#禁止Scrapy等工具的抓取
if ($http_user_agent ~* (Scrapy|Curl|HttpClient)) {
     return 403;
}
#禁止指定UA及UA為空的訪問
if ($http_user_agent ~ "opensiteexplorer|MauiBot|FeedDemon|SemrushBot|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|CoolpadWebkit|Java|semrushbot|alphaseobot|semrush|Feedly|UniversalFeedParser|webmeup-crawler|ApacheBench|Microsoft URL Control|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|lightDeckReports Bot|YYSpider|DigExt|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|^$" ) {
     return 403;             
}
#禁止非GET|HEAD|POST方式的抓取
if ($request_method !~ ^(GET|HEAD|POST)$) {
    return 403;
}