(Delphi DLL) Insert Email into GMail Folder

Directly inserts a message into only this user's mailbox similar to IMAP APPEND, bypassing most scanning and classification. Does not send a message.

This example will create a Chilkat Email object and upload/insert it into GMail. Then adds the "INBOX" label to the email to make it appear in INBOX

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX 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;
http: HCkHttp;
resp: HCkHttpResponse;
url: PWideChar;
json: HCkJsonObject;
id: PWideChar;
json2: HCkJsonObject;

begin
success := False;

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

email := CkEmail_Create();

// This example chooses to load an email from a file.
success := CkEmail_LoadEml(email,'qa_data/eml/testEmail.eml');
if (success = False) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

// Get the email as MIME.
sbMime := CkStringBuilder_Create();
CkEmail_GetMimeSb(email,sbMime);

http := CkHttp_Create();
resp := CkHttpResponse_Create();

CkHttp_putAuthToken(http,'GMAIL-ACCESS-TOKEN');

// Upload to GMail (does not send, but just inserts).

// IMPORTANT: After uploading/inserting, you won't see the message in the Inbox.
// In your web browser, if you go to "All Mail", you will see it.

url := 'https://www.googleapis.com/upload/gmail/v1/users/me/messages?uploadType=media';
CkHttp_putUncommonOptions(http,'SendGzipped');
success := CkHttp_HttpSb(http,'POST',url,sbMime,'utf-8','message/rfc822',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
CkHttp_putUncommonOptions(http,'');

// 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.
// A sample successful JSON response:

// {
//  "id": "166f583051d36144",
//  "threadId": "166f5529e079a456"
// }

json := CkJsonObject_Create();
CkJsonObject_Load(json,CkHttpResponse__bodyStr(resp));
id := CkJsonObject__stringOf(json,'id');

// Add the Inbox label to the inserted email so that it appears in Inbox.
Memo1.Lines.Add('---- Adding the Inbox label to the newly inserted email. ----');

// Create the following JSON to be sent in a POST to modify labels for this message.
// {
//   "addLabelIds": [
//     "INBOX"
//     ]
// }

json2 := CkJsonObject_Create();
CkJsonObject_UpdateString(json2,'addLabelIds[0]','INBOX');

CkHttp_SetUrlVar(http,'id',id);
url := 'https://www.googleapis.com/gmail/v1/users/me/messages/{$id}/modify';

success := CkHttp_HttpJson(http,'POST',url,json2,'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.
// A sample successful JSON response:

// {
//  "id": "166f583051d36144",
//  "threadId": "166f583051d36144",
//  "labelIds": [
//   "INBOX"
//  ]
// }

CkEmail_Dispose(email);
CkStringBuilder_Dispose(sbMime);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);
CkJsonObject_Dispose(json);
CkJsonObject_Dispose(json2);

end;