||
400,
|
||||
{error: "This meeting does not exist."},
|
||||
"UNKNOWN_MEETING_ID",
|
||||
);
|
||||
} else if (getMeetingInfoResponse.running[0] === "false" && getMeetingInfoResponse.endTime[0] !== "0") {
|
||||
// This meeting did exist, but has ended. Inform the user
|
||||
return new ApiError(
|
||||
400,
|
||||
{error: "This meeting has ended."},
|
||||
"MEETING_HAS_ENDED",
|
||||
);
|
||||
}
|
||||
|
||||
// Construct a fullName parameter from the provided user ID and display name (if provided).
|
||||
// It's important to display the user ID so that users cannot impersonate each other.
|
||||
let fullName: string;
|
||||
if (getJoinUrlRequest.displayName) {
|
||||
fullName = `${getJoinUrlRequest.displayName} (${getJoinUrlRequest.userId})`;
|
||||
} else {
|
||||
fullName = getJoinUrlRequest.userId;
|
||||
}
|
||||
|
||||
let joinQueryParameters = {
|
||||
meetingID: getJoinUrlRequest.meetingId,
|
||||
password: getJoinUrlRequest.meetingPassword,
|
||||
fullName: fullName,
|
||||
userID: getJoinUrlRequest.userId,
|
||||
}
|
||||
|
||||
// Add an avatar to the join request if the user provided one
|
||||
if (getJoinUrlRequest.avatarUrl.startsWith("mxc")) {
|
||||
joinQueryParameters["avatarURL"] = this.getHTTPAvatarUrlFromMXCUrl(getJoinUrlRequest.avatarUrl);
|
||||
}
|
||||
|
||||
// Calculate the checksum for the join URL. We need to do so as a browser would as we're passing this back to a browser
|
||||
const checksum = this.bbbChecksumFromCallNameAndQueryParamaters("join", joinQueryParameters, true);
|
||||
|
||||
// Construct the join URL, which we'll give back to the client, who can then add additional parameters to (or we just do it)
|
||||
const url = `${config.bigbluebutton.apiBaseUrl}/join?${this.queryStringFromObject(joinQueryParameters, true)}&checksum=${checksum}`;
|
||||
|
||||
return {
|
||||
url: url,
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Make an API call to the configured BBB server instance.
|
||||
* @param {string} method The HTTP method to use for the request.
|
||||
* @param {string} apiCallName The name of the API (the last bit of the endpoint) to call. e.g 'create', 'join'.
|
||||
* @param {any} queryParameters The query parameters to use in the request.
|
||||
* @param {any} body The body of the request.
|
||||
* @returns {any} The response to the call.
|
||||
*/
|
||||
private async makeBBBApiCall(
|
||||
method: string,
|
||||
apiCallName: string,
|
||||
queryParameters: any,
|
||||
body: any,
|
||||
): Promise<any> {
|
||||
// Compute the checksum needed to authenticate the request (as derived from the configured shared secret)
|
||||
queryParameters.checksum = this.bbbChecksumFromCallNameAndQueryParamaters(apiCallName, queryParameters, false);
|
||||
|
||||
// Get the URL host and path using the configured api base and the API call name
|
||||
const url = `${config.bigbluebutton.apiBaseUrl}/${apiCallName}`;
|
||||
|
||||
// Now make the request!
|
||||
const response = await this.doRequest(method, url, queryParameters, body);
|
||||
|
||||
// Parse and return the XML from the response
|
||||
// TODO: XML parsing error handling
|
||||
const parsedResponse = await parseStringPromise(response.body);
|
||||
|
||||
// Extract the "response" object
|
||||
return parsedResponse.response;
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts an object representing a query string into a checksum suitable for appending to a BBB API call.
|
||||
* Docs: https://docs.bigbluebutton.org/dev/api.html#usage
|
||||
* @param {string} apiCallName The name of the API to call, e.g "create", "join".
|
||||
* @param {any} queryParameters An object representing a set of query parameters represented by keys and values.
|
||||
* @param {boolean} encodeAsBrowser Whether to encode the query string as a browser would.
|
||||
* @returns {string} The checksum for the request.
|
||||
*/
|
||||
private bbbChecksumFromCallNameAndQueryParamaters(apiCallName: string, queryParameters: any, encodeAsBrowser: boolean): string {
|
||||
// Convert the query parameters object into a string
|
||||
// We URL encode each value as a browser would. If we don't, our resulting checksum will not match.
