The OpenTok Go SDK lets you generate sessions and tokens for OpenTok applications. It also includes methods for working with OpenTok archives, working with OpenTok live streaming broadcasts, working with OpenTok SIP interconnect and disconnecting clients from sessions.
For usage and more information, please refer to GoDoc.
Use go get to retrieve the SDK to add it to your GOPATH workspace, or project's Go module dependencies.
go get github.com/calvertyang/opentok-go-sdk/v2
To update the SDK use go get -u to retrieve the latest version of the SDK.
go get -u github.com/calvertyang/opentok-go-sdk/v2
import "github.com/calvertyang/opentok-go-sdk/v2/opentok"
ot := opentok.New(apiKey, apiSecret)For most API calls, use the API secret for the specific project in your account.
This is provided on the Project page of your TokBox Account.
However, the methods of account management are restricted to registered administrators for the OpenTok account.
To use these methods, you must use the account API key and secret, which is only available to the account administrator,
To create an OpenTok Session, use the OpenTok.CreateSession(options) method. The options parameter is an struct used to specify the following:
-
Whether the session uses the OpenTok Media Router, which is required for some OpenTok features (such as archiving)
-
A location hint for the OpenTok server.
-
Whether the session is automatically archived.
// Create a session that will attempt to transmit streams directly between clients.
// If clients cannot connect, the session uses the OpenTok TURN server:
session, err := ot.CreateSession(&opentok.SessionOptions{})
// The session will the OpenTok Media Router:
session, err := ot.CreateSession(&opentok.SessionOptions{
MediaMode: opentok.Routed,
})
// A Session with a location hint
session, err := ot.CreateSession(&opentok.SessionOptions{
Location: "12.34.56.78",
})
// A Session with an automatic archiving
session, err := ot.CreateSession(&opentok.SessionOptions{
ArchiveMode: opentok.AutoArchived,
MediaMode: opentok.Routed,
})Once a Session is created, you can start generating Tokens for clients to use when connecting to it.
You can generate a token by calling the OpenTok.GenerateToken(sessionID, options) method, or by calling the Session.GenerateToken(options) method on the instance after creating it.
// Generate a Token from just a session_id (fetched from a database)
token, err := ot.GenerateToken(sessionID, &opentok.TokenOptions{})
// Generate a Token from a session object (returned from OpenTok.CreateSession)
token, err := session.GenerateToken(&opentok.TokenOptions{})
// Set some options in a Token
token, err := session.GenerateToken(&opentok.TokenOptions{
Role: opentok.Moderator,
ExpireTime: time.Now().UTC().Add(7 * 24 * time.Hour).Unix(), // in one week
Data: "name=Johnny",
InitialLayoutClassList: []string{"focus"},
})You can send a signal to all participants in an OpenTok Session by calling the OpenTok.SendSessionSignal(sessionID, signalData) method.
err := ot.SendSessionSignal(sessionID, &opentok.SignalData{
Type: "foo",
Data: "bar",
})Or send a signal to a specific participant in the session by calling the OpenTok.SendConnectionSignal(sessionID, connectionID, signalData) method.
err := ot.SendConnectionSignal(sessionID, connectionID, &opentok.SignalData{
Type: "foo",
Data: "bar",
})This is the server-side equivalent to the signal() method in the OpenTok client SDKs. See OpenTok signaling developer guide.
You can disconnect participants from an OpenTok Session using the OpenTok.ForceDisconnect(sessionID, connectionID) method.
err := ot.ForceDisconnect(sessionID, connectionID)This is the server-side equivalent to the forceDisconnect() method in OpenTok.js: https://www.tokbox.com/developer/guides/moderation/js/#force_disconnect.
You can get information on an active stream in an OpenTok session
To get information on all streams in a session, call OpenTok.ListStreams(sessionID).
streams, err := ot.ListStreams(sessionID)To get information of a specific stream in a session, call OpenTok.GetStream(sessionID, streamID).
stream, err := ot.GetStream(sessionID, streamID)You can only record archives of sessions that use the OpenTok Media Router (with the media mode set to routed).
You can start the recording of an OpenTok Session using the OpenTok.StartArchive(sessionID, options) method. Note that you can only start an Archive on a Session that has clients connected.
