Web Agora.io DYNAMIC_KEY_EXPIRED

Question

I am using c# with mvc.

I used this code to generate token and generated successfully. but after generate token when join channel using .join() it return DYNAMIC_KEY_EXPIRED. I Used "AgoraRTCSDK-3.1.0.js"

I used https://github.com/AgoraIO/Tools/blob/master/DynamicKey/AgoraDynamicKey/csharp to generate dynamic token

If any one has experience on Agora.io, please help me.

Sample code is..

AccessToken token = new AccessToken(apiKey, appCertificate, channelName, "0");
token.addPrivilege(Privileges.kJoinChannel, _expiredTs);
token.addPrivilege(Privileges.kPublishAudioStream, _expiredTs);
token.addPrivilege(Privileges.kPublishVideoStream, _expiredTs);
string strToken = token.build();

public string build()
    {
        this._messageRawContent = Utils.pack(this.message);
        this._signature = generateSignature(_appCertificate
                , _appId
                , _channelName
                , _uid
                , _messageRawContent);

        this._crcChannelName = Crc32CAlgorithm.Compute(this._channelName.GetByteArray());
        this._crcUid = Crc32CAlgorithm.Compute(this._uid.GetByteArray());

        PackContent packContent = new PackContent(_signature, _crcChannelName, _crcUid, this._messageRawContent);
        byte[] content = Utils.pack(packContent);
        return getVersion() + this._appId + Utils.base64Encode(content);
    }

Answer 1

Whenever you generate a token for Agora applications, you need to keep in mind that the expiration time is calculated as a timestamp (time since 1970) so you need to ensure the the expiration time is set to the currentTime + expirationTimeInSeconds.

In the above example you are passing the expiration time as 0 which generates a token that is already considered expired.

consider using:

  // set a expiration time of 1 hour in seconds
  let expireTime = 3600;

  // calculate current time in seconds
  const currentTime = Math.floor(Date.now() / 1000);

  // calculate privilege expire time
  const privilegeExpireTime = currentTime + expireTime;