Pascal (Lazarus/Delphi)

SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment. 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.BinData,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  json: TJsonObject;
  bd: TBinData;
  resp: THttpResponse;
  respStatusCode: Integer;

begin
  success := False;

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

  http := THttp.Create;

  //  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 := TJsonObject.Create;
  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 := TBinData.Create;
  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');

  //  Adds the "Authorization: Bearer YOUR_API_KEY" header.
  http.AuthToken := 'YOUR_API_KEY';

  resp := THttpResponse.Create;
  success := http.HttpJson('POST','https://api.sendgrid.com/v3/mail/send',json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode <> 202) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Response Body:');
      WriteLn(resp.BodyStr);
      WriteLn('Failed.');
      Exit;
    end;
  WriteLn('Success.');


  http.Free;
  json.Free;
  bd.Free;
  resp.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.