| -- |
| -- Licensed to the Apache Software Foundation (ASF) under one or more |
| -- contributor license agreements. See the NOTICE file distributed with |
| -- this work for additional information regarding copyright ownership. |
| -- The ASF licenses this file to You under the Apache License, Version 2.0 |
| -- (the "License"); you may not use this file except in compliance with |
| -- the License. You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| local require = require |
| local core = require("apisix.core") |
| local ok, apisix_ngx_client = pcall(require, "resty.apisix.client") |
| local tonumber = tonumber |
| |
| |
| local schema = { |
| type = "object", |
| properties = { |
| max_body_size = { |
| type = "integer", |
| minimum = 0, |
| }, |
| }, |
| } |
| |
| |
| local plugin_name = "client-control" |
| |
| |
| local _M = { |
| version = 0.1, |
| priority = 22000, |
| name = plugin_name, |
| schema = schema, |
| } |
| |
| |
| function _M.check_schema(conf) |
| return core.schema.check(schema, conf) |
| end |
| |
| |
| function _M.rewrite(conf, ctx) |
| if not ok then |
| core.log.error("need to build APISIX-Base to support client control") |
| return 501 |
| end |
| |
| if conf.max_body_size then |
| local len = tonumber(core.request.header(ctx, "Content-Length")) |
| if len then |
| -- if length is given in the header, check it immediately |
| if conf.max_body_size ~= 0 and len > conf.max_body_size then |
| return 413 |
| end |
| end |
| |
| -- then check it when reading the body |
| local ok, err = apisix_ngx_client.set_client_max_body_size(conf.max_body_size) |
| if not ok then |
| core.log.error("failed to set client max body size: ", err) |
| return 503 |
| end |
| end |
| end |
| |
| |
| return _M |