|
||||
const widgetQueryString = this.queryStringFromObject(queryParameters, encodeAsBrowser);
|
||||
|
||||
LogService.info("BigBlueButton", "Built widget string:" + widgetQueryString);
|
||||
LogService.info("BigBlueButton", "Hashing:" + apiCallName + widgetQueryString + config.bigbluebutton.sharedSecret);
|
||||
|
||||
// Hash the api name and query parameters to get the checksum, and add it to the set of query parameters
|
||||
return sha256(apiCallName + widgetQueryString + config.bigbluebutton.sharedSecret);
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts an object containing keys and values as strings into a string representing URL query parameters.
|
||||
* @param queryParameters
|
||||
* @param encodeAsBrowser
|
||||
* @returns {string} The query parameter object as a string.
|
||||
*/
|
||||
private queryStringFromObject(queryParameters: any, encodeAsBrowser: boolean): string {
|
||||
return Object.keys(queryParameters).map(k => k + "=" + this.encodeForUrl(queryParameters[k], encodeAsBrowser)).join("&");
|
||||
}
|
||||
|
||||
/**
|
||||
* Encodes a string in the same fashion browsers do (encoding ! and other characters).
|
||||
* @param {string} text The text to encode.
|
||||
* @param {boolean} encodeAsBrowser Whether to encode the query string as a browser would.
|
||||
* @returns {string} The encoded text.
|
||||
*/
|
||||
private encodeForUrl(text: string, encodeAsBrowser: boolean): string {
|
||||
let encodedText = encodeURIComponent(text);
|
||||
if (!encodeAsBrowser) {
|
||||
// use + instead of %20 for space to match what the 'request' JavaScript library does do.
|
||||
// encodeURIComponent doesn't escape !'()*, so manually escape them.
|
||||
encodedText = encodedText.replace(/%20/g, '+').replace(/[!'()]/g, escape).replace(/\*/g, "%2A");
|
||||
}
|
||||
|
||||
return encodedText;
|
||||
}
|
||||
|
||||
/**
|
||||
* Perform an HTTP request.
|
||||
* @param {string} method The HTTP method to use.
|
||||
* @param {string} url The URL (without query parameters) to request.
|
||||
* @param {string} qs The query parameters to use with the request.
|
||||
* @param {string} body The JSON body of the request
|
||||
* @param {boolean} followRedirect Whether to follow redirect responses automatically.
|
||||
*/
|
||||
private async doRequest(
|
||||
method: string,
|
||||
url: string,
|
||||
@ -180,6 +418,7 @@ export class DimensionBigBlueButtonService {
|
||||
followRedirect: followRedirect,
|
||||
jar: true, // remember cookies between requests
|
||||
json: false, // expect html
|
||||
|
||||
}, (err, res, _body) => {
|
||||
try {
|
||||
if (err) {
|
||||
@ -204,4 +443,13 @@ export class DimensionBigBlueButtonService {
|
||||
});
|
||||
}
|
||||
|
||||
private getHTTPAvatarUrlFromMXCUrl(mxc: string): string {
|
||||
const width = 64;
|
||||
const height = 64;
|
||||
const method = "scale";
|
||||
|
||||
mxc = mxc.substring("mxc://".length).split('?')[0];
|
||||
return `${config.dimension.publicUrl}/api/v1/dimension/media/thumbnail/${mxc}?width=${width}&height=${height}&method=${method}&animated=false`;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -28,6 +28,13 @@ export interface DimensionConfig {
|
||||
telegram: {
|
||||
botToken: string;
|
||||
};
|
||||
bigbluebutton: {
|
||||
apiBaseUrl: string;
|
||||
sharedSecret: string;
|
||||
widgetName: string;
|
||||
widgetTitle: string;
|
||||
widgetAvatarUrl: string;
|
||||
};
|
||||
stickers: {
|
||||
enabled: boolean;
|
||||
stickerBot: string;
|
||||
|
||||
@ -1,7 +1,15 @@
|
||||
export interface BigBlueButtonJoinRequest {
|
||||
// A URL supplied by greenlight, BigBlueButton's nice UI project that is itself
|
||||
// a BigBlueButton client
|
||||
greenlightUrl: string;
|
||||
// The name the user wishes to join the meeting with
|
||||
fullName: string;
|
||||
export interface BigBlueButtonGetJoinUrlRequest {
|
||||
// The display name of the user attempting to join the meeting.
