(Lianja) Firebase PATCH - Updating Data

Uses the PATCH method to update record with new information. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

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// Uses the PATCH method to update 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.
loFac = createobject("CkFileAccess")
lcAccessToken = loFac.ReadEntireTextFile("qa_data/tokens/firebaseToken.txt","utf-8")
if (loFac.LastMethodSuccess <> .T.) then
    ? loFac.LastErrorText
    release loFac
    return
endif

loRest = createobject("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.  
llSuccess = loRest.Connect("chilkat.firebaseio.com",443,.T.,.T.)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loFac
    release loRest
    return
endif

loAuthGoogle = createobject("CkAuthGoogle")
loAuthGoogle.AccessToken = lcAccessToken
loRest.SetAuthGoogle(loAuthGoogle)

// 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 update "Molly II" to "Molly III"
loPigNameUpdate = createobject("CkJsonObject")
loPigNameUpdate.AppendString("name","Molly III")

// The string content of the last arg passed is  {"name":"Molly III"} 
lcJsonResponse = loRest.FullRequestString("PATCH","/pig-rescue/animal/-KI3bD-FU_Dake7sYOiP.json",loPigNameUpdate.Emit())
if (loRest.LastMethodSuccess <> .T.) 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.)
    ? loRest.LastErrorText
    release loFac
    release loRest
    release loAuthGoogle
    release loPigNameUpdate
    return
endif

// Check the response status code.   A 200 response status indicates success.
if (loRest.ResponseStatusCode <> 200) then
    ? loRest.ResponseStatusText
    ? lcJsonResponse
    ? "Failed."
    release loFac
    release loRest
    release loAuthGoogle
    release loPigNameUpdate
    return
endif

// When successful, the response contains the data written.
? lcJsonResponse
? "Success."


release loFac
release loRest
release loAuthGoogle
release loPigNameUpdate