proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=skynet:10m max_size=10g use_temp_path=off; # ratelimit specified IPs geo $limit { default 0; include /etc/nginx/conf.d/include/ratelimited; } map $limit $limit_key { 0 ""; 1 $binary_remote_addr; } limit_req_zone $binary_remote_addr zone=uploads_by_ip:10m rate=10r/s; limit_req_zone $limit_key zone=uploads_by_ip_throttled:10m rate=10r/m; limit_req_zone $binary_remote_addr zone=registry_access_by_ip:10m rate=60r/m; limit_req_zone $limit_key zone=registry_access_by_ip_throttled:10m rate=20r/m; limit_conn_zone $binary_remote_addr zone=upload_conn:10m; limit_conn_zone $limit_key zone=upload_conn_rl:10m; limit_conn_zone $binary_remote_addr zone=downloads_by_ip:10m; limit_req_status 429; limit_conn_status 429; # since we are proxying request to nginx from caddy, access logs will contain caddy's ip address # as the request address so we need to use real_ip_header module to use ip address from # X-Forwarded-For header as a real ip address of the request set_real_ip_from 10.0.0.0/8; set_real_ip_from 127.0.0.1/32; set_real_ip_from 172.16.0.0/12; set_real_ip_from 192.168.0.0/16; real_ip_header X-Forwarded-For; upstream siad { server sia:9980; } server { listen 80 default_server; listen [::]:80 default_server; # understand the regex https://regex101.com/r/BGQvi6/6 server_name "~^(((?([a-z0-9]{55}))|(?[^\.]+)\.hns)\.)?((?[^.]+)\.)?(?[^.]+)\.(?[^.]+)$"; # ddos protection: closing slow connections client_body_timeout 5s; client_header_timeout 5s; # Increase the body buffer size, to ensure the internal POSTs can always # parse the full POST contents into memory. client_body_buffer_size 128k; client_max_body_size 128k; # legacy endpoint rewrite rewrite ^/portals /skynet/portals permanent; rewrite ^/stats /skynet/stats permanent; rewrite ^/skynet/blacklist /skynet/blocklist permanent; location / { # This is only safe workaround to reroute based on some conditions # See https://www.nginx.com/resources/wiki/start/topics/depth/ifisevil/ recursive_error_pages on; # redirect links with base32 encoded skylink in subdomain error_page 460 = @base32_subdomain; if ($base32_subdomain != "") { return 460; } # redirect links with handshake domain on hns subdomain error_page 461 = @hns_domain; if ($hns_domain != "") { return 461; } include /etc/nginx/conf.d/include/cors; root /var/www/webportal; } location /docs { proxy_pass https://nebulouslabs.github.io/skynet-docs; } location /skynet/blocklist { include /etc/nginx/conf.d/include/cors; proxy_cache skynet; proxy_cache_valid any 1m; # cache blocklist for 1 minute proxy_set_header User-Agent: Sia-Agent; proxy_pass http://siad/skynet/blocklist; } location /skynet/portals { include /etc/nginx/conf.d/include/cors; proxy_cache skynet; proxy_cache_valid any 1m; # cache portals for 1 minute proxy_set_header User-Agent: Sia-Agent; proxy_pass http://siad/skynet/portals; } location /skynet/stats { include /etc/nginx/conf.d/include/cors; set $response_body ''; # we need a variable for full response body (not chuncked) # modify the response to add numfiles and totalsize to account for node rotation # example prevstats.lua: 'return { numfiles = 12345, totalsize = 123456789 }' body_filter_by_lua_block { local file_exists = io.open("/data/nginx/skynet/prevstats.lua") if file_exists then file_exists.close() -- because response data is chunked, we need to concat ngx.arg[1] until -- last chunk is received (when ngx.arg[2] is set to true) ngx.var.response_body = ngx.var.response_body .. ngx.arg[1] if ngx.arg[2] then local json = require('cjson') local prevstats = require('/data/nginx/skynet/prevstats') local stats = json.decode(ngx.var.response_body) stats.uploadstats.numfiles = stats.uploadstats.numfiles + prevstats.numfiles stats.uploadstats.totalsize = stats.uploadstats.totalsize + prevstats.totalsize ngx.arg[1] = json.encode(stats) else -- do not send any data in this chunk (wait for last chunk) ngx.arg[1] = nil end end } proxy_cache skynet; proxy_cache_valid any 10m; # cache stats for 10 minutes proxy_set_header User-Agent: Sia-Agent; proxy_read_timeout 5m; # extend the read timeout proxy_pass http://siad/skynet/stats; } location /health-check { include /etc/nginx/conf.d/include/cors; access_log off; # do not log traffic to health-check endpoint proxy_pass http://health-check:3100; } location /hns { include /etc/nginx/conf.d/include/proxy-buffer; # variable definititions - we need to define a variable to be able to access it in lua by ngx.var.something set $skylink ''; # placeholder for the raw 46 bit skylink set $rest ''; # placeholder for the rest of the url that gets appended to skylink (path and args) # resolve handshake domain by requesting to /hnsres endpoint and assign correct values to $skylink and $rest access_by_lua_block { local json = require('cjson') -- match the request_uri and extract the hns domain and anything that is passed in the uri after it -- example: /hns/something/foo/bar?baz=1 matches: -- > hns_domain_name: something -- > request_uri_rest: /foo/bar/?baz=1 local hns_domain_name, request_uri_rest = string.match(ngx.var.request_uri, "/hns/([^/?]+)(.*)") -- make a get request to /hnsres endpoint with the domain name from request_uri local hnsres_res = ngx.location.capture("/hnsres/" .. hns_domain_name) -- we want to fail with a generic 404 when /hnsres returns anything but 200 OK with a skylink if hnsres_res.status ~= ngx.HTTP_OK then ngx.exit(ngx.HTTP_NOT_FOUND) end -- since /hnsres endpoint response is a json, we need to decode it before we access it -- example response: '{"skylink":"sia://XABvi7JtJbQSMAcDwnUnmp2FKDPjg8_tTTFP4BwMSxVdEg"}' local hnsres_json = json.decode(hnsres_res.body) if hnsres_json.skylink then -- try to match the skylink with sia:// prefix skylink, skylink_rest = string.match(hnsres_json.skylink, "sia://([^/?]+)(.*)") -- in case the skylink did not match, assume that there is no sia:// prefix and try to match again if skylink == nil then skylink, skylink_rest = string.match(hnsres_json.skylink, "/?([^/?]+)(.*)") end elseif hnsres_json.registry then local publickey = hnsres_json.registry.publickey local datakey = hnsres_json.registry.datakey -- make a get request to /skynet/registry endpoint with the credentials from text record local registry_res = ngx.location.capture("/skynet/registry?publickey=" .. publickey .. "&datakey=" .. datakey) -- we want to fail with a generic 404 when /skynet/registry returns anything but 200 OK if registry_res.status ~= ngx.HTTP_OK then ngx.exit(ngx.HTTP_NOT_FOUND) end -- since /skynet/registry endpoint response is a json, we need to decode it before we access it local registry_json = json.decode(registry_res.body) -- response will contain a hex encoded skylink, we need to decode it local data = (registry_json.data:gsub('..', function (cc) return string.char(tonumber(cc, 16)) end)) skylink = data end -- fail with a generic 404 if skylink has not been extracted from a valid /hnsres response for some reason if not skylink then ngx.exit(ngx.HTTP_NOT_FOUND) end ngx.var.skylink = skylink if request_uri_rest == "/" and skylink_rest ~= "" and skylink_rest ~= "/" then ngx.var.rest = skylink_rest else ngx.var.rest = request_uri_rest end } # overwrite the Cache-Control header to only cache for 60s in case the domain gets updated more_set_headers 'Cache-Control: public, max-age=60'; # we proxy to another nginx location rather than directly to siad because we don't want to deal with caching here proxy_pass http://127.0.0.1/$skylink$rest; # in case siad returns location header, we need to replace the skylink with the domain name header_filter_by_lua_block { if ngx.header.location then -- match hns domain from the request_uri local hns_domain_name = string.match(ngx.var.request_uri, "/hns/([^/?]