Objective-C

Get a Header Field by Name

Demonstrates the Chilkat Email.GetHeaderField method, which returns the value of a header field by name. Header-field names are case-insensitive, so X-Priority and x-priority refer to the same field. This example reads several headers by name.

Background: Looking up a header by name is the quickest way to read a known field like Subject or a custom X- header. One caveat: some header names (such as Received) can legitimately appear more than once. When a field may repeat and you need every occurrence, enumerate by index with GetHeaderFieldName and GetHeaderFieldValue instead of looking up by name.

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Objective-C

#import <CkoEmail.h>

//  Demonstrates the GetHeaderField method, which returns the value of a header field by
//  name.  Header-field names are case-insensitive.

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"Quarterly report";
email.From = @"alice@example.com";
[email AddHeaderField: @"X-Priority" fieldValue: @"1"];

//  Get header field values by name.
NSLog(@"%@%@",@"Subject = ",[email GetHeaderField: @"Subject"]);
NSLog(@"%@%@",@"From = ",[email GetHeaderField: @"From"]);
NSLog(@"%@%@",@"X-Priority = ",[email GetHeaderField: @"x-priority"]);