def run()

in server/api/pages/bans.py [0:0]
87 lines of code
22 McCabe index (conditional complexity)

def run(API, environ, indata, session):
    global BANLIST, BAN_TS
    method = environ['REQUEST_METHOD']

    # Adding a new entry?
    if method == "PUT":
        ip = indata['source']
        reason = indata['reason']
        target = indata.get('target', '*')
        force = indata.get('force', False)
        submitter = environ.get('HTTP_PROXY_USER', 'Admin')
        reason = "Banned by %s: %s" % (submitter, reason)

        # Check if ban already exists
        if find_rule(session.DB, 'ban', ip):
            raise API.exception(400, "A ban already exists for this IP!")

        # Check if this IP is within a whitelisted space
        block = plugins.worker.to_block(ip)
        whitelist = plugins.worker.get_whitelist(session.DB)
        for white in whitelist:
            if block in white:
                if force:
                    remove_whitelist(session, white)
                else:
                    raise API.exception(403, "IP Address is whitelisted as %s, cannot ban!" % white)
            if white in block:
                if force:
                    remove_whitelist(session, white)
                else:
                    raise API.exception(403, "This ban would cancel whitelist entry for %s, cannot mix" % white)

        # all good? Okay, add the entry then
        entry = {
            'ip': ip,
            'reason': reason,
            'target': target,
            'epoch': int(time.time())
        }
        bid = plugins.worker.make_sha1(str(block))
        session.DB.ES.index(index=session.DB.dbname, doc_type = 'ban', id = bid, body = entry)
        plugins.worker.addnote(session.DB, 'manual', "Manual ban for %s added by %s: %s" % (ip, submitter, reason))
        yield json.dumps({"message": "Entry added!"})
        return


    # Delete an entry
    if method == "DELETE":
        submitter = environ.get('HTTP_PROXY_USER', 'Admin')
        rid = indata.get('rule')
        doc = None
        if re.match(r"^[a-f0-9]+$", rid):
            if session.DB.ES.exists(index=session.DB.dbname, doc_type='ban', id = rid):
                hit = session.DB.ES.get(index=session.DB.dbname, doc_type='ban', id = rid)
                plugins.worker.addnote(session.DB, 'manual', "Ban for %s removed by %s" % (hit['_source'].get('ip', rid), submitter))
                to_whitelist_temp(session.DB, hit)
                session.DB.ES.delete(index=session.DB.dbname, doc_type='ban', id = rid, refresh = 'wait_for')
            yield json.dumps({"message": "Entry removed"})
            return
        elif re.match(r"^[a-f0-9.:_]+$", rid):
            if session.DB.ES.exists(index=session.DB.dbname, doc_type='ban', id = rid):
                hit = session.DB.ES.get(index=session.DB.dbname, doc_type='ban', id = rid, refresh = 'wait_for')
                plugins.worker.addnote(session.DB, 'manual', "Ban for %s removed by %s" % (hit['_source'].get('ip', rid), submitter))
                to_whitelist_temp(session.DB, hit)
                session.DB.ES.delete(index=session.DB.dbname, doc_type='ban', id = rid)
            yield json.dumps({"message": "Entry removed"})
            return
        else:
            raise API.exception(400, "Invalid rule ID specified!")

    # Display the current banlist entries
    if method == "GET":
        # Only re-fetch banlist every 30 secs, save processing power!
        if BAN_TS < (time.time() - BAN_CACHE_TIME) or 'Mozilla' in environ.get('HTTP_USER_AGENT', 'python'):
            res = session.DB.ES.search(
                    index=session.DB.dbname,
                    doc_type="ban",
                    size = 10000,
                    body = {
                        'query': {
                            'match_all': {}
                        }
                    }
                )

            BANLIST = []
            for hit in res['hits']['hits']:
                doc = hit['_source']
                ip = doc.get('ip')
                if not ip:
                    ip = hit['_id'].replace('_', '/') # backwards compat
                if ip:
                    doc['ip'] = ip.strip()
                    doc['rid'] = hit['_id']
                    BANLIST.append(doc)
            BAN_TS = time.time()

        JSON_OUT = {
            'bans': BANLIST
        }
        yield json.dumps(JSON_OUT)
        return

    # Finally, if we hit a method we don't know, balk!
    yield API.exception(400, "I don't know this request method!!")