(C++) IBM Cloud - Text to Speech - Synthesize Audio (POST)

Synthesizes text to audio that is spoken in the specified voice. Uses a POST which allows for more text to be synthesized.

For more information, see https://cloud.ibm.com/apidocs/text-to-speech#synthesize-audio

Chilkat C/C++ Library Downloads
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#include <CkHttp.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttp http;
    bool success;

    http.put_Login("apikey");
    http.put_Password("my_apikey");
    http.put_BasicAuth(true);

    // Send the following request:

    // curl -X POST -u "apikey:{apikey}" 
    //    --header "Content-Type: application/json" 
    //    --header "Accept: audio/wav" 
    //    --data "{\"text\":\"When life gives you lemons, order the lobster tail.\"}" 
    //    --output lobster.wav "{url}/v1/synthesize?voice=en-US_AllisonV3Voice"

    // Use your base URL shown in the credentials web page (below your apikey)
    const char *myBaseUrl = "https://api.us-south.text-to-speech.watson.cloud.ibm.com/instances/31941e96-7b89-4d56-8993-9cd8f18ec2d8";

    CkStringBuilder sbUrl;
    sbUrl.Append(myBaseUrl);
    sbUrl.Append("/v1/synthesize?voice=en-US_AllisonV3Voice");

    http.put_Accept("audio/wav");

    CkJsonObject json;
    json.UpdateString("text","When life gives you lemons, order the lobster tail.");

    CkHttpResponse *resp = http.PostJson3(sbUrl.getAsString(),"application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int respStatusCode = resp->get_StatusCode();
    std::cout << "response status code = " << respStatusCode << "\r\n";

    if (respStatusCode == 200) {
        success = resp->SaveBodyBinary("qa_output/lobster.wav");
        std::cout << "Success!" << "\r\n";
    }
    else {
        std::cout << resp->bodyStr() << "\r\n";
    }

    delete resp;
    }