403 错误消息“Google Slides API 尚未在项目中使用......之前或已被禁用”

Question

我正在尝试从 Google 表格生成 Google 幻灯片；使用 Sheets 脚本没有问题，但是当我尝试包含 Google 幻灯片时，在验证并获得 Oauth 权限提示后，我收到了这个错误，我找不到任何参考；我已确保在 Developers Console 中启用了 Google Slides API 和 Drive API。

“https://slides.googleapis.com/v1/presentations/ 的请求失败...返回代码 403。截断的服务器响应：{“错误”：{“代码”：403，“消息”：“项目项目 ID 中未使用 Google 幻灯片 API -...之前或者它被禁用...（使用 muteHttpExceptions 选项检查完整响应）（第 93 行，文件“代码”）”

失败的代码如下，失败的函数是从How to download Google Slides as images?复制的。客户端 ID 和机密已定义，仅出于安全考虑而省略

// from https://mashe.hawksey.info/2015/10/setting-up-oauth2-access-with-google-apps-script-blogger-api-example/

function getService() {
  // Create a new service with the given name. The name will be used when
  // persisting the authorized token, so ensure it is unique within the
  // scope of the property store.
  return OAuth2.createService('slidesOauth')

      // Set the endpoint URLs, which are the same for all Google services.
      .setAuthorizationBaseUrl('https://accounts.google.com/o/oauth2/auth')
      .setTokenUrl('https://accounts.google.com/o/oauth2/token')


      // Set the client ID and secret, from the Google Developers Console.
      .setClientId(CLIENT_ID)
      .setClientSecret(CLIENT_SECRET)

      // Set the name of the callback function in the script referenced
      // above that should be invoked to complete the OAuth flow.
      .setCallbackFunction('authCallback')

      // Set the property store where authorized tokens should be persisted.
      .setPropertyStore(PropertiesService.getUserProperties())

      // Set the scopes to request (space-separated for Google services).
      // this is blogger read only scope for write access is:
      // https://www.googleapis.com/auth/blogger
      .setScope('https://www.googleapis.com/auth/blogger.readonly')

      // Below are Google-specific OAuth2 parameters.

      // Sets the login hint, which will prevent the account chooser screen
      // from being shown to users logged in with multiple accounts.
      .setParam('login_hint', Session.getActiveUser().getEmail())

      // Requests offline access.
      .setParam('access_type', 'offline')

      // Forces the approval prompt every time. This is useful for testing,
      // but not desirable in a production application.
      .setParam('approval_prompt', 'force');
}

function authCallback(request) {
  var oauthService = getService();
  var isAuthorized = oauthService.handleCallback(request);
  if (isAuthorized) {
    return HtmlService.createHtmlOutput('Success! You can close this tab.');
  } else {
    return HtmlService.createHtmlOutput('Denied. You can close this tab');
  }
}

// from https://stackoverflow.com/questions/31662455/how-to-download-google-slides-as-images/40678925#40678925

function downloadPresentation(id) {
  var slideIds = getSlideIds(id); 

  for (var i = 0, slideId; slideId = slideIds[i]; i++) {
    downloadSlide('Slide ' + (i + 1), id, slideId);
  }
}
function downloadSlide(name, presentationId, slideId) {
  var url = 'https://docs.google.com/presentation/d/' + presentationId +
    '/export/png?id=' + presentationId + '&pageid=' + slideId; 
  var options = {
    headers: {
      Authorization: 'Bearer ' + getService().getAccessToken()
    }
  };
  var response = UrlFetchApp.fetch(url, options); // This is the failing line 93
  var image = response.getAs(MimeType.PNG);
  image.setName(name);
  DriveApp.createFile(image);
}

Answer 1

编辑： 我用这个代码 sn-p 得到了这个：

var CLIENT_ID = '...';
var CLIENT_SECRET = '...';
var PRESENTATION_ID = '...';

// from https://mashe.hawksey.info/2015/10/setting-up-oauth2-access-with-google-apps-script-blogger-api-example/

function getService() {
  // Create a new service with the given name. The name will be used when
  // persisting the authorized token, so ensure it is unique within the
  // scope of the property store.
  return OAuth2.createService('slidesOauth')

      // Set the endpoint URLs, which are the same for all Google services.
      .setAuthorizationBaseUrl('https://accounts.google.com/o/oauth2/auth')
      .setTokenUrl('https://accounts.google.com/o/oauth2/token')


      // Set the client ID and secret, from the Google Developers Console.
      .setClientId(CLIENT_ID)
      .setClientSecret(CLIENT_SECRET)

      // Set the name of the callback function in the script referenced
      // above that should be invoked to complete the OAuth flow.
      .setCallbackFunction('authCallback')

      // Set the property store where authorized tokens should be persisted.
      .setPropertyStore(PropertiesService.getUserProperties())

      // Set the scopes to request (space-separated for Google services).
      .setScope('https://www.googleapis.com/auth/drive')

      // Below are Google-specific OAuth2 parameters.

