(MFC) batchGet (Read Multiple Ranges)

Reads multiple ranges from a Google Sheets spreadsheet in one GET request.

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

See Also: Using MFC CString in Chilkat

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

void ChilkatSample(void)
    {
    CkString strOut;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  This example uses a previously obtained access token having permission for the
    //  Google Sheets scope.

    //  In this example, Get Google Sheets OAuth2 Access Token, the access
    //  token was saved to a JSON file.  This example fetches the access token from the file..
    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/googleSheets.json");
    if (jsonToken.HasMember("access_token") == false) {
        strOut.append("No access token found.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  We'll be sending a GET request with query params to this URL:  https://sheets.googleapis.com/v4/spreadsheets/spreadsheetId/values:batchGet?ranges=Sheet1!A1:A2&ranges=Sheet1!B1:B2
    //  The domain is "sheets.googleapis.com"
    //  The path is "/v4/spreadsheets/spreadsheetId/values:batchGet"
    CkHttpRequest req;
    req.put_Path("/v4/spreadsheets/spreadsheetId/values:batchGet");
    req.put_HttpVerb("GET");
    //  Add each range to fetch.
    req.AddParam("ranges","Sheet1!A1:A2");
    req.AddParam("ranges","Sheet1!B1:B2");

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

    //  443 is the SSL/TLS port for HTTPS.
    CkHttpResponse *resp = http.SynchronousRequest("sheets.googleapis.com",443,true,req);
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append(resp->bodyStr());
    strOut.append("\r\n");

    CkJsonObject json;
    json.Load(resp->bodyStr());

    delete resp;

    //  A sample response is shown below.
    //  To generate the parsing source code for a JSON response, paste
    //  the JSON into this online tool: Generate JSON parsing code

    //  {
    //    "spreadsheetId": "1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA",
    //    "valueRanges": [
    //      {
    //        "range": "Sheet1!A1:A2",
    //        "majorDimension": "ROWS",
    //        "values": [
    //          [
    //            "Item"
    //          ],
    //          [
    //            "Wheel"
    //          ]
    //        ]
    //      },
    //      {
    //        "range": "Sheet1!B1:B2",
    //        "majorDimension": "ROWS",
    //        "values": [
    //          [
    //            "Cost"
    //          ],
    //          [
    //            "$20.50"
    //          ]
    //        ]
    //      }
    //    ]
    //  }

    int i;
    int count_i;
    int j;
    int count_j;
    int k;
    int count_k;

    const char *spreadsheetId = json.stringOf("spreadsheetId");
    i = 0;
    count_i = json.SizeOfArray("valueRanges");
    while (i < count_i) {
        json.put_I(i);
        const char *range = json.stringOf("valueRanges[i].range");
        const char *majorDimension = json.stringOf("valueRanges[i].majorDimension");
        j = 0;
        count_j = json.SizeOfArray("valueRanges[i].values");
        while (j < count_j) {
            json.put_J(j);
            k = 0;
            count_k = json.SizeOfArray("valueRanges[i].values[j]");
            while (k < count_k) {
                json.put_K(k);
                const char *strVal = json.stringOf("valueRanges[i].values[j][k]");
                k = k + 1;
            }

            j = j + 1;
        }

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }