Objective-C

Get Response Header for Method that does not Return HttpResponse Object

Demonstrates how to get the response header and individual response header fields for a method that does not return an HTTP response object. (If a method returns an HHTTP response object, then the response header information should be obtained from the response object.) Objective-C

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

BOOL success = NO;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

CkoHttp *http = [[CkoHttp alloc] init];

NSString *strHtml = [http QuickGetStr: @"https://www.duckduckgo.com/"];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@",http.LastResponseHeader);

//  Here's a sample HTTP response header:

//  Server: nginx
//  Date: Wed, 30 Sep 2020 13:13:02 GMT
//  Content-Type: text/html; charset=UTF-8
//  Transfer-Encoding: chunked
//  Connection: keep-alive
//  Vary: Accept-Encoding
//  ETag: W/"5f7371f4-1683"
//  Strict-Transport-Security: max-age=31536000
//  X-Frame-Options: SAMEORIGIN
//  Content-Security-Policy: default-src https: blob: data: 'unsafe-inline' 'unsafe-eval'; frame-ancestors 'self'
//  X-XSS-Protection: 1;mode=block
//  X-Content-Type-Options: nosniff
//  Referrer-Policy: origin
//  Expect-CT: max-age=0
//  Expires: Wed, 30 Sep 2020 13:13:01 GMT
//  Cache-Control: no-cache
//  Content-Encoding: gzip

//  We can load it into a Chilkat MIME object to get header field values:
CkoMime *mime = [[CkoMime alloc] init];

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

//  Get MIME header field values using Chilkat MIME...
NSLog(@"%@",@"----");
NSLog(@"%@%@",@"ETag: ",[mime GetHeaderField: @"ETag"]);