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/**
* OpenTok Java SDK
* Copyright (C) 2017 TokBox, Inc.
* http://www.tokbox.com
*
* Licensed under The MIT License (MIT). See LICENSE file for more information.
*/
package com.opentok;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.opentok.exception.InvalidArgumentException;
import com.opentok.exception.OpenTokException;
import com.opentok.exception.RequestException;
import com.opentok.util.Crypto;
import com.opentok.util.HttpClient;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.Proxy;
import java.util.Collection;
import java.util.List;
import java.util.Map;
/**
* Contains methods for creating OpenTok sessions, generating tokens, and working with archives.
*
* To create a new OpenTok object, call the OpenTok constructor with your OpenTok API key
* and the API secret for your TokBox account. Do not publicly share
* your API secret. You will use it with the OpenTok constructor (only on your web
* server) to create OpenTok sessions.
*
* Be sure to include the entire OpenTok server SDK on your web server.
*/
public class OpenTok {
private int apiKey;
private String apiSecret;
protected HttpClient client;
static protected ObjectReader archiveReader = new ObjectMapper()
.readerFor(Archive.class);
static protected ObjectReader archiveListReader = new ObjectMapper()
.readerFor(ArchiveList.class);
static protected ObjectReader createdSessionReader = new ObjectMapper()
.readerFor(CreatedSession[].class);
static final String defaultApiUrl = "https://api.opentok.com";
/**
* Creates an OpenTok object.
*
* @param apiKey Your OpenTok API key. (See your TokBox account page.)
* @param apiSecret Your OpenTok API secret. (See your TokBox account page.)
*/
public OpenTok(int apiKey, String apiSecret) {
this.apiKey = apiKey;
this.apiSecret = apiSecret.trim();
this.client = new HttpClient.Builder(apiKey, apiSecret).build();
}
private OpenTok(int apiKey, String apiSecret, HttpClient httpClient) {
this.apiKey = apiKey;
this.apiSecret = apiSecret.trim();
this.client = httpClient;
}
/**
* Creates a token for connecting to an OpenTok session. In order to authenticate a user
* connecting to an OpenTok session, the client passes a token when connecting to the session.
*
* The following example shows how to obtain a token that has a role of "subscriber" and
* that has a connection metadata string:
*
*
* import com.opentok.Role;
* import com.opentok.TokenOptions;
*
* class Test {
* public static void main(String argv[]) throws OpenTokException {
* int API_KEY = 0; // Replace with your OpenTok API key (see https://tokbox.com/account).
* String API_SECRET = ""; // Replace with your OpenTok API secret.
* OpenTok sdk = new OpenTok(API_KEY, API_SECRET);
*
* //Generate a basic session. Or you could use an existing session ID.
* String sessionId = System.out.println(sdk.createSession());
*
* // Replace with meaningful metadata for the connection.
* String connectionMetadata = "username=Bob,userLevel=4";
*
* // Use the Role value appropriate for the user.
* String role = Role.SUBSCRIBER;
*
* // Generate a token:
* TokenOptions options = new TokenOptions.Buider().role(role).data(connectionMetadata).build();
* String token = sdk.generateToken(sessionId, options);
* System.out.println(token);
* }
* }
*
*
* For testing, you can also generate tokens by logging in to your TokBox account.
*
* @param sessionId The session ID corresponding to the session to which the user will connect.
*
* @param tokenOptions This TokenOptions object defines options for the token.
* These include the following:
*
*
* - The role of the token (subscriber, publisher, or moderator)
* - The expiration time of the token
* - Connection data describing the end-user
*
*
* @return The token string.
*/
public String generateToken(String sessionId, TokenOptions tokenOptions) throws OpenTokException {
List sessionIdParts = null;
if (sessionId == null || sessionId == "") {
throw new InvalidArgumentException("Session not valid");
}
try {
sessionIdParts = Crypto.decodeSessionId(sessionId);
} catch (UnsupportedEncodingException e) {
throw new InvalidArgumentException("Session ID was not valid");
}
if (!sessionIdParts.contains(Integer.toString(this.apiKey))) {
throw new InvalidArgumentException("Session ID was not valid");
}
// NOTE: kind of wasteful of a Session instance
Session session = new Session(sessionId, apiKey, apiSecret);
return session.generateToken(tokenOptions);
}
/**
* Creates a token for connecting to an OpenTok session, using the default settings. The default
* settings are the following:
*
*
* - The token is assigned the role of publisher.
* - The token expires 24 hours after it is created.
* - The token includes no connection data.
*
*
*
* The following example shows how to generate a token that has the default settings:
*
*
* import com.opentok.OpenTok;
*
* class Test {
* public static void main(String argv[]) throws OpenTokException {
* int API_KEY = 0; // Replace with your OpenTok API key (see https://tokbox.com/account).