|
||||
// Will be combined with userId and passed to BigBlueButton.
|
||||
displayName: string;
|
||||
// The user ID of the user attempting to join the meeting.
|
||||
// Will be combined with displayName and passed to BigBlueButton.
|
||||
userId: string;
|
||||
// Optional. The avatar of the user attempting to join the meeting.
|
||||
// Will be passed to BigBlueButton.
|
||||
avatarUrl: string;
|
||||
// The ID of the meeting to join.
|
||||
meetingId: string;
|
||||
// The password to join the meeting with.
|
||||
meetingPassword: string;
|
||||
}
|
||||
|
||||
@ -2,3 +2,30 @@ export interface BigBlueButtonJoinResponse {
|
||||
// The meeting URL the client should load to join the meeting
|
||||
url: string;
|
||||
}
|
||||
|
||||
export interface BigBlueButtonCreateAndJoinMeetingResponse {
|
||||
// The meeting URL the client should load to join the meeting
|
||||
url: string;
|
||||
}
|
||||
|
||||
export interface BigBlueButtonWidgetResponse {
|
||||
widget_id: string;
|
||||
widget: {
|
||||
creatorUserId: string;
|
||||
id: string;
|
||||
type: string;
|
||||
waitForIframeLoad: boolean;
|
||||
name: string;
|
||||
avatar_url: string;
|
||||
url: string;
|
||||
data: {
|
||||
title: string;
|
||||
}
|
||||
};
|
||||
layout: {
|
||||
container: string;
|
||||
index: number;
|
||||
width: number;
|
||||
height: number;
|
||||
};
|
||||
}
|
||||
@ -2,4 +2,8 @@ import * as crypto from "crypto";
|
||||
|
||||
export function md5(text: string): string {
|
||||
return crypto.createHash("md5").update(text).digest('hex').toLowerCase();
|
||||
}
|
||||
}
|
||||
|
||||
export function sha256(text: string): string {
|
||||
return crypto.createHash("sha256").update(text).digest('hex').toLowerCase();
|
||||
}
|
||||
|
||||
@ -27,6 +27,7 @@ export class BigBlueButtonConfigComponent extends WidgetComponent {
|
||||
|
||||
protected OnNewWidgetPrepared(widget: EditableWidget): void {
|
||||
widget.dimension.newData["conferenceUrl"] = this.bigBlueButtonWidget.options.conferenceUrl;
|
||||
widget.dimension.newData["createMeeting"] = this.bigBlueButtonWidget.options.createMeeting;
|
||||
}
|
||||
|
||||
protected OnWidgetBeforeAdd(widget: EditableWidget) {
|
||||
@ -43,6 +44,7 @@ export class BigBlueButtonConfigComponent extends WidgetComponent {
|
||||
let widgetQueryString = url.format({
|
||||
query: {
|
||||
"conferenceUrl": "$conferenceUrl",
|
||||
"createMeeting": "$createMeeting",
|
||||
"displayName": "$matrix_display_name",
|
||||
"avatarUrl": "$matrix_avatar_url",
|
||||
"userId": "$matrix_user_id",
|
||||
@ -50,5 +52,6 @@ export class BigBlueButtonConfigComponent extends WidgetComponent {
|
||||
});
|
||||
widgetQueryString = this.decodeParams(widgetQueryString, Object.keys(widget.dimension.newData).map(k => "$" + k));
|
||||
widget.dimension.newUrl = window.location.origin + "/widgets/bigbluebutton" + widgetQueryString;
|
||||
console.log("URL ended up as:", widget.dimension.newUrl);
|
||||
}
|
||||
}
|
||||
|
||||
@ -69,6 +69,11 @@ export interface FE_BigBlueButtonJoin {
|
||||
url: string;
|
||||
}
|
||||
|
||||
export interface FE_BigBlueButtonCreateAndJoinMeeting {
|
||||
// The meeting URL the client should load to join the meeting
|
||||
url: string;
|
||||
}
|
||||
|
||||
export interface FE_StickerConfig {
|
||||
enabled: boolean;
|
||||
stickerBot: string;
|
||||
@ -96,6 +101,7 @@ export interface FE_JitsiWidget extends FE_Widget {
|
||||
