(MFC) Delete All Files

Permanently deletes all files owned by the user without moving it to the trash.

This example works by first getting a list of all fileIds, and then iterating over the list to delete each file.

See Google Drive Files delete for more information.

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

See Also: Using MFC CString in Chilkat

#include <CkAuthGoogle.h>
#include <CkRest.h>
#include <CkJsonObject.h>
#include <CkStringArray.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

    bool success = true;

    // It 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 Drive scope.

    CkAuthGoogle gAuth;
    gAuth.put_AccessToken("GOOGLE-DRIVE-ACCESS-TOKEN");

    CkRest rest;

    // Connect using TLS.
    bool bAutoReconnect = true;
    success = rest.Connect("www.googleapis.com",443,true,bAutoReconnect);

    // Provide the authentication credentials (i.e. the access token)
    rest.SetAuthGoogle(gAuth);

    // Get 10 results per page for testing.  (The default page size is 100, with a max of 1000.
    rest.AddQueryParam("pageSize","10");

    CkJsonObject json;
    int i;
    int numFiles;

    // Send the request for the 1st page.
    const char *jsonResponse = rest.fullRequestNoBody("GET","/drive/v3/files");

    int pageNumber = 1;
    const char *pageToken = 0;
    bool bContinueLoop = rest.get_LastMethodSuccess() && (rest.get_ResponseStatusCode() == 200);

    const char *fileId = 0;
    CkStringArray saFileIds;

    while (bContinueLoop == true) {

        strOut.append("---- Page ");
        strOut.appendInt(pageNumber);
        strOut.append(" ----");
        strOut.append("\r\n");
        json.Load(jsonResponse);

        numFiles = json.SizeOfArray("files");
        i = 0;
        while (i < numFiles) {
            json.put_I(i);
            fileId = json.stringOf("files[i].id");
            strOut.append("name: ");
            strOut.append(json.stringOf("files[i].name"));
            strOut.append("\r\n");
            strOut.append("id: ");
            strOut.append(fileId);
            strOut.append("\r\n");
            saFileIds.Append(fileId);
            i = i + 1;
        }

        // Get the next page of files.
        // If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
        // for the next request.   If no "nextPageToken" was present, then this was the last page of files.
        pageToken = json.stringOf("nextPageToken");
        bContinueLoop = false;
        bool bHasMorePages = json.get_LastMethodSuccess();
        if (bHasMorePages == true) {
            rest.ClearAllQueryParams();
            rest.AddQueryParam("pageSize","10");
            rest.AddQueryParam("pageToken",pageToken);
            jsonResponse = rest.fullRequestNoBody("GET","/drive/v3/files");
            bContinueLoop = rest.get_LastMethodSuccess() && (rest.get_ResponseStatusCode() == 200);
            pageNumber = pageNumber + 1;
        }

    }

    // Before actually deleting, check for errors...
    if (rest.get_LastMethodSuccess() != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        strOut.append("response status code = ");
        strOut.appendInt(rest.get_ResponseStatusCode());
        strOut.append("\r\n");
        strOut.append("response status text = ");
        strOut.append(rest.responseStatusText());
        strOut.append("\r\n");
        strOut.append("response header: ");
        strOut.append(rest.responseHeader());
        strOut.append("\r\n");
        strOut.append("response JSON: ");
        strOut.append(jsonResponse);
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // OK, we have the full list of files.  Delete each..
    CkStringBuilder sbPath;
    numFiles = saFileIds.get_Count();
    i = 0;
    while (i < numFiles) {
        fileId = saFileIds.getString(i);

        rest.ClearAllQueryParams();

        sbPath.Clear();
        sbPath.Append("/drive/v3/files/");
        sbPath.Append(fileId);

        jsonResponse = rest.fullRequestNoBody("DELETE",sbPath.getAsString());
        if (rest.get_LastMethodSuccess() != true) {
            strOut.append(rest.lastErrorText());
            strOut.append("\r\n");
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

        // A successful response will have a status code equal to 204 and the response body is empty.
        // (If not successful, then there should be a JSON response body with information..)
        if (rest.get_ResponseStatusCode() != 204) {
            strOut.append("response status code = ");
            strOut.appendInt(rest.get_ResponseStatusCode());
            strOut.append("\r\n");
            strOut.append("response status text = ");
            strOut.append(rest.responseStatusText());
            strOut.append("\r\n");
            strOut.append("response header: ");
            strOut.append(rest.responseHeader());
            strOut.append("\r\n");
            strOut.append("response JSON: ");
            strOut.append(jsonResponse);
            strOut.append("\r\n");
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

        i = i + 1;
        strOut.appendInt(i);
        strOut.append(": Deleted ");
        strOut.append(fileId);
        strOut.append("\r\n");
    }

    strOut.append("All Files Deleted.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }