(Objective-C) Parsing a Multipart/Digest Email

This example demonstrates how to parse a multipart/digest email. An email parsed by this sample could have a MIME structure as follows:

multipart/mixed
    text/plain
    text/plain
    multipart/digest
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
    text/plain

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

// Note: This example requires Chilkat v9.5.0.66 or greater.

NSString *emlPath = @"qa_data/eml/multipart_digest.eml";

CkoEmail *email = [[CkoEmail alloc] init];

// For this example, we'll load the email from a .eml.
// The email could alternatively be loaded as a result of downloading from an IMAP or POP3 server..

BOOL success = [email LoadEml: emlPath];
if (success != YES) {
    NSLog(@"%@",email.LastErrorText);
    return;
}

int numDigests = [email.NumDigests intValue];
NSLog(@"%@%d",@"num digests = ",numDigests);

int i = 0;
while (i < numDigests) {
    CkoEmail *eDigest = [email GetDigest: [NSNumber numberWithInt: i]];
    NSLog(@"%d%@%@%@%@",i,@":",eDigest.FromAddress,@", ",eDigest.Subject);
    NSString *m = [eDigest GetHeaderField: @"Message"];
    if (eDigest.LastMethodSuccess == YES) {
        NSLog(@"%@%@",@"    Message = ",m);
    }

    i = i + 1;
}