export interface FE_BigBlueButtonWidget extends FE_Widget {
|
||||
options: {
|
||||
conferenceUrl: string;
|
||||
createMeeting: boolean;
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
import { Injectable } from "@angular/core";
|
||||
import { AuthedApi } from "../authed-api";
|
||||
import { FE_BigBlueButtonJoin } from "../../models/integration"
|
||||
import { FE_BigBlueButtonJoin, FE_BigBlueButtonCreateAndJoinMeeting } from "../../models/integration"
|
||||
import { HttpClient } from "@angular/common/http";
|
||||
import { ApiError } from "../../../../../src/api/ApiError";
|
||||
|
||||
@ -10,7 +10,15 @@ export class BigBlueButtonApiService extends AuthedApi {
|
||||
super(http);
|
||||
}
|
||||
|
||||
public joinMeeting(url: string, name: string): Promise<FE_BigBlueButtonJoin|ApiError> {
|
||||
public joinMeetingWithGreenlightUrl(url: string, name: string): Promise<FE_BigBlueButtonJoin|ApiError> {
|
||||
return this.authedGet<FE_BigBlueButtonJoin|ApiError>("/api/v1/dimension/bigbluebutton/join", {greenlightUrl: url, fullName: name}).toPromise();
|
||||
}
|
||||
|
||||
public getJoinUrl(displayName: string, userId: string, avatarUrl: string, meetingId: string, meetingPassword: string): Promise<FE_BigBlueButtonCreateAndJoinMeeting|ApiError> {
|
||||
return this.authedPost<FE_BigBlueButtonCreateAndJoinMeeting|ApiError>(
|
||||
"/api/v1/dimension/bigbluebutton/getJoinUrl",
|
||||
{displayName: displayName, userId: userId, avatarUrl: avatarUrl, meetingId: meetingId, meetingPassword: meetingPassword},
|
||||
).toPromise();
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,12 +1,11 @@
|
||||
import { Component, OnDestroy, OnInit } from "@angular/core";
|
||||
import { ActivatedRoute } from "@angular/router";
|
||||
import { WidgetApiService } from "../../shared/services/integrations/widget-api.service";
|
||||
import { Subscription } from "rxjs/Subscription";
|
||||
import { ScalarWidgetApi } from "../../shared/services/scalar/scalar-widget.api";
|
||||
import { CapableWidget } from "../capable-widget";
|
||||
import { DomSanitizer, SafeUrl } from "@angular/platform-browser";
|
||||
import { BigBlueButtonApiService } from "../../shared/services/integrations/bigbluebutton-api.service";
|
||||
import { FE_BigBlueButtonJoin } from "../../shared/models/integration";
|
||||
import { FE_BigBlueButtonCreateAndJoinMeeting, FE_BigBlueButtonJoin } from "../../shared/models/integration";
|
||||
import { TranslateService } from "@ngx-translate/core";
|
||||
|
||||
@Component({
|
||||
@ -24,6 +23,28 @@ export class BigBlueButtonWidgetWrapperComponent extends CapableWidget implement
|
||||
private conferenceUrl: string;
|
||||
private displayName: string;
|
||||
private userId: string;
|
||||
private avatarUrl: string;
|
||||
private meetingId: string;
|
||||
private meetingPassword: string;
|
||||
|
||||
/**
|
||||
*
|
||||
* The name to join the BigBlueButton meeting with. Made up of metadata the client passes to us.
|
||||
*/
|
||||
private joinName: string;
|
||||
|
||||
/**
|
||||
* Whether we expect the meeting to be created on command.
|
||||
*
|
||||
* True if we'd like the meeting to be created, false if we have a greenlight URL leading to an existing meeting
|
||||
* and would like Dimension to translate that to a BigBlueButton meeting URL.
|
||||
*/
|
||||
private createMeeting: boolean;
|
||||
|
||||
/**
|
||||
* The ID of the room, required if createMeeting is true.
