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"""Rest API utilities module.""" |
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# pylint: disable=self-assigning-variable |
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import asyncio |
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import json |
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from asyncio import AbstractEventLoop |
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from datetime import datetime |
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from typing import Any, Optional |
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from starlette.exceptions import HTTPException |
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from starlette.requests import Request |
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from starlette.responses import JSONResponse as StarletteJSONResponse |
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def _json_serializer(obj): |
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if isinstance(obj, datetime): |
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return obj.isoformat() |
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if isinstance(obj, set): |
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return sorted(obj) |
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raise TypeError(f"Type {type(obj)} not serializable") |
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def get_body( |
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request: Request, loop: AbstractEventLoop, timeout: Optional[float] = None |
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) -> bytes: |
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"""Try to get request.body form a sync @rest route.""" |
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future = asyncio.run_coroutine_threadsafe(request.body(), loop) |
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return future.result(timeout) |
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def get_json( |
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request: Request, loop: AbstractEventLoop, timeout: Optional[float] = None |
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) -> Any: |
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"""Try to get request.json from a sync @rest route. |
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It might raise json.decoder.JSONDecodeError. |
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""" |
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future = asyncio.run_coroutine_threadsafe(request.json(), loop) |
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return future.result(timeout) |
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def get_json_or_400( |
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request: Request, loop: AbstractEventLoop, timeout: Optional[float] = None |
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) -> Any: |
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"""Try to get request.json from a sync @rest route or HTTPException 400.""" |
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try: |
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return get_json(request, loop, timeout) |
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except (json.decoder.JSONDecodeError, TypeError) as exc: |
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raise HTTPException(400, detail=f"Invalid json: {str(exc)}") |
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async def aget_json_or_400(request: Request) -> Any: |
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"""Try to get request.json from async @rest route or HTTPException 400.""" |
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try: |
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return await request.json() |
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except (json.decoder.JSONDecodeError, TypeError) as exc: |
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raise HTTPException(400, detail=f"Invalid json: {str(exc)}") |
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def content_type_json_or_415(request: Request) -> Optional[str]: |
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"""Ensures request Content-Type is application/json or raises 415.""" |
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content_type = request.headers.get("Content-Type", "") |
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content_types = content_type.split(";") |
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if "application/json" not in content_types: |
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err = "Expected Content-Type: application/json, " \ |
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f"got: {content_type}" |
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raise HTTPException(415, detail=err) |
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return content_type |
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def error_msg(error_list: list) -> str: |
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"""Return a more request friendly error message from ValidationError""" |
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msg = "" |
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for err in error_list: |
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for value in err['loc']: |
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msg += str(value) + ", " |
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msg = msg[:-2] |
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msg += ": " + err["msg"] + "; " |
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return msg[:-2] |
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class JSONResponse(StarletteJSONResponse): |
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"""JSONResponse with custom default serializer that supports datetime.""" |
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media_type = "application/json" |
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def render(self, content) -> bytes: |
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return json.dumps( |
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content, |
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ensure_ascii=False, |
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allow_nan=False, |
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indent=None, |
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separators=(",", ":"), |
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default=_json_serializer, |
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).encode("utf-8") |
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kytos-ng /
kytos
