Lazarus Pascal
Mailgun Send Send HTML Email with Attachments and HTML Images

Sends an HTML email with images and attachments.
Chilkat Lazarus Pascal Downloads

Lazarus Pascal
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.HttpResponse,
  Chilkat.JsonObject,
  Chilkat.StringBuilder,
  Chilkat.BinData,
  Chilkat.HttpRequest;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  req: THttpRequest;
  bd: TBinData;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  id: string;
  message: string;

begin
  success := False;

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

  http := THttp.Create;

  http.Login := 'api';
  http.Password := 'sending_api_key';  //  Replace with your actual sending API key.

  req := THttpRequest.Create;
  req.HttpVerb := 'POST';
  req.Path := '/v3/YOUR_DOMAIN_NAME/messages';
  req.ContentType := 'multipart/form-data';

  //  Change YOUR_DOMAIN_NAME to something like "mg.your-domain.com".
  req.AddParam('from','Your Name <mailgun@YOUR_DOMAIN_NAME>');
  req.AddParam('to','Joe Example <joe@example.com>');
  req.AddParam('subject','Hello Joe Example');
  req.AddParam('html','<html><body><b>This is the HTML body</b><br><img src="cid:cidStarfish.jpg"></body></html>');

  //  An a attachd file
  bd := TBinData.Create;
  success := bd.LoadFile('qa_data/hamlet.zip');
  if (success = False) then
    begin
      WriteLn('Failed to load file attachment.');
      Exit;
    end;
  req.AddBdForUpload('attachment','hamlet.zip',bd,'application/zip');

  //  add an image as CID
  success := bd.LoadFile('qa_data/jpg/starfish.jpg');
  if (success = False) then
    begin
      WriteLn('Failed to load HTML image.');
      Exit;
    end;
  req.AddBdForUpload('inline','cidStarfish.jpg',bd,'image/jpeg');

  resp := THttpResponse.Create;
  success := http.HttpSReq('api.mailgun.net',443,True,req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Sample JSON response:
  //  (Sample code for parsing the JSON response is shown below)

  //  {
  //    "id": "<20210429234809.1.2D550E1C94D3D98F@sandbox0e542e4c577f4bbb98c8bf6b6bca727b.mailgun.org>",
  //    "message": "Queued. Thank you."
  //  }

  //  Sample code for parsing the JSON response...
  //  Use the following online tool to generate parsing code from sample JSON:
  //  Generate Parsing Code from JSON

  id := jResp.StringOf('id');
  message := jResp.StringOf('message');


  http.Free;
  req.Free;
  bd.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.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.