|
||||
*/
|
||||
private roomId: string;
|
||||
|
||||
/**
|
||||
* The poll period in ms while waiting for a meeting to start
|
||||
@ -52,7 +73,6 @@ export class BigBlueButtonWidgetWrapperComponent extends CapableWidget implement
|
||||
|
||||
constructor(activatedRoute: ActivatedRoute,
|
||||
private bigBlueButtonApi: BigBlueButtonApiService,
|
||||
private widgetApi: WidgetApiService,
|
||||
private sanitizer: DomSanitizer,
|
||||
public translate: TranslateService) {
|
||||
super();
|
||||
@ -60,12 +80,22 @@ export class BigBlueButtonWidgetWrapperComponent extends CapableWidget implement
|
||||
|
||||
let params: any = activatedRoute.snapshot.queryParams;
|
||||
|
||||
console.log("BigBlueButton: Given greenlight url: " + params.conferenceUrl);
|
||||
|
||||
this.roomId = params.roomId;
|
||||
this.createMeeting = params.createMeeting;
|
||||
this.conferenceUrl = params.conferenceUrl;
|
||||
this.displayName = params.displayName;
|
||||
this.avatarUrl = params.avatarUrl;
|
||||
this.meetingId = params.meetingId;
|
||||
this.meetingPassword = params.meetingPassword;
|
||||
this.userId = params.userId || params.email; // Element uses `email` when placing a conference call
|
||||
|
||||
// Create a nick to display in the meeting
|
||||
this.joinName = `${this.displayName} (${this.userId})`;
|
||||
|
||||
console.log("BigBlueButton: should create meeting: " + this.createMeeting);
|
||||
console.log("BigBlueButton: will join as: " + this.joinName);
|
||||
console.log("BigBlueButton: got room ID: " + this.roomId);
|
||||
|
||||
// Set the widget ID if we have it
|
||||
ScalarWidgetApi.widgetId = params.widgetId;
|
||||
}
|
||||
@ -101,12 +131,53 @@ export class BigBlueButtonWidgetWrapperComponent extends CapableWidget implement
|
||||
this.statusMessage = "Joining conference...";
|
||||
}
|
||||
|
||||
// Generate a nick to display in the meeting
|
||||
const joinName = `${this.displayName} (${this.userId})`;
|
||||
|
||||
// Make a request to Dimension requesting the join URL
|
||||
if (this.createMeeting) {
|
||||
// Ask Dimension to return a URL for joining a meeting that it created
|
||||
this.joinThroughDimension();
|
||||
} else {
|
||||
// Provide Dimension with a Greenlight URL, which it will transform into
|
||||
// a BBB meeting URL
|
||||
this.joinThroughGreenlightUrl();
|
||||
}
|
||||
}
|
||||
|
||||
// Ask Dimension to create a meeting (or use an existing one) for this room and return the embeddable meeting URL
|
||||
private async joinThroughDimension() {
|
||||
console.log("BigBlueButton: Joining meeting created by Dimension with meeting ID: " + this.meetingId);
|
||||
|
||||
this.bigBlueButtonApi.getJoinUrl(this.displayName, this.userId, this.avatarUrl, this.meetingId, this.meetingPassword).then((response) => {
|
||||
console.log("The response");
|
||||
console.log(response);
|
||||
if ("errorCode" in response) {
|
||||
// This is an instance of ApiError
|
||||
if (response.errorCode === "UNKNOWN_MEETING_ID") {
|
||||
// This meeting ID is invalid.
|
||||
// Inform the user that they should try and start a new meeting
|
||||
this.statusMessage = "This meeting has ended or otherwise does not exist.<br>Please start a new meeting.";
|
||||
return;
|
||||
}
|
||||
|
||||
if (response.errorCode === "MEETING_HAS_ENDED") {
|
||||
// It's likely that everyone has left the meeting, and it's been garbage collected.
