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