Tcl

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:

Tcl

load ./chilkat.dll

set success 0

# 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.
set fac [new_CkFileAccess]

set accessToken [CkFileAccess_readEntireTextFile $fac "qa_data/tokens/firebaseToken.txt" "utf-8"]
if {[CkFileAccess_get_LastMethodSuccess $fac] != 1} then {
    puts [CkFileAccess_lastErrorText $fac]
    delete_CkFileAccess $fac
    exit
}

set rest [new_CkRest]

# 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.  
set success [CkRest_Connect $rest "chilkat.firebaseio.com" 443 1 1]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkFileAccess $fac
    delete_CkRest $rest
    exit
}

set authGoogle [new_CkAuthGoogle]

CkAuthGoogle_put_AccessToken $authGoogle $accessToken
CkRest_SetAuthGoogle $rest $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"

set jsonResponse [CkRest_fullRequestNoBody $rest "DELETE" "/pig-rescue/animal/-KI3pT33wKauiMxY4QTB.json"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    # 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.)
    puts [CkRest_lastErrorText $rest]
    delete_CkFileAccess $fac
    delete_CkRest $rest
    delete_CkAuthGoogle $authGoogle
    exit
}

# Check the response status code.   A 200 response status indicates success.
if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
    puts [CkRest_responseStatusText $rest]
    puts "$jsonResponse"
    puts "Failed."
    delete_CkFileAccess $fac
    delete_CkRest $rest
    delete_CkAuthGoogle $authGoogle
    exit
}

puts "Success."

delete_CkFileAccess $fac
delete_CkRest $rest
delete_CkAuthGoogle $authGoogle