mirror of
https://github.com/xinnan-tech/xiaozhi-esp32-server.git
synced 2026-07-21 22:53:56 +08:00
237 lines
8.3 KiB
Python
237 lines
8.3 KiB
Python
import http.client
|
|
import json
|
|
import asyncio
|
|
from typing import Optional, Tuple, List
|
|
import os
|
|
import uuid
|
|
import hmac
|
|
import hashlib
|
|
import base64
|
|
import requests
|
|
from urllib import parse
|
|
import time
|
|
from datetime import datetime
|
|
from config.logger import setup_logging
|
|
from core.providers.asr.base import ASRProviderBase
|
|
from core.providers.asr.dto.dto import InterfaceType
|
|
|
|
TAG = __name__
|
|
logger = setup_logging()
|
|
|
|
|
|
class AccessToken:
|
|
@staticmethod
|
|
def _encode_text(text):
|
|
encoded_text = parse.quote_plus(text)
|
|
return encoded_text.replace("+", "%20").replace("*", "%2A").replace("%7E", "~")
|
|
|
|
@staticmethod
|
|
def _encode_dict(dic):
|
|
keys = dic.keys()
|
|
dic_sorted = [(key, dic[key]) for key in sorted(keys)]
|
|
encoded_text = parse.urlencode(dic_sorted)
|
|
return encoded_text.replace("+", "%20").replace("*", "%2A").replace("%7E", "~")
|
|
|
|
@staticmethod
|
|
def create_token(access_key_id, access_key_secret):
|
|
parameters = {
|
|
"AccessKeyId": access_key_id,
|
|
"Action": "CreateToken",
|
|
"Format": "JSON",
|
|
"RegionId": "cn-shanghai",
|
|
"SignatureMethod": "HMAC-SHA1",
|
|
"SignatureNonce": str(uuid.uuid1()),
|
|
"SignatureVersion": "1.0",
|
|
"Timestamp": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime()),
|
|
"Version": "2019-02-28",
|
|
}
|
|
# 构造规范化的请求字符串
|
|
query_string = AccessToken._encode_dict(parameters)
|
|
# print('规范化的请求字符串: %s' % query_string)
|
|
# 构造待签名字符串
|
|
string_to_sign = (
|
|
"GET"
|
|
+ "&"
|
|
+ AccessToken._encode_text("/")
|
|
+ "&"
|
|
+ AccessToken._encode_text(query_string)
|
|
)
|
|
# print('待签名的字符串: %s' % string_to_sign)
|
|
# 计算签名
|
|
secreted_string = hmac.new(
|
|
bytes(access_key_secret + "&", encoding="utf-8"),
|
|
bytes(string_to_sign, encoding="utf-8"),
|
|
hashlib.sha1,
|
|
).digest()
|
|
signature = base64.b64encode(secreted_string)
|
|
# print('签名: %s' % signature)
|
|
# 进行URL编码
|
|
signature = AccessToken._encode_text(signature)
|
|
# print('URL编码后的签名: %s' % signature)
|
|
# 调用服务
|
|
full_url = "http://nls-meta.cn-shanghai.aliyuncs.com/?Signature=%s&%s" % (
|
|
signature,
|
|
query_string,
|
|
)
|
|
# print('url: %s' % full_url)
|
|
# 提交HTTP GET请求
|
|
response = requests.get(full_url)
|
|
if response.ok:
|
|
root_obj = response.json()
|
|
key = "Token"
|
|
if key in root_obj:
|
|
token = root_obj[key]["Id"]
|
|
expire_time = root_obj[key]["ExpireTime"]
|
|
return token, expire_time
|
|
# print(response.text)
|
|
return None, None
|
|
|
|
|
|
class ASRProvider(ASRProviderBase):
|
|
def __init__(self, config: dict, delete_audio_file: bool):
|
|
super().__init__()
|
|
self.interface_type = InterfaceType.NON_STREAM
|
|
"""阿里云ASR初始化"""
|
|
# 新增空值判断逻辑
|
|
self.access_key_id = config.get("access_key_id")
|
|
self.access_key_secret = config.get("access_key_secret")
|
|
|
|
self.app_key = config.get("appkey")
|
|
self.host = "nls-gateway-cn-shanghai.aliyuncs.com"
|
|
self.base_url = f"https://{self.host}/stream/v1/asr"
|
|
self.sample_rate = 16000
|
|
self.format = "wav"
|
|
self.output_dir = config.get("output_dir", "./audio_output")
|
|
self.delete_audio_file = delete_audio_file
|
|
|
|
if self.access_key_id and self.access_key_secret:
|
|
# 使用密钥对生成临时token
|
|
self._refresh_token()
|
|
else:
|
|
# 直接使用预生成的长期token
|
|
self.token = config.get("token")
|
|
