建立新的 CDN 金鑰

影片資產通常會透過內容傳遞網路 (CDN) 發布。為保護內容，影片素材資源網址可能需要簽章才能擷取，這就是所謂的網址簽署。 建立 CDN 金鑰，啟用影片資產的 API 存取權。

深入探索

如需包含這個程式碼範例的詳細說明文件，請參閱下列內容：

• 建立及管理 CDN 金鑰
• 在直播中插入廣告
• 在 VOD 素材資源中插入廣告

程式碼範例

C#

在試用這個範例之前，請先按照C#使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API C# API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

using Google.Api.Gax.ResourceNames;
using Google.Cloud.Video.Stitcher.V1;
using Google.LongRunning;
using Google.Protobuf;
using System.Threading.Tasks;

public class CreateCdnKeySample
{
    public async Task<CdnKey> CreateCdnKeyAsync(
    string projectId, string location, string cdnKeyId, string hostname,
    string keyName, string privateKey, bool isMediaCdn)
    {
        // Create the client.
        VideoStitcherServiceClient client = VideoStitcherServiceClient.Create();

        CdnKey cdnKey = new CdnKey
        {
            Hostname = hostname
        };

        if (isMediaCdn)
        {
            cdnKey.MediaCdnKey = new MediaCdnKey
            {
                KeyName = keyName,
                PrivateKey = ByteString.CopyFromUtf8(privateKey)
            };
        }
        else
        {
            cdnKey.GoogleCdnKey = new GoogleCdnKey
            {
                KeyName = keyName,
                PrivateKey = ByteString.CopyFromUtf8(privateKey)
            };
        }

        CreateCdnKeyRequest request = new CreateCdnKeyRequest
        {
            ParentAsLocationName = LocationName.FromProjectLocation(projectId, location),
            CdnKeyId = cdnKeyId,
            CdnKey = cdnKey
        };

        // Make the request.
        Operation<CdnKey, OperationMetadata> response = await client.CreateCdnKeyAsync(request);

        // Poll until the returned long-running operation is complete.
        Operation<CdnKey, OperationMetadata> completedResponse = await response.PollUntilCompletedAsync();

        // Retrieve the operation result.
        return completedResponse.Result;
    }
}

Go

在試用這個範例之前，請先按照Go使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API Go API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

import (
	"context"
	"fmt"
	"io"

	stitcher "cloud.google.com/go/video/stitcher/apiv1"
	stitcherstreampb "cloud.google.com/go/video/stitcher/apiv1/stitcherpb"
)

// createCDNKey creates a CDN key. A CDN key is used to retrieve protected media.
// If isMediaCDN is true, create a Media CDN key. If false, create a Cloud
// CDN key. To create a privateKey value for Media CDN, see
// https://cloud.google.com/video-stitcher/docs/how-to/managing-cdn-keys#create-private-key-media-cdn.
func createCDNKey(w io.Writer, projectID, keyID, privateKey string, isMediaCDN bool) error {
	// projectID := "my-project-id"
	// keyID := "my-cdn-key"
	// privateKey := "my-private-key"
	// isMediaCDN := true
	location := "us-central1"
	hostname := "cdn.example.com"
	keyName := "cdn-key"
	ctx := context.Background()
	client, err := stitcher.NewVideoStitcherClient(ctx)
	if err != nil {
		return fmt.Errorf("stitcher.NewVideoStitcherClient: %w", err)
	}
	defer client.Close()

	var req *stitcherstreampb.CreateCdnKeyRequest
	if isMediaCDN {
		req = &stitcherstreampb.CreateCdnKeyRequest{
			Parent:   fmt.Sprintf("projects/%s/locations/%s", projectID, location),
			CdnKeyId: keyID,
			CdnKey: &stitcherstreampb.CdnKey{
				CdnKeyConfig: &stitcherstreampb.CdnKey_MediaCdnKey{
					MediaCdnKey: &stitcherstreampb.MediaCdnKey{
						KeyName:    keyName,
						PrivateKey: []byte(privateKey),
					},
				},
				Hostname: hostname,
			},
		}
	} else {
		req = &stitcherstreampb.CreateCdnKeyRequest{
			Parent:   fmt.Sprintf("projects/%s/locations/%s", projectID, location),
			CdnKeyId: keyID,
			CdnKey: &stitcherstreampb.CdnKey{
				CdnKeyConfig: &stitcherstreampb.CdnKey_GoogleCdnKey{
					GoogleCdnKey: &stitcherstreampb.GoogleCdnKey{
						KeyName:    keyName,
						PrivateKey: []byte(privateKey),
					},
				},
				Hostname: hostname,
			},
		}
	}

