| -- |
| -- 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 ipairs = ipairs |
| local pcall = pcall |
| local loadstring = loadstring |
| local require = require |
| local type = type |
| |
| return function(plugin_name, priority) |
| local core = require("apisix.core") |
| |
| |
| local lrucache = core.lrucache.new({ |
| type = "plugin", |
| }) |
| |
| local schema = { |
| type = "object", |
| properties = { |
| phase = { |
| type = "string", |
| default = "access", |
| enum = {"rewrite", "access", "header_filter", "body_filter", |
| "log", "balancer"} |
| }, |
| functions = { |
| type = "array", |
| items = {type = "string"}, |
| minItems = 1 |
| }, |
| }, |
| required = {"functions"} |
| } |
| |
| local _M = { |
| version = 0.1, |
| priority = priority, |
| name = plugin_name, |
| schema = schema, |
| } |
| |
| local function load_funcs(functions) |
| local funcs = core.table.new(#functions, 0) |
| |
| local index = 1 |
| for _, func_str in ipairs(functions) do |
| local _, func = pcall(loadstring(func_str)) |
| funcs[index] = func |
| index = index + 1 |
| end |
| |
| return funcs |
| end |
| |
| local function call_funcs(phase, conf, ctx) |
| if phase ~= conf.phase then |
| return |
| end |
| |
| local functions = core.lrucache.plugin_ctx(lrucache, ctx, nil, |
| load_funcs, conf.functions) |
| |
| for _, func in ipairs(functions) do |
| func(conf, ctx) |
| end |
| end |
| |
| function _M.check_schema(conf) |
| local ok, err = core.schema.check(schema, conf) |
| if not ok then |
| return false, err |
| end |
| |
| local functions = conf.functions |
| for _, func_str in ipairs(functions) do |
| local func, err = loadstring(func_str) |
| if err then |
| return false, 'failed to loadstring: ' .. err |
| end |
| |
| local ok, ret = pcall(func) |
| if not ok then |
| return false, 'pcall error: ' .. ret |
| end |
| if type(ret) ~= 'function' then |
| return false, 'only accept Lua function,' |
| .. ' the input code type is ' .. type(ret) |
| end |
| end |
| |
| return true |
| end |
| |
| function _M.rewrite(conf, ctx) |
| call_funcs('rewrite', conf, ctx) |
| end |
| |
| function _M.access(conf, ctx) |
| call_funcs('access', conf, ctx) |
| end |
| |
| function _M.balancer(conf, ctx) |
| call_funcs('balancer', conf, ctx) |
| end |
| |
| function _M.header_filter(conf, ctx) |
| call_funcs('header_filter', conf, ctx) |
| end |
| |
| function _M.body_filter(conf, ctx) |
| call_funcs('body_filter', conf, ctx) |
| end |
| |
| function _M.log(conf, ctx) |
| call_funcs('log', conf, ctx) |
| end |
| |
| return _M |
| end |