"Unexpected character encountered" Newtonsoft.Json 读取 GCP 授权文件

Question

我正在尝试获取必须连接到 GCP (Bigquery) 的本地 c# 程序。我从 GCP 获得了一个凭证 json 文件，它看起来像：

{
  "type": "service_account",
  "project_id": "project-id-1",
  "private_key_id": "veryprivatekeything",
  "private_key": "-----BEGIN PRIVATE KEY-----\nmany_letters_and_symbols_here\n-----END PRIVATE KEY-----\n",
  "client_email": "bq-access-for-test@project-id-1.iam.gserviceaccount.com",
  "client_id": "1234567891011",
  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
  "token_uri": "https://oauth2.googleapis.com/token",
  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/bq-access-for-test%40project-id-1.iam.gserviceaccount.com"
}

我的代码类似于：

  string path2key = "C:/Users/me/Downloads/project-id-1-letters.json";

  byte[] jsonBytes = File.ReadAllBytes(path2key);

// I also tried another encoding but same deal
// string jsonString = Encoding.UTF32.GetString(jsonBytes); 
  string jsonString = File.ReadAllText(path2key);
  Console.WriteLine(jsonString);

// This is where the error is
  string jsonStringDeserialized = JsonConvert.DeserializeObject<string>(jsonString);
  Console.WriteLine(jsonStringDeserialized);

// I presume I'm passing json as a string???
  var credential = GoogleCredential.FromJson(jsonStringDeserialized);
  if (credential.IsCreateScopedRequired)
  {
     credential = credential.CreateScoped(new[]
     {
        BigqueryService.Scope.Bigquery
     });
  }
  Console.WriteLine("Credentials Created");

  var client = BigQueryClient.Create("projectId", credential);
  Console.WriteLine("Client Created");
  var table = client.GetTable("bigquery-public-data", "samples", "shakespeare");
  var sql = 
      $"  SELECT corpus AS title" +
      $"      , COUNT(word) AS unique_words " +
      $"  FROM {table} " +
      $"  GROUP BY title " +
      $"  ORDER BY unique_words DESC " +
      $"  LIMIT 10"
   ;

  var results = client.ExecuteQuery(sql, parameters: null);

  foreach (var row in results)
  {
     Console.WriteLine($"{row["title"]}: {row["unique_words"]}");
  }

然而，当我到达试图反序列化 jsonString 的行时，它抱怨说

Newtonsoft.Json.JsonReaderException: 'Unexpected character encountered while parsing value: {. Path '', line 1, position 1.'

我假设 json 没有格式错误，因为它是直接从 GCP 下载的，我已经用 linters 检查它是否有效。接下来我应该尝试什么？

Answer 1

您不需要此代码，它不会创建任何东西，除了错误

  string jsonStringDeserialized = JsonConvert.DeserializeObject<string>(jsonString);
  Console.WriteLine(jsonStringDeserialized);

试试这个

 string jsonString = File.ReadAllText(path2key);
  var credential = GoogleCredential.FromJson(jsonString);
 .... your code

"Unexpected character encountered" Newtonsoft.Json 读取 GCP 授权文件

"Unexpected character encountered" with Newtonsoft.Json reading GCP auth file

c#

json

google-cloud-platform