	// Creates the CDN key.
	op, err := client.CreateCdnKey(ctx, req)
	if err != nil {
		return fmt.Errorf("client.CreateCdnKey: %w", err)
	}
	response, err := op.Wait(ctx)
	if err != nil {
		return err
	}

	fmt.Fprintf(w, "CDN key: %v", response.GetName())
	return nil
}

Java

在試用這個範例之前，請先按照Java使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API Java API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

import com.google.cloud.video.stitcher.v1.CdnKey;
import com.google.cloud.video.stitcher.v1.CreateCdnKeyRequest;
import com.google.cloud.video.stitcher.v1.GoogleCdnKey;
import com.google.cloud.video.stitcher.v1.LocationName;
import com.google.cloud.video.stitcher.v1.MediaCdnKey;
import com.google.cloud.video.stitcher.v1.VideoStitcherServiceClient;
import com.google.protobuf.ByteString;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateCdnKey {

  private static final int TIMEOUT_IN_MINUTES = 2;

  public static void main(String[] args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project-id";
    String location = "us-central1";
    String cdnKeyId = "my-cdn-key-id";
    String hostname = "cdn.example.com";
    String keyName = "my-key";
    // To create a privateKey value for Media CDN, see
    // https://cloud.google.com/video-stitcher/docs/how-to/managing-cdn-keys#create-private-key-media-cdn.
    String privateKey = "my-private-key"; // will be converted to a byte string
    Boolean isMediaCdn = true;

    createCdnKey(projectId, location, cdnKeyId, hostname, keyName, privateKey, isMediaCdn);
  }

  // createCdnKey creates a Media CDN key or a Cloud CDN key. A CDN key is used to retrieve
  // protected media.
  public static CdnKey createCdnKey(
      String projectId,
      String location,
      String cdnKeyId,
      String hostname,
      String keyName,
      String privateKey,
      Boolean isMediaCdn)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests.
    try (VideoStitcherServiceClient videoStitcherServiceClient =
        VideoStitcherServiceClient.create()) {
      CdnKey cdnKey;
      if (isMediaCdn) {
        cdnKey =
            CdnKey.newBuilder()
                .setHostname(hostname)
                .setMediaCdnKey(
                    MediaCdnKey.newBuilder()
                        .setKeyName(keyName)
                        .setPrivateKey(ByteString.copyFromUtf8(privateKey))
                        .build())
                .build();
      } else {
        cdnKey =
            CdnKey.newBuilder()
                .setHostname(hostname)
                .setGoogleCdnKey(
                    GoogleCdnKey.newBuilder()
                        .setKeyName(keyName)
                        .setPrivateKey(ByteString.copyFromUtf8(privateKey))
                        .build())
                .build();
      }

      CreateCdnKeyRequest createCdnKeyRequest =
          CreateCdnKeyRequest.newBuilder()
              .setParent(LocationName.of(projectId, location).toString())
              .setCdnKeyId(cdnKeyId)
              .setCdnKey(cdnKey)
              .build();

      CdnKey result =
          videoStitcherServiceClient
              .createCdnKeyAsync(createCdnKeyRequest)
              .get(TIMEOUT_IN_MINUTES, TimeUnit.MINUTES);
      System.out.println("Created new CDN key: " + result.getName());
      return result;
    }
  }
}

Node.js

在試用這個範例之前，請先按照Node.js使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API Node.js API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

const location = 'us-central1';
const hostname = 'cdn.example.com';
const keyName = 'cdn-key';
/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// projectId = 'my-project-id';
// cdnKeyId = 'my-cdn-key';
// privateKey = 'my-private-key';

