(Delphi ActiveX) Send GMail with Attachments

Demonstrates how to send an email containing attachments using the GMail REST API.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads

Chilkat ActiveX DLL for Delphi

Chilkat non-ActiveX DLL for Delphi

* The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
email: TChilkatEmail;
cid: WideString;
sbHtml: TChilkatStringBuilder;
numReplacements: Integer;
mimeType: WideString;
sbMime: TChilkatStringBuilder;
http: TChilkatHttp;
url: WideString;
sendGzipped: Integer;
resp: TChilkatHttpResponse;

begin
success := 0;

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

// Use the Chilkat Email API to create or load an email.
email := TChilkatEmail.Create(Self);

// The From name/address don't need to be specified. 
// GMail will automatically use your Gmail address if the following 2 lines are omitted.
email.FromName := 'My Name';
email.FromAddress := 'my_account_name@gmail.com';

email.AddTo('John Smith','somebody@somewhere.com');
// To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

email.Subject := 'This is a test GMail email created using Chilkat.';
email.Charset := 'utf-8';
email.AddPlainTextAlternativeBody('This is a test');

// Create an HTML email body with an embedded image.
cid := email.AddRelatedFile('qa_data/jpg/starfish.jpg');
sbHtml := TChilkatStringBuilder.Create(Self);
sbHtml.Append('<html><body>This is a <b>test</b><br><img src="cid:STARFISH_CID"/></body></html>');
numReplacements := sbHtml.Replace('STARFISH_CID',cid);

email.AddHtmlAlternativeBody(sbHtml.GetAsString());

// Add some attachments..
mimeType := email.AddFileAttachment('qa_data/helloWorld.pdf');
if (email.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add('Failed to add PDF attachment.');
    Exit;
  end;
mimeType := email.AddFileAttachment('qa_data/msword/sample2.docx');
if (email.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add('Failed to add MS-Word attachment.');
    Exit;
  end;

// OK.. we now have an HTML email with 2 attachments..
sbMime := TChilkatStringBuilder.Create(Self);
email.GetMimeSb(sbMime.ControlInterface);

// Send the email.  (GMail has a 5MB limit on the total email size.)
http := TChilkatHttp.Create(Self);
http.AuthToken := 'GMAIL-ACCESS-TOKEN';

// Send using the simple upload request for the Gmail API
url := 'https://www.googleapis.com/upload/gmail/v1/users/me/messages/send?uploadType=media';
sendGzipped := 1;

resp := TChilkatHttpResponse.Create(Self);
success := http.HttpSb('POST',url,sbMime.ControlInterface,'utf-8','message/rfc822',resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// A status code of 200 indicates success.
Memo1.Lines.Add('Response status code: ' + IntToStr(resp.StatusCode));
Memo1.Lines.Add('Response body:');
Memo1.Lines.Add(resp.BodyStr);

// The response body contains JSON.
// Use the online tool at Generate JSON Parsing Code
// to generate JSON parsing code.

// A sample successful JSON response:

// {
//  "id": "166f0d4ac39e50bf",
//  "threadId": "166f0d4ac39e50bf",
//  "labelIds": [
//   "SENT"
//  ]
// }
end;