* String API_SECRET = ""; // Replace with your OpenTok API secret.
* OpenTok sdk = new OpenTok(API_KEY, API_SECRET);
*
* //Generate a basic session. Or you could use an existing session ID.
* String sessionId = System.out.println(sdk.createSession().getSessionId());
*
* String token = sdk.generateToken(sessionId);
* System.out.println(token);
* }
* }
*
* @param sessionId The session ID corresponding to the session to which the user will connect.
*
* @return The token string.
*
* @see #generateToken(String, TokenOptions)
*/
public String generateToken(String sessionId) throws OpenTokException {
return generateToken(sessionId, new TokenOptions.Builder().build());
}
/**
* Creates a new OpenTok session.
*
* For example, when using the OpenTok.js library, use the session ID when calling the
*
* OT.initSession() method (to initialize an OpenTok session).
*
* OpenTok sessions do not expire. However, authentication tokens do expire (see the
* {@link #generateToken(String, TokenOptions)} method). Also note that sessions cannot
* explicitly be destroyed.
*
* A session ID string can be up to 255 characters long.
*
* Calling this method results in an {@link com.opentok.exception.OpenTokException} in
* the event of an error. Check the error message for details.
*
* The following code creates a session that attempts to send streams directly between clients
* (falling back to use the OpenTok TURN server to relay streams if the clients cannot connect):
*
*
* import com.opentok.MediaMode;
* import com.opentok.OpenTok;
* import com.opentok.Session;
* import com.opentok.SessionProperties;
*
* class Test {
* public static void main(String argv[]) throws OpenTokException {
* int API_KEY = 0; // Replace with your OpenTok API key.
* String API_SECRET = ""; // Replace with your OpenTok API secret.
* OpenTok sdk = new OpenTok(API_KEY, API_SECRET);
*
* SessionProperties sp = new SessionProperties().Builder()
* .mediaMode(MediaMode.RELAYED).build();
*
* Session session = sdk.createSession(sp);
* System.out.println(session.getSessionId());
* }
* }
*
*
* You can also create a session using the OpenTok
* REST API or or by logging in to your
* TokBox account.
*
* @param properties This SessionProperties object defines options for the session.
* These include the following:
*
*
* - Whether the session's streams will be transmitted directly between peers or
* using the OpenTok Media Router.
*
* - A location hint for the location of the OpenTok server to use for the session.
*
*
* @return A Session object representing the new session. Call the getSessionId()
* method of the Session object to get the session ID, which uniquely identifies the
* session. You will use this session ID in the client SDKs to identify the session.
*/
public Session createSession(SessionProperties properties) throws OpenTokException {
final SessionProperties _properties = properties != null ? properties : new SessionProperties.Builder().build();
final Map> params = _properties.toMap();
final String response = this.client.createSession(params);
try {
CreatedSession[] sessions = createdSessionReader.readValue(response);
// A bit ugly, but API response should include an array with one session
if (sessions.length != 1) {
throw new OpenTokException(String.format("Unexpected number of sessions created %d", sessions.length));
}
return new Session(sessions[0].getId(), apiKey, apiSecret, _properties);
} catch (IOException e) {
throw new OpenTokException("Cannot create session. Could not read the response: " + response);
}
}
/**
* Creates an OpenTok session with the default settings:
*
*
*
* - The media mode is "relayed". The session will attempt to transmit streams
* directly between clients. If two clients cannot send and receive each others'
* streams, due to firewalls on the clients' networks, their streams will be
* relayed using the OpenTok TURN Server.
* - The session uses the first client connecting to determine the location of the
* OpenTok server to use.
*
*
*
* The following example creates a session that uses the default settings:
*
*
* import com.opentok.OpenTok;
* import com.opentok.SessionProperties;
*
* class Test {
* public static void main(String argv[]) throws OpenTokException {
* int API_KEY = 0; // Replace with your OpenTok API key.
* String API_SECRET = ""; // Replace with your OpenTok API secret.
* OpenTok sdk = new OpenTok(API_KEY, API_SECRET);
*
* String sessionId = sdk.createSession();
* System.out.println(sessionId);
* }
* }
*
*
* @return A Session object representing the new session. Call the getSessionId()
* method of the Session object to get the session ID, which uniquely identifies the
* session. You will use this session ID in the client SDKs to identify the session.
*
* @see #createSession(SessionProperties)
*/
public Session createSession() throws OpenTokException {
return createSession(null);
}
/**
* Gets an {@link Archive} object for the given archive ID.
*
* @param archiveId The archive ID.
* @return The {@link Archive} object.