|
||||
// Inform the user that they should try and start a new meeting
|
||||
this.statusMessage = "This meeting has ended.<br>Please start a new meeting.";
|
||||
return;
|
||||
}
|
||||
// Otherwise this is a generic error
|
||||
this.statusMessage = "An error occurred while loading the meeting";
|
||||
}
|
||||
|
||||
// Retrieve and embed the meeting URL
|
||||
const joinUrl = (response as FE_BigBlueButtonCreateAndJoinMeeting).url;
|
||||
this.embedMeetingWithUrl(joinUrl);
|
||||
});
|
||||
}
|
||||
|
||||
// Hand Dimension a Greenlight URL and receive a translated, embeddable meeting URL in response
|
||||
private joinThroughGreenlightUrl() {
|
||||
console.log("BigBlueButton: joining via greenlight url:", this.conferenceUrl);
|
||||
this.bigBlueButtonApi.joinMeeting(this.conferenceUrl, joinName).then((response) => {
|
||||
this.bigBlueButtonApi.joinMeetingWithGreenlightUrl(this.conferenceUrl, this.joinName).then((response) => {
|
||||
if ("errorCode" in response) {
|
||||
// This is an instance of ApiError
|
||||
if (response.errorCode === "WAITING_FOR_MEETING_START") {
|
||||
@ -122,32 +193,32 @@ export class BigBlueButtonWidgetWrapperComponent extends CapableWidget implement
|
||||
this.statusMessage = "An error occurred while loading the meeting";
|
||||
}
|
||||
|
||||
// Retrieve and embed the meeting URL
|
||||
const joinUrl = (response as FE_BigBlueButtonJoin).url;
|
||||
|
||||
// Check if the given URL is embeddable
|
||||
this.widgetApi.isEmbeddable(joinUrl).then(result => {
|
||||
this.canEmbed = result.canEmbed;
|
||||
this.statusMessage = null;
|
||||
|
||||
// Embed the return meeting URL, joining the meeting
|
||||
this.embedUrl = this.sanitizer.bypassSecurityTrustResourceUrl(joinUrl);
|
||||
|
||||
// Inform the client that we would like the meeting to remain visible for its duration
|
||||
ScalarWidgetApi.sendSetAlwaysOnScreen(true);
|
||||
}).catch(err => {
|
||||
console.error(err);
|
||||
this.canEmbed = false;
|
||||
this.statusMessage = "Unable to embed meeting";
|
||||
});
|
||||
this.embedMeetingWithUrl(joinUrl);
|
||||
});
|
||||
}
|
||||
|
||||
private embedMeetingWithUrl(url: string) {
|
||||
// Hide widget-related UI
|
||||
this.statusMessage = null;
|
||||
|
||||
// Embed the return meeting URL, joining the meeting
|
||||
this.canEmbed = true;
|
||||
this.embedUrl = this.sanitizer.bypassSecurityTrustResourceUrl(url);
|
||||
|
||||
// Inform the client that we would like the meeting to remain visible for its duration
|
||||
ScalarWidgetApi.sendSetAlwaysOnScreen(true);
|
||||
}
|
||||
|
||||
public ngOnDestroy() {
|
||||
if (this.bigBlueButtonApiSubscription) this.bigBlueButtonApiSubscription.unsubscribe();
|
||||
}
|
||||
|
||||
protected onCapabilitiesSent(): void {
|
||||
super.onCapabilitiesSent();
|
||||
|
||||
// Don't set alwaysOnScreen until we start a meeting
|
||||
ScalarWidgetApi.sendSetAlwaysOnScreen(false);
|
||||
}
|
||||
|
||||
|
||||
@ -293,7 +293,7 @@
|
||||
"There are currently no integrations which support encrypted rooms. Sorry about that!": "Derzeit gibt es keine Integrationen, die verschlüsselte Räume unterstützen. Das tut mir leid!",
|
||||
"No integrations available": "Keine Integrationen verfügbar",
|
||||
"This room does not have any compatible integrations. Please contact the server owner if you're seeing this message.": "Dieser Raum hat keine kompatiblen Integrationen. Bitte wenden Sie sich an den Server-Administrator, wenn diese Meldung angezeigt wird.",
|
||||
"BigBlueButton Conference": "",
|
||||
"BigBlueButton Conference": "BigBlueButton Konferenz",
|
||||
"Join Conference": "An der Konferenz teilnehmen",
|
||||
"Sorry, this content cannot be embedded": "Dieser Inhalt kann leider nicht eingebettet werden",
|
||||
"Start camera:": "",
|
||||
|
||||
@ -293,7 +293,7 @@
|
||||
"There are currently no integrations which support encrypted rooms. Sorry about that!": "There are currently no integrations which support encrypted rooms. Sorry about that!",
|
||||
"No integrations available": "No integrations available",
|
||||
"This room does not have any compatible integrations. Please contact the server owner if you're seeing this message.": "This room does not have any compatible integrations. Please contact the server owner if you're seeing this message.",
|
||||
"BigBlueButton Conference": "",
|
||||
"BigBlueButton Conference": "BigBlueButton Conference",
|
||||
"Join Conference": "Join Conference",
|
||||
"Sorry, this content cannot be embedded": "Sorry, this content cannot be embedded",
|
||||
"Start camera:": "",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user