Pascal (Lazarus/Delphi)

Insert Email into GMail Folder

See more GMail REST API Examples

Directly inserts a message into only this user's mailbox similar to IMAP APPEND, bypassing most scanning and classification. Does not send a message.

This example will create a Chilkat Email object and upload/insert it into GMail. Then adds the "INBOX" label to the email to make it appear in INBOX

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.Email,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  sbMime: TStringBuilder;
  http: THttp;
  resp: THttpResponse;
  url: string;
  json: TJsonObject;
  id: string;
  json2: TJsonObject;

begin
  success := False;

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

  email := TEmail.Create;

  //  This example chooses to load an email from a file.
  success := email.LoadEml('qa_data/eml/testEmail.eml');
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Get the email as MIME.
  sbMime := TStringBuilder.Create;
  email.GetMimeSb(sbMime);

  http := THttp.Create;
  resp := THttpResponse.Create;

  http.AuthToken := 'GMAIL-ACCESS-TOKEN';

  //  Upload to GMail (does not send, but just inserts).

  //  IMPORTANT: After uploading/inserting, you won't see the message in the Inbox.
  //  In your web browser, if you go to "All Mail", you will see it.

  url := 'https://www.googleapis.com/upload/gmail/v1/users/me/messages?uploadType=media';
  http.UncommonOptions := 'SendGzipped';
  success := http.HttpSb('POST',url,sbMime,'utf-8','message/rfc822',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;
  http.UncommonOptions := '';

  //  A status code of 200 indicates success.
  WriteLn('Response status code: ' + resp.StatusCode);
  WriteLn('Response body:');
  WriteLn(resp.BodyStr);

  //  The response body contains JSON.
  //  A sample successful JSON response:

  //  {
  //   "id": "166f583051d36144",
  //   "threadId": "166f5529e079a456"
  //  }

  json := TJsonObject.Create;
  json.Load(resp.BodyStr);
  id := json.StringOf('id');

  //  Add the Inbox label to the inserted email so that it appears in Inbox.
  WriteLn('---- Adding the Inbox label to the newly inserted email. ----');

  //  Create the following JSON to be sent in a POST to modify labels for this message.
  //  {
  //    "addLabelIds": [
  //      "INBOX"
  //      ]
  //  }

  json2 := TJsonObject.Create;
  json2.UpdateString('addLabelIds[0]','INBOX');

  http.SetUrlVar('id',id);
  url := 'https://www.googleapis.com/gmail/v1/users/me/messages/{$id}/modify';

  success := http.HttpJson('POST',url,json2,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  A status code of 200 indicates success.
  WriteLn('Response status code: ' + resp.StatusCode);
  WriteLn('Response body:');
  WriteLn(resp.BodyStr);

  //  The response body contains JSON.
  //  A sample successful JSON response:

  //  {
  //   "id": "166f583051d36144",
  //   "threadId": "166f583051d36144",
  //   "labelIds": [
  //    "INBOX"
  //   ]
  //  }


  email.Free;
  sbMime.Free;
  http.Free;
  resp.Free;
  json.Free;
  json2.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.