(C++) Firebase PUT - Writing Data

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:

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

void ChilkatSample(void)
    {
    // 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.  
    bool 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.  
    // 
    }