Google Drive Web APIサービスの設定

To configure Google Drive Web API Service and perform different operations, follow these steps:

Configure Storage Connection String
Register the Cloud Service
Perform Operations

Step 1: Configure Storage Connection String

Create Google API and get the credentials.json file to your project. For more information on Google Drive API, see Configure your UI integration.

Step 2: Register the Cloud Service

Create a new C1 Web API Application and make sure the following references are added to the application:
- C1.Web.Api.dll
- C1.Web.Api.Cloud.dll
Add the "credentials.json" credential file to the project.
Install Google.Apis.Drive.v3 NuGet package from the NuGet Package Manager.

Create a method, say GetUserCredential, to get the credentials from credentials.json file using the following code:

Code	コードのコピー
using Google.Apis.Auth.OAuth2; private UserCredential GetUserCredential(string[] scopes) { UserCredential credential; using (var fileStream = new FileStream(HttpContext.Current.Server.MapPath("credentials.json"), FileMode.Open, FileAccess.Read)) { string credPath = "token.json"; credential = GoogleWebAuthorizationBroker.AuthorizeAsync( GoogleClientSecrets.Load(fileStream).Secrets, scopes, "user", CancellationToken.None, new FileDataStore(HttpContext.Current.Server.MapPath(credPath), true)).Result; } return credential; }

Code

コードのコピー

using Google.Apis.Auth.OAuth2; 

private UserCredential GetUserCredential(string[] scopes) 
        { 
            UserCredential credential; 

            using (var fileStream = 
                    new FileStream(HttpContext.Current.Server.MapPath("credentials.json"), FileMode.Open, FileAccess.Read)) 
            { 
                string credPath = "token.json"; 
                credential = GoogleWebAuthorizationBroker.AuthorizeAsync( 
                        GoogleClientSecrets.Load(fileStream).Secrets, 
                        scopes, 
                        "user", 
                        CancellationToken.None, 
                        new FileDataStore(HttpContext.Current.Server.MapPath(credPath), true)).Result; 
            } 
            return credential; 
        }

Note that the file token.json stores the user's access and refreshes tokens, and is created automatically when the authorization flow completes for the first time.

Code	コードのコピー
using Google.Apis.Drive.v3; string[] scopes = { DriveService.Scope.Drive }; string applicationName = "yout application name"; app.UseStorageProviders().AddGoogleDriveStorage("GoogleDrive", GetUserCredential(scopes), applicationName);

Code

コードのコピー

using Google.Apis.Drive.v3; 
   string[] scopes = { DriveService.Scope.Drive }; 
   string applicationName = "yout application name"; 
   app.UseStorageProviders().AddGoogleDriveStorage("GoogleDrive", GetUserCredential(scopes), applicationName);

Step 3: Perform Operations

You can choose to perform various operations, such as listing data, uploading, deleting or downloading a file, after registering the cloud service. To understand how to perform these operations, see Perform Operations.