Python 飞溅+；Scrapoxy:x-cache-proxyname标头缺失

我正在使用以下基础结构来抓取网站：

Scrapy <--> Splash <--> Scrapoxy <--> web site

我想检测禁令并删除被禁止的代理。根据：

Scrapoxy向响应中添加一个HTTP头

x-cache-proxyname

但是我在

response.headers

中没有看到这个标题。唯一的标题是：

{b'Content-Type': b'text/html; charset=utf-8',
 b'Date': b'Wed, 18 Apr 2018 19:02:21 GMT',
 b'Server': b'TwistedWeb/16.1.1'}

我做错了什么？我应该在Lua脚本中添加一些东西来正确返回头吗

---

更新：实际上，这似乎不是一个问题。即使通过HTTPie使用，Scrapoxy也不会返回

x-cache-proxyname

http -v --proxy=https:http://<user>:<password>@<scrapoxy-server>:8888 https://<site>

GET / HTTP/1.1
User-Agent: HTTPie/0.9.9
Accept-Encoding: gzip, deflate
Accept: */*
Connection: keep-alive
Host: <site>


HTTP/1.1 200 OK
Server: nginx
Date: Thu, 28 Jun 2018 08:14:26 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Set-Cookie: <...>
X-Powered-By: Express
ETag: W/"5a31b-faPJ7bjKH24S/3EvHU/8IoJHyxw"
Vary: Cookie, User-Agent
Content-Security-Policy: default-src https:; child-src https:; connect-src https: wss:; form-action https:; frame-ancestors https: http://webvisor.com; media-src https:; object-src https:; img-src https: data: blob:; script-src https: data: 'unsafe-inline' 'unsafe-eval'; style-src https: 'unsafe-inline'; font-src https: data:; report-uri /ajax/csp-report/
Content-Encoding: gzip

http-v--proxy=https:http://:@:8888 https://
GET/HTTP/1.1
用户代理：HTTPie/0.9.9
接受编码：gzip，deflate
接受：*/*
连接：保持活力
主持人:
HTTP/1.1200ok
服务器：nginx
日期：2018年6月28日星期四08:14:26 GMT
内容类型：text/html；字符集=utf-8
传输编码：分块
连接：保持活力
改变：接受编码
设置Cookie：
X-Powered-By:Express
ETag:W/“5a31b-faPJ7bjKH24S/3EvHU/8IoJHyxw”
变化：Cookie、用户代理
内容安全策略：默认src https:；子src https:；连接src https:wss:；表格行动https:；框架：https:http://webvisor.com; 媒体src https:；对象src https:；img src https:data:blob:；脚本src https:data:'unsafe inline''unsafe eval'；样式src https:“不安全内联”；字体src https:数据：；报告uri/ajax/csp报告/
内容编码：gzip

我用这个lua脚本设法获得了x-cache-proxyname

function main(splash)
 local host = "..."
 local port = "..."
 local username = "..."
 local password = "..."
 local proxy = ""
 splash:on_request(function (request)
    request:set_proxy{host, port, username=username, password=password}
 end) 
 splash:on_response_headers(function(response)
    proxy = response.headers["x-cache-proxyname"]
 end)
 splash.images_enabled = false
 splash:go(splash.args.url)
 splash:set_result_header("x-cache-proxyname", proxy)
 splash:go(splash.args.url)
 return splash:html() 
end

更新： 使用HTTPs时，scrapoxy无法编辑标题并将x-cache-proxyname添加到响应中

function main(splash)
 local host = "..."
 local port = "..."
 local username = "..."
 local password = "..."
 local proxy = ""
 splash:on_request(function (request)
    request:set_proxy{host, port, username=username, password=password}
 end) 
 splash:on_response_headers(function(response)
    proxy = response.headers["x-cache-proxyname"]
 end)
 splash.images_enabled = false
 splash:go(splash.args.url)
 splash:set_result_header("x-cache-proxyname", proxy)
 splash:go(splash.args.url)
 return splash:html() 
end