Function domain_to_idna

updateHostsFile.py:1596–1672

Encode a domain that is present into a line into `idna`. This way we avoid most encoding issues. Parameters ---------- line : str The line we have to encode/decode. Returns ------- line : str The line in a converted format. Notes -----

(line)

def domain_to_idna(line):
    """
    Encode a domain that is present into a line into `idna`. This way we
    avoid most encoding issues.

    Parameters
    ----------
    line : str
        The line we have to encode/decode.

    Returns
    -------
    line : str
        The line in a converted format.

    Notes
    -----
    - This function encodes only the domain to `idna` format because in
        most cases, the encoding issue is due to a domain which looks like
        `b'\xc9\xa2oogle.com'.decode('idna')`.
    - About the splitting:
        We split because we only want to encode the domain and not the full
        line, which may cause some issues. Keep in mind that we split, but we
        still concatenate once we encoded the domain.

        - The following split the prefix `0.0.0.0` or `127.0.0.1` of a line.
        - The following also split the trailing comment of a given line.
    """

    if not line.startswith("#"):
        tabs = "\t"
        space = " "

        tabsposition, spaceposition = (line.find(tabs), line.find(space))

        if tabsposition > -1 and spaceposition > -1:
            if spaceposition < tabsposition:
                separator = space
            else:
                separator = tabs
        elif not tabsposition == -1:
            separator = tabs
        elif not spaceposition == -1:
            separator = space
        else:
            separator = ""

        if separator:
            splited_line = line.split(separator)

            try:
                index = 1
                while index < len(splited_line):
                    if splited_line[index]:
                        break
                    index += 1

                if "#" in splited_line[index]: