comparison mercurial/mail.py @ 15562:a82b6038ff08

mail: use quoted-printable for mime encoding to avoid too long lines (issue3075)

Quoted-printable was already used for the more critical patch mails, so it
should be fine for everything else as well.

15561:ca572e94d8e7

        if not util.findexe(method):
            raise util.Abort(_('%r specified as email transport, '
                               'but not in PATH') % method)

def mimetextpatch(s, subtype='plain', display=False):
    '''If patch in utf-8 transfer-encode it.'''

    enc = None
    for line in s.splitlines():
        if len(line) > 950:
            s = quopri.encodestring(s)
            enc = "quoted-printable"
            break

    cs = 'us-ascii'
    if not display:
        try:
            s.decode('us-ascii')

                cs = 'utf-8'
            except UnicodeDecodeError:
                # We'll go with us-ascii as a fallback.
                pass

    msg = email.MIMEText.MIMEText(s, subtype, cs)
    if enc:
        del msg['Content-Transfer-Encoding']
        msg['Content-Transfer-Encoding'] = enc
    return msg

    '''creates mime text object, encodes it if needed, and sets
    charset and transfer-encoding accordingly.'''
    cs = 'us-ascii'
    if not display:
        s, cs = _encode(ui, s, charsets)
    return email.MIMEText.MIMEText(s, 'plain', cs)

15562:a82b6038ff08

        if not util.findexe(method):
            raise util.Abort(_('%r specified as email transport, '
                               'but not in PATH') % method)

def mimetextpatch(s, subtype='plain', display=False):
    '''Return MIME message suitable for a patch.
    Charset will be detected as utf-8 or (possibly fake) us-ascii.
    Transfer encodings will be used if necessary.'''

    cs = 'us-ascii'
    if not display:
        try:
            s.decode('us-ascii')

                cs = 'utf-8'
            except UnicodeDecodeError:
                # We'll go with us-ascii as a fallback.
                pass

    return mimetextqp(s, subtype, cs)

def mimetextqp(body, subtype, charset):
    '''Return MIME message.
    Qouted-printable transfer encoding will be used if necessary.
    '''
    enc = None
    for line in body.splitlines():
        if len(line) > 950:
            body = quopri.encodestring(body)
            enc = "quoted-printable"
            break

    msg = email.MIMEText.MIMEText(body, subtype, charset)
    if enc:
        del msg['Content-Transfer-Encoding']
        msg['Content-Transfer-Encoding'] = enc
    return msg

    '''creates mime text object, encodes it if needed, and sets
    charset and transfer-encoding accordingly.'''
    cs = 'us-ascii'
    if not display:
        s, cs = _encode(ui, s, charsets)
    return mimetextqp(s, 'plain', cs)