Syntax: proxy_buffer_size size; Default: proxy_buffer_size 4k|8k;

Syntax: sub_filter_once on | off; Default: sub_filter_once

Syntax: fastcgi_param parameter value [if_not_empty];

Syntax: fastcgi_max_temp_file_size size; Default: fastcgi_max_temp_file_size

Syntax: uwsgi_temp_file_write_size size; Default: uwsgi_temp_file_write_size

Syntax: proxy_next_upstream error | timeout | invalid_header | http_500

Syntax: client_body_in_file_only on | clean | off;

Syntax: charset charset | off; Default: charset off;

Syntax: keepalive_timeout timeout [header_timeout]; Default:

Syntax: proxy_next_upstream_timeout time; Default: proxy_next_upstream_timeout