153 lines
4.6 KiB
Python
153 lines
4.6 KiB
Python
import json
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import random
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from typing import Tuple, Dict
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import httpx
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import redis.asyncio as redis_asyncio
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from fastapi import APIRouter, Depends, HTTPException
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from app.models import User
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from app.schemas.trans_schemas import TransResponse, TransRequest
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from app.utils.md5 import make_md5
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from app.utils.security import is_admin_user, get_current_user
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from settings import settings
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translator_router = APIRouter()
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# For list of language codes, please refer to `https://api.fanyi.baidu.com/doc/21`
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from_lang = 'en'
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to_lang = 'zh'
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# endpoint = 'https://api.fanyi.baidu.com'
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# path = '/api/trans/vip/translate'
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# url = endpoint + path
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#
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# query = 'Hello World! This is 1st paragraph.\nThis is 2nd paragraph.'
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#
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# salt = random.randint(32768, 65536)
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# sign = make_md5(appid + query + str(salt) + appkey)
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#
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# headers = {'Content-Type': 'application/x-www-form-urlencoded'}
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# payload = {'appid': appid, 'q': query, 'from': from_lang, 'to': to_lang, 'salt': salt, 'sign': sign}
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#
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#
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# # Send request
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# r = requests.post(url, params=payload, headers=headers)
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# result = r.json()
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#
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# # Show response
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# print(json.dumps(result, indent=4, ensure_ascii=False))
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async def baidu_translation(query: str, from_lang: str, to_lang: str):
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url = "http://api.fanyi.baidu.com/api/trans/vip/translate"
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appid = settings.BAIDU_APPID
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appkey = settings.BAIDU_APPKEY
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salt = str(random.randint(32768, 65536))
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sign = make_md5(appid + query + salt + appkey)
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payload = {
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"q": query,
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"from": from_lang,
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"to": to_lang,
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"appid": appid,
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"salt": salt,
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"sign": sign,
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}
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# print(payload)
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#
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# request = httpx.Request(
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# "POST",
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# url,
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# data=payload,
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# headers={"Content-Type": "application/x-www-form-urlencoded"}
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# )
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# print("完整请求内容:")
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# print("URL:", request.url)
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# print("Headers:", request.headers)
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# print("Body:", request.content.decode("utf-8"))
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async with httpx.AsyncClient(timeout=10) as client:
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response = await client.post(
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url,
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data=payload,
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headers={'Content-Type': 'application/x-www-form-urlencoded'}
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)
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if response.status_code != 200:
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raise HTTPException(status_code=500, detail=response.json())
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data = response.json()
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print(json.dumps(data, indent=2, ensure_ascii=False))
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if "trans_result" not in data:
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raise HTTPException(status_code=500, detail={"error_code": data.get("error_code"), "error_msg": data.get("error_msg")})
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return "\n".join([item["dst"] for item in data["trans_result"]])
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redis = redis_asyncio.from_url("redis://localhost", encoding="utf-8", decode_responses=True)
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async def rate_limiter(
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user: Tuple[User, Dict] = Depends(get_current_user),
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limit: int = 2,
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window: int = 1
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):
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"""
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限制每个 IP 在 window 秒内最多 limit 次请求
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"""
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client_ip = user[0].id
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key = f"rate limit {client_ip}"
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count = await redis.get(key)
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if count is None:
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# 第一次请求 → 设置计数和过期时间
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await redis.set(key, 1, ex=window)
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elif int(count) < limit:
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await redis.incr(key)
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else:
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raise HTTPException(status_code=429, detail=f"Too many requests")
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@translator_router.post('/translate', response_model=TransResponse, dependencies=[Depends(rate_limiter)])
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async def translate(
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translate_request: TransRequest,
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user: Tuple[User, Dict] = Depends(get_current_user),
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):
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try:
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text = await baidu_translation(
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query=translate_request.query,
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from_lang=translate_request.from_lang,
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to_lang=translate_request.to_lang,
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)
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except HTTPException as e:
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print(e.status_code, e.detail)
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raise HTTPException(status_code=400, detail=e.detail)
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return TransResponse(translated_text=text)
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@translator_router.post('/translate/debug', dependencies=[Depends(rate_limiter)])
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async def test_translate(
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query: str,
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from_lang: str = "auto",
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to_lang: str = 'zh',
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admin_user: Tuple[User, dict] = Depends(is_admin_user)
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):
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"""
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尝试使用多次翻译请求接口，要求在前端监听输入在约300ms左右内保持不输入再传入，
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同时后端检查避免多次恶意访问
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:param query: 待翻译文本
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:param from_lang: 源语言，默认auto，百度API自动检测
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:param to_lang: 目标语言，不允许auto
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:param admin_user: 测试接口，仅管理员权限可用
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:return:
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"""
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raw = await baidu_translation(query, from_lang, to_lang)
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print(raw)
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return TransResponse(translated_text=raw)
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