Parse one search result page.

def handle_url(url, session, res):
    """Parse one search result page."""
    print("Parsing", url, file=sys.stderr)
    try:
        data = getPageContent(url, session)
    except IOError as msg:
        print("ERROR:", msg, file=sys.stderr)
        return
    for match in url_matcher.finditer(data):
        url = match.group(1) + '/'
        name = unescape(match.group(2))
        name = asciify(name.replace('&', 'And').replace('@', 'At'))
        name = capfirst(name)
        if name in exclude_comics:
            continue
        if contains_case_insensitive(res, name):
            # we cannot handle two comics that only differ in case
            print("INFO: skipping possible duplicate", repr(name), file=sys.stderr)
            continue
        # find out how many images this comic has
        end = match.end()
        mo = num_matcher.search(data[end:])
        if not mo:
            print("ERROR:", repr(data[end:end+300]), file=sys.stderr)
            continue
        num = int(mo.group(1))
        url = url_overrides.get(name, url)
        try:
            if "/d/" not in url:
                check_robotstxt(url+"d/", session)
            else:
                check_robotstxt(url, session)
        except IOError:
            print("INFO: robots.txt denied for comicgenesis", repr(name))
            continue
        else:
            res[name] = (url, num)