Objective-C

Firebase DELETE - Removing Data

See more Firebase Examples

Uses the DELETE method to delete data. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

Objective-C

#import <CkoFileAccess.h>
#import <NSString.h>
#import <CkoRest.h>
#import <CkoAuthGoogle.h>

BOOL success = NO;

//  Uses the DELETE method to delete a Firebase record.

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

//  This example assumes a JWT authentication token, if required, has been previously obtained.
//  See Get Firebase Access Token from JSON Service Account Private Key for sample code.

//  Load the previously obtained Firebase access token into a string.
CkoFileAccess *fac = [[CkoFileAccess alloc] init];
NSString *accessToken = [fac ReadEntireTextFile: @"qa_data/tokens/firebaseToken.txt" charset: @"utf-8"];
if (fac.LastMethodSuccess != YES) {
    NSLog(@"%@",fac.LastErrorText);
    return;
}

CkoRest *rest = [[CkoRest alloc] init];

//  Make the initial connection (without sending a request yet).
//  Once connected, any number of requests may be sent.  It is not necessary to explicitly
//  call Connect before each request.  
success = [rest Connect: @"chilkat.firebaseio.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

CkoAuthGoogle *authGoogle = [[CkoAuthGoogle alloc] init];
authGoogle.AccessToken = accessToken;
[rest SetAuthGoogle: authGoogle];

//  Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
//  This data is publicly readable, but not writable.  You'll need to 
//  run against your own database..

//  We're going to delete a pig we previously added.  The push ID of that pig was -KI3pT33wKauiMxY4QTB,
//  so the path will be "/pig-rescue/animal/-KI3pT33wKauiMxY4QTB.json"

NSString *jsonResponse = [rest FullRequestNoBody: @"DELETE" uriPath: @"/pig-rescue/animal/-KI3pT33wKauiMxY4QTB.json"];
if (rest.LastMethodSuccess != YES) {
    //  Something happened in the communications (either no request was sent, or no response was received.
    //  (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
    //  and then receive the response in another call.)
    NSLog(@"%@",rest.LastErrorText);
    return;
}

//  Check the response status code.   A 200 response status indicates success.
if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@",rest.ResponseStatusText);
    NSLog(@"%@",jsonResponse);
    NSLog(@"%@",@"Failed.");
    return;
}

NSLog(@"%@",@"Success.");