Don't cache in lua.

Remove more unnecessary code.

docker/nginx/conf.d/include/location-skylink

@@ -9,14 +9,6 @@ limit_conn downloads_by_ip 100; # ddos protection: max 100 downloads at a time
 # 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 '';
@@ -25,85 +17,23 @@ set $skynet_proof '';
 set $limit_rate 0;
 
 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
+    local accounts = require("skynet.account")
+    if accounts.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()
+        if accounts.is_access_unauthorized() then
+            return accounts.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()
+        if accounts.is_access_forbidden() then
+            return accounts.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
 }
 
 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;
@@ -115,5 +45,4 @@ 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;

docker/nginx/conf.d/include/proxy-cache-downloads

@@ -1,21 +1,4 @@
-proxy_cache skynet; # cache name
-proxy_cache_key $skylink_v1$path$arg_format$arg_attachment$arg_start$arg_end$http_range; # unique cache key
-proxy_cache_min_uses 3; # cache after 3 uses
-proxy_cache_valid 200 206 307 308 48h; # keep 200, 206, 307 and 308 responses valid for up to 2 days
 add_header X-Proxy-Cache $upstream_cache_status; # add response header to indicate cache hits and misses
 
-# map skyd env variable value to "1" for true and "0" for false (expected by proxy_no_cache)
-set_by_lua_block $skyd_disk_cache_enabled {
-    return os.getenv("SKYD_DISK_CACHE_ENABLED") == "true" and "1" or "0"
-}
-
-# bypass - this will bypass cache hit on request (status BYPASS)
-# but still stores file in cache if cache conditions are met
-proxy_cache_bypass $cookie_nocache $arg_nocache $skyd_disk_cache_enabled;
-
-# no cache - this will ignore cache on request (status MISS)
-# and does not store file in cache under no condition
-set_if_empty $nocache "0";
-
-# disable cache when nocache is set or skyd cache is enabled
-proxy_no_cache $nocache $skyd_disk_cache_enabled;
+# disable caching
+proxy_no_cache "1";

docker/nginx/libs/skynet/account.lua

@@ -37,6 +37,7 @@ end
 function _M.get_account_limits()
     local cjson = require('cjson')
 
+    -- TODO: This needs to accommodate authorization tokens and api keys.
     if ngx.var.skynet_jwt == "" then
         return anon_limits
     end
@@ -78,7 +79,7 @@ function _M.has_subscription()
 end
 
 function _M.is_auth_required()
-    return os.getenv("ACCOUNTS_LIMIT_ACCESS") == "authenticated"
+    return os.getenv("ACCOUNTS_LIMIT_ACCESS") == "authenticated" or os.getenv("ACCOUNTS_LIMIT_ACCESS") == "subscription"
 end
 
 function _M.is_subscription_required()