set                   $_level     '';
set                   $_switched  '';
set                   $_url       '';
set                   $_ver       '';
set                   $_ref       '';
set                   $_type      '';
set                   $_mode      '';
set                   $_bodyhash  '';

error_page            500 502 504 /error;

location = /error {
  internal;
  access_log          off;
  more_set_headers
    'access-control-allow-origin: *'
    'access-control-expose-headers: gateway-err--'
    'gateway-err--: {"msg": "$arg_msg", "addr": "$upstream_addr", "url": "$arg_url"}'
  ;
  return              204;
}


location = /preflight {
  internal;
  access_log          off;
  more_set_headers
    'access-control-allow-origin: *'
    'access-control-allow-methods: GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS'
    'access-control-max-age: 1728000'
  ;
  return              204;
}

# 该接口已作废
location = /http {
  access_log          off;
  more_set_headers    'access-control-allow-origin: *';
  return              200  "该接口已作废，请更新前端脚本";
}

# HTTP(S) Proxy
location /http/ {
  # see ./allowed-sites.conf
  if ($_origin_id = '') {
    rewrite             ^   /error?msg=ORIGIN_NOT_ALLOWED;
  }
  if ($http_x_jsproxy) {
    rewrite             ^   /error?msg=CIRCULAR_DEPENDENCY;
  }
  proxy_set_header      x-jsproxy   1;
  proxy_set_header      Connection  $http_connection;
  

  if ($http_access_control_request_methods) {
    rewrite             ^   /preflight;
  }

  access_by_lua_file    ../lua/http-dec-req-hdr.lua;

  proxy_cache           my_cache;
  proxy_pass            $_url;

  more_set_headers
    'server: $upstream_http_server'
    'content-security-policy'
    'content-security-policy-report-only'
    'x-frame-options'
    'alt-svc'
    'clear-site-data'
  ;
  header_filter_by_lua_file   ../lua/http-enc-res-hdr.lua;
  body_filter_by_lua_file     ../lua/http-body-hash.lua;
}


# WebSocket Proxy
location = /ws {
  access_by_lua_file    ../lua/ws-dec-req-hdr.lua;
  proxy_set_header      Upgrade     $http_upgrade;
  proxy_set_header      Connection  $http_connection;
  proxy_pass            $_url;
}