Pascal (Lazarus/Delphi)

Create a Google Cloud Storage Bucket

See more Google Cloud Storage Examples

Demonstrates how to create a Google Cloud Storage bucket. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.HttpResponse,
  Chilkat.JsonObject,
  Chilkat.CkDateTime;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  sbToken: TStringBuilder;
  json: TJsonObject;
  http: THttp;
  url: string;
  resp: THttpResponse;
  responseCode: Integer;
  jsonResp: TJsonObject;
  dt: TCkDateTime;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  This example uses a previously obtained access token having permission for the 
  //  scope "https://www.googleapis.com/auth/cloud-platform"

  //  In this example, Get Google Cloud Storage OAuth2 Access Token, 
  //  the service account access token was saved to a text file.  This example fetches the access token from the file..
  sbToken := TStringBuilder.Create;
  sbToken.LoadFile('qa_data/tokens/googleCloudStorageAccessToken.txt','utf-8');

  //  ---- Step 1
  //  Create a JSON that contains the following information, replacing [VALUES_IN_BRACKETS] with the appropriate values:

  //  {
  //    "name": "[BUCKET_NAME]",
  //    "location": "[BUCKET_LOCATION]",
  //    "storageClass": "[STORAGE_CLASS]"
  //  }

  json := TJsonObject.Create;
  json.UpdateString('name','chilkat-ocean');
  json.UpdateString('location','us');
  json.UpdateString('storageClass','multi_regional');

  //  ---- Step 2
  //  Send a POST equivalent to this curl command

  //  curl -X POST --data-binary @[JSON_FILE_NAME].json \
  //       -H "Authorization: Bearer [OAUTH2_TOKEN]" \
  //       -H "Content-Type: application/json" \
  //       "https://www.googleapis.com/storage/v1/b?project=[PROJECT_ID]"

  http := THttp.Create;
  http.AuthToken := sbToken.GetAsString();

  http.SetUrlVar('project_id','chilkat-176611');
  url := 'https://www.googleapis.com/storage/v1/b?project={$project_id}';
  resp := THttpResponse.Create;
  success := http.HttpJson('POST',url,json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  responseCode := resp.StatusCode;
  if (responseCode = 401) then
    begin
      WriteLn(resp.BodyStr);
      WriteLn('If invalid credentials, then it is likely the access token expired.');
      WriteLn('Your app should automatically fetch a new access token and re-try.');
      Exit;
    end;

  WriteLn('Response code: ' + responseCode);
  WriteLn('Response body');
  WriteLn(resp.BodyStr);

  //  A successful response looks like this:
  //  Response code: 200
  //  Response body
  //  {
  //   "kind": "storage#bucket",
  //   "id": "chilkat-ocean",
  //   "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean",
  //   "projectNumber": "933037264567",
  //   "name": "chilkat-ocean",
  //   "timeCreated": "2017-08-13T12:27:10.811Z",
  //   "updated": "2017-08-13T12:27:10.811Z",
  //   "metageneration": "1",
  //   "location": "US",
  //   "storageClass": "MULTI_REGIONAL",
  //   "etag": "CAE="
  //  }
  //  

  //  Parse the JSON response:
  jsonResp := TJsonObject.Create;
  jsonResp.Load(resp.BodyStr);

  WriteLn('name: ' + jsonResp.StringOf('name'));
  WriteLn('timeCreated: ' + jsonResp.StringOf('timeCreated'));

  //  Parse the date/time created.
  dt := TCkDateTime.Create;
  dt.SetFromTimestamp(jsonResp.StringOf('timeCreated'));
  //  ...


  sbToken.Free;
  json.Free;
  http.Free;
  resp.Free;
  jsonResp.Free;
  dt.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.