Delphi DLL

SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
bd: HCkBinData;
resp: HCkHttpResponse;
respStatusCode: Integer;

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

// Load a file to be attached.
bd := CkBinData_Create();
success := CkBinData_LoadFile(bd,'qa_data/pdf/hello.pdf');

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

// Adds the "Authorization: Bearer YOUR_API_KEY" header.
CkHttp_putAuthToken(http,'YOUR_API_KEY');

resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST','https://api.sendgrid.com/v3/mail/send',json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 202) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttpResponse__header(resp));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;
Memo1.Lines.Add('Success.');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkBinData_Dispose(bd);
CkHttpResponse_Dispose(resp);

end;