158 lines
5.5 KiB
Python
158 lines
5.5 KiB
Python
"""代理业务服务"""
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import csv
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import json
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import io
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from datetime import datetime
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from typing import List, Optional, Tuple, AsyncIterator
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from app.core.db import get_db
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from app.repositories.proxy_repo import ProxyRepository
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from app.repositories.settings_repo import SettingsRepository
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from app.models.domain import Proxy
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from app.core.log import logger
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from app.core.config import settings as app_settings
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from app.services.proxy_scoring import compute_proxy_quality_score
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class ProxyService:
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def __init__(self, proxy_repo: ProxyRepository = ProxyRepository()):
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self.proxy_repo = proxy_repo
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async def get_stats(self) -> dict:
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async with get_db() as db:
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s = await SettingsRepository.get_all(db)
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floor = int(s.get("min_proxy_score", 0))
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stats = await self.proxy_repo.get_stats(db, low_score_threshold=floor)
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stats["today_new"] = await self.proxy_repo.get_today_new_count(db)
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return stats
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async def list_proxies(
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self,
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page: int = 1,
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page_size: int = 20,
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protocol: Optional[str] = None,
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min_score: int = 0,
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max_score: Optional[int] = None,
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sort_by: str = "last_check",
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sort_order: str = "DESC",
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pool_filter: Optional[str] = None,
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) -> Tuple[List[Proxy], int]:
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async with get_db() as db:
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return await self.proxy_repo.list_paginated(
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db,
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page,
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page_size,
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protocol,
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min_score,
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max_score,
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sort_by,
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sort_order,
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pool_filter=pool_filter,
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)
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async def get_random_proxy(self) -> Optional[Proxy]:
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async with get_db() as db:
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s = await SettingsRepository.get_all(db)
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floor = int(s.get("min_proxy_score", 0))
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ms = max(1, floor)
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p = await self.proxy_repo.get_random(db, min_score=ms)
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if not p:
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return None
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new_uc = int(getattr(p, "use_count", 0) or 0) + 1
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q_score = compute_proxy_quality_score(
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p.response_time_ms, new_uc, app_settings
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)
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await self.proxy_repo.set_use_count_and_score(
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db, p.ip, p.port, new_uc, q_score
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)
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p.use_count = new_uc
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p.score = q_score
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return p
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async def delete_proxy(self, ip: str, port: int) -> None:
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async with get_db() as db:
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await self.proxy_repo.delete(db, ip, port)
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async def batch_delete(self, proxies: List[Tuple[str, int]]) -> int:
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async with get_db() as db:
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return await self.proxy_repo.batch_delete(db, proxies)
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async def clean_invalid(self) -> int:
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async with get_db() as db:
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s = await SettingsRepository.get_all(db)
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floor = int(s.get("min_proxy_score", 0))
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return await self.proxy_repo.clean_invalid(db, low_score_threshold=floor)
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async def clean_expired(self, days: int) -> int:
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async with get_db() as db:
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return await self.proxy_repo.clean_expired(db, days)
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async def export_proxies(
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self,
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fmt: str,
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protocol: Optional[str] = None,
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limit: Optional[int] = None,
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) -> AsyncIterator[str]:
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cap = int(app_settings.export_max_records) if limit is None else int(limit)
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if cap < 1:
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cap = 1
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if fmt == "csv":
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yield "\ufeffIP,Port,Protocol,Score,Last Check\n"
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elif fmt == "txt":
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pass
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elif fmt == "json":
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yield "["
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first = True
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exported = 0
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async with get_db() as db:
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s = await SettingsRepository.get_all(db)
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floor = max(1, int(s.get("min_proxy_score", 0)))
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async for batch in self.proxy_repo.iter_batches(
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db,
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protocol=protocol,
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batch_size=1000,
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only_usable=True,
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usable_min_score=floor,
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):
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for p in batch:
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if exported >= cap:
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break
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if fmt == "csv":
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yield f"{p.ip},{p.port},{p.protocol},{p.score},{self._fmt_time(p.last_check)}\n"
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elif fmt == "txt":
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yield f"{p.ip}:{p.port}\n"
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elif fmt == "json":
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item = {
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"ip": p.ip,
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"port": p.port,
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"protocol": p.protocol,
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"score": p.score,
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"last_check": self._fmt_time(p.last_check),
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}
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prefix = "" if first else ","
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yield prefix + json.dumps(item, ensure_ascii=False)
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first = False
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exported += 1
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if exported >= cap:
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break
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if fmt == "json":
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yield "]"
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@staticmethod
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def _fmt_time(dt: Optional[datetime]) -> str:
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if not dt:
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return ""
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if isinstance(dt, str):
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return dt
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return dt.isoformat()
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async def get_latency_distribution(self) -> dict:
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async with get_db() as db:
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return await self.proxy_repo.get_latency_distribution(db)
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async def get_score_distribution(self) -> dict:
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async with get_db() as db:
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return await self.proxy_repo.get_score_distribution(db)
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