Upload videos to Youtube from my web server in Java

问题

My goal is to upload videos that are uploaded to my web server to Youtube on my own channel, not the users' Youtube account (my web server is acting as a proxy).

I found the sample code for uploading video to Youtube here with the credential acquired this way. The problem that I have with this sample is that it writes to disk the credential, and it opens an http server. Since my web server can potentially have a lot of users uploading their videos concurrently, the credential file location has to be dynamic, and multiple binding to the same http port is not possible. Further more, after searching through other writing about uploading to Youtube, I think this approach is for users uploading to their Youtube account.

Could you share your experiences/code sample/solutions for my scenario? In short I am just trying to automate the process of me opening up Youtube dashboard, and uploading videos to a channel in my Youtube.

回答1:

In general, starting at API V3, Google prefers OAuth2 over other mechanism, and uploading a video (or any other action that modifies user data) requires OAuth2.

Fortunately, there is a special kind of token called refresh token to the rescue. Refresh token does not expire like normal access token, and is used to generate normal access token when needed. So, I divided my application into 2 parts:

• The 1st part is for generating refresh token, which is a Java desktop app, meant to be run by a user on a computer. See here for sample code from Google.
• The 2nd part is is part of my web application, which uses a given refresh token to create a credential object.

Here is my implementation in Scala, which you can adapt to Java version easily:

For generating a refresh token, you should set the accessType to offline for the authorization flow. Note: if a token already exists on your system, it won't try to get new token, even if it does not have refresh token, so you also have to set approval prompt to force:

def authorize(dataStoreName: String, clientId: String, clientSecret: String): Credential = {

    val builder = new GoogleAuthorizationCodeFlow.Builder(
      HTTP_TRANSPORT,
      JSON_FACTORY,
      clientId,
      clientSecret,
      Seq(YouTubeScopes.YOUTUBE_UPLOAD)
    )

    val CREDENTIAL_DIRECTORY = s"${System.getProperty("user.home")}/.oauth-credentials"
    val fileDataStoreFactory = new FileDataStoreFactory(new java.io.File(CREDENTIAL_DIRECTORY))
    val dataStore: DataStore[StoredCredential] = fileDataStoreFactory.getDataStore(dataStoreName)

    builder.setCredentialDataStore(dataStore).setAccessType("offline").setApprovalPrompt("force")

    val flow = builder.build()

    val localReceiver = new LocalServerReceiver.Builder().setPort(8000).build()

    new AuthorizationCodeInstalledApp(flow, localReceiver).authorize("user")
}

val credential = authorize(dataStore, clientId, clientSecret)
val refreshToken = credential.getRefreshToken

For using the refresh token on the server, you can build a credential from a refresh token:

def getCredential = new GoogleCredential.Builder()
    .setJsonFactory(JSON_FACTORY)
    .setTransport(HTTP_TRANSPORT)
    .setClientSecrets(clientId, clientSecret)
    .build()
    .setRefreshToken(refreshToken)

回答2:

I have have bypassed the whole AuthorizationCodeInstalledApp authorize() method and created a new subclass which bypasses the jetty server implementation process. The methods are as follows

1. getAuthorizationFromStorage : Get access token from stored credentials.
2. getAuthorizationFromGoogle : Get the authentication with the credentials from Google creates the url that will lead the user to the authentication page and creating a custom defined name-value pair in the state parameter. The value should be encoded with base64 encoder so we can receive the same code redirected from google after authentication.

3. saveAuthorizationFromGoogle : Save the credentials that we get from google.

   • Create the GoogleAuthorizationCodeFlow object from the credentialDatastorfrom the response received from the google after authentication.
   • Hit google to get the permanent refresh-token that can be used to get the accesstoken of the user any time .
   • Store the tokens like accesstoken and refreshtoken in the filename as userid

Checkout the code Implementation here

来源：https://stackoverflow.com/questions/31737699/upload-videos-to-youtube-from-my-web-server-in-java