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(Delphi DLL) Read IMAP Email HeadersCall FetchHeaders to download only the email headers. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, EmailBundle, Imap, Email, MessageSet; ... procedure TForm1.Button1Click(Sender: TObject); var success: Boolean; imap: HCkImap; fetchUids: Boolean; messageSet: HCkMessageSet; bundle: HCkEmailBundle; headersOnly: Boolean; email: HCkEmail; name: PWideChar; addr: PWideChar; i: Integer; j: Integer; numAttach: Integer; attachSize: Integer; begin success := False; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. imap := CkImap_Create(); // Connect to an IMAP server. // Use TLS CkImap_putSsl(imap,True); CkImap_putPort(imap,993); success := CkImap_Connect(imap,'imap.example.com'); if (success = False) then begin Memo1.Lines.Add(CkImap__lastErrorText(imap)); Exit; end; // Login success := CkImap_Login(imap,'****','****'); if (success = False) then begin Memo1.Lines.Add(CkImap__lastErrorText(imap)); Exit; end; // Select an IMAP mailbox success := CkImap_SelectMailbox(imap,'Inbox'); if (success = False) then begin Memo1.Lines.Add(CkImap__lastErrorText(imap)); Exit; end; // Get the message IDs of all the emails in the mailbox // We can choose to fetch UIDs or sequence numbers. fetchUids := True; messageSet := CkMessageSet_Create(); success := CkImap_QueryMbx(imap,'ALL',fetchUids,messageSet); if (success = False) then begin Memo1.Lines.Add(CkImap__lastErrorText(imap)); Exit; end; // When downloading headers, each email object contains // (obviously) the headers, but the body will be missing. // Also, attachments will not be included. However, it is // possible to get information about the attachments // as well as the complete size of the email. bundle := CkEmailBundle_Create(); headersOnly := True; success := CkImap_FetchMsgSet(imap,headersOnly,messageSet,bundle); if (success = False) then begin Memo1.Lines.Add(CkImap__lastErrorText(imap)); Exit; end; // Loop over the email objects and display information // about each: email := CkEmail_Create(); i := 0; j := 0; while i < CkEmailBundle_getMessageCount(bundle) do begin CkEmailBundle_EmailAt(bundle,i,email); // Display the From and Subject Memo1.Lines.Add(CkEmail__from(email)); Memo1.Lines.Add(CkEmail__subject(email)); // Display the recipients: j := 0; while j < CkEmail_getNumTo(email) do begin Memo1.Lines.Add('TO: ' + CkEmail__getToName(email,j) + ', ' + CkEmail__getToAddr(email,j)); j := j + 1; end; j := 0; while j < CkEmail_getNumCC(email) do begin Memo1.Lines.Add('CC: ' + CkEmail__getCcName(email,j) + ', ' + CkEmail__getCcAddr(email,j)); j := j + 1; end; // Show the total size of the email, including body and attachments: Memo1.Lines.Add(IntToStr(CkEmail_getSize(email))); // When a full email is downloaded, we would use the // email.NumAttachments property in conjunction with the // email.GetMailAttach* methods. // However, when an email object contains only the header, // we need to access the attachment info differently: numAttach := CkImap_GetMailNumAttach(imap,email); j := 0; while j < numAttach do begin Memo1.Lines.Add(CkImap__getMailAttachFilename(imap,email,j)); attachSize := CkImap_GetMailAttachSize(imap,email,j); Memo1.Lines.Add(' size = ' + IntToStr(attachSize) + ' bytes'); j := j + 1; end; Memo1.Lines.Add('--'); end; // Disconnect from the IMAP server. success := CkImap_Disconnect(imap); CkImap_Dispose(imap); CkMessageSet_Dispose(messageSet); CkEmailBundle_Dispose(bundle); CkEmail_Dispose(email); end; |
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