C++

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:

C++

#include <CkFileAccess.h>
#include <CkRest.h>
#include <CkAuthGoogle.h>
#include <CkPrng.h>
#include <CkJsonObject.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  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.
    CkFileAccess fac;
    const char *accessToken = fac.readEntireTextFile("qa_data/tokens/firebaseToken.txt","utf-8");
    if (fac.get_LastMethodSuccess() != true) {
        std::cout << fac.lastErrorText() << "\r\n";
        return;
    }

    CkRest rest;

    //  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",443,true,true);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    CkAuthGoogle authGoogle;
    authGoogle.put_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..

    //  Generate a new push ID.
    CkPrng prng;
    const char *pushId = prng.firebasePushId();

    //  We're going to add a new pig with just the name.
    CkJsonObject pigRecord;
    pigRecord.AppendString("name","William");

    CkStringBuilder path;
    path.Append("/pig-rescue/animal/");
    path.Append(pushId);
    path.Append(".json");

    //  The string content of the last arg passed is  {"name":"William"} 
    const char *jsonResponse = rest.fullRequestString("PUT",path.getAsString(),pigRecord.emit());
    if (rest.get_LastMethodSuccess() != true) {
        //  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.)
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    //  Check the response status code.   A 200 response status indicates success.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << rest.responseStatusText() << "\r\n";
        std::cout << jsonResponse << "\r\n";
        std::cout << "Failed." << "\r\n";
        return;
    }

    std::cout << jsonResponse << "\r\n";
    std::cout << "Success." << "\r\n";

    //  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.  
    //
    }