From c8d5abb39745c4a00a18a3c661283a9a5ba91dd4 Mon Sep 17 00:00:00 2001 From: Ivaylo Novakov Date: Mon, 14 Mar 2022 16:10:48 +0100 Subject: [PATCH] single set_by_lua_block --- docker/nginx/conf.d/include/location-skylink | 120 +------------------ 1 file changed, 3 insertions(+), 117 deletions(-) diff --git a/docker/nginx/conf.d/include/location-skylink b/docker/nginx/conf.d/include/location-skylink index f3fda98b..ccb40e6f 100644 --- a/docker/nginx/conf.d/include/location-skylink +++ b/docker/nginx/conf.d/include/location-skylink @@ -1,122 +1,8 @@ include /etc/nginx/conf.d/include/cors; -include /etc/nginx/conf.d/include/proxy-buffer; -#include /etc/nginx/conf.d/include/proxy-cache-downloads; <- CULPRIT! -include /etc/nginx/conf.d/include/track-download; -limit_conn downloads_by_ip 100; # ddos protection: max 100 downloads at a time - -# ensure that skylink that we pass around is base64 encoded (transform base32 encoded ones) -# this is important because we want only one format in cache keys and logs -set_by_lua_block $skylink { return require("skynet.skylink").parse(ngx.var.skylink) } - -# $skylink_v1 and $skylink_v2 variables default to the same value but in case the requested skylink was: -# a) skylink v1 - it would not matter, no additional logic is executed -# b) skylink v2 - in a lua block below we will resolve the skylink v2 into skylink v1 and update -# $skylink_v1 variable so then the proxy request to skyd can be cached in nginx (proxy_cache_key -# in proxy-cache-downloads includes $skylink_v1 as a part of the cache key) -set $skylink_v1 $skylink; -set $skylink_v2 $skylink; - -# variable for Skynet-Proof header that we need to inject -# into a response if the request was for skylink v2 -set $skynet_proof ''; - -# default download rate to unlimited -set $limit_rate 0; - -# use this nocache in place of the proxy-cache-downloads -set $nocache "1"; - -access_by_lua_block { - -- the block below only makes sense if we are using nginx cache - if not ngx.var.skyd_disk_cache_enabled then - local httpc = require("resty.http").new() - - -- detect whether requested skylink is v2 - local isBase32v2 = string.len(ngx.var.skylink) == 55 and string.sub(ngx.var.skylink, 0, 2) == "04" - local isBase64v2 = string.len(ngx.var.skylink) == 46 and string.sub(ngx.var.skylink, 0, 2) == "AQ" - - if isBase32v2 or isBase64v2 then - -- 10.10.10.10 points to sia service (alias not available when using resty-http) - local res, err = httpc:request_uri("http://10.10.10.10:9980/skynet/resolve/" .. ngx.var.skylink_v2, { - headers = { ["User-Agent"] = "Sia-Agent" } - }) - - -- print error and exit with 500 or exit with response if status is not 200 - if err or (res and res.status ~= ngx.HTTP_OK) then - ngx.status = (err and ngx.HTTP_INTERNAL_SERVER_ERROR) or res.status - ngx.header["content-type"] = "text/plain" - ngx.say(err or res.body) - return ngx.exit(ngx.status) - end - - local json = require('cjson') - local resolve = json.decode(res.body) - ngx.var.skylink_v1 = resolve.skylink - ngx.var.skynet_proof = res.headers["Skynet-Proof"] - end - - -- check if skylink v1 is present on blocklist (compare hashes) - if require("skynet.blocklist").is_blocked(ngx.var.skylink_v1) then - return require("skynet.blocklist").exit_illegal() - end - - -- if skylink is found on nocache list then set internal nocache variable - -- to tell nginx that it should not try and cache this file (too large) - if ngx.shared.nocache:get(ngx.var.skylink_v1) then - ngx.var.nocache = "1" - end - end - - if require("skynet.account").accounts_enabled() then - -- check if portal is in authenticated only mode - if require("skynet.account").is_access_unauthorized() then - return require("skynet.account").exit_access_unauthorized() - end - - -- check if portal is in subscription only mode - if require("skynet.account").is_access_forbidden() then - return require("skynet.account").exit_access_forbidden() - end - - -- get account limits of currently authenticated user - local limits = require("skynet.account").get_account_limits() - - -- apply download speed limit - ngx.var.limit_rate = limits.download - end +set_by_lua_block $skyd_disk_cache_enabled { + return os.getenv("SKYD_DISK_CACHE_ENABLED") == "true" and "1" or "0" } -header_filter_by_lua_block { - ngx.header["Skynet-Portal-Api"] = ngx.var.scheme .. "://" .. ngx.var.skynet_portal_domain - ngx.header["Skynet-Server-Api"] = ngx.var.scheme .. "://" .. ngx.var.skynet_server_domain - - -- the block below only makes sense if we are using nginx cache - if not ngx.var.skyd_disk_cache_enabled then - -- not empty skynet_proof means this is a skylink v2 request - -- so we should replace the Skynet-Proof header with the one - -- we got from /skynet/resolve/ endpoint, otherwise we would - -- be serving cached empty v1 skylink Skynet-Proof header - if ngx.var.skynet_proof and ngx.var.skynet_proof ~= "" then - ngx.header["Skynet-Proof"] = ngx.var.skynet_proof - end - - -- add skylink to nocache list if it exceeds 1GB (1e+9 bytes) threshold - -- (content length can be nil for already cached files - we can ignore them) - if ngx.header["Content-Length"] and tonumber(ngx.header["Content-Length"]) > 1e+9 then - ngx.shared.nocache:set(ngx.var.skylink_v1, ngx.header["Content-Length"]) - end - end -} - -limit_rate_after 512k; -limit_rate $limit_rate; - -proxy_read_timeout 600; proxy_set_header User-Agent: Sia-Agent; - -# in case the requested skylink was v2 and we already resolved it to skylink v1, we are going to pass resolved -# skylink v1 to skyd to save that extra skylink v2 lookup in skyd but in turn, in case skyd returns a redirect -# we need to rewrite the skylink v1 to skylink v2 in the location header with proxy_redirect -proxy_redirect $skylink_v1 $skylink_v2; -proxy_pass http://sia:9980/skynet/skylink/$skylink_v1$path$is_args$args; +proxy_pass http://sia:9980/skynet/skylink/$skylink$path$is_args$args;