how to use request validator plugin to validate whether a custom header is equal to an integer

How to use the request-validator plugin to validate whether a custom header is equal to an integer?

1. Write the below JSON file called header-equal-int.json. The following config requires that the x-h1 header value is 1. Replace x-h1 and 1 with your actual values:

   {
     "name": "request-validator",
     "config": {
       "version": "draft4",
       "parameter_schema": [
         {
           "name": "x-h1",
           "in": "header",
           "required": true,
           "schema": "{\"type\": \"number\", \"minimum\": 1, \"maximum\": 1}",
           "style": "simple",
           "explode": false
         }
       ]
     }
   }

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2. Enable the request-validator plugin on your route with the JSON file above:

   curl -X POST http://{KONG}:8001/routes/{ROUTE}/plugins \
       -H "Content-Type: application/json" \
       --data @header-equal-int.json

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   You could also patch the above JSON file to an existing request-validator plugin:

   curl -X PATCH http://{KONG}:8001/plugins/<PLUGIN-ID> \
       -H "Content-Type: application/json" \
       --data @header-equal-int.json

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3. Testing:

   ❯ curl <KONG>:8000/{ROUTE} -H "x-h1:2"
   {"message":"request param doesn't conform to schema"}%
   
   ❯ curl <KONG>:8000/{ROUTE} -H "x-h1:0"
   {"message":"request param doesn't conform to schema"}%
   
   ❯ curl <KONG>:8000/{ROUTE} -H "x-h1:a"
   {"message":"request param doesn't conform to schema"}
   
   ❯ curl <KONG>:8000/{ROUTE} -H "x-h1:1"
   200 response

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   Confirmed Kong will proxy the request to upstreams only when x-h1 equals 1.