(MFC) JSON Estimote Data

Demonstrates accessing some data from an Estimote REST API response. The Estimate REST API responds with a JSON array (i.e. something beginning with "[" and ending with "]"). To parse, this must be made into a JSON object by prepending "{"*":" and appending "}".

This example uses the following JSON object:

{"*":[{
        "id" : "B9407F30-F5F8-466E-AFF9-25556B57FE6D:28203:50324",
        "uuid" : "B9407F30-F5F8-466E-AFF9-25556B57FE6D",
        "major" : 28203,
        "minor" : 50324,
        "mac" : "dd6fc4946e2b",
        "settings" : {
            "battery" : 100,
            "interval" : 950,
            "hardware" : "D3.4",
            "firmware" : "A3.2.0",
            "basic_power_mode" : true,
            "smart_power_mode" : true,
            "timezone" : "America/Los_Angeles",
            "security" : false,
            "motion_detection" : true,
            "latitude": 37.7979,
            "longitude": -122.4408,
            "conditional_broadcasting" : "flip to stop",
            "broadcasting_scheme" : "estimote",
            "range" : -12,
            "power" : -12,
            "firmware_deprecated" : false,
            "firmware_newest" : true,
            "location" : null
        },
        "color" : "blueberry",
        "context_id" : 339488,
        "name" : "blueberry ibeacon1",
        "battery_life_expectancy_in_days" : 1377,
        "tags" : []
    }, {
        "id" : "B9407F30-F5F8-466E-AFF9-25556B57FE6D:25845:21739",
        "uuid" : "B9407F30-F5F8-466E-AFF9-25556B57FE6D",
        "major" : 25845,
        "minor" : 21739,
        "mac" : "ff5454eb64f5",
        "settings" : {
            "battery" : 100,
            "interval" : 950,
            "hardware" : "D3.4",
            "firmware" : "A3.2.0",
            "basic_power_mode" : false,
            "smart_power_mode" : true,
            "timezone" : "America/Los_Angeles",
            "security" : false,
            "motion_detection" : true,
            "conditional_broadcasting" : "flip to stop",
            "broadcasting_scheme" : "estimote",
            "range" : -12,
            "power" : -12,
            "firmware_deprecated" : false,
            "firmware_newest" : true,
            "location" : null
        },
        "color" : "blueberry",
        "context_id" : 339483,
        "name" : "blueberry2",
        "battery_life_expectancy_in_days" : 1168,
        "tags" : []
    }
]}

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkJsonObject json;
    json.put_EmitCompact(false);

    // Assume the file contains the data as shown above..
    bool success = json.LoadFile("qa_data/json/estimote.json");
    if (success != true) {
        strOut.append(json.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // To get the value for "settings.battery" for the 1st array object:
    int batteryVal = json.IntOf("*[0].settings.battery");
    strOut.append("battery: ");
    strOut.appendInt(batteryVal);
    strOut.append("\r\n");

    // To get the value for "settings.timezon" for the 1st array object:
    const char *timeZone = json.stringOf("*[0].settings.timezone");
    strOut.append("timezone: ");
    strOut.append(timeZone);
    strOut.append("\r\n");

    // To get the "settings.range" for the 2nd array object:
    int rangeVal = json.IntOf("*[1].settings.range");
    strOut.append("range: ");
    strOut.appendInt(rangeVal);
    strOut.append("\r\n");

    // To  get the "settings.longitude" for the 1st array object:
    // Note: Any primitie value can be retrieved as as string: integers, floating point numbers, booleans, etc.
    const char *longitudeStr = json.stringOf("*[0].settings.longitude");
    strOut.append("longitude: ");
    strOut.append(longitudeStr);
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }