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(Unicode C) How to Download Messages in MessageSet One at a TimeIf a message set contains a huge number of emails, it's NOT a good idea to try to download all at once into an email bundle using a method such as FetchBundle. It's better to iterate over the messages in the set to download one by one. Note: This example requires Chilkat v11.0.0 or greater.
#include <C_CkImapW.h> #include <C_CkMessageSetW.h> #include <C_CkEmailW.h> void ChilkatSample(void) { BOOL success; HCkImapW imap; BOOL fetchUids; HCkMessageSetW messageSet; HCkEmailW email; int i; success = FALSE; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. imap = CkImapW_Create(); // Connect using TLS. CkImapW_putSsl(imap,TRUE); CkImapW_putPort(imap,993); success = CkImapW_Connect(imap,L"imap.example.com"); if (success == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Authenticate success = CkImapW_Login(imap,L"email_account_login",L"email_account_password"); if (success == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Select an IMAP mailbox success = CkImapW_SelectMailbox(imap,L"Inbox"); if (success == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Search for messages and return a set of matching messages. // (This example will simply search for ALL messages.) fetchUids = TRUE; messageSet = CkMessageSetW_Create(); success = CkImapW_QueryMbx(imap,L"ALL",fetchUids,messageSet); if (success == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); CkMessageSetW_Dispose(messageSet); return; } wprintf(L"Number of messages = %d\n",CkMessageSetW_getCount(messageSet)); email = CkEmailW_Create(); i = 0; while (i < CkMessageSetW_getCount(messageSet)) { success = CkImapW_FetchEmail(imap,FALSE,CkMessageSetW_GetId(messageSet,i),fetchUids,email); if (success == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); CkMessageSetW_Dispose(messageSet); CkEmailW_Dispose(email); return; } wprintf(L"%s; %s\n",CkEmailW_ck_from(email),CkEmailW_subject(email)); i = i + 1; } wprintf(L"OK\n"); CkImapW_Dispose(imap); CkMessageSetW_Dispose(messageSet); CkEmailW_Dispose(email); } |
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