+)") -- match location redirect part after the skylink local location_rest = string.match(ngx.header.location, "[^/?]+(.*)"); -- because siad will set the location header to ie. XABvi7JtJbQSMAcDwnUnmp2FKDPjg8_tTTFP4BwMSxVdEg/index.html -- we need to replace the skylink with the domain_name so we are not redirected to skylink ngx.header.location = hns_domain_name .. location_rest end } } location /hnsres { include /etc/nginx/conf.d/include/cors; proxy_pass http://handshake-api:3100; } location /skynet/registry { include /etc/nginx/conf.d/include/cors; include /etc/nginx/conf.d/include/sia-auth; limit_req zone=registry_access_by_ip burst=600 nodelay; limit_req zone=registry_access_by_ip_throttled burst=200 nodelay; proxy_set_header User-Agent: Sia-Agent; proxy_read_timeout 600; # siad should timeout with 404 after 5 minutes proxy_pass http://siad/skynet/registry; } location /skynet/skyfile { include /etc/nginx/conf.d/include/cors; include /etc/nginx/conf.d/include/sia-auth; limit_req zone=uploads_by_ip burst=100 nodelay; limit_req zone=uploads_by_ip_throttled; limit_conn upload_conn 10; limit_conn upload_conn_rl 1; client_max_body_size 1000M; # make sure to limit the size of upload to a sane value proxy_read_timeout 600; proxy_request_buffering off; # stream uploaded files through the proxy as it comes in proxy_set_header Expect $http_expect; proxy_set_header User-Agent: Sia-Agent; # Extract 3 sets of 2 characters from $request_id and assign to $dir1, $dir2, $dir3 # respectfully. The rest of the $request_id is going to be assigned to $dir4. # We use those variables to automatically generate a unique path for the uploaded file. # This ensures that not all uploaded files end up in the same directory, which is something # that causes performance issues in the renter. # Example path result: /af/24/9b/c5ec894920ccc45634dc9a8065 if ($request_id ~* "(\w{2})(\w{2})(\w{2})(\w+)") { set $dir1 $1; set $dir2 $2; set $dir3 $3; set $dir4 $4; } # proxy this call to siad endpoint (make sure the ip is correct) proxy_pass http://siad/skynet/skyfile/$dir1/$dir2/$dir3/$dir4$is_args$args; } location ~ "^/(([a-zA-Z0-9-_]{46}|[a-z0-9]{55})(/.*)?)$" { include /etc/nginx/conf.d/include/cors; include /etc/nginx/conf.d/include/proxy-buffer; include /etc/nginx/conf.d/include/proxy-cache-downloads; # redirect purge calls to separate location error_page 462 = @purge; if ($request_method = PURGE) { return 462; } limit_conn downloads_by_ip 100; # ddos protection: max 100 downloads at a time add_header Cache-Control "public, max-age=86400"; # allow consumer to cache response # we need to explicitly use set directive here because $1 will contain the skylink with # decoded whitespaces and set will re-encode it for us before passing it to proxy_pass set $skylink $1; proxy_read_timeout 600; proxy_set_header User-Agent: Sia-Agent; # proxy this call to siad /skynet/skylink/ endpoint (make sure the ip is correct) proxy_pass http://siad/skynet/skylink/$skylink$is_args$args; } location @base32_subdomain { include /etc/nginx/conf.d/include/proxy-buffer; proxy_pass http://127.0.0.1/$base32_subdomain/$request_uri; } location @hns_domain { include /etc/nginx/conf.d/include/proxy-buffer; proxy_pass http://127.0.0.1/hns/$hns_domain/$request_uri; } location @purge { allow 10.0.0.0/8; allow 127.0.0.1/32; allow 172.16.0.0/12; allow 192.168.0.0/16; deny all; set $lua_purge_path "/data/nginx/cache/"; content_by_lua_file /etc/nginx/conf.d/scripts/purge-multi.lua; } location ~ "^/file/([a-zA-Z0-9-_]{46}(/.*)?)$" { include /etc/nginx/conf.d/include/proxy-buffer; rewrite /file/(.*) $1 break; # drop the /file/ prefix from uri proxy_pass http://127.0.0.1/$uri?attachment=true&$args; } # include custom locations, specific to the server include /etc/nginx/conf.d/server-override/*; }