利用nginx反爬虫-UA反爬

if ($http_user_agent ~* (Scrapy|Curl|HttpClient)) {
    return 403;
  }
 
  # UA
  if ($http_user_agent ~ "Bytespider|FeedDemon|JikeSpider|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|CoolpadWebkit|Java|Feedly|UniversalFeedParser|ApacheBench|Microsoft URL Control|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|python-requests|lightDeckReports Bot|YYSpider|DigExt|YisouSpider|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|^$" ) {
 
    return 403;
  }
  #get|head|post method access
  if ($request_method !~ ^(GET|HEAD|POST)$) {
    return 403;
  }