// Imports the Video Stitcher library
const {VideoStitcherServiceClient} =
  require('@google-cloud/video-stitcher').v1;
// Instantiates a client
const stitcherClient = new VideoStitcherServiceClient();

async function createCdnKey() {
  // Construct request
  const request = {
    parent: stitcherClient.locationPath(projectId, location),
    cdnKey: {
      hostname: hostname,
    },
    cdnKeyId: cdnKeyId,
  };

  if (isMediaCdn === 'true') {
    request.cdnKey.mediaCdnKey = {
      keyName: keyName,
      privateKey: privateKey,
    };
  } else {
    request.cdnKey.googleCdnKey = {
      keyName: keyName,
      privateKey: privateKey,
    };
  }

  const [operation] = await stitcherClient.createCdnKey(request);
  const [response] = await operation.promise();
  console.log(`CDN key: ${response.name}`);
}

createCdnKey().catch(err => {
  console.error(err.message);
  process.exitCode = 1;
});

PHP

在試用這個範例之前，請先按照PHP使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API PHP API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

use Google\Cloud\Video\Stitcher\V1\CdnKey;
use Google\Cloud\Video\Stitcher\V1\Client\VideoStitcherServiceClient;
use Google\Cloud\Video\Stitcher\V1\CreateCdnKeyRequest;
use Google\Cloud\Video\Stitcher\V1\GoogleCdnKey;
use Google\Cloud\Video\Stitcher\V1\MediaCdnKey;

/**
 * Creates a CDN key. Cloud CDN keys and Media CDN keys are supported.
 *
 * @param string  $callingProjectId   The project ID to run the API call under
 * @param string  $location           The location of the CDN key
 * @param string  $cdnKeyId           The ID of the CDN key to be created
 * @param string  $hostname           The hostname of the CDN key
 * @param string  $keyName            For a Media CDN key, this is the keyset name.
 *                                    For a Cloud CDN key, this is the public name of the
 *                                    CDN key.
 * @param string  $privateKey         For a Media CDN key, this is a 64-byte Ed25519 private
 *                                    key encoded as a base64-encoded string. See
 *                                    https://cloud.google.com/video-stitcher/docs/how-to/managing-cdn-keys#create-private-key-media-cdn
 *                                    for more information. For a Cloud CDN key,
 *                                    this is a base64-encoded string secret.
 * @param bool    $isMediaCdn         If true, create a Media CDN key. If false,
 *                                    create a Cloud CDN key.
 */
function create_cdn_key(
    string $callingProjectId,
    string $location,
    string $cdnKeyId,
    string $hostname,
    string $keyName,
    string $privateKey,
    bool $isMediaCdn
): void {
    // Instantiate a client.
    $stitcherClient = new VideoStitcherServiceClient();

    $parent = $stitcherClient->locationName($callingProjectId, $location);
    $cdnKey = new CdnKey();
    $cdnKey->setHostname($hostname);

    if ($isMediaCdn == true) {
        $cloudCdn = new MediaCdnKey();
        $cdnKey->setMediaCdnKey($cloudCdn);
    } else {
        $cloudCdn = new GoogleCdnKey();
        $cdnKey->setGoogleCdnKey($cloudCdn);
    }
    $cloudCdn->setKeyName($keyName);
    $cloudCdn->setPrivateKey($privateKey);

    // Run CDN key creation request
    $request = (new CreateCdnKeyRequest())
        ->setParent($parent)
        ->setCdnKey($cdnKey)
        ->setCdnKeyId($cdnKeyId);
    $operationResponse = $stitcherClient->createCdnKey($request);
    $operationResponse->pollUntilComplete();
    if ($operationResponse->operationSucceeded()) {
        $result = $operationResponse->getResult();
        // Print results
        printf('CDN key: %s' . PHP_EOL, $result->getName());
    } else {
        $error = $operationResponse->getError();
        // handleError($error)
    }
}

