ai-on-wechat/channel/wechatmp/wechatmp_channel.py

# -*- coding: utf-8 -*-
import io
import os
import time
import imghdr
import requests
from bridge.context import *
from bridge.reply import *
from channel.chat_channel import ChatChannel
from channel.wechatmp.wechatmp_client import WechatMPClient
from channel.wechatmp.common import *
from common.log import logger
from common.singleton import singleton
from config import conf

import asyncio
from threading import Thread

import web
# If using SSL, uncomment the following lines, and modify the certificate path.
# from cheroot.server import HTTPServer
# from cheroot.ssl.builtin import BuiltinSSLAdapter
# HTTPServer.ssl_adapter = BuiltinSSLAdapter(
#         certificate='/ssl/cert.pem',
#         private_key='/ssl/cert.key')


@singleton
class WechatMPChannel(ChatChannel):
    def __init__(self, passive_reply=True):
        super().__init__()
        self.passive_reply = passive_reply
        self.NOT_SUPPORT_REPLYTYPE = []
        self.client = WechatMPClient()
        if self.passive_reply:
            # Cache the reply to the user's first message
            self.cache_dict = dict()
            # Record whether the current message is being processed
            self.running = set()
            # Count the request from wechat official server by message_id
            self.request_cnt = dict()
            # The permanent media need to be deleted to avoid media number limit
            self.delete_media_loop = asyncio.new_event_loop()
            t = Thread(target=self.start_loop, args=(self.delete_media_loop,))
            t.setDaemon(True)
            t.start()


    def startup(self):
        if self.passive_reply:
            urls = ("/wx", "channel.wechatmp.passive_reply.Query")
        else:
            urls = ("/wx", "channel.wechatmp.active_reply.Query")
        app = web.application(urls, globals(), autoreload=False)
        port = conf().get("wechatmp_port", 8080)
        web.httpserver.runsimple(app.wsgifunc(), ("0.0.0.0", port))

    def start_loop(self, loop):
        asyncio.set_event_loop(loop)
        loop.run_forever()

    async def delete_media(self, media_id):
        logger.debug("[wechatmp] permanent media {} will be deleted in 10s".format(media_id))
        await asyncio.sleep(10)
        self.client.delete_permanent_media(media_id)
        logger.info("[wechatmp] permanent media {} has been deleted".format(media_id))

    def send(self, reply: Reply, context: Context):
        receiver = context["receiver"]
        if self.passive_reply:
            if reply.type == ReplyType.TEXT or reply.type == ReplyType.INFO or reply.type == ReplyType.ERROR:
                reply_text = reply.content
                logger.info("[wechatmp] text cached, receiver {}\n{}".format(receiver, reply_text))
                self.cache_dict[receiver] = ("text", reply_text)
            elif reply.type == ReplyType.VOICE:
                voice_file_path = reply.content
                logger.debug("[wechatmp] voice file path {}".format(voice_file_path))
                with open(voice_file_path, 'rb') as f:
                    filename = receiver + "-" + context["msg"].msg_id + ".mp3"
                    media_id = self.client.upload_permanent_media("voice", (filename, f, "audio/mpeg"))
                    # 根据文件大小估计一个微信自动审核的时间，审核结束前返回将会导致语音无法播放，这个估计有待验证
                    f_size = os.fstat(f.fileno()).st_size
                    time.sleep(1.0 + 2 * f_size / 1024 / 1024)
                    logger.info("[wechatmp] voice uploaded, receiver {}, media_id {}".format(receiver, media_id))
                    self.cache_dict[receiver] = ("voice", media_id)
            elif reply.type == ReplyType.IMAGE_URL:  # 从网络下载图片
                img_url = reply.content
                pic_res = requests.get(img_url, stream=True)
                image_storage = io.BytesIO()
                for block in pic_res.iter_content(1024):
                    image_storage.write(block)
                image_storage.seek(0)
                image_type = imghdr.what(image_storage)
                filename = receiver + "-" + context["msg"].msg_id + "." + image_type
                content_type = "image/" + image_type
                media_id = self.client.upload_permanent_media("image", (filename, image_storage, content_type))
                logger.info("[wechatmp] image uploaded, receiver {}, media_id {}".format(receiver, media_id))
                self.cache_dict[receiver] = ("image", media_id)
            elif reply.type == ReplyType.IMAGE:  # 从文件读取图片
                image_storage = reply.content
                image_storage.seek(0)
                image_type = imghdr.what(image_storage)
                filename = receiver + "-" + context["msg"].msg_id + "." + image_type
                content_type = "image/" + image_type
                media_id = self.client.upload_permanent_media("image", (filename, image_storage, content_type))
                logger.info("[wechatmp] image uploaded, receiver {}, media_id {}".format(receiver, media_id))
                self.cache_dict[receiver] = ("image", media_id)
        else:
            if reply.type == ReplyType.TEXT or reply.type == ReplyType.INFO or reply.type == ReplyType.ERROR:
                reply_text = reply.content
                self.client.send_text(receiver, reply_text)
                logger.info("[wechatmp] Do send text to {}: {}".format(receiver, reply_text))
            elif reply.type == ReplyType.VOICE:
                voice_file_path = reply.content
                logger.debug("[wechatmp] voice file path {}".format(voice_file_path))
                with open(voice_file_path, 'rb') as f:
                    filename = receiver + "-" + context["msg"].msg_id + ".mp3"
                    media_id = self.client.upload_media("voice", (filename, f, "audio/mpeg"))
                    self.client.send_voice(receiver, media_id)
                    logger.info("[wechatmp] Do send voice to {}".format(receiver))
            elif reply.type == ReplyType.IMAGE_URL:  # 从网络下载图片
                img_url = reply.content
                pic_res = requests.get(img_url, stream=True)
                image_storage = io.BytesIO()
                for block in pic_res.iter_content(1024):
                    image_storage.write(block)
                image_storage.seek(0)
                image_type = imghdr.what(image_storage)
                filename = receiver + "-" + context["msg"].msg_id + "." + image_type
                content_type = "image/" + image_type
                # content_type = pic_res.headers.get('content-type')
                media_id = self.client.upload_media("image", (filename, image_storage, content_type))
                self.client.send_image(receiver, media_id)
                logger.info("[wechatmp] Do send image to {}".format(receiver))
            elif reply.type == ReplyType.IMAGE:  # 从文件读取图片
                image_storage = reply.content
                image_storage.seek(0)
                image_type = imghdr.what(image_storage)
                filename = receiver + "-" + context["msg"].msg_id + "." + image_type
                content_type = "image/" + image_type
                media_id = self.client.upload_media("image", (filename, image_storage, content_type))
                self.client.send_image(receiver, media_id)
                logger.info("[wechatmp] Do send image to {}".format(receiver))
        return

    def _success_callback(self, session_id, context, **kwargs):  # 线程异常结束时的回调函数
        logger.debug(
            "[wechatmp] Success to generate reply, msgId={}".format(
                context["msg"].msg_id
            )
        )
        if self.passive_reply:
            self.running.remove(session_id)

    def _fail_callback(self, session_id, exception, context, **kwargs):  # 线程异常结束时的回调函数
        logger.exception(
            "[wechatmp] Fail to generate reply to user, msgId={}, exception={}".format(
                context["msg"].msg_id, exception
            )
        )
        if self.passive_reply:
            assert session_id not in self.cache_dict
            self.running.remove(session_id)