// Start an archive
archive, err := ot.StartArchive(sessionID, &opentok.ArchiveOptions{})
// Start a named Archive
archive, err := ot.StartArchive(sessionID, &opentok.ArchiveOptions{
Name: "Important Presentation",
})You can also disable audio or video recording by setting the HasAudio or HasVideo property of the options parameter to false:
// Start an audio-only Archive
archive, err := ot.StartArchive(sessionID, &opentok.ArchiveOptions{
Name: "Important Presentation",
HasVideo: false,
})By default, all streams are recorded to a single (composed) file. You can record the different streams in the session to individual files (instead of a single composed file) by setting the OutputMode option to Opentok.Individual when you call the OpenTok.StartArchive() method:
// Start an Archive with individual output mode
archive, err := ot.StartArchive(sessionID, &opentok.ArchiveOptions{
Name: "Important Presentation",
OutputMode: opentok.Individual,
})For composed archives you can set the resolution of the archive, either SD ("640x480", the default) or HD ("1280x720").
// Start an Archive with HD resolution
archive, err := ot.StartArchive(sessionID, &opentok.ArchiveOptions{
Name: "Important Presentation",
Resolution: opentok.HD,
})You can stop the recording of a started Archive using the OpenTok.StopArchive(archiveID) method. You can also do this using the Archive.Stop() method on the Archive instance.
// Stop an Archive from an archiveID (fetched from database)
result, err := ot.StopArchive(archiveID)
// Stop an Archive from an instance (returned from Opentok.StartArchive)
result, err := archive.Stop()To get an OpenTok.Archive instance (and all the information about it) from an archiveID, use the OpenTok.GetArchive(archiveID) method.
archive, err := ot.GetArchive(archiveID)To delete an Archive, you can call the OpenTok.deleteArchive(archiveID) method or the Delete() method of an OpenTok.Archive instance.
// Delete an Archive from an archiveID (fetched from database)
err := ot.DeleteArchive(archiveID)
// Delete an Archive from an Archive instance, returned from the OpenTok.StartArchive(),
// OpenTok.GetArchive(), or OpenTok.ListArchives() methods
err := archive.Delete()You can also get a list of all the Archives you've created (up to 1000) with your API Key. This is done using the OpenTok.ListArchives(options) method.
// Paginate through the results via offset by 100 and count by 50
archives, err := ot.ListArchives(&opentok.ArchiveListOptions{
Offset: 100,
Count: 50,
})
// List archives for a specific session ID
archives, err := ot.ListArchives(&opentok.ArchiveListOptions{
SessionID: "2_MX4xMDB-flR1-QxNzIxNX4",
})Note that you can also create an automatically archived session, by passing in OpenTok.AutoArchived as the ArchiveMode option when you call the OpenTok.CreateSession() method (see "Creating Sessions" above).
For an OpenTok project, you can have OpenTok upload completed archives to an Amazon S3 bucket (or an S3-compliant storage provider) or Microsoft Azure container by calling the OpenTok.SetArchiveStorage(options) method.
// Set an archive upload target to Amazon S3 and prevents archive files from
// being stored in the OpenTok cloud if the upload fails.
result, err := ot.SetArchiveStorage(&opentok.StorageOptions{
Type: "s3",
Config: opentok.AmazonS3Config{
AccessKey: "myUsername",
SecretKey: "myPassword",
Bucket: "bucketName",
},
Fallback: "none",
})
// Set an archive upload target to an S3-compliant storage provider
result, err := ot.SetArchiveStorage(&opentok.StorageOptions{
Type: "s3",
Config: opentok.AmazonS3Config{
AccessKey: "myUsername",
SecretKey: "myPassword",
Bucket: "bucketName",
Endpoint: "s3.example.com"
},
})
// Set an archive upload target to Microsoft Azure
result, err := ot.SetArchiveStorage(&opentok.StorageOptions{
Type: "azure",
Config: opentok.AzureConfig{
AccountName: "myAccountname",
AccountKey: "myAccountKey",
Container: "containerName",
Domain: "domainName" // optional
},
})Once the archive upload target is set for a project, you can also delete it by calling OpenTok.DeleteArchiveStorage() method.
// Delete the configuration of archive storage.
err := ot.DeleteArchiveStorage()For composed archives, you can change the layout dynamically, using the OpenTok.SetArchiveLayout(archiveID, layoutOptions) method.
archive, err := ot.SetArchiveLayout(archiveID, &opentok.Layout{
Type: opentok.PIP,
})You can add an audio-only stream from an external third-party SIP gateway using the SIP Interconnect feature. This requires a SIP URI, the session ID you wish to add the audio-only stream to.
sipCall, err := ot.Dial(sessionID, &opentok.DialOptions{
SIP: &opentok.SIP{
URI: "sip:user@sip.partner.com;transport=tls",
From: "from@example.com",
Headers: &opentok.SIPHeaders{
"headerKey": "headerValue",
},
Auth: &opentok.SIPAuth{
Username: "username",
Password: "password",
},
Secure: true,
},
})Important: Only routed OpenTok sessions support live streaming broadcasts.
