Configuring Simple Throttling

Add the following route to IG:

$HOME/.openig/config/routes/00-throttle-simple.json

%appdata%\OpenIG\config\routes\00-throttle-simple.json

{
  "name": "00-throttle-simple",
  "baseURI": "http://app.example.com:8081",
  "condition": "${matches(request.uri.path, '^/home/throttle-simple')}",
  "handler": {
    "type": "Chain",
    "config": {
      "filters": [
        {
          "type": "ThrottlingFilter",
          "name": "ThrottlingFilter-1",
          "config": {
            "requestGroupingPolicy": "",
            "rate": {
              "numberOfRequests": 6,
              "duration": "10 s"
            }
          }
        }
      ],
      "handler": "ReverseProxyHandler"
    }
  }
}

For information about how to set up the IG route in Studio, see "Simple Throttling Filter in Structured Editor".

Notice the following features of the route:

Test the setup:

1. With IG and the sample application running, use curl, a bash script, or another tool to access the following route in a loop: http://openig.example.com:8080/home/simple-throttle.

   Accessing the route in a loop runs the request multiple times in quick succession, allowing you to test the throttling rate.

   $ curl -v http://openig.example.com:8080/home/throttle-simple/\[01-10\] \
   > /tmp/simple-throttle.txt 2>&1

2. Search the output file to see the result:

   $ grep "< HTTP/1.1" /tmp/simple-throttle.txt | sort | uniq -c
   
   
   6 < HTTP/1.1 200 OK
   4 < HTTP/1.1 429 Too Many Requests

   Notice that the first six requests returned a success response, and the following four requests returned an HTTP 429 Too Many Requests. This result demonstrates that the throttling filter has allowed only six requests to access the application, and has blocked the other requests.