[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-03。"],[],[],null,["# Prepare for your client application to work with Google Ad Manager\n\nCollect the required information for your client applications\n-------------------------------------------------------------\n\nYou should have the following information that is required for\nGoogle Ad Manager to create a live stream session:\n\n**Table 1.** Required information for Ad Manager-enabled live stream sessions\n\nGenerate short-lived OAuth tokens for testing\n---------------------------------------------\n\nTo generate a\n[short-lived OAuth token](/iam/docs/creating-short-lived-service-account-credentials)\nassociated with the\n[service account](/video-stitcher/docs/how-to/gam/before-you-begin#create-service-account-to-create-sessions) with the **Video Stitcher User** role, follow\nthese steps:\n\n1. Replace \u003cvar translate=\"no\"\u003ePATH_TO_YOUR_SERVICE_KEY\u003c/var\u003e with the path to the JSON file you downloaded to your local machine. \n\n ```bash\n gcloud auth activate-service-account --key-file PATH_TO_YOUR_SERVICE_KEY\n ```\n2. Retrieve the OAuth 2.0 bearer token from the service account: \n\n ```bash\n gcloud auth print-access-token\n ```\n\nBecause this is a short-lived token, you need to generate it again\nperiodically with the `gcloud auth print-access-token` command and send the new\ntokens to your client applications. See the following section for more\ninformation on building a production service to provide short-lived tokens.\n| **Important:** Regenerating an OAuth token is a time-consuming operation. Try to reuse an OAuth token as much as possible when creating sessions. You can extend the lifetime of a token using the [`--lifetime` flag](/sdk/gcloud/reference/auth/application-default/print-access-token).\n\nCreate a service to provide information to your client applications\n-------------------------------------------------------------------\n\nCreate a service that can provide the required information to be passed to the\nclient. When the application requests information from your service on how to\nplay a live stream, the service should return the information described in\n[Table 1](#collect-info).\n\nIn particular, the service must be able to provide OAuth tokens to\nclient applications in a secure manner. Configure this service using two service\naccounts, one\n[impersonating the other](/docs/authentication/use-service-account-impersonation).\nOne service account has the **Service Token Creator** role and creates an OAuth\ntoken for the service account that has the **Video Stitcher User** role. For\nexample:\n\n- Service account 1: This is the caller service account. This account has the **Service Token Creator** permission on service account 2 and impersonates service account 2 to client applications.\n- Service account 2: This is the privilege-bearing service account that has the **Video Stitcher User** role to create sessions.\n\nFor information on providing an OAuth token from your service, including client\nlibrary code samples, see\n[Create a short-lived access token](/iam/docs/create-short-lived-credentials-direct#sa-credentials-oauth)."]]
