使用 Apps 脚本 URLFetchApp 访问 Google 数据存储区数据

Question

我想通过 Apps 脚本试验 Google 数据存储，因为我有一个基于 Google 工作表的当前解决方案，运行解决了不断处理云端硬盘文件所固有的超时问题.我在 Google 云中使用服务帐户和启用的库创建了一个测试项目 MZx5DzNPsYjVyZaR67xXJQai_d-phDA33 (cGoa) 来处理 Oauth2 工作。我按照指南启动了它 here 并得到了所有相关的确认，它可以与我的令牌一起使用（并且删除令牌会引发 'authentication failed prompt'）。

现在我想从一个基本查询开始，以显示我已经放入的一个实体。我可以使用 API Explorer here 和运行这个查询主体：

{
   "query": {}
}

得到这个结果：

{
 "batch": {
"entityResultType": "FULL",
"entityResults": [
  {
    "entity": {
      "key": {
        "partitionId": {
          "projectId": "project-id-5200707333336492774"
        },
        "path": [
          {
            "kind": "Transaction",
            "id": "5629499534213120"
          }
        ]
      },
      "properties": {
        "CommentIn": {
          "stringValue": "My First Test Transaction"
        },
        "Status": {
          "stringValue": "Closed"
        },
        "auditStatus": {
          "stringValue": "Logged"
        },
        "User": {
          "stringValue": "John Doe"
        },
        "Start": {
          "timestampValue": "2017-08-17T18:07:04.681Z"
        },
        "CommentOut": {
          "stringValue": "Done for today!"
        },
        "End": {
          "timestampValue": "2017-08-17T20:07:38.058Z"
        },
        "Period": {
          "stringValue": "08/16/2017-08/31/2017"
        }
      }
    },
    "cursor": "CkISPGogc35whh9qZWN0LWlkLTUyMDA3MDcwODA1MDY0OTI3NzRyGAsSC1RyYW5zYWN0aW9uGICAgICAgIAKDBgAIAA=",
    "version": "1503004124243000"
  }
],
"endCursor": "CkISPGogc35wcm9qZWN0LWlkLTUyMDAxxDcwODA1MDY0OTI3NzRyGAsSC1RyYW5zYWN0aW9uGICAgICAgIAKDBgAIAA=",
"moreResults": "NO_MORE_RESULTS"
 }
}

我尝试用这段代码做同样的事情：

 function doGet(e)
  {
   var goa = cGoa.GoaApp.createGoa('Oauth2-Service-Account',

  PropertiesService.getScriptProperties()).execute(e);
    if(goa.hasToken()) {var token = goa.getToken();}

      var payload = {"query":{}}
            ; 

        var result = UrlFetchApp.fetch('https://datastore.googleapis.com/v1/projects/project-id-5200707333336492774:runQuery', 
                     {
                      method: "POST", 
                       headers: {authorization: "Bearer " + goa.getToken()}, 
         muteHttpExceptions : true,
                       payload: payload
                     });



        Logger.log(result.getBlob().getDataAsString());
          }

并在记录器中得到这个错误：

   "error": {
     "code": 400,
     "message": "Invalid JSON payload received. Unknown name \"query\": Cannot bind query parameter. 'query' is a message type. Parameters can only be bound to primitive types.",
     "status": "INVALID_ARGUMENT",
     "details": [
       {
         "@type": "type.googleapis.com/google.rpc.BadRequest",
         "fieldViolations": [
           {
             "description": "Invalid JSON payload received. Unknown name \"query\": Cannot bind query parameter. 'query' is a message type. Parameters can only be bound to primitive types."
           }
         ]
       }
     ]
   }
 }

如果我尝试使用另一个词，例如 'resource' 或 'GqlQuery'，我会收到此错误：

  "error": {
     "code": 400,
     "message": "Invalid JSON payload received. Unknown name \"GqlQuery\": Cannot bind query parameter. Field 'GqlQuery' could not be found in request message.",
     "status": "INVALID_ARGUMENT",
     "details": [
       {
         "@type": "type.googleapis.com/google.rpc.BadRequest",
         "fieldViolations": [
           {
             "description": "Invalid JSON payload received. Unknown name \"GqlQuery\": Cannot bind query parameter. Field 'GqlQuery' could not be found in request message."
           }
         ]
       }
     ]
   }
 }

我无法从 API 文档中得知我的语法应该是什么。谁能告诉我如何将功能请求正文从 Apps 脚本编译到 Datastore？

Answer 1

您需要设置负载的 contentType 并按如下方式对 JSON 负载进行字符串化：

var result = UrlFetchApp.fetch(
    'https://datastore.googleapis.com/v1/projects/project-id-5200707333336492774:runQuery',
    {
        'method':'post',
        'contentType':'application/json',
        'headers': {authorization: "Bearer " + goa.getToken()},
        'payload':JSON.stringify(payload)
    }
);

使用 Apps 脚本 URLFetchApp 访问 Google 数据存储区数据

Use Apps Script URLFetchApp to access Google Datastore Data

urlfetch

google-apps-script

oauth-2.0

google-cloud-datastore