(Delphi ActiveX) SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment.

For more information, see https://sendgrid.com/docs/for-developers/sending-email/curl-examples/#sending-a-basic-email-with-attachment

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
http: TChilkatHttp;
success: Integer;
json: TChilkatJsonObject;
bd: TChilkatBinData;
resp: IChilkatHttpResponse;
respStatusCode: Integer;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl --request POST \
//   --url https://api.sendgrid.com/v3/mail/send \
//   --header 'authorization: Bearer YOUR_API_KEY' \
//   --header 'Content-Type: application/json' \
//   --data '{"personalizations": [{"to": [{"email": "recipient@example.com"}]}],"from": {"email": "sender@example.com"},"subject":"Hello, World!","content": [{"type": "text/html","value": "Hey,<br>Please find attachment."}], "attachments": [{"content": "BASE64_ENCODED_CONTENT", "type": "text/plain", "filename": "attachment.txt"}]}'

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "personalizations": [
//     {
//       "to": [
//         {
//           "email": "recipient@example.com"
//         }
//       ]
//     }
//   ],
//   "from": {
//     "email": "sender@example.com"
//   },
//   "subject": "Hello, World!",
//   "content": [
//     {
//       "type": "text/html",
//       "value": "Hey,<br>Please find attachment."
//     }
//   ],
//   "attachments": [
//     {
//       "content": "BASE64_ENCODED_CONTENT",
//       "type": "text/plain",
//       "filename": "attachment.txt"
//     }
//   ]
// }

json := TChilkatJsonObject.Create(Self);
json.UpdateString('personalizations[0].to[0].email','recipient@example.com');
json.UpdateString('from.email','sender@example.com');
json.UpdateString('subject','Hello, World!');
json.UpdateString('content[0].type','text/html');
json.UpdateString('content[0].value','Hey,<br>Please find attachment.');

// Load a file to be attached.
bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/pdf/hello.pdf');

json.UpdateString('attachments[0].content',bd.GetEncoded('base64'));
json.UpdateString('attachments[0].type','application/pdf');
json.UpdateString('attachments[0].filename','hello.pdf');

http.SetRequestHeader('Content-Type','application/json');
// Adds the "Authorization: Bearer YOUR_API_KEY" header.
http.AuthToken := 'YOUR_API_KEY';

resp := http.PostJson3('https://api.sendgrid.com/v3/mail/send','application/json',json.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

respStatusCode := resp.StatusCode;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 202) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(resp.Header);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(resp.BodyStr);
    Memo1.Lines.Add('Failed.');

    Exit;
  end;

Memo1.Lines.Add('Success.');
end;