scrapy的request的meta参数是什么意思
答案:1 悬赏:20 手机版
解决时间 2021-02-14 16:28
- 提问者网友：謫仙
- 2021-02-13 20:28
scrapy的request的meta参数是什么意思
最佳答案
- 五星知识达人网友：底特律间谍
- 2021-02-13 21:50
1、在Scrapy工程下新建"middlewares.py":
import base64
# Start your middleware class
class ProxyMiddleware(object):
# overwrite process request
def process_request(self, request, spider):
# Set the location of the proxy
request.meta['proxy'] = ""
# Use the following lines if your proxy requires authentication
proxy_user_pass = "USERNAME:PASSWORD"
# setup basic authentication for the proxy
encoded_user_pass = base64.encodestring(proxy_user_pass)
request.headers['Proxy-Authorization'] = 'Basic ' + encoded_user_pass
2、在项目配置文件里setting.py添加:
DOWNLOADER_MIDDLEWARES = {
'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
'pythontab.middlewares.ProxyMiddleware': 100,
}
import base64
# Start your middleware class
class ProxyMiddleware(object):
# overwrite process request
def process_request(self, request, spider):
# Set the location of the proxy
request.meta['proxy'] = ""
# Use the following lines if your proxy requires authentication
proxy_user_pass = "USERNAME:PASSWORD"
# setup basic authentication for the proxy
encoded_user_pass = base64.encodestring(proxy_user_pass)
request.headers['Proxy-Authorization'] = 'Basic ' + encoded_user_pass
2、在项目配置文件里setting.py添加:
DOWNLOADER_MIDDLEWARES = {
'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
'pythontab.middlewares.ProxyMiddleware': 100,
}
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