{
  "$id": "http-request.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "HTTP Request Message",
  "description": "Schema describing the structure of an HTTP request message as defined in RFC 9110 (HTTP Semantics) and RFC 9112 (HTTP/1.1).",
  "type": "object",
  "required": [
    "method",
    "target"
  ],
  "properties": {
    "method": {
      "type": "string",
      "description": "The HTTP method indicating the desired action to be performed on the target resource (RFC 9110 Section 9).",
      "enum": [
        "GET",
        "HEAD",
        "POST",
        "PUT",
        "DELETE",
        "CONNECT",
        "OPTIONS",
        "TRACE",
        "PATCH"
      ]
    },
    "target": {
      "type": "string",
      "description": "The request target identifying the resource upon which to apply the request (RFC 9112 Section 3.2).",
      "examples": [
        "/api/resources",
        "/users/123",
        "https://example.com/api"
      ]
    },
    "httpVersion": {
      "type": "string",
      "description": "The HTTP version used for the request message (RFC 9112 Section 2.3).",
      "pattern": "^HTTP/[0-9]+(\\.[0-9]+)?$",
      "examples": [
        "HTTP/1.1",
        "HTTP/2",
        "HTTP/3"
      ]
    },
    "headers": {
      "type": "object",
      "description": "HTTP header fields that convey additional information about the request or the client (RFC 9110 Section 6.3).",
      "properties": {
        "Host": {
          "type": "string",
          "description": "The host and optional port of the target URI (RFC 9110 Section 7.2)."
        },
        "Content-Type": {
          "type": "string",
          "description": "The media type of the request body (RFC 9110 Section 8.3).",
          "examples": [
            "application/json",
            "application/x-www-form-urlencoded",
            "multipart/form-data"
          ]
        },
        "Content-Length": {
          "type": "integer",
          "description": "The size of the request body in bytes (RFC 9110 Section 8.6).",
          "minimum": 0
        },
        "Accept": {
          "type": "string",
          "description": "Media types acceptable for the response (RFC 9110 Section 12.5.1).",
          "examples": [
            "application/json",
            "text/html",
            "*/*"
          ]
        },
        "Authorization": {
          "type": "string",
          "description": "Credentials for authenticating the client with the server (RFC 9110 Section 11.6.2).",
          "examples": [
            "Bearer <token>",
            "Basic <credentials>"
          ]
        },
        "User-Agent": {
          "type": "string",
          "description": "Information about the user agent originating the request (RFC 9110 Section 10.1.5)."
        },
        "Cache-Control": {
          "type": "string",
          "description": "Directives for caching mechanisms in the request chain (RFC 9111 Section 5.2).",
          "examples": [
            "no-cache",
            "no-store",
            "max-age=3600"
          ]
        },
        "If-None-Match": {
          "type": "string",
          "description": "Conditional request based on entity tag comparison (RFC 9110 Section 13.1.2)."
        },
        "If-Modified-Since": {
          "type": "string",
          "description": "Conditional request based on modification date (RFC 9110 Section 13.1.3).",
          "format": "date-time"
        }
      },
      "additionalProperties": {
        "type": "string"
      }
    },
    "body": {
      "description": "The message body containing the payload data of the request (RFC 9110 Section 6.4)."
    }
  },
  "additionalProperties": false
}