      // Sets the login hint, which will prevent the account chooser screen
      // from being shown to users logged in with multiple accounts.
      .setParam('login_hint', Session.getActiveUser().getEmail())

      // Requests offline access.
      .setParam('access_type', 'offline')

      // Forces the approval prompt every time. This is useful for testing,
      // but not desirable in a production application.
      .setParam('approval_prompt', 'force');
}

function authCallback(request) {
  var oauthService = getService();
  var isAuthorized = oauthService.handleCallback(request);
  if (isAuthorized) {
    return HtmlService.createHtmlOutput('Success! You can close this tab.');
  } else {
    return HtmlService.createHtmlOutput('Denied. You can close this tab');
  }
}

function getSlideIds(presentationId) {
  var url = 'https://slides.googleapis.com/v1/presentations/' + presentationId;
  var options = {
    headers: {
      Authorization: 'Bearer ' + getService().getAccessToken()
    }
  };
  var response = UrlFetchApp.fetch(url, options);

  var slideData = JSON.parse(response);
  return slideData.slides.map(function(slide) {
    return slide.objectId;
  });
}


// from http://stackoverflow.com/questions/31662455/how-to-download-google-slides-as-images/40678925#40678925

function downloadPresentation(id) {
  var slideIds = getSlideIds(id); 

  for (var i = 0, slideId; slideId = slideIds[i]; i++) {
    downloadSlide('Slide ' + (i + 1), id, slideId);
  }
}

function downloadSlide(name, presentationId, slideId) {
  var url = 'https://docs.google.com/presentation/d/' + presentationId +
    '/export/png?id=' + presentationId + '&pageid=' + slideId; 
  var options = {
    headers: {
      Authorization: 'Bearer ' + getService().getAccessToken()
    }
  };
  var response = UrlFetchApp.fetch(url, options); // This is the failing line 93
  var image = response.getAs(MimeType.PNG);
  image.setName(name);
  DriveApp.createFile(image);
}

function start() {
  var service = getService();
  var authorizationUrl = service.getAuthorizationUrl();
  Logger.log('Open the following URL and re-run the script: %s',
      authorizationUrl);

  if (service.hasAccess()) {
    downloadPresentation(PRESENTATION_ID);
  }
}

我猜客户端 ID 和密码并非来自您认为它们来自的项目。您可以通过访问 your project's credentials page 并查看“OAuth 2.0 客户端 ID”下是否列出了匹配的客户端 ID 来验证这一点。包含该客户端 ID 的项目需要启用 Slides API。

另请注意：您使用的 /export/png 端点不是已记录/支持的 Google API，因此将来可能会被重命名或损坏。如果您对通过 Slides API 获取渲染的 PNG 幻灯片的官方 API 感兴趣，请关注此issue on the tracker。

---

以前的内容：

您的代码也与您从中复制的 sn-p 略有不同。它使用ScriptApp.getOAuthToken() 来获取授权标头的值，但您正在调用不同的getService().getAccessToken() 函数。看起来您正在使用 apps-script-oauth2 库来生成 OAuth 令牌。如果是这种情况，请确认在生成您传递给OAuth2.createService 的 clientId 和客户端密码的开发者控制台项目上启用了 Slides API，因为它不一定与附加到您的脚本的项目相同。如果您可以选择切换到ScriptApp.getOAuthToken()，那也可以。

如果这不能解决您的问题，介意提供更多代码吗？您粘贴的 sn-p 似乎与错误消息不匹配，因为您的代码似乎正在向 docs.google.com 发出请求，而不是错误中提到的 slides.googleapis.com。

Answer 2

解决方案的简短版本：感谢 Maurice Codik 的努力，我的代码和他的代码都能正常工作。

问题在于 OAuth 凭据中的授权重定向 URI 设置，必须设置为

https://script.google.com/macros/d/[ScriptID]/usercallback

Answer 3

这不是对 OP 问题的直接回答，而是直接解决了他们第一句话的第一部分，即“我正在尝试从 Google 表格生成 Google 幻灯片......”这是确切的用例我为它创建了一个video (and accompanying blog post[s])。注意：帖子中的有效负载是 JSON，但视频中的完整示例是 Python，因此非 Python 开发人员可以简单地将其用作伪代码。）