2019-11-21 21:49:53 +08:00
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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 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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-->
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[English](response-rewrite.md)
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# response-rewrite
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该插件支持修改上游服务返回的 body 和 header 信息。
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使用场景：
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1、可以设置 `Access-Control-Allow-*` 等 header 信息，来实现 CORS (跨域资源共享)的功能。
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2、另外也可以通过配置 status_code 和 header 里面的 Location 来实现重定向，当然如果只是需要重定向功能，最好使用 [redirect](redirect-cn.md) 插件。
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#### 配置参数
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|名字 |可选|说明|
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|------- |-----|------|
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|status_code |可选| 修改上游返回状态码|
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|body |可选| 修改上游返回的 `body` 内容，如果设置了新内容，header 里面的 content-length 字段也会被去掉|
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|headers |可选| 返回给客户端的 `headers`，这里可以设置多个。头信息如果存在将重写，不存在则添加。想要删除某个 header 的话，把对应的值设置为空字符串即可|
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### 示例
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#### 开启插件
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下面是一个示例，在指定的 route 上开启了 `response rewrite` 插件:
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```shell
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2020-03-05 14:48:27 +08:00
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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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2019-11-21 21:49:53 +08:00
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{
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"methods": ["GET"],
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"uri": "/test/index.html",
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"plugins": {
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"response-rewrite": {
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"body": "{\"code\":\"ok\",\"message\":\"new json body\"}",
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"headers": {
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"X-Server-id": 3,
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"X-Server-status": "on"
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}
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}
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},
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"127.0.0.1:80": 1
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}
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}
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}'
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```
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#### 测试插件
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基于上述配置进行测试：
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```shell
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curl -X GET -i http://127.0.0.1:9080/test/index.html
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```
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如果看到返回的头部信息和内容都被修改了，即表示 `response rewrite` 插件生效了。
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```
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HTTP/1.1 200 OK
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Date: Sat, 16 Nov 2019 09:15:12 GMT
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Transfer-Encoding: chunked
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Connection: keep-alive
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X-Server-id: 3
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X-Server-status: on
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{"code":"ok","message":"new json body"}
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```
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