echo

Description

echo is a useful plugin to help users understand as fully as possible how to develop an APISIX plugin.

This plugin addresses the corresponding functionality in the common phases such as init, rewrite, access, balancer, header filter, body filter and log.

NOTE: echo plugin is written as an example. There are some unhandled cases and you should not use it in the production!

Attributes

Name	Type	Requirement	Default	Valid	Description
before_body	string	optional			Body before the filter phase.
body	string	optional			Body to replace upstream response.
after_body	string	optional			Body after the modification of filter phase.
headers	object	optional			New headers for response

At least one of before_body, body, and after_body must be specified.

How To Enable

The following is an example on how to enable the echo plugin for a specific route.

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"
}'

Test Plugin

• success:

$ curl -i http://127.0.0.1:9080/hello
HTTP/1.1 200 OK
...
before the body modification hello world

Disable Plugin

Remove the corresponding json configuration in the plugin configuration to disable the echo. APISIX plugins are hot-reloaded, therefore no need to restart APISIX.

$ 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
        }
    }
}'