329 lines
13 KiB
Python
329 lines
13 KiB
Python
"""HTTP control/query adapter for the contract-defined non-execution endpoints."""
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from __future__ import annotations
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import json
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import os
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from http import HTTPStatus
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from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
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from typing import Any
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from urllib.parse import unquote, urlsplit
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from .core import AgentCallService, ServiceError, ValidationError, _integer, _loads
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READ_SCOPE = "outbound.read"
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CONTROL_SCOPE = "outbound.control"
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UPLOAD_SCOPE = "recording.upload"
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COMPLETE_SCOPE = "recording.complete"
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class AgentCallHandler(BaseHTTPRequestHandler):
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service: AgentCallService
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server_version = "agent-call/0.1"
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def log_message(self, format: str, *args: Any) -> None:
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# Request IDs are enough for local diagnostics; never log auth headers or bodies.
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return
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def _request_id(self) -> str:
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value = self.headers.get("X-Request-ID", "")
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if not value or len(value) > 128 or any(ch.isspace() for ch in value):
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raise ServiceError("REQUEST_ID_REQUIRED", "X-Request-ID is required", 400)
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return value
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def _tenant_id(self) -> str:
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value = self.headers.get("X-Tenant-ID", "")
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if not value or len(value) > 128 or any(ch.isspace() for ch in value):
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raise ServiceError("TENANT_ID_REQUIRED", "X-Tenant-ID is required", 400)
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return value
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def _authorize(self, scope: str, tenant_id: str | None = None) -> None:
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token_header = self.headers.get("Authorization", "")
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if not token_header.startswith("Bearer "):
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raise ServiceError("UNAUTHORIZED", "bearer authentication is required", 401)
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token = token_header[7:]
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token_map = _loads(os.environ.get("HTTP_TOKENS"), {})
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if not isinstance(token_map, dict):
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raise ServiceError("UNAUTHORIZED", "token configuration is invalid", 401)
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identity = token_map.get(token)
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if not isinstance(identity, dict):
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raise ServiceError("UNAUTHORIZED", "bearer token is not authorized", 401)
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scopes = identity.get("scopes", [])
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if scope not in scopes and "*" not in scopes:
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raise ServiceError("FORBIDDEN", "required scope is missing", 403)
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if tenant_id is not None:
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tenant_ids = identity.get("tenant_ids", [])
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if "*" not in tenant_ids and tenant_id not in tenant_ids:
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raise ServiceError("FORBIDDEN", "tenant scope is missing", 403)
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def _body(self) -> dict[str, Any]:
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raw_length = self.headers.get("Content-Length")
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if not raw_length:
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raise ValidationError("BODY_REQUIRED", "JSON request body is required")
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length = _integer(raw_length)
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if length < 1 or length > self.service.profile.get("limits", {}).get(
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"max_http_bytes", 65536
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):
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raise ServiceError(
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"BODY_TOO_LARGE", "request body exceeds the HTTP limit", 413
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)
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try:
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raw = self.rfile.read(length)
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body = _loads(raw.decode("utf-8"))
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except UnicodeDecodeError as exc:
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raise ValidationError(
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"INVALID_JSON", "request body must be UTF-8 JSON"
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) from exc
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if not isinstance(body, dict):
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raise ValidationError("INVALID_JSON", "request body must be a JSON object")
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return body
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def _header(self, name: str) -> str:
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value = self.headers.get(name, "")
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if not value:
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raise ServiceError("HEADER_REQUIRED", f"{name} is required", 400)
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return value
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def _send(
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self, status: int, body: Any, content_type: str = "application/json"
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) -> None:
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encoded = json.dumps(
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body, ensure_ascii=False, sort_keys=True, separators=(",", ":")
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).encode("utf-8")
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self.send_response(status)
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self.send_header("Content-Type", f"{content_type}; charset=utf-8")
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self.send_header("Content-Length", str(len(encoded)))
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self.send_header("Cache-Control", "no-store")
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self.end_headers()
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self.wfile.write(encoded)
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def _send_text(self, status: int, body: str, content_type: str) -> None:
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encoded = body.encode("utf-8")
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self.send_response(status)
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self.send_header("Content-Type", content_type)
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self.send_header("Content-Length", str(len(encoded)))
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self.send_header("Cache-Control", "no-store")
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self.end_headers()
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self.wfile.write(encoded)
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def _error(self, exc: ServiceError, request_id: str | None = None) -> None:
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body = {
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"type": "about:blank",
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"title": HTTPStatus(exc.status).phrase
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if exc.status in HTTPStatus._value2member_map_
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else "Request failed",
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"status": exc.status,
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"code": exc.code,
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"detail": exc.detail,
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"request_id": request_id or self.headers.get("X-Request-ID", "unknown"),
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"retryable": exc.retryable,
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}
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try:
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self._send(exc.status, body, "application/problem+json")
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except (BrokenPipeError, ConnectionResetError):
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return
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def _dispatch(self, method: str) -> None:
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request_id: str | None = None
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try:
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path = urlsplit(self.path).path
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parts = [unquote(part) for part in path.split("/") if part]
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if method == "GET" and path == "/healthz/live":
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self._send(200, {"status": "live", "mode": self.service.mode})
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return
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if method == "GET" and path == "/healthz/ready":
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if not self.service.ready():
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raise ServiceError(
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"NOT_READY", "dependency health check failed", 503, True
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)
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self._send(200, {"status": "ready", "mode": self.service.mode})
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return
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if method == "GET" and path == "/metrics":
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self._send_text(
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200, self.service.metrics(), "text/plain; version=0.0.4"
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)
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return
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if not (
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method == "PUT" and len(parts) == 3 and parts[:2] == ["_mock", "oss"]
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):
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request_id = self._request_id()
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if (
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method == "GET"
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and len(parts) == 5
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "commands"
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):
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tenant_id = self._tenant_id()
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self._authorize(READ_SCOPE, tenant_id)
