Delphi DLL

Mailgun Send Simple Email

See more Mailgun Examples

Send a simple email using Mailgun. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, HttpRequest, HttpResponse, StringBuilder, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
req: HCkHttpRequest;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
id: PWideChar;
message: PWideChar;

begin
success := False;

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

http := CkHttp_Create();

// Implements the following CURL command:

// curl -s --user 'api:SENDING_API_KEY' 
// 	 https://api.mailgun.net/v3/YOUR_DOMAIN_NAME/messages 
// 	 -F from='Your Name <mailgun@YOUR_DOMAIN_NAME>' 
// 	 -F to='Joe Example <joe@example.com>' 
// 	 -F subject='Hello Joe Example' 
// 	 -F text='Congratulations Joe Example, you just sent an email with Mailgun!  You are truly awesome!'

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

CkHttp_putLogin(http,'api');
CkHttp_putPassword(http,'sending_api_key');//  Replace with your actual sending API key.

req := CkHttpRequest_Create();
CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putPath(req,'/v3/YOUR_DOMAIN_NAME/messages');
CkHttpRequest_putContentType(req,'multipart/form-data');

// Change YOUR_DOMAIN_NAME to something like "mg.your-domain.com".
CkHttpRequest_AddParam(req,'from','Your Name <mailgun@YOUR_DOMAIN_NAME>');
CkHttpRequest_AddParam(req,'to','Joe Example <joe@example.com>');
CkHttpRequest_AddParam(req,'subject','Hello Joe Example');
CkHttpRequest_AddParam(req,'text','Congratulations Joe Example, you just sent an email with Mailgun!  You are truly awesome!');

resp := CkHttpResponse_Create();
success := CkHttp_HttpSReq(http,'api.mailgun.net',443,True,req,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbResponseBody := CkStringBuilder_Create();
CkHttpResponse_GetBodySb(resp,sbResponseBody);
jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttpResponse__header(resp));
    Memo1.Lines.Add('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 := CkJsonObject__stringOf(jResp,'id');
message := CkJsonObject__stringOf(jResp,'message');

CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;