To start a live streaming broadcast of an OpenTok session, call the OpenTok.StartBroadcast(sessionID, options) method.
broadcast, err := ot.StartBroadcast(sessionID, &opentok.BroadcastOptions{
Layout: &opentok.Layout{
Type: opentok.VerticalPresentation,
},
MaxDuration: 5400,
Outputs: &opentok.BroadcastOutputOptions{
HLS: &opentok.HLSConfig{},
RTMP: []*opentok.RTMPConfig{
&opentok.RTMPConfig{
ID: "foo",
ServerURL: "rtmps://myfooserver/myfooapp",
StreamName: "myfoostream",
},
&opentok.RTMPConfig{
ID: "bar",
ServerURL: "rtmp://mybarserver/mybarapp",
StreamName: "mybarstream",
},
},
},
Resolution: opentok.HD,
})See the API reference for details on the options parameter.
Call the OpenTok.StopBroadcast(broadcastID) method to stop a live streaming broadcast.
broadcast, err := ot.StopBroadcast(broadcastID)You can also call the Stop() method of the Broadcast instance to stop a broadcast.
broadcast, err := ot.StopBroadcast(broadcastID)Call the Opentok.GetBroadcast(broadcastID) method, to get a Broadcast instance.
broadcast, err := ot.GetBroadcast(broadcastID)You can also get a list of all the Broadcasts you've created (up to 1000) with your API Key. This is done using the OpenTok.ListBroadcasts(options) method.
// Paginate through the results via offset by 100 and count by 50
broadcasts, err := ot.ListBroadcasts(&opentok.BroadcastListOptions{
Offset: 100,
Count: 50,
})
// List broadcasts for a specific session ID
broadcasts, err := ot.ListBroadcasts(&opentok.BroadcastListOptions{
SessionID: "2_MX4xMDB-flR1-QxNzIxNX4",
})To change the broadcast layout, call the OpenTok.SetBroadcastLayout(broadcastID, layoutOptions) method.
broadcast, err := ot.SetBroadcastLayout(broadcastID, &opentok.Layout{
Type: opentok.PIP,
})You can set the initial layout class for a client's streams by setting the layout option when you create the token for the client, using the OpenTok.generateToken() method. And you can change the layout classes for streams in a session by calling the OpenTok.SetStreamClassLists(sessionID, options) method.
streams, err := ot.SetStreamClassLists(sessionID, &opentok.StreamClassOptions{
Items: []*opentok.StreamClass{
&opentok.StreamClass{
ID: "8b732909-0a06-46a2-8ea8-074e64d43422",
LayoutClassList: []string{"full"},
},
},
})Setting the layout of a live streaming broadcast is optional. By default, live streaming broadcasts use the "best fit" layout.
Use this method to create an OpenTok API key and secret for a project.
Note: You can also create a new project on your TokBox account page.
// Create a new project
project, err := ot.CreateProject("")
// Create a new project with specific project name
project, err := ot.CreateProject("foo")Account administrators can use this method to change a project's status. The status is either active or suspended. If a project's status is suspended, you will not be able to use the project API key (and any OpenTok sessions created with it).
You can change a project's status from active to suspended and back.
// Change the project status to suspended by project API key
project, err := ot.ChangeProjectStatus("PROJECT_API_KEY", opentok.ProjectSuspended)
// Change the project status to active by project API key
project, err := ot.ChangeProjectStatus("PROJECT_API_KEY", opentok.ProjectActive)Use this method to delete a project. This prevents the use of the project API key (an any OpenTok sessions created with it).
You can also temporarily suspend a project's API key.
Note: You can also delete a project on your TokBox account page.
err := ot.DeleteProject("PROJECT_API_KEY")Use OpenTok.GetProject(projectAPIKey) method to get the project details record describing the project, or use OpenTok.ListProjects() method to get the records for all projects.
// Get all projects information
projects, err := ot.ListProjects()
// Get the project information with specific project API key
projects, err := ot.GetProject("PROJECT_API_KEY")For security reasons, you may want to generate a new API secret for a project.
Note: Use the new API secret for all REST API calls and with the OpenTok server-side SDKs. When you generate a new API secret, all existing client tokens become invalid (and they cannot be used to connect to OpenTok sessions); use the new API secret with the OpenTok server SDK to generate client tokens.
project, err := ot.RefreshProjectSecret("PROJECT_API_KEY")You need an OpenTok API key and API secret, which you can obtain by logging into your TokBox account.
The OpenTok Go SDK requires Go 1.12 or higher. It may work on older versions but they are no longer tested.
See the Releases page for details about each release.