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proxy-rewrite.md

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proxy-rewrite
Apache APISIX
API Gateway
Plugin
Proxy Rewrite
proxy-rewrite
This document contains information about the Apache APISIX proxy-rewrite Plugin.

Description

The proxy-rewrite Plugin rewrites Upstream proxy information such as scheme, uri and host.

Attributes

Name Type Required Default Valid values Description
uri string False New Upstream forwarding address. Value supports Nginx variables. For example, $arg_name.
method string False ["GET", "POST", "PUT", "HEAD", "DELETE", "OPTIONS","MKCOL", "COPY", "MOVE", "PROPFIND", "PROPFIND","LOCK", "UNLOCK", "PATCH", "TRACE"] Rewrites the HTTP method.
regex_uri array[string] False Regular expressions can be used to match the URL from client. If it matches, the URL template is forwarded to the upstream. Otherwise, the URL from the client is forwarded. When both uri and regex_uri are configured, uri has a higher priority. Multiple regular expressions are currently supported for pattern matching, and the plugin will try to match them one by one until they succeed or all fail. For example: ["^/iresty/(. *)/(. *)/(. *)", "/$1-$2-$3", ^/theothers/(. *)/(. *)", "/theothers/$1-$2"], the element with the odd index represents the uri regular expression that matches the request from the client, and the element with the even index represents the uri template that is forwarded upstream upon a successful match. Please note that the length of this value must be an even number.
host string False New Upstream host address.
headers object False
headers.add object false Append the new headers. The format is {"name": "value",...}. The values in the header can contain Nginx variables like $remote_addr and $balancer_ip. It also supports referencing the match result of regex_uri as a variable like $1-$2-$3.
headers.set object false Overwrite the headers. If the header does not exist, it will be added. The format is {"name": "value", ...}. The values in the header can contain Nginx variables like $remote_addr and $balancer_ip. It also supports referencing the match result of regex_uri as a variable like $1-$2-$3.
headers.remove array false Remove the headers. The format is ["name", ...].
use_real_request_uri_unsafe boolean False false Use real_request_uri (original $request_uri in nginx) to bypass URI normalization. Enabling this is considered unsafe as it bypasses all URI normalization steps.

Header Priority

Header configurations are executed according to the following priorities:

add > remove > set

Enable Plugin

The example below enables the proxy-rewrite Plugin on a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["GET"],
    "uri": "/test/index.html",
    "plugins": {
        "proxy-rewrite": {
            "uri": "/test/home.html",
            "host": "iresty.com",
            "headers": {
               "set": {
                    "X-Api-Version": "v1",
                    "X-Api-Engine": "apisix",
                    "X-Api-useless": ""
                },
                "add": {
                    "X-Request-ID": "112233"
                },
                "remove":[
                    "X-test"
                ]
            }
        }
    },
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:80": 1
        }
    }
}'

Example usage

Once you have enabled the Plugin as mentioned below, you can test the Route:

curl -X GET http://127.0.0.1:9080/test/index.html

Once you send the request, you can check the Upstream access.log for its output:

127.0.0.1 - [26/Sep/2019:10:52:20 +0800] iresty.com GET /test/home.html HTTP/1.1 200 38 - curl/7.29.0 - 0.000 199 107

Delete Plugin

To remove the proxy-rewrite Plugin, you can delete the corresponding JSON configuration from the Plugin configuration. APISIX will automatically reload and you do not have to restart for this to take effect.

curl http://127.0.0.1:9180/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["GET"],
    "uri": "/test/index.html",
    "plugins": {},
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:80": 1
        }
    }
}'