试验了几个反向代理，发现都面临一个问题

试验环境

主机： Mac 运行 Valte 跑 phpcms 程序，不加任何反代在本机或在内网内打开 phpcms.dev 进行任何操作都不会有问题的。

内网三台机器，全部最小化安装 ubuntu 14.04 lts ， apt 直接安装各软件

• 内网 A 机器： nginx 反代
• 内网 B 机器： varnish 反代
• 内网 C 机器： squid 反代

配置都是直接拿官方教科书一般的配置文件，添加进去的配置少得可怜，连缓存都不会有的，不影响测试。

nginx 配置：

server { listen 80 default fastopen=256 reuseort; server_name _; access_log /var/log/nginx/proxy-access.log combined; error_log /var/log/nginx/proxy-error.log; resolver 8.8.4.4 8.8.8.8 valid=300s; resolver_timeout 10s; location / { proxy_pass http://172.16.1.168; include proxy.inc; } } 

varnish 配置： https://github.com/mattiasgeniar/varnish-4.0-configuration-templates/blob/master/default.vcl

squid 配置只是在原有默认配置上加了cache_peer上游服务器，访问其他都是没问题，唯独这个 phpcms 的安装步骤。

主要问题是在进行安装的第三步 post 数据时就一定过不去了，在 chrome 抓取到的错误信息如下：

156585: URL_REQUEST http://phpcms.dev/install/install.php? Start Time: 2016-10-28 17:19:10.326 t= 2381 [st= 0] +REQUEST_ALIVE [dt=24547] t= 2381 [st= 0] DELEGATE_INFO [dt=13] --> delegate_info = "NavigationResourceThrottle" t= 2394 [st= 13] +URL_REQUEST_DELEGATE [dt=2] t= 2394 [st= 13] DELEGATE_INFO [dt=2] --> delegate_info = "扩展程序“ uBlock Origin ”" t= 2396 [st= 15] -URL_REQUEST_DELEGATE t= 2396 [st= 15] +URL_REQUEST_START_JOB [dt=24518] --> load_flags = 37122 (BYPASS_CACHE | MAIN_FRAME | MAYBE_USER_GESTURE | VERIFY_EV_CERT) --> method = "POST" --> priority = "HIGHEST" --> upload_id = "1477638942369727" --> url = "http://phpcms.dev/install/install.php?" t= 2396 [st= 15] URL_REQUEST_DELEGATE [dt=0] t= 2396 [st= 15] HTTP_CACHE_GET_BACKEND [dt=0] t= 2396 [st= 15] HTTP_CACHE_DOOM_ENTRY [dt=0] --> net_error = -2 (ERR_FAILED) t= 2396 [st= 15] HTTP_CACHE_CREATE_ENTRY [dt=0] t= 2396 [st= 15] HTTP_CACHE_ADD_TO_ENTRY [dt=0] t= 2397 [st= 16] +HTTP_STREAM_REQUEST [dt=6] t= 2397 [st= 16] HTTP_STREAM_REQUEST_STARTED_JOB --> source_dependency = 156588 (HTTP_STREAM_JOB) t= 2403 [st= 22] HTTP_STREAM_REQUEST_BOUND_TO_JOB --> source_dependency = 156588 (HTTP_STREAM_JOB) t= 2403 [st= 22] -HTTP_STREAM_REQUEST t= 2403 [st= 22] +UPLOAD_DATA_STREAM_INIT [dt=0] t= 2403 [st= 22] UPLOAD_DATA_STREAM_INIT [dt=0] --> is_chunked = false --> net_error = 0 (?) --> total_size = 389 t= 2403 [st= 22] -UPLOAD_DATA_STREAM_INIT --> is_chunked = false --> net_error = 0 (?) --> total_size = 389 t= 2403 [st= 22] +HTTP_TRANSACTION_SEND_REQUEST [dt=1] t= 2403 [st= 22] HTTP_TRANSACTION_SEND_REQUEST_HEADERS --> POST /install/install.php? HTTP/1.1 Host: phpcms.dev Connection: keep-alive Content-Length: 389 Pragma: no-cache Cache-Control: no-cache Origin: http://phpcms.dev Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36 Content-Type: application/x-www-form-urlencoded Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 DNT: 1 Referer: http://phpcms.dev/install/install.php?step=3 Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4,zh-TW;q=0.2,ja;q=0.2 t= 2403 [st= 22] HTTP_TRANSACTION_SEND_REQUEST_BODY --> did_merge = false --> is_chunked = false --> length = 389 t= 2403 [st= 22] +UPLOAD_DATA_STREAM_READ [dt=1] --> current_position = 0 t= 2403 [st= 22] UPLOAD_DATA_STREAM_READ [dt=1] --> current_position = 0 t= 2404 [st= 23] -UPLOAD_DATA_STREAM_READ t= 2404 [st= 23] UPLOAD_DATA_STREAM_READ [dt=0] --> current_position = 389 t= 2404 [st= 23] -HTTP_TRANSACTION_SEND_REQUEST t= 2404 [st= 23] +HTTP_TRANSACTION_READ_HEADERS [dt=24510] t= 2404 [st= 23] HTTP_STREAM_PARSER_READ_HEADERS [dt=24510] --> net_error = -324 (ERR_EMPTY_RESPONSE) t=26914 [st=24533] -HTTP_TRANSACTION_READ_HEADERS --> net_error = -324 (ERR_EMPTY_RESPONSE) t=26914 [st=24533] -URL_REQUEST_START_JOB --> net_error = -324 (ERR_EMPTY_RESPONSE) t=26926 [st=24545] URL_REQUEST_DELEGATE [dt=1] t=26928 [st=24547] -REQUEST_ALIVE --> net_error = -324 (ERR_EMPTY_RESPONSE) 

看到最后的 HTTP_TRANSACTION_READ_HEADERS ，耗时 24510 ，然后网页就返回无响应被重置了。