{
  "$id": "http-response.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "HTTP Response Message",
  "description": "Schema describing the structure of an HTTP response message as defined in RFC 9110 (HTTP Semantics) and RFC 9112 (HTTP/1.1).",
  "type": "object",
  "required": [
    "statusCode"
  ],
  "properties": {
    "httpVersion": {
      "type": "string",
      "description": "The HTTP version used for the response message (RFC 9112 Section 2.3).",
      "pattern": "^HTTP/[0-9]+(\\.[0-9]+)?$",
      "examples": [
        "HTTP/1.1",
        "HTTP/2",
        "HTTP/3"
      ]
    },
    "statusCode": {
      "type": "integer",
      "description": "The three-digit integer status code indicating the result of the request (RFC 9110 Section 15).",
      "minimum": 100,
      "maximum": 599,
      "examples": [
        200,
        201,
        301,
        400,
        404,
        500
      ]
    },
    "reasonPhrase": {
      "type": "string",
      "description": "A textual description associated with the status code (RFC 9112 Section 4). Primarily for human consumption in HTTP/1.1; absent in HTTP/2 and HTTP/3.",
      "examples": [
        "OK",
        "Created",
        "Not Found",
        "Internal Server Error"
      ]
    },
    "headers": {
      "type": "object",
      "description": "HTTP header fields that convey additional information about the response or the server (RFC 9110 Section 6.3).",
      "properties": {
        "Content-Type": {
          "type": "string",
          "description": "The media type of the response body (RFC 9110 Section 8.3).",
          "examples": [
            "application/json",
            "text/html; charset=utf-8",
            "application/problem+json"
          ]
        },
        "Content-Length": {
          "type": "integer",
          "description": "The size of the response body in bytes (RFC 9110 Section 8.6).",
          "minimum": 0
        },
        "Cache-Control": {
          "type": "string",
          "description": "Directives for caching mechanisms in the response chain (RFC 9111 Section 5.2).",
          "examples": [
            "public, max-age=3600",
            "no-cache",
            "private, no-store"
          ]
        },
        "ETag": {
          "type": "string",
          "description": "An opaque validator for the current representation of the target resource (RFC 9110 Section 8.8.3).",
          "examples": [
            "\"33a64df5\"",
            "W/\"0815\""
          ]
        },
        "Last-Modified": {
          "type": "string",
          "description": "The date and time the resource was last modified (RFC 9110 Section 8.8.2).",
          "format": "date-time"
        },
        "Location": {
          "type": "string",
          "description": "A URI reference for redirects or newly created resources (RFC 9110 Section 10.2.2).",
          "format": "uri-reference"
        },
        "WWW-Authenticate": {
          "type": "string",
          "description": "Indicates the authentication scheme(s) and parameters applicable to the target resource (RFC 9110 Section 11.6.1)."
        },
        "Retry-After": {
          "type": "string",
          "description": "Indicates how long the client should wait before making a follow-up request (RFC 9110 Section 10.2.3)."
        },
        "Age": {
          "type": "integer",
          "description": "The estimated time in seconds since the response was generated or validated by the origin server (RFC 9111 Section 5.1).",
          "minimum": 0
        },
        "Vary": {
          "type": "string",
          "description": "Describes the parts of the request that influenced the response content (RFC 9110 Section 12.5.5).",
          "examples": [
            "Accept",
            "Accept-Encoding",
            "Origin"
          ]
        }
      },
      "additionalProperties": {
        "type": "string"
      }
    },
    "body": {
      "description": "The message body containing the payload data of the response (RFC 9110 Section 6.4)."
    }
  },
  "additionalProperties": false
}