Function pipeFileToResponse

examples/server.js:72–118

(res, file, type)

}

function pipeFileToResponse(res, file, type) {
  try {
    // Validate file path - prevent directory traversal
    const safeBasePath = path.join(__dirname, 'examples');
    const resolvedPath = path.resolve(path.join(safeBasePath, file));

    // Ensure the resolved path is within intended directory
    if (!resolvedPath.startsWith(safeBasePath)) {
      res.writeHead(400);
      res.end('Invalid file path');
      return;
    }

    // Check if file exists
    if (!fs.existsSync(resolvedPath)) {
      res.writeHead(404);
      res.end('File not found');
      return;
    }

    if (type) {
      res.writeHead(200, {
        'Content-Type': type,
      });
    } else {
      res.writeHead(200);
    }

    const stream = fs.createReadStream(resolvedPath);

    stream.on('error', (err) => {
      console.error('Error while reading file:', err.message);
      if (!res.headersSent) {
        res.writeHead(500, { 'Content-Type': 'text/plain' });
      }
      res.end('File read error');
    });

    stream.pipe(res);
  } catch (err) {
    console.error('Unexpected error:', err.message);
    if (!res.headersSent) {
      res.writeHead(500, { 'Content-Type': 'text/plain' });
    }
    res.end('Internal server error');
  }
}

dirs = listDirs(__dirname);