Scrapy IP agent is not responding

Scrapy ip Analysis of the reason why the agent has not responded for a long time

stay setting.py Add available in ip Agent pool ：

PROXIES=[
    'http://182.149.82.74:9999',
    'http://121.237.25.238:3000',
    'http://61.183.176.122:57210',
    'http://175.43.84.29:9999',
]

In middleware middlewares.py Add the following classes ：

import scrapy
from scrapy import signals
import random

class ProxyMiddleware(object):

    def __init__(self, ip):
        self.ip = ip

    @classmethod
    def from_crawler(cls, crawler):
        return cls(ip=crawler.settings.get('PROXIES'))

    def process_request(self, request, spider):
        ip = random.choice(self.ip)
        request.meta['http_proxy'] = ip
        print(" At present ip by ："+ip)

stay setting.py Of documents DOWNLOADER_MIDDLEWARES Add middleware to attributes ：

DOWNLOADER_MIDDLEWARES = {
    
    'scrapy.downloadermiddleware.useragent.UserAgentMiddleware': None, 
    'myproject.middlewares.MyUserAgentMiddleware': 400,
}

At the beginning, I added agents to the middleware IP Part of the code is ：

request.meta['proxy'] = ip

my python Version is 3.7,Scrapy by 1.6.0, Maybe due to version problems , Setting the proxy has been unsuccessful , Change it to ：

request.meta['http_proxy'] = ip

after , The problem of unsuccessful agency was successfully solved ！！！