Delphi DLL
Create GMail Draft

Demonstrates how to create a new GMail draft email.
Chilkat Delphi DLL Downloads

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
email: HCkEmail;
sbMime: HCkStringBuilder;
json: HCkJsonObject;
http: HCkHttp;
url: PWideChar;
resp: HCkHttpResponse;

begin
success := False;

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

// Use the Chilkat Email API to create or load an email.
email := CkEmail_Create();
CkEmail_putSubject(email,'This is a test GMail email created using Chilkat.');
CkEmail_putCharset(email,'utf-8');
CkEmail_AddPlainTextAlternativeBody(email,'This is a test');
CkEmail_AddHtmlAlternativeBody(email,'<html><body><p>This is a <b>test</b></body></html>');

// We'll need to get the full MIME of the email encoded to a base64url string.
sbMime := CkStringBuilder_Create();
CkEmail_GetMimeSb(email,sbMime);
CkStringBuilder_Encode(sbMime,'base64url','utf-8');

// The body of the HTTP request will be JSON..
json := CkJsonObject_Create();
CkJsonObject_UpdateSb(json,'message.raw',sbMime);

// Upload the email to GMail as a draft.
http := CkHttp_Create();
CkHttp_putAuthToken(http,'GMAIL-ACCESS-TOKEN');

url := 'https://www.googleapis.com/gmail/v1/users/me/drafts';
resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST',url,json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// A status code of 200 indicates success.
Memo1.Lines.Add('Response status code: ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
Memo1.Lines.Add('Response body:');
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

// The response body contains JSON.
// Use the online tool at Generate JSON Parsing Code
// to generate JSON parsing code.

// A sample successful JSON response:

// {
//  "id": "r-2607584557788895307",
//  "message": {
//   "id": "166f09932c662e93",
//   "threadId": "166f09932c662e93",
//   "labelIds": [
//    "DRAFT"
//   ]
//  }
// }

CkEmail_Dispose(email);
CkStringBuilder_Dispose(sbMime);
CkJsonObject_Dispose(json);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);

end;