self.expire_time = None
|
|
|
|
# 确保输出目录存在
|
|
os.makedirs(self.output_dir, exist_ok=True)
|
|
|
|
def _refresh_token(self):
|
|
"""刷新Token并记录过期时间"""
|
|
if self.access_key_id and self.access_key_secret:
|
|
self.token, expire_time_str = AccessToken.create_token(
|
|
self.access_key_id, self.access_key_secret
|
|
)
|
|
if not expire_time_str:
|
|
raise ValueError("无法获取有效的Token过期时间")
|
|
|
|
try:
|
|
# 统一转换为字符串处理
|
|
expire_str = str(expire_time_str).strip()
|
|
|
|
if expire_str.isdigit():
|
|
expire_time = datetime.fromtimestamp(int(expire_str))
|
|
else:
|
|
expire_time = datetime.strptime(expire_str, "%Y-%m-%dT%H:%M:%SZ")
|
|
self.expire_time = expire_time.timestamp() - 60
|
|
except Exception as e:
|
|
raise ValueError(f"无效的过期时间格式: {expire_str}") from e
|
|
|
|
else:
|
|
self.expire_time = None
|
|
|
|
if not self.token:
|
|
raise ValueError("无法获取有效的访问Token")
|
|
|
|
def _is_token_expired(self):
|
|
"""检查Token是否过期"""
|
|
if not self.expire_time:
|
|
return False # 长期Token不过期
|
|
# 新增调试日志
|
|
# current_time = time.time()
|
|
# remaining = self.expire_time - current_time
|
|
# print(f"Token过期检查: 当前时间 {datetime.fromtimestamp(current_time)} | "
|
|
# f"过期时间 {datetime.fromtimestamp(self.expire_time)} | "
|
|
# f"剩余 {remaining:.2f}秒")
|
|
return time.time() > self.expire_time
|
|
|
|
def _construct_request_url(self) -> str:
|
|
"""构造请求URL，包含参数"""
|
|
request = f"{self.base_url}?appkey={self.app_key}"
|
|
request += f"&format={self.format}"
|
|
request += f"&sample_rate={self.sample_rate}"
|
|
request += "&enable_punctuation_prediction=true"
|
|
request += "&enable_inverse_text_normalization=true"
|
|
request += "&enable_voice_detection=false"
|
|
return request
|
|
|
|
async def _send_request(self, pcm_data: bytes) -> Optional[str]:
|
|
"""发送请求到阿里云ASR服务"""
|
|
try:
|
|
# 设置HTTP头
|
|
headers = {
|
|
"X-NLS-Token": self.token,
|
|
"Content-type": "application/octet-stream",
|
|
"Content-Length": str(len(pcm_data)),
|
|
}
|
|
|
|
# 创建连接并发送请求
|
|
conn = http.client.HTTPSConnection(self.host)
|
|
request_url = self._construct_request_url()
|
|
|
|
loop = asyncio.get_event_loop()
|
|
await loop.run_in_executor(
|
|
None,
|
|
lambda: conn.request(
|
|
method="POST", url=request_url, body=pcm_data, headers=headers
|
|
),
|
|
)
|
|
|
|
# 获取响应
|
|
response = await loop.run_in_executor(None, conn.getresponse)
|
|
body = await loop.run_in_executor(None, response.read)
|
|
conn.close()
|
|
|
|
# 解析响应
|
|
try:
|
|
body_json = json.loads(body)
|
|
status = body_json.get("status")
|
|
|
|
if status == 20000000:
|
|
result = body_json.get("result", "")
|
|
logger.bind(tag=TAG).debug(f"ASR结果: {result}")
|
|
return result
|
|
else:
|
|
logger.bind(tag=TAG).error(f"ASR失败，状态码: {status}")
|
|
return None
|
|
|
|
except ValueError:
|
|
logger.bind(tag=TAG).error("响应不是JSON格式")
|
|
return None
|
|
|
|
except Exception as e:
|
|
logger.bind(tag=TAG).error(f"ASR请求失败: {e}", exc_info=True)
|
|
return None
|
|
|
|
async def speech_to_text(
|
|
self, opus_data: List[bytes], session_id: str, artifacts=None
|
|
) -> Tuple[Optional[str], Optional[str]]:
|
|
"""将语音数据转换为文本"""
|
|
if self._is_token_expired():
|
|
logger.warning("Token已过期，正在自动刷新...")
|
|
self._refresh_token()
|
|
|
|
try:
|
|
if artifacts is None:
|
|
return "", None
|
|
# 发送请求并获取文本
|
|
text = await self._send_request(artifacts.pcm_bytes)
|
|
|
|
if text:
|
|
return text, artifacts.file_path
|
|
|
|
return "", artifacts.file_path
|
|
|
|
except Exception as e:
|
|
logger.bind(tag=TAG).error(f"语音识别失败: {e}", exc_info=True)
|
|
return "", None
|