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self._send(200, self.service.get_command(tenant_id, parts[4]))
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return
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if (
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method == "GET"
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and len(parts) == 5
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "calls"
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):
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tenant_id = self._tenant_id()
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self._authorize(READ_SCOPE, tenant_id)
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self._send(200, self.service.get_call(tenant_id, parts[4]))
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return
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if (
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method == "POST"
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and len(parts) == 6
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "tasks"
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and parts[5] == "controls"
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):
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tenant_id = self._tenant_id()
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self._authorize(CONTROL_SCOPE, tenant_id)
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body = self._body()
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command_id = self._header("Idempotency-Key")
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result = self.service.control_task(
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tenant_id,
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parts[4],
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body,
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command_id,
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allow_hangup=self._has_scope("outbound.hangup", tenant_id),
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)
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self._send(202, result)
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return
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if (
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method == "POST"
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and len(parts) == 6
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "calls"
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and parts[5] == "replays"
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):
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tenant_id = self._tenant_id()
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self._authorize(CONTROL_SCOPE, tenant_id)
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result = self.service.create_replay(
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tenant_id,
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"call",
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parts[4],
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self._body(),
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self._header("Idempotency-Key"),
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)
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self._send(202, result)
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return
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if (
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method == "POST"
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and len(parts) == 6
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "commands"
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and parts[5] == "replays"
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):
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tenant_id = self._tenant_id()
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self._authorize(CONTROL_SCOPE, tenant_id)
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result = self.service.create_replay(
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tenant_id,
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"command",
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parts[4],
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self._body(),
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self._header("Idempotency-Key"),
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)
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self._send(202, result)
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return
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if (
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method == "POST"
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and len(parts) == 4
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "recording-uploads"
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):
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tenant_id = self._tenant_id()
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self._authorize(UPLOAD_SCOPE, tenant_id)
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result_status, result = self.service.create_upload(
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tenant_id, self._body()
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)
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self._send(result_status, result)
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return
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if (
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method == "POST"
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and len(parts) == 6
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and parts[:3] == ["internal", "v1", "outbound"]
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and parts[3] == "recording-uploads"
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and parts[5] == "complete"
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):
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tenant_id = self._tenant_id()
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self._authorize(COMPLETE_SCOPE, tenant_id)
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result = self.service.complete_upload(tenant_id, parts[4], self._body())
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self._send(200, result)
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return
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if method == "PUT" and len(parts) == 3 and parts[:2] == ["_mock", "oss"]:
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if self.service.mode == "real":
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raise ServiceError(
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"MOCK_DISABLED",
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"mock object storage is disabled in real mode",
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404,
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)
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token = self._header("X-Mock-Upload-Token")
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raw_length = self.headers.get("Content-Length")
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if not raw_length:
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raise ValidationError("BODY_REQUIRED", "upload body is required")
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length = _integer(raw_length)
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if length > self.service.profile.get("limits", {}).get(
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"recording_max_bytes", 16777216
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):
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raise ServiceError(
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"BODY_TOO_LARGE",
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"recording exceeds the configured size limit",
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413,
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)
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try:
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data = self.rfile.read(length)
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except (BrokenPipeError, ConnectionResetError) as exc:
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raise ServiceError(
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"UPLOAD_INTERRUPTED", "upload connection interrupted", 400
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) from exc
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upload = self.service.store.one(
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"SELECT tenant_id FROM uploads WHERE upload_id=?", (parts[2],)
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)
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if upload is None:
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raise ServiceError("NOT_FOUND", "upload session not found", 404)
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self.service.put_upload(parts[2], token, data)
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self._send(200, {"status": "uploaded", "upload_id": parts[2]})
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return
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raise ServiceError("NOT_FOUND", "route not found", 404)
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except ServiceError as exc:
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self._error(exc, request_id)
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except (BrokenPipeError, ConnectionResetError):
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return
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except Exception:
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self._error(
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ServiceError("INTERNAL_ERROR", "request could not be completed", 500),
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request_id,
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)
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def _has_scope(self, scope: str, tenant_id: str) -> bool:
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token_header = self.headers.get("Authorization", "")
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if not token_header.startswith("Bearer "):
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return False
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token_map = _loads(os.environ.get("HTTP_TOKENS"), {})
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identity = (
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token_map.get(token_header[7:]) if isinstance(token_map, dict) else None
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)
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if not isinstance(identity, dict):
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return False
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tenant_ids = identity.get("tenant_ids", [])
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return ("*" in tenant_ids or tenant_id in tenant_ids) and (
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scope in identity.get("scopes", []) or "*" in identity.get("scopes", [])
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)
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def do_GET(self) -> None:
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self._dispatch("GET")
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def do_POST(self) -> None:
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self._dispatch("POST")
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def do_PUT(self) -> None:
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self._dispatch("PUT")
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def make_server(
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service: AgentCallService, host: str = "127.0.0.1", port: int = 8080
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) -> ThreadingHTTPServer:
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class BoundHandler(AgentCallHandler):
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pass
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BoundHandler.service = service
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return ThreadingHTTPServer((host, port), BoundHandler)
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