| -- 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. |
| |
| -- Example Lua remap plugin. Load this with the following remap.comfig line: |
| -- |
| -- map http://test.foo.com http://foo.foo.com @plugin=lua.so @pparam=/path/to/example.lua |
| |
| -- Pull in the Traffic Server API. |
| local TS = require 'ts' |
| |
| require 'string' |
| require 'math' |
| |
| -- Compulsory remap hook. We are given a request object that we can modify if necessary. |
| function remap(request) |
| -- Get a copy of the current URL. |
| url = request:url() |
| |
| TS.debug('example', string.format('remapping %s://%s', url.scheme, url.host)) |
| |
| -- Do some header manipulation, just to mess with the origin. |
| request.headers['added-bool'] = true |
| request.headers['added-int'] = 1 |
| request.headers['added-string'] = 'ttt' |
| request.headers['added-table'] = {} |
| request.headers['deleted'] = nil |
| |
| -- We can also print to stdout using Lua standard library. |
| print(string.format('request URL is %s://%s:%d/%s', |
| url.scheme, url.host, url.port, url.path and url.path or '')) |
| |
| -- Modify components of the URL ... everybody loves slashdot. |
| url.host = 'www.slashdot.org' |
| url.port = 80 |
| url.method = 'POST' |
| |
| -- Plugin chain evaluation rules: |
| -- redirect: plugin chain terminates |
| -- reject: plugin chain terminates |
| -- rewrite: plugin chain continues |
| |
| chance = math.random(4) |
| if chance == 1 then |
| -- Send a 301 redirect to the new URL. |
| request:redirect(url) |
| elseif chance == 2 then |
| -- Reject the request with an optional message. |
| request:reject(400, "Denied") |
| elseif chance == 3 then |
| -- Reject the request with a response body. We sniff the body to set the content type. |
| request:reject(500, [[ |
| <HEAD></TITLE></HEAD> |
| <BODY>Internal error, sorry</BODY> |
| ]]) |
| else |
| -- Rewrite the request URL. The remap plugin chain continues and other plugins |
| request:rewrite(url) |
| end |
| |
| end |
