sqlmapproject/sqlmap · error · H2Error

hostname bytes are neither ASCII nor UTF-8

Error message

hostname bytes are neither ASCII nor UTF-8

What it means

Error "hostname bytes are neither ASCII nor UTF-8" thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/request/http2.py:563

def _read_frame(sock, max_frame_size=DEFAULT_MAX_FRAME_SIZE):
    length, ftype, flags, sid = decode_frame_header(_recv_exact(sock, 9))
    if length > max_frame_size:
        raise H2ProtocolError("received frame exceeds local maximum frame size")
    payload = _recv_exact(sock, length) if length else b""
    return ftype, flags, sid, payload


def _idna_host(host):
    if isinstance(host, bytes):
        try:
            host = host.decode("ascii")
        except UnicodeDecodeError:
            try:
                host = host.decode("utf-8")
            except UnicodeDecodeError:
                raise H2Error("hostname bytes are neither ASCII nor UTF-8")
    if not isinstance(host, text_type):
        host = text_type(host)
    if host.startswith("[") and host.endswith("]"):
        host = host[1:-1]
    if not host:
        raise H2Error("hostname is required")
    if ":" in host:  # IPv6 literal, optionally with a zone identifier
        return host
    try:
        return host.encode("idna").decode("ascii")
    except (UnicodeError, AttributeError):
        raise H2Error("invalid internationalized hostname %r" % host)


def _format_authority_host(host):
    host = _idna_host(host)
    if ":" in host:
        return "[%s]" % host

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/request/http2.py:563 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/bf329752887a2560. Report an issue: GitHub.