Objective-C

Get the Decoded MIME Body Bytes (BinData)

Demonstrates the Chilkat Mime.GetBodyBd method, which replaces the contents of a BinData with the decoded body bytes of the current part. The only argument is the BinData. Base64 and quoted-printable are decoded; headers and boundaries are not included.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is how you extract a part's actual content as bytes — the decoded payload of an attachment or an image, ready to hash, re-save, or hand to another API. Because it works in raw bytes it is the correct choice for binary parts, where a text decode would be wrong. Note it replaces the BinData contents rather than appending.

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Objective-C

#import <CkoMime.h>
#import <CkoBinData.h>

BOOL success = NO;

CkoMime *mime = [[CkoMime alloc] init];
success = [mime LoadMimeFile: @"qa_data/message.eml"];
if (success == NO) {
    NSLog(@"%@",mime.LastErrorText);
    return;
}

//  Replace the contents of a BinData with the decoded body bytes of the current part.  Base64 and
//  quoted-printable are decoded; MIME headers and multipart boundaries are not included.
CkoBinData *bd = [[CkoBinData alloc] init];
success = [mime GetBodyBd: bd];
if (success == NO) {
    NSLog(@"%@",mime.LastErrorText);
    return;
}

NSLog(@"%@%d%@",@"Decoded body: ",[bd.NumBytes intValue],@" bytes.");