def _check_request_headers(docmeta: DocMetadata, response_data: Dict[str, Any],
headers: Dict[str, Any]) -> bool:
"""Check the request headers, update the response headers accordingly."""
last_mod_dt: datetime = docmeta.modified
# Latest trackback ping time depends on the database
if 'trackback_ping_latest' in response_data \
and isinstance(response_data['trackback_ping_latest'], datetime) \
and response_data['trackback_ping_latest'] > last_mod_dt:
# If there is a more recent trackback ping, use that datetime
last_mod_dt = response_data['trackback_ping_latest']
# Check for request headers If-Modified-Since and If-None-Match and compare
# them to the last modified time to determine whether we will return a
# "not modified" response
mod_since_dt = _time_header_parse(headers, 'If-Modified-Since')
none_match_dt = _time_header_parse(headers, 'If-None-Match')
not_modified = _not_modified(last_mod_dt, mod_since_dt, none_match_dt)
last_mod_mime = mime_header_date(last_mod_dt)
headers['Last-Modified'] = last_mod_mime
headers['ETag'] = last_mod_mime
headers['Expires'] = abs_expires_header()[1]
return not_modified
def _check_request_headers(docmeta: DocMetadata, response_data: Dict[str, Any],
resp_headers: Dict[str, Any]) -> bool:
"""Check the request headers, update the response headers accordingly."""
last_mod_dt: datetime = docmeta.modified
# Latest trackback ping time depends on the database
if 'trackback_ping_latest' in response_data \
and isinstance(response_data['trackback_ping_latest'], datetime) \
and response_data['trackback_ping_latest'] > last_mod_dt:
# If there is a more recent trackback ping, use that datetime
last_mod_dt = response_data['trackback_ping_latest']
last_mod_mime = mime_header_date(last_mod_dt)
etag = f'"{last_mod_mime}"'
resp_headers['Last-Modified'] = last_mod_mime
resp_headers['ETag'] = etag
resp_headers['Expires'] = abs_expires_header()[1]
not_modified = _not_modified(last_mod_dt,
_time_header_parse('If-Modified-Since'),
_get_req_header('if-none-match'), etag)
return not_modified
def _write_expires_header(response_headers: Dict[str, Any]) -> None:
"""Writes an expires header for the response."""
response_headers["Expires"] = abs_expires_header()[1]