Python

在試用這個範例之前，請先按照Python使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API Python API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

import argparse

from google.cloud.video import stitcher_v1
from google.cloud.video.stitcher_v1.services.video_stitcher_service import (
    VideoStitcherServiceClient,
)


def create_cdn_key(
    project_id: str,
    location: str,
    cdn_key_id: str,
    hostname: str,
    key_name: str,
    private_key: str,
    is_cloud_cdn: bool,
) -> stitcher_v1.types.CdnKey:
    """Creates a Cloud CDN or Media CDN key.
    Args:
        project_id: The GCP project ID.
        location: The location in which to create the CDN key.
        cdn_key_id: The user-defined CDN key ID.
        hostname: The hostname to which this CDN key applies.
        key_name: For a Media CDN key, this is the keyset name.
                  For a Cloud CDN key, this is the public name of the CDN key.
        private_key: For a Media CDN key, this is a 64-byte Ed25519 private
                     key encoded as a base64-encoded string.
                     See https://cloud.google.com/video-stitcher/docs/how-to/managing-cdn-keys#create-private-key-media-cdn
                     for more information. For a Cloud CDN key, this is a base64-encoded string secret.
        is_cloud_cdn: If true, create a Cloud CDN key. If false, create a Media CDN key.

    Returns:
        The CDN key resource.
    """

    client = VideoStitcherServiceClient()

    parent = f"projects/{project_id}/locations/{location}"

    cdn_key = stitcher_v1.types.CdnKey(
        name=cdn_key_id,
        hostname=hostname,
    )

    if is_cloud_cdn:
        cdn_key.google_cdn_key = stitcher_v1.types.GoogleCdnKey(
            key_name=key_name,
            private_key=private_key,
        )
    else:
        cdn_key.media_cdn_key = stitcher_v1.types.MediaCdnKey(
            key_name=key_name,
            private_key=private_key,
        )

    operation = client.create_cdn_key(
        parent=parent, cdn_key_id=cdn_key_id, cdn_key=cdn_key
    )
    response = operation.result()
    print(f"CDN key: {response.name}")
    return response

Ruby

在試用這個範例之前，請先按照Ruby使用用戶端程式庫的 Video Stitcher API 快速入門中的設定說明操作。 詳情請參閱 Video Stitcher API Ruby API 參考說明文件。

如要向 Video Stitcher API 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

require "google/cloud/video/stitcher"

##
# Create a Media CDN or Cloud CDN key
#
# @param project_id [String] Your Google Cloud project (e.g. `my-project`)
# @param location [String] The location (e.g. `us-central1`)
# @param cdn_key_id [String] The user-defined CDN key ID
# @param hostname [String] The hostname to which this CDN key applies
# @param key_name [String] For a Media CDN key, this is the keyset name.
#   For a Cloud CDN key, this is the public name of the CDN key.
# @param private_key [String] For a Media CDN key, this is a 64-byte Ed25519
#   private key encoded as a base64-encoded string. See
#   https://cloud.google.com/video-stitcher/docs/how-to/managing-cdn-keys#create-private-key-media-cdn
#   for more information. For a Cloud CDN key, this is a base64-encoded string
#   secret.
# @param is_media_cdn [Boolean] If true, create a Media CDN key. If false,
#  create a Cloud CDN key.
#
def create_cdn_key project_id:, location:, cdn_key_id:, hostname:, key_name:,
                   private_key:, is_media_cdn:
  # Create a Video Stitcher client.
  client = Google::Cloud::Video::Stitcher.video_stitcher_service

  # Build the resource name of the parent.
  parent = client.location_path project: project_id, location: location
  # Build the path for the CDN key resource.
  cdn_key_path = client.cdn_key_path project: project_id, location: location,
                                     cdn_key: cdn_key_id

  # Set the CDN key fields.
  new_cdn_key = if is_media_cdn
                  {
                    name: cdn_key_path,
                    hostname: hostname,
                    media_cdn_key: {
                      key_name: key_name,
                      private_key: private_key
                    }
                  }
                else
                  {
                    name: cdn_key_path,
                    hostname: hostname,
                    google_cdn_key: {
                      key_name: key_name,
                      private_key: private_key
                    }
                  }
                end

  operation = client.create_cdn_key parent: parent, cdn_key: new_cdn_key,
                                    cdn_key_id: cdn_key_id

  # The returned object is of type Gapic::Operation. You can use this
  # object to check the status of an operation, cancel it, or wait
  # for results. Here is how to block until completion:
  operation.wait_until_done!

  # Print the CDN key name.
  puts "CDN key: #{operation.response.name}"
end

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。