(C) Finnhub API - Get Stock Quote

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Note: This example requires Chilkat v11.4.0 or greater.

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#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    const char *apiKey;
    const char *symbol;
    HCkHttp http;
    const char *urlWithoutParams;
    HCkHttpRequest req;
    HCkHttpResponse resp;
    HCkJsonObject json;
    int statusCode;

    success = FALSE;

    // Replace with your actual Finnhub API key.
    apiKey = "YOUR_FINNHUB_API_KEY";
    symbol = "AAPL";

    http = CkHttp_Create();

    // This is the URL without params.
    urlWithoutParams = "https://finnhub.io/api/v1/quote";

    req = CkHttpRequest_Create();

    // Add params that will be sent in the URL.
    CkHttpRequest_AddParam(req,"symbol",symbol);
    CkHttpRequest_AddParam(req,"token",apiKey);

    CkHttpRequest_putHttpVerb(req,"GET");

    // Send the request to get the JSON response.
    resp = CkHttpResponse_Create();
    success = CkHttp_HttpReq(http,urlWithoutParams,req,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkHttpResponse_Dispose(resp);
        return;
    }

    json = CkJsonObject_Create();
    CkHttpResponse_GetBodyJson(resp,json);

    statusCode = CkHttpResponse_getStatusCode(resp);
    printf("response status code: %d\n",statusCode);

    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    // Sample result:

    // {
    //   "c": 248.8,
    //   "d": -4.09,
    //   "dp": -1.6173,
    //   "h": 255.493,
    //   "l": 248.07,
    //   "o": 253.9,
    //   "pc": 252.89,
    //   "t": 1774641600
    // }

    if (statusCode == 200) {
        // Add the symbol to the top of the result.
        CkJsonObject_AddStringAt(json,0,"symbol",symbol);

        // Rename members for clarification.
        CkJsonObject_Rename(json,"c","currentPrice");
        CkJsonObject_Rename(json,"d","change");
        CkJsonObject_Rename(json,"dp","percentChange");
        CkJsonObject_Rename(json,"h","high");
        CkJsonObject_Rename(json,"l","low");
        CkJsonObject_Rename(json,"o","open");
        CkJsonObject_Rename(json,"pc","prevClose");
        CkJsonObject_Rename(json,"t","unixTime");

        printf("%s\n",CkJsonObject_emit(json));

    }
    else {
        printf("Failed\n");
    }



    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkHttpResponse_Dispose(resp);
    CkJsonObject_Dispose(json);

    }