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update plugins doc (#1305)

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48
plugins/wasm-cpp/extensions/custom_response/README.md
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@@ -1,11 +1,19 @@
<p>
<a href="README_EN.md"> English </a> | 中文
</p>
---
title: 自定义应答
keywords: [higress,customn response]
description: 自定义应答插件配置参考
---
# 功能说明
## 功能说明
`custom-response`插件支持配置自定义的响应，包括自定义 HTTP 应答状态码、HTTP 应答头，以及 HTTP 应答 Body。可以用于 Mock 响应，也可以用于判断特定状态码后给出自定义应答，例如在触发网关限流策略时实现自定义响应。
# 配置字段
## 运行属性
插件执行阶段：`认证阶段`
插件执行优先级：`910`
## 配置字段
| 名称 | 数据类型 | 填写要求 | 默认值 | 描述 |
| -------- | -------- | -------- | -------- | -------- |
@@ -14,9 +22,9 @@
| body | string | 选填 | - | 自定义 HTTP 应答 Body |
| enable_on_status | array of number | 选填 | - | 匹配原始状态码，生成自定义响应，不填写时，不判断原始状态码 |
# 配置示例
## 配置示例
## Mock 应答场景
### Mock 应答场景
```yaml
status_code: 200
@@ -38,7 +46,7 @@ Content-Length: 17
{"hello":"world"}
```
## 触发限流时自定义响应
### 触发限流时自定义响应
```yaml
enable_on_status:
@@ -58,27 +66,3 @@ Location: https://example.com
从而实现基于浏览器 302 重定向机制，将限流后的用户引导到其他页面，比如可以是一个 CDN 上的静态页面。
如果希望触发限流时，正常返回其他应答，参考 Mock 应答场景配置相应的字段即可。
## 对特定路由或域名开启
```yaml
# 使用 _rules_ 字段进行细粒度规则配置
_rules_:
# 规则一：按路由名称匹配生效
- _match_route_:
- route-a
- route-b
body: "{\"hello\":\"world\"}"
# 规则二：按域名匹配生效
- _match_domain_:
- "*.example.com"
- test.com
enable_on_status:
- 429
status_code: 200
headers:
- Content-Type=application/json
body: "{\"errmsg\": \"rate limited\"}"
```
此例 `_match_route_` 中指定的 `route-a` 和 `route-b` 即在创建网关路由时填写的路由名称，当匹配到这两个路由时，将使用此段配置；
此例 `_match_domain_` 中指定的 `*.example.com` 和 `test.com` 用于匹配请求的域名，当发现域名匹配时，将使用此段配置；
配置的匹配生效顺序，将按照 `_rules_` 下规则的排列顺序，匹配第一个规则后生效对应配置，后续规则将被忽略。

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plugins/wasm-cpp/extensions/custom_response/README_EN.md
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<p>
English | <a href="README.md">中文</a>
</p>
---
title: Custom Response
keywords: [higress, custom response]
description: Custom response plugin configuration reference
---
## Function Description
The `custom-response` plugin supports the configuration of custom responses, including custom HTTP response status codes, HTTP response headers, and HTTP response bodies. It can be used for Mock responses or for providing custom responses based on specific status codes, such as implementing custom responses when triggering the gateway rate-limiting policy.
# Description
`custom-response` plugin implements a function of sending custom responses, including custom HTTP response status codes, HTTP response headers and HTTP response body, which can be used in the scenarios of response mocking and sending a custom response for specific status codes, such as customizing the response for rate-limited requests.
## Running Attributes
Plugin Execution Phase: `Authentication Phase`
# Configuration Fields
Plugin Execution Priority: `910`
| Name | Type | Requirement | Default Value | Description |
## Configuration Fields
| Name | Data Type | Requirements | Default Value | Description |
| -------- | -------- | -------- | -------- | -------- |
| status_code | number | Optional | 200 | Custom HTTP response status code |
| headers | array of string | Optional | - | Custom HTTP response header. Key and value shall be separated using `=`. |
| headers | array of string | Optional | - | Custom HTTP response headers, keys and values separated by `=` |
| body | string | Optional | - | Custom HTTP response body |
| enable_on_status | array of number | Optional | - | The original response status code to match. Generate the custom response only the actual status code matches the configuration. Ignore the status code match if left unconfigured. |
# Configuration Samples
## Mock Responses
| enable_on_status | array of number | Optional | - | Match original status codes to generate custom responses; if not specified, the original status code is not checked |
## Configuration Example
### Mock Response Scenario
```yaml
status_code: 200
headers:
- Content-Type=application/json
- Hello=World
body: "{\"hello\":\"world\"}"
```
According to the configuration above, all the requests will get the following custom response:
With this configuration, the request will return the following custom response:
```text
HTTP/1.1 200 OK
Content-Type: application/json
Hello: World
Content-Length: 17
{"hello":"world"}
```
## Send a Custom Response when Rate-Limited
### Custom Response on Rate Limiting
```yaml
enable_on_status:
enable_on_status:
- 429
status_code: 302
headers:
- Location=https://example.com
```
When rate-limited, normally gateway will return a status code of `429` . Now, rate-limited requests will get the following custom response:
When the gateway rate limiting is triggered, it generally returns the `429` status code, and the request will return the following custom response:
```text
HTTP/1.1 302 Found
Location: https://example.com
```
This achieves the goal of redirecting users who have been rate-limited to another page based on the browser's 302 redirect mechanism, which could be a static page on a CDN.
So based on the 302 redirecting mechanism provided by browsers, this can redirect rate-limited users to other pages, for example, a static page hosted on CDN.
If you'd like to send other responses when rate-limited, please add other fields into the configuration, referring to the Mock Responses scenario.
## Only Enabled for Specific Routes or Domains
```yaml
# Use _rules_ field for fine-grained rule configurations
_rules_:
# Rule 1: Match by route name
- _match_route_:
- route-a
- route-b
body: "{\"hello\":\"world\"}"
# Rule 2: Match by domain
- _match_domain_:
- "*.example.com"
- test.com
enable_on_status:
- 429
status_code: 200
headers:
- Content-Type=application/json
body: "{\"errmsg\": \"rate limited\"}"
```
In the rule sample of `_match_route_`, `route-a` and `route-b` are the route names provided when creating a new gateway route. When the current route names matches the configuration, the rule following shall be applied.
In the rule sample of `_match_domain_`, `*.example.com` and `test.com` are the domain names used for request matching. When the current domain name matches the configuration, the rule following shall be applied.
All rules shall be checked following the order of items in the `_rules_` field, The first matched rule will be applied. All remained will be ignored.
If you wish to return other responses normally when rate limiting is triggered, just refer to the Mock response scenario to configure the relevant fields accordingly.