Validating request path parameter of AWS API gateway? - amazon-web-services

Question

Let's say I have an api with paths / and /{pets} and /{pets}/pet. Now I'm trying to validate the path {pets} parameter so that only path having alphanumerical characters of length 6 will be validated and processed to the backend lambda all others will be rejected. I tried the following swagger schema specifying format and type for the parameter. I even tried using pattern in the schema but it seems to be not working. May I know how can we limit only path parameters of certain IDs.
{
......
"/{pets}/pet": {
"get": {
"consumes": [
"application/json"
],
"produces": [
"application/json"
],
"parameters": [{
"name": "pets",
"in": "path",
"required": true,
"schema": {
"type": "string",
"pattern": "[A-Za-z0-9]{6}"
}
}],
"responses": {
"200": {
"description": "200 response",
"schema": {
"$ref": "#/definitions/Empty"
}
}
},
"x-amazon-apigateway-request-validator": "Validate query string parameters and headers",
"x-amazon-apigateway-integration": {
"responses": {
"default": {
"statusCode": "200"
}
},
"requestTemplates": {
"application/json": "## See ...."
},
"uri": "........",
"passthroughBehavior": "when_no_templates",
"httpMethod": "POST",
"contentHandling": "CONVERT_TO_TEXT",
"type": "aws"
}
}
}
.....
}
What I'm trying to achieve:
https://api.example.com/aacc77/pet -- Accept
https://api.example.com/aacc77s/pet -- Reject
https://api.example.com/aacc7/pet -- Reject
https://api.example.com/aacc_7/pet -- Reject
Basically, I want to use this regex pattern for the path [A-Za-z0-9]{6}.
"pets": {
"$schema": "http://json-schema.org/draft-04/schema#",
"title": "Pets Schema",
"type": "string",
"pattern": "[A-Za-z0-9]{6}"
}
I see that there is a related question here, I wonder whether there is a solution available for this.