Tcl

Firebase PUT - Writing Data

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Demonstrates how to PUT new data to a Firebase JSON database. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

Tcl

load ./chilkat.dll

set success 0

# Demonstrates how to PUT new data to a Firebase JSON database.

# 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..

# Generate a new push ID.
set prng [new_CkPrng]

set pushId [CkPrng_firebasePushId $prng]

# We're going to add a new pig with just the name.
set pigRecord [new_CkJsonObject]

CkJsonObject_AppendString $pigRecord "name" "William"

set path [new_CkStringBuilder]

CkStringBuilder_Append $path "/pig-rescue/animal/"
CkStringBuilder_Append $path $pushId
CkStringBuilder_Append $path ".json"

# The string content of the last arg passed is  {"name":"William"} 
set jsonResponse [CkRest_fullRequestString $rest "PUT" [CkStringBuilder_getAsString $path] [CkJsonObject_emit $pigRecord]]
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
    delete_CkPrng $prng
    delete_CkJsonObject $pigRecord
    delete_CkStringBuilder $path
    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
    delete_CkPrng $prng
    delete_CkJsonObject $pigRecord
    delete_CkStringBuilder $path
    exit
}

puts "$jsonResponse"
puts "Success."

# Note: In many of the Chilkat examples, you may notice strange ways
# of doing something that should be simpler and shorter.  For example,
# building the path (above) could've been written differently,
# with some simple string concatenation.
# 
# The reason is that the Chilkat examples are written in a 
# proprietary "example code" scripting language,
# and then automatically generated to each of the different programming
# languages you see on example-code.com.  The code generation is
# limited in what it can do.  For example, string concatentation
# is not yet a feature of the "example code" scripting language (as of May 2016), 
# and therefore you won't see the use of a programming language's string
# concatentation operators in any example.  
# 

delete_CkFileAccess $fac
delete_CkRest $rest
delete_CkAuthGoogle $authGoogle
delete_CkPrng $prng
delete_CkJsonObject $pigRecord
delete_CkStringBuilder $path