blob: c818007f5ea2392f88e0e64f27c71aed0f0aa422 [file] [view]
---
title: echo
keywords:
- APISIX
- Plugin
- Echo
description: 本文介绍了关于 Apache APISIX `echo` 插件的基本信息及使用方法。
---
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## 描述
`echo` 插件可以帮助用户尽可能地全面了解如何开发 APISIX 插件。
该插件展示了如何在常见的 `phase` 中实现相应的功能,常见的 `phase` 包括:init, rewrite, access, balancer, header filter, body filter 以及 log
:::caution WARNING
`echo` 插件只能用作示例,并不能处理一些特别的场景。**请勿将该插件用在生产环境中!**
:::
## 属性
| 名称 | 类型 | 必选项 | 描述 |
| ----------- | ------ | ------ | ----------------------------------------------------------------------------------------------- |
| before_body | string | | `body` 属性之前添加的内容,如果 `body` 属性没有指定,就会将其添加在上游 `response body` 之前。 |
| body | string | | 返回给客户端的响应内容,它将覆盖上游返回的响应 `body` |
| after_body | string | | `body` 属性之后添加的内容,如果 body 属性没有指定将在上游响应 `body` 之后添加。 |
| headers | object | | 返回值的 headers |
:::note
参数 `before_body``body` `after_body` 至少要配置一个。
:::
## 启用插件
以下示例展示了如何在指定路由中启用 `echo` 插件。
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"echo": {
"before_body": "before the body modification "
}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1
},
"type": "roundrobin"
},
"uri": "/hello"
}'
```
## 测试插件
通过上述命令启用插件后,你可以使用如下命令测试插件是否启用成功:
```shell
curl -i http://127.0.0.1:9080/hello
```
```
HTTP/1.1 200 OK
...
before the body modification hello world
```
## 禁用插件
当你需要禁用 `echo` 插件时,可通过以下命令删除相应的 JSON 配置,APISIX 将会自动重新加载相关配置,无需重启服务:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/hello",
"plugins": {},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:1980": 1
}
}
}'
```