GraphQL Complexity Limit

This policy allows you to add a limit for the depth and a limit for the complexity of a GraphQL query.

{
  "name": "my-graphql-complexity-limit-inbound-policy",
  "policyType": "graphql-complexity-limit-inbound",
  "handler": {
    "export": "GraphQLComplexityLimitInboundPolicy",
    "module": "$import(@zuplo/runtime)",
    "options": {
      "useComplexityLimit": [
        {}
      ],
      "useDepthLimit": [
        {
          "ignore": []
        }
      ]
    }
  }
}

Depth Limit

Limit the depth a GraphQL query is allowed to query for.

• maxDepth - Number of levels a GraphQL query is allowed to query for.

This allows you to limit the depth of a GraphQL query. This is useful to prevent DoS attacks on your GraphQL server.

{
  # Level 0
  me {
    # Level 1
    name
    friends {
      # Level 2
      name
      friends {
        # Level 3
        name
        # ...
      }
    }
  }
}

Complexity Limit

Example:

• maxComplexity - Maximum complexity allowed for a query.

{
  me {
    name  # Complexity +1
    age   # Complexity +1
    email # Complexity +1
    friends {
      name   # Complexity +1
      height # Complexity +1
    }
  }
}
# Total complexity = 5