(C++) Google Translate Text

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Demonstrates how to use the Cloud Translation API to translate text from one spoken language to another. The example translates from English to Spanish.

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#include <CkJsonObject.h>
#include <CkHttp.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.

    // --------------------------------------------------------------------------------
    // IMPORTANT: 
    // Don't forget you need to 1st enable the Cloud Translation API in your Google Developers Console at https://console.cloud.google.com
    // --------------------------------------------------------------------------------

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/_googleTranslate.json");
    if (success != true) {
        std::cout << "Failed to load _googleTranslate.json" << "\r\n";
        return;
    }

    CkHttp http;

    http.put_AuthToken(jsonToken.stringOf("access_token"));

    // The following JSON is sent in the request body.

    CkJsonObject json;
    // The following code creates the JSON request body.
    json.UpdateString("q","The quick brown fox jumped over the lazy dog.");
    json.UpdateString("source","en");
    json.UpdateString("target","es");
    json.UpdateString("format","text");

    json.put_EmitCompact(false);
    std::cout << json.emit() << "\r\n";

    CkHttpResponse *resp = http.PostJson3("https://translation.googleapis.com/language/translate/v2","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject jResp;
    resp->GetBodyJson(jResp);
    jResp.put_EmitCompact(false);

    std::cout << "Response Body:" << "\r\n";
    std::cout << jResp.emit() << "\r\n";

    int respStatusCode = resp->get_StatusCode();
    std::cout << "Response Status Code = " << respStatusCode << "\r\n";
    if (respStatusCode >= 400) {
        std::cout << "Response Header:" << "\r\n";
        std::cout << resp->header() << "\r\n";
        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "data": {
    //     "translations": [
    //       {
    //         "translatedText": "El zorro rpida salt sobre el perro perezoso."
    //       }
    //     ]
    //   }
    // }

    const char *translatedText = 0;

    int i = 0;
    int n = jResp.SizeOfArray("data.translations");
    while (i < n) {
        jResp.put_I(i);
        translatedText = jResp.stringOf("data.translations[i].translatedText");
        std::cout << translatedText << "\r\n";
        i = i + 1;
    }
    }