#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

import sys
from pathlib import Path

import requests


class AbstractReader:
    def __init__(self, path: str):
        self._path = path

    def read(self) -> str:
        raise NotImplementedError()


class HttpReader(AbstractReader):
    def read(self) -> str:
        resp = requests.get(self._path)
        resp.raise_for_status()
        return resp.text


class KnownReader(AbstractReader):
    def read(self) -> str:
        return self._path


class StdioReader(AbstractReader):
    def read(self) -> str:
        return sys.stdin.read()


class FileReader(AbstractReader):
    def read(self) -> str:
        return Path(self._path).read_text(encoding='utf-8', errors='strict')