ai-on-wechat/bot/xunfei/xunfei_spark_bot.py

# encoding:utf-8

import requests, json
from bot.bot import Bot
from bot.session_manager import SessionManager
from bot.baidu.baidu_wenxin_session import BaiduWenxinSession
from bridge.context import ContextType, Context
from bridge.reply import Reply, ReplyType
from common.log import logger
from config import conf
from common import const
import time
import _thread as thread
import datetime
from datetime import datetime
from wsgiref.handlers import format_date_time
from urllib.parse import urlencode
import base64
import ssl
import hashlib
import hmac
import json
from time import mktime
from urllib.parse import urlparse
import websocket
import queue
import threading
import random

# 消息队列 map
queue_map = dict()


class XunFeiBot(Bot):
    def __init__(self):
        super().__init__()
        self.app_id = conf().get("xunfei_app_id")
        self.api_key = conf().get("xunfei_api_key")
        self.api_secret = conf().get("xunfei_api_secret")
        # 默认使用v2.0版本，1.5版本可设置为 general
        self.domain = "generalv2"
        # 默认使用v2.0版本，1.5版本可设置为 "ws://spark-api.xf-yun.com/v1.1/chat"
        self.spark_url = "ws://spark-api.xf-yun.com/v2.1/chat"
        self.host = urlparse(self.spark_url).netloc
        self.path = urlparse(self.spark_url).path
        self.answer = ""
        # 和wenxin使用相同的session机制
        self.sessions = SessionManager(BaiduWenxinSession, model=const.XUNFEI)

    def reply(self, query, context: Context = None) -> Reply:
        if context.type == ContextType.TEXT:
            logger.info("[XunFei] query={}".format(query))
            session_id = context["session_id"]
            request_id = self.gen_request_id(session_id)
            session = self.sessions.session_query(query, session_id)
            threading.Thread(target=self.create_web_socket, args=(session.messages, request_id)).start()
            depth = 0
            time.sleep(0.1)
            t1 = time.time()
            usage = {}
            while depth <= 300:
                try:
                    data_queue = queue_map.get(request_id)
                    if not data_queue:
                        depth += 1
                        time.sleep(0.1)
                        continue
                    data_item = data_queue.get(block=True, timeout=0.1)
                    if data_item.is_end:
                        # 请求结束
                        del queue_map[request_id]
                        if data_item.reply:
                            self.answer += data_item.reply
                        usage = data_item.usage
                        break

                    self.answer += data_item.reply
                    depth += 1
                except Exception as e:
                    depth += 1
                    continue
            t2 = time.time()
            logger.info(f"[XunFei-API] response={self.answer}, time={t2 - t1}s, usage={usage}")
            self.sessions.session_reply(self.answer, session_id, usage.get("total_tokens"))
            reply = Reply(ReplyType.TEXT, self.answer)
            return reply
        else:
            reply = Reply(ReplyType.ERROR, "Bot不支持处理{}类型的消息".format(context.type))
            return reply

    def create_web_socket(self, prompt, session_id, temperature=0.5):
        logger.info(f"[XunFei] start connect, prompt={prompt}")
        websocket.enableTrace(False)
        wsUrl = self.create_url()
        ws = websocket.WebSocketApp(wsUrl, on_message=on_message, on_error=on_error, on_close=on_close,
                                    on_open=on_open)
        data_queue = queue.Queue(1000)
        queue_map[session_id] = data_queue
        ws.appid = self.app_id
        ws.question = prompt
        ws.domain = self.domain
        ws.session_id = session_id
        ws.temperature = temperature
        ws.run_forever(sslopt={"cert_reqs": ssl.CERT_NONE})

    def gen_request_id(self, session_id: str):
        return session_id + "_" + str(int(time.time())) + "" + str(random.randint(0, 100))

    # 生成url
    def create_url(self):
        # 生成RFC1123格式的时间戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))

        # 拼接字符串
        signature_origin = "host: " + self.host + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + self.path + " HTTP/1.1"

        # 进行hmac-sha256进行加密
        signature_sha = hmac.new(self.api_secret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()

        signature_sha_base64 = base64.b64encode(signature_sha).decode(encoding='utf-8')

        authorization_origin = f'api_key="{self.api_key}", algorithm="hmac-sha256", headers="host date request-line", ' \
                               f'signature="{signature_sha_base64}"'

        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')

        # 将请求的鉴权参数组合为字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": self.host
        }
        # 拼接鉴权参数，生成url
        url = self.spark_url + '?' + urlencode(v)
        # 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
        return url

    def gen_params(self, appid, domain, question):
        """
        通过appid和用户的提问来生成请参数
        """
        data = {
            "header": {
                "app_id": appid,
                "uid": "1234"
            },
            "parameter": {
                "chat": {
                    "domain": domain,
                    "random_threshold": 0.5,
                    "max_tokens": 2048,
                    "auditing": "default"
                }
            },
            "payload": {
                "message": {
                    "text": question
                }
            }
        }
        return data


class ReplyItem:
    def __init__(self, reply, usage=None, is_end=False):
        self.is_end = is_end
        self.reply = reply
        self.usage = usage


# 收到websocket错误的处理
def on_error(ws, error):
    logger.error("[XunFei] error:", error)


# 收到websocket关闭的处理
def on_close(ws, one, two):
    data_queue = queue_map.get(ws.session_id)
    data_queue.put("END")


# 收到websocket连接建立的处理
def on_open(ws):
    logger.info(f"[XunFei] Start websocket, session_id={ws.session_id}")
    thread.start_new_thread(run, (ws,))


def run(ws, *args):
    data = json.dumps(gen_params(appid=ws.appid, domain=ws.domain, question=ws.question, temperature=ws.temperature))
    ws.send(data)


# Websocket 操作
# 收到websocket消息的处理
def on_message(ws, message):
    data = json.loads(message)
    code = data['header']['code']
    if code != 0:
        logger.error(f'请求错误: {code}, {data}')
        ws.close()
    else:
        choices = data["payload"]["choices"]
        status = choices["status"]
        content = choices["text"][0]["content"]
        data_queue = queue_map.get(ws.session_id)
        if not data_queue:
            logger.error(f"[XunFei] can't find data queue, session_id={ws.session_id}")
            return
        reply_item = ReplyItem(content)
        if status == 2:
            usage = data["payload"].get("usage")
            reply_item = ReplyItem(content, usage)
            reply_item.is_end = True
            ws.close()
        data_queue.put(reply_item)


def gen_params(appid, domain, question, temperature=0.5):
    """
    通过appid和用户的提问来生成请参数
    """
    data = {
        "header": {
            "app_id": appid,
            "uid": "1234"
        },
        "parameter": {
            "chat": {
                "domain": domain,
                "temperature": temperature,
                "random_threshold": 0.5,
                "max_tokens": 2048,
                "auditing": "default"
            }
        },
        "payload": {
            "message": {
                "text": question
            }
        }
    }
    return data