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101 lines
4.5 KiB
Markdown
101 lines
4.5 KiB
Markdown
<!--
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# [Chinese](../zh-cn/plugins/cors.md)
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# Summary
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- [**Description**](#Description)
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- [**Attributes**](#Attributes)
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- [**How To Enable**](#how-to-Enable)
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- [**Test Plugin**](#test-plugin)
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- [**Disable Plugin**](#disable-plugin)
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## Description
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`cors` plugin can help you enable [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) easily.
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## Attributes
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- `allow_origins`: `optional`, Which Origins is allowed to enable CORS, format as：`scheme`://`host`:`port`, for example: https://somehost.com:8081. Multiple origin use `,` to split. When `allow_credential` is `false`, you can use `*` to indicate allow any origin. you alse can allow all any origins forcefully using `**` even already enable `allow_credential`, but it will bring some securiy risks. Default value: `*`.
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- `allow_methods`: `optional`, Which Method is allowed to enable CORS, such as: `GET`, `POST` etc. Multiple method use `,` to split. When `allow_credential` is `false`, you can use `*` to indicate allow all any method. You alse can allow any method forcefully using `**` even already enable `allow_credential`, but it will bring some securiy risks. Default value: `*`.
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- `allow_headers`: `optional`, Which headers are allowed to set in requst when access cross-origin resource. Multiple value use `,` to split. When `allow_credential` is `false`, you can use `*` to indicate allow all request headers. You alse can allow any header forcefully using `**` even already enable `allow_credential`, but it will bring some securiy risks. Default value: `*`.
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- `expose_headers`: `optional`, Which headers are allowed to set in response when access cross-origin resource. Multiple value use `,` to split. Default value: `*`.
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- `max_age`: `optional`, Maximum number of seconds the results can be cached.. Within this time range, the browser will reuse the last check result. `-1` means no cache. Please note that the maximum value is depended on browser, please refer to [MDN](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Max-Age#Directives) for details.Default value: `5`.
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- `allow_credential`: Enable request include credentia (such as Cookie etc.), Default avlue: `false`.According to CORS specification, if you set this option to `true`, you can not use '*' for other options.
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> **Tips**
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>
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> Please note that `allow_credential` is a very sensitive option, so choose to enable it carefully. After set it be `true`, the default `*` of other parameters will be invalid, you must specify their values explicitly.
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> When using `**`, you must fully understand that it introduces some security risks, such as CSRF, so make sure that this securiy level meets your expectations before using it。
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## How To Enable
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Create a `Route` or `Service` object and configure `cors` plugin.
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```shell
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curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
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"uri": "/hello",
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"plugins": {
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"cors": {}
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},
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"127.0.0.1:8080": 1
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}
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}
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}'
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```
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## Test Plugin
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curl to server, you will find the headers about `CORS` is be returned, it means plugin is working fine.
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```shell
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curl http://127.0.0.1:9080/hello -v
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...
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< Server: APISIX web server
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< Access-Control-Allow-Origin: *
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< Access-Control-Allow-Methods: *
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< Access-Control-Allow-Headers: *
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< Access-Control-Expose-Headers: *
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< Access-Control-Max-Age: 5
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...
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```
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## Disable Plugin
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Remove plugin from configuraion.
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```shell
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$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
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"uri": "/hello",
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"plugins": {},
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"127.0.0.1:8080": 1
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}
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}
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}'
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```
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