开始使用

生成 Nonce

“Nonce”是由 PAL 使用 NonceLoader 生成的单个加密字符串。 PAL SDK 要求每个新的视频流请求附带新的 生成的 Nonce。不过，Nonce 可以重复用于 同一直播如需查看使用 PAL 生成 Nonce 的示例应用，请下载 GitHub 中的 HTML5 示例。

要使用 PAL SDK 生成 Nonce，请创建一个 HTML 文件并将 以下：

pal.html

<html>
<head></head>
<body>
  <div id="placeholder-video"></div>
  <button id="generate-nonce">Generate Nonce</button>
  <script src="//imasdk.googleapis.com/pal/sdkloader/pal.js"></script>
  <script src="pal.js"></script>
</body>
</html>

然后，创建一个 JavaScript 文件并添加以下内容：

pal.js

let videoElement;
let nonceLoader;
let managerPromise;
let nonceManager;
let storageConsent = true;
let playbackStarted = false;

/**
 * A placeholder for the publisher's own method of obtaining user
 * consent, either by integrating with a CMP or based on other
 * methods the publisher chooses to handle storage consent.
 * @return {boolean} Whether storage consent has been given.
 */
function getConsentToStorage() {
  return storageConsent;
}

/**
 * Initializes the PAL loader.
 */
function init() {
  const videoElement = document.getElementById('placeholder-video');
  videoElement.addEventListener('mousedown', (e) => void onVideoTouch(e));
  videoElement.addEventListener('touchstart', (e) => void onVideoTouch(e));
  videoElement.addEventListener('play', () => {
    if (!playbackStarted) {
      sendPlaybackStart();
      playbackStarted = true;
    }
  });
  videoElement.addEventListener('ended', () => void sendPlaybackEnd());
  videoElement.addEventListener('error', () => {
    console.log("Video error: " + videoElement.error.message);
    sendPlaybackEnd();
  });

  document.getElementById('generate-nonce')
      .addEventListener('click', generateNonce);

  // The default value for `allowStorage` is false, but can be
  // changed once the appropriate consent has been gathered.
  const consentSettings = new goog.pal.ConsentSettings();
  consentSettings.allowStorage = getConsentToStorage();

  nonceLoader = new goog.pal.NonceLoader(consentSettings);
}

/**
 * Generates a nonce with sample arguments and logs it to the console.
 *
 * The NonceRequest parameters set here are example parameters.
 * You should set your parameters based on your own app characteristics.
 */
function generateNonce() {
  const request = new goog.pal.NonceRequest();
  request.adWillAutoPlay = true;
  request.adWillPlayMuted = false;
  request.continuousPlayback = false;
  request.descriptionUrl = 'https://example.com';
  request.iconsSupported = true;
  request.playerType = 'Sample Player Type';
  request.playerVersion = '1.0';
  request.ppid = 'Sample PPID';
  request.sessionId = 'Sample SID';
  // Player support for VPAID 2.0, OMID 1.0, and SIMID 1.1
  request.supportedApiFrameworks = '2,7,9';
  request.url = 'https://developers.google.com/ad-manager/pal/html5';
  request.videoHeight = 480;
  request.videoWidth = 640;

  managerPromise = nonceLoader.loadNonceManager(request);
  managerPromise
      .then((manager) => {
        nonceManager = manager;
        console.log('Nonce generated: ' + manager.getNonce());
      })
      .catch((error) => {
        console.log('Error generating nonce: ' + error);
      });
}

init();

将 Nonce 附加到广告请求中

要使用生成的 Nonce，请在广告代码中附加 givn 参数和 Nonce 值。

pal.js

  /**
   * The ad tag for your ad request, for example:
   * https://pubads.g.doubleclick.net/gampad/ads?sz=640x480&iu=/124319096/external/single_ad_samples&ciu_szs=300x250&impl=s&gdfp_req=1&env=vp&output=vast&unviewed_position_start=1&cust_params=deployment%3Ddevsite%26sample_ct%3Dlinear&correlator=
   *
   * For more sample ad tags, see https://developers.google.com/interactive-media-ads/docs/sdks/html5/client-side/tags
   */
  const DEFAULT_AD_TAG = "Your ad tag";

  ...

  managerPromise = nonceLoader.loadNonceManager(request);
  managerPromise
      .then((manager) => {
        nonceManager = manager;
        console.log('Nonce generated: ' + manager.getNonce());
        
        // Append the nonce to the ad tag URL.
        makeAdRequest(DEFAULT_AD_TAG + "&givn=" + nonceString);
      })

跟踪播放事件

最后，您需要为播放器实现各种事件处理脚本。对于 您可以将这些对象附加到按钮点击事件中， 将由相应的播放器事件触发：

pal.js

/**
 * Informs PAL that an ad click has occurred. How this function is
 * called will vary depending on your ad implementation.
 */
function sendAdClick() {
  nonceManager?.sendAdClick();
}

/**
 * Handles the user touching on the video element, passing it to PAL.
 * @param {!TouchEvent|!MouseEvent} touchEvent
 */
function onVideoTouch(touchEvent) {
  nonceManager?.sendAdTouch(touchEvent);
}

/** Informs PAL that playback has started. */
function sendPlaybackStart() {
  nonceManager?.sendPlaybackStart();
}

/** Informs PAL that playback has ended. */
function sendPlaybackEnd() {
  nonceManager?.sendPlaybackEnd();
}

在你的实现中，在播放视频后应调用 sendPlaybackStart 开始播放。执行视频操作后，应调用 sendPlaybackEnd。 结束播放会话。每次调用 sendAdClick 观看者点击广告。每次发生轻触互动时都应调用 sendAdTouch 与玩家互动

（可选）通过第三方广告服务器发送 Google Ad Manager 信号

配置第三方广告服务器向 Ad Manager 发出的请求。

配置您的第三方广告服务器，以在该服务器的 向 Ad Manager 发送广告请求下面是在 第三方广告服务器：

'https://pubads.serverside.net/gampad/ads?givn=%%custom_key_for_google_nonce%%&...'

有关详情，请参阅 Google Ad Manager 服务器端实施 指南。

Ad Manager 会查找 givn= 以标识 Nonce 值。第三方广告 服务器需要支持自己的某个宏，例如 %%custom_key_for_google_nonce%%，并将其替换为 Nonce 查询参数 您在上一步中提供的 ID。详细了解如何实现这一目标 。

大功告成！现在，您应该已经从 PAL SDK 传播了 Nonce 参数， 然后将数据传输到 Google Ad Manager这样一来， 获得更高收益