Function _parse_header_lines

Lib/http/client.py:236–248

Parses only RFC 5322 headers from header lines. email Parser wants to see strings rather than bytes. But a TextIOWrapper around self.rfile would buffer too many bytes from the stream, bytes which we later need to read as bytes. So we read the correct bytes here, as bytes, for e

(header_lines, _class=HTTPMessage)

    return headers

def _parse_header_lines(header_lines, _class=HTTPMessage):
    """
    Parses only RFC 5322 headers from header lines.

    email Parser wants to see strings rather than bytes.
    But a TextIOWrapper around self.rfile would buffer too many bytes
    from the stream, bytes which we later need to read as bytes.
    So we read the correct bytes here, as bytes, for email Parser
    to parse.

    """
    hstring = b''.join(header_lines).decode('iso-8859-1')
    return email.parser.Parser(_class=_class).parsestr(hstring)

def parse_headers(fp, _class=HTTPMessage):
    """Parses only RFC 5322 headers from a file pointer."""