Objective-C

Get a Header Field of a Related Item

Demonstrates the Chilkat Email.GetRelatedHeader method, which returns the value of a named header field of a related item. The first argument is the zero-based related-item index and the second is the MIME header-field name. This example reads the Content-Type header of a related style sheet.

Background: Each related item is a MIME part with its own header block. Where GetRelatedAttr extracts a single named parameter from a header, GetRelatedHeader returns the entire value of a header field — for example the full Content-Type or Content-Location line — which is handy for inspecting exactly how an embedded resource is described.

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Objective-C

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

//  Demonstrates the GetRelatedHeader method, which returns the value of a header field (by
//  name) of a related item.  The first argument is the zero-based related-item index and the
//  second is the MIME header-field name.

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"GetRelatedHeader example";

//  Set an HTML body and add a related style sheet (index 0).
[email SetHtmlBody: @"<html><head><link rel=\"stylesheet\" href=\"styles.css\"/></head><body>Styled.</body></html>"];
[email AddRelatedString2: @"styles.css" str: @"body { color: navy; }" charset: @"utf-8"];

//  Get the Content-Type header of the first related item (index 0).
NSString *ct = [email GetRelatedHeader: [NSNumber numberWithInt: 0] fieldName: @"Content-Type"];
NSLog(@"%@%@",@"Related item 0 Content-Type: ",ct);