(Objective-C) Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoImap.h>
#import <CkoMessageSet.h>
#import <CkoEmailBundle.h>
#import <CkoEmail.h>
#import <NSString.h>

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

CkoImap *imap = [[CkoImap alloc] init];

// Connect to an IMAP server.
// Use TLS
imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];
BOOL success = [imap Connect: @"imap.someMailServer.com"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Login
success = [imap Login: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = [imap SelectMailbox: @"Inbox"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

CkoMessageSet *messageSet = 0;
// We can choose to fetch UIDs or sequence numbers.
BOOL fetchUids = YES;

// Get the message IDs of all the emails in the mailbox
messageSet = [imap Search: @"ALL" bUid: fetchUids];
if (imap.LastMethodSuccess != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Fetch the email headers into a bundle object:
CkoEmailBundle *bundle = 0;
bundle = [imap FetchHeaders: messageSet];
if (imap.LastMethodSuccess != YES) {

    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Scan for emails with attachments, and save the attachments
// to a sub-directory.
int i;
for (i = 0; i <= [bundle.MessageCount intValue] - 1; i++) {
    CkoEmail *email = 0;
    email = [bundle GetEmail: [NSNumber numberWithInt: i]];

    // Does this email have attachments?
    // Use GetMailNumAttach because the attachments
    // are not actually in the email object because
    // we only downloaded headers.
    // (Had we downloaded the full emails by
    // calling mailman.FetchBundle, we could look
    // at the email object's NumAttachments property.)
    int numAttach = [[imap GetMailNumAttach: email] intValue];

    if (numAttach > 0) {
        // Download the entire email and save the
        // attachments. (Remember, we 
        // need to download the entire email because
        // only the headers were previously downloaded.
        // If the entire emails were downloaded by
        // calling FetchBundle instead of FetchHeaders,
        // this would not be necessary.

        // The ckx-imap-uid header field is added when
        // headers are downloaded.  This makes it possible
        // to get the UID from the email object.
        NSString *uidStr = [email GetHeaderField: @"ckx-imap-uid"];
        int uid = [uidStr intValue];

        CkoEmail *fullEmail = 0;
        fullEmail = [imap FetchSingle: [NSNumber numberWithInt: uid] bUid: YES];
        if (imap.LastMethodSuccess == YES) {
            success = [fullEmail SaveAllAttachments: @"attachmentsDir"];

        }

        int j;
        for (j = 0; j <= numAttach - 1; j++) {
            NSString *filename = [imap GetMailAttachFilename: email attachIndex: [NSNumber numberWithInt: j]];
            NSLog(@"%@",filename);
        }

    }

}

// Disconnect from the IMAP server.
success = [imap Disconnect];