Objective-C

Get a Summary of the MIME Structure

Demonstrates the Chilkat Mime.GetStructure method, which returns a concise summary of the MIME tree. The only argument selects the format: xml for XML, or text (the default for any other value) for a plain-text outline.

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: A real message can nest multipart containers several levels deep — a multipart/mixed holding a multipart/alternative of text and HTML plus attachments — and GetStructure renders that hierarchy at a glance without the full content. It is the fast way to understand or debug an unfamiliar message's layout, in either a readable text outline or machine-parseable XML.

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Objective-C

#import <CkoMime.h>
#import <NSString.h>

BOOL success = NO;

//  Demonstrates the Mime.GetStructure method, which returns a concise summary of the MIME tree.
//  The only argument selects the output format: "xml" for XML, or "text" (the default) for a
//  plain-text outline.

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

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

//  Get a human-readable text outline of the MIME structure.
NSString *structure = [mime GetStructure: @"text"];
if (mime.LastMethodSuccess == NO) {
    NSLog(@"%@",mime.LastErrorText);
    return;
}

NSLog(@"%@",structure);