Stream a REST Response Body to a Destination

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Demonstrates Rest.SetResponseBodyStream, which configures a Stream destination for response bodies received by the full-request convenience methods. The body is written to the stream only when the response status code matches the expected status.

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.

#import <CkoRest.h>
#import <CkoStream.h>
#import <NSString.h>

BOOL success = NO;

CkoRest *rest = [[CkoRest alloc] init];
BOOL bTls = YES;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"example.com" port: [NSNumber numberWithInt: 443] tls: bTls autoReconnect: bAutoReconnect];
if (success == NO) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

//  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.

//  Configure a Stream destination for response bodies received by the full-request convenience
//  methods.  The body is written to the stream only when the response status code matches the 1st
//  argument.
CkoStream *respStream = [[CkoStream alloc] init];
respStream.SinkFile = @"qa_output/response_body.dat";

//  The 2nd argument sets the stream character set from the response Content-Type charset for textual
//  responses.  The 3rd argument is the destination Stream.
BOOL bAutoSetCharset = YES;
int expectedStatus = 200;
success = [rest SetResponseBodyStream: [NSNumber numberWithInt: expectedStatus] autoSetStreamCharset: bAutoSetCharset responseStream: respStream];
if (success == NO) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

//  The full-request call now streams the response body to the sink instead of returning it.
NSString *responseText = [rest FullRequestNoBody: @"GET" uriPath: @"/api/largefile"];
if (rest.LastMethodSuccess == NO) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response streamed to file.  Status: ",[rest.ResponseStatusCode intValue]);