*/
public Archive getArchive(String archiveId) throws OpenTokException {
String archive = this.client.getArchive(archiveId);
try {
return archiveReader.readValue(archive);
} catch (Exception e) {
throw new RequestException("Exception mapping json: " + e.getMessage());
}
}
/**
* Returns a List of {@link Archive} objects, representing archives that are both
* both completed and in-progress, for your API key. This list is limited to 1000 archives
* starting with the first archive recorded. For a specific range of archives, call
* {@link #listArchives(int offset, int count)}.
*
* @return A List of {@link Archive} objects.
*/
public ArchiveList listArchives() throws OpenTokException {
return listArchives(0, 1000);
}
/**
* Returns a List of {@link Archive} objects, representing archives that are both
* both completed and in-progress, for your API key.
*
* @param offset The index offset of the first archive. 0 is offset of the most recently started
* archive.
* 1 is the offset of the archive that started prior to the most recent archive.
* @param count The number of archives to be returned. The maximum number of archives returned
* is 1000.
* @return A List of {@link Archive} objects.
*/
public ArchiveList listArchives(int offset, int count) throws OpenTokException {
String archives = this.client.getArchives(offset, count);
try {
return archiveListReader.readValue(archives);
} catch (JsonProcessingException e) {
throw new RequestException("Exception mapping json: " + e.getMessage());
} catch (IOException e) {
throw new RequestException("Exception mapping json: " + e.getMessage());
}
}
/**
* Starts archiving an OpenTok session. This version of the startArchive() method
* lets you disable audio or video recording.
*
* Clients must be actively connected to the OpenTok session for you to successfully start
* recording an archive.
*
* You can only record one archive at a time for a given session. You can only record archives
* of sessions that use the OpenTok Media Router (sessions with the
* media mode
* set to routed); you cannot archive sessions with the media mode set to relayed.
*
* For more information on archiving, see the
* OpenTok archiving
* programming guide.
*
* @param sessionId The session ID of the OpenTok session to archive.
*
* @param properties This ArchiveProperties object defines options for the archive.
*
* @return The Archive object. This object includes properties defining the archive, including the archive ID.
*/
public Archive startArchive(String sessionId, ArchiveProperties properties) throws OpenTokException {
if (sessionId == null || sessionId == "") {
throw new InvalidArgumentException("Session not valid");
}
// TODO: do validation on sessionId and name
String archive = this.client.startArchive(sessionId, properties);
try {
return archiveReader.readValue(archive);
} catch (Exception e) {
throw new RequestException("Exception mapping json: " + e.getMessage());
}
}
public Archive startArchive(String sessionId) throws OpenTokException {
return startArchive(sessionId, new ArchiveProperties.Builder().build());
}
public Archive startArchive(String sessionId, String name) throws OpenTokException {
ArchiveProperties properties = new ArchiveProperties.Builder().name(name).build();
return startArchive(sessionId, properties);
}
/**
* Stops an OpenTok archive that is being recorded.
*
* Archives automatically stop recording after 120 minutes or when all clients have disconnected
* from the session being archived.
*
* @param archiveId The archive ID of the archive you want to stop recording.
* @return The Archive object corresponding to the archive being stopped.
*/
public Archive stopArchive(String archiveId) throws OpenTokException {
String archive = this.client.stopArchive(archiveId);
try {
return archiveReader.readValue(archive);
} catch (Exception e) {
throw new RequestException("Exception mapping json: " + e.getMessage());
}
}
/**
* Deletes an OpenTok archive.
*
* You can only delete an archive which has a status of "available" or "uploaded". Deleting an
* archive removes its record from the list of archives. For an "available" archive, it also
* removes the archive file, making it unavailable for download.
*
* @param archiveId The archive ID of the archive you want to delete.
*/
public void deleteArchive(String archiveId) throws OpenTokException {
this.client.deleteArchive(archiveId);
}
public static class Builder {
private int apiKey;
private String apiSecret;
private String apiUrl;
private Proxy proxy;
public Builder(int apiKey, String apiSecret) {
this.apiKey = apiKey;
this.apiSecret = apiSecret;
}
public Builder apiUrl(String apiUrl) {
this.apiUrl = apiUrl;
return this;
}
public Builder proxy(Proxy proxy) {
this.proxy = proxy;
return this;
}
public OpenTok build() {
HttpClient.Builder clientBuilder = new HttpClient.Builder(apiKey, apiSecret);
if (this.apiUrl != null) {
clientBuilder.apiUrl(this.apiUrl);
}
if (this.proxy != null) {
clientBuilder.proxy(this.proxy);
}
return new OpenTok(this.apiKey, this.apiSecret, clientBuilder.build());
}
}
public void close() {
this.client.close();
}
}