Objective-C

Get IMAP Attachment Sizes

Demonstrates the Chilkat Imap.GetMailAttachSize method, which returns the size in bytes of an attachment. The first argument is the Email and the second is the zero-based attachment index. This example fetches headers only and prints each attachment's name and size.

Background: Like the attachment filename, the size comes from ckx-imap-* metadata and is available from a header-only fetch without downloading the body. A client can therefore show attachment sizes in a message preview, and decide whether to auto-download or prompt before pulling a large file.

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Objective-C

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

BOOL success = NO;

//  Demonstrates the Imap.GetMailAttachSize method, which returns the size in bytes of an
//  attachment.  The 1st argument is the Email and the 2nd is the zero-based attachment index.

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

imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];

success = [imap Connect: @"imap.example.com"];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

success = [imap Login: @"user@example.com" password: @"myPassword"];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

success = [imap SelectMailbox: @"Inbox"];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

//  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
//  metadata describing the attachments is present, so the attachment info methods still work.
BOOL headersOnly = YES;
BOOL useUid = NO;
int seqNum = 1;
CkoEmail *email = [[CkoEmail alloc] init];
success = [imap FetchEmail: headersOnly msgId: seqNum bUid: useUid email: email];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

int numAttach = [[imap GetMailNumAttach: email] intValue];
int i;
for (i = 0; i <= numAttach - 1; i++) {
    NSString *fname = [imap GetMailAttachFilename: email attachIndex: [NSNumber numberWithInt: i]];
    if (imap.LastMethodSuccess == NO) {
        NSLog(@"%@",imap.LastErrorText);
        return;
    }

    int sz = [[imap GetMailAttachSize: email attachIndex: [NSNumber numberWithInt: i]] intValue];
    NSLog(@"%@%@%d%@",fname,@": ",sz,@" bytes");
}

success = [imap Disconnect];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}