def _getCdnHeaders(self, req):
        headers = {'X-Web-Mode': 'True', 'User-Agent': 'SOS Origin'}
        for header in ['If-Modified-Since', 'If-Match', 'Range', 'If-Range']:
            if req.headers in header:
                headers[header] = req.headers[header]
        return headers
dataset/ETHPy150Open dpgoetz/sos/sos/origin.py/CdnHandler._getCdnHeaders/swapped operands of `in`