import gnu.inet.encoding.IDNAException; //导入依赖的package包/类
/**
 * Fixup the domain label part of the authority.
 *
 * We're more lax than the spec. in that we allow underscores.
 *
 * @param label Domain label to fix.
 * @return Return fixed domain label.
 * @throws URIException
 */
private String fixupDomainlabel(String label)
throws URIException {

    // apply IDN-punycoding, as necessary
    try {
        // TODO optimize: only apply when necessary, or
        // keep cache of recent encodings
        label = IDNA.toASCII(label);
    } catch (IDNAException e) {
        if(TextUtils.matches(ACCEPTABLE_ASCII_DOMAIN, label)) {
            // domain name has ACE prefix, leading/trailing dash, or
            // underscore -- but is still a name we wish to tolerate;
            // simply continue
        } else {
            // problematic domain: neither ASCII acceptable characters
            // nor IDN-punycodable, so throw exception
            // TODO change to HeritrixURIException so distinguishable
            // from URIExceptions in library code
            URIException ue = new URIException(e+" "+label);
            ue.initCause(e);
            throw ue;
        }
    }
    label = label.toLowerCase();
    return label;
}
 

import gnu.inet.encoding.IDNAException; //导入依赖的package包/类
/**
 * Fixup the domain label part of the authority.
 * 
 * We're more lax than the spec. in that we allow underscores.
 * 
 * @param label Domain label to fix.
 * @return Return fixed domain label.
 * @throws URIException
 */
private String fixupDomainlabel(String label)
throws URIException {
    
    // apply IDN-punycoding, as necessary
    try {
        // TODO: optimize: only apply when necessary, or
        // keep cache of recent encodings
        label = IDNA.toASCII(label);
    } catch (IDNAException e) {
        if(TextUtils.matches(ACCEPTABLE_ASCII_DOMAIN,label)) {
            // domain name has ACE prefix, leading/trailing dash, or 
            // underscore -- but is still a name we wish to tolerate;
            // simply continue
        } else {
            // problematic domain: neither ASCII acceptable characters
            // nor IDN-punycodable, so throw exception 
            // TODO: change to HeritrixURIException so distinguishable
            // from URIExceptions in library code
            URIException ue = new URIException(e+" "+label);
            ue.initCause(e);
            throw ue;
        }
    }
    label = label.toLowerCase();
    return label;
}