Objective-C

Set a MIME Body from Binary Bytes (BinData)

Demonstrates the Chilkat Mime.SetBodyBd method, which sets the decoded body bytes from a BinData, changes the transfer encoding to base64, and preserves the bytes exactly. The only argument is the BinData.

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 the direct way to put arbitrary binary content into a part from memory — a generated image, a decrypted blob — without a temporary file. Chilkat base64-encodes it so the bytes survive text-based transports unchanged. Note it does not set a Content-Type or disposition, so assign those yourself to describe what the bytes are.

Chilkat Objective-C Downloads

Download Chilkat for Objective-C

Objective-C

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

BOOL success = NO;

//  Demonstrates the Mime.SetBodyBd method, which sets the decoded body bytes from a BinData,
//  changes the transfer encoding to base64, and preserves the bytes exactly.  The only argument is
//  the BinData.

//  Put the binary body bytes into a BinData.
CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd LoadFile: @"qa_data/photo.jpg"];
if (success == NO) {
    NSLog(@"%@",bd.LastErrorText);
    return;
}

CkoMime *mime = [[CkoMime alloc] init];

//  Set a Content-Type for the binary content (SetBodyBd does not set one itself).
mime.ContentType = @"image/jpeg";

success = [mime SetBodyBd: bd];
if (success == NO) {
    NSLog(@"%@",mime.LastErrorText);
    return;
}

NSLog(@"%@%d%@",@"Body set from ",[bd.NumBytes intValue],@" bytes.");