feat: add configuration options to accomodate first party tealium and adobe analytics

src/Dockerfile

@@ -4,7 +4,7 @@ RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-http
 RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-cookie
 RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-iputils
 
-RUN apk add openssl certbot
+RUN apk add --no-cache ca-certificates certbot openssl
 RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-auto-ssl
 
 RUN mkdir /etc/resty-auto-ssl && chown -R nobody /etc/resty-auto-ssl

src/default.conf

@@ -6,6 +6,8 @@ lua_package_path "/opt/sitelen-tu/?.lua;;";
 lua_shared_dict auto_ssl 1m;
 lua_shared_dict auto_ssl_settings 64k;
 
+lua_ssl_trusted_certificate "/etc/ssl/certs/ca-certificates.crt";
+
 resolver 127.0.0.11 valid=60 ipv6=off;
 
 init_by_lua_block {
@@ -44,6 +46,7 @@ server {
         # These variables are set in the access_by_lua stage
         # TODO: These might be better to set with a set_by_lua_block
         set $jasima_host "fallback.invalid";
+        set $jasima_host_connect "fallback.invalid";
         set $jasima_host_header "fallback.invalid";
         set $jasima_host_ssl "fallback.invalid";
 

src/lua/access.lua

@@ -1,7 +1,6 @@
-local http = require "resty.http"
-
 local config = require "config"
 local geo = require "geo"
+local psl = require "psl"
 local utils = require "utils"
 
 local jasima_host = config.get_jasima_host()
@@ -61,11 +60,45 @@ if ngx.ctx.jasima_config.headers then
     end
 end
 
--- Look up the IP to connect to the origin
 local host_connect = ngx.ctx.jasima_config.host_connect or jasima_host
+local host_header = ngx.ctx.jasima_config.host_header or jasima_host
+local host_ssl = ngx.ctx.jasima_config.host_ssl or jasima_host
+
+-- Handle first party Tealium installations
+if ngx.ctx.jasima_config.first_party_tealium then
+    local tealium = ngx.ctx.jasima_config.first_party_tealium
+    if tealium.subdomain and tealium.account then
+        local _, _, _, matched = ngx.var.request_uri:match("^/utag/([^/]+)/([^/]+)/([^/]+)/utag(.-)js")
+        if matched then
+            ngx.log(ngx.DEBUG, "Matched as a Tealium universal tag script " .. tostring(matched))
+            host_connect = "tags.tiqcdn.com"
+            host_header = "tags.tiqcdn.com"
+            host_ssl = "tags.tiqcdn.com"
+        end
+        ngx.ctx.jasima_host_tealium = tealium.subdomain .. "." .. psl.get_registered_domain(ngx.ctx.jasima_host)
+        ngx.log(ngx.DEBUG, "Using first-party Tealium hostname " .. ngx.ctx.jasima_host_tealium)
+    end
+end
+
+-- Handle first party Adobe Analytics
+if ngx.ctx.jasima_config.first_party_adobe then
+    local adobe = ngx.ctx.jasima_config.first_party_adobe
+    if adobe.subdomain and adobe.account then
+        local matched = ngx.var.request_uri:match("^/b/ss/")
+        if matched then
+            ngx.log(ngx.DEBUG, "Matched as an Adobe Analytics request " .. tostring(matched))
+            host_connect = adobe.account .. ".sc.omtrdc.net"
+            host_header = host_connect
+            host_ssl = host_connect
+        end
+        ngx.ctx.jasima_host_adobe = adobe.subdomain .. "." .. psl.get_registered_domain(ngx.ctx.jasima_host)
+        ngx.log(ngx.DEBUG, "Using first-party Adobe Analytics hostname " .. ngx.ctx.jasima_host_adobe)
+    end
+end
+
+-- Look up the IP to connect to the origin
 local upstream_ips = utils.resolve_origin(host_connect)
 ngx.ctx.upstream_ips = utils.filter_bogons(upstream_ips)
-
 if #ngx.ctx.upstream_ips == 0 then
     ngx.log(ngx.ERR, "no A records found")
     return ngx.exit(500)
@@ -73,5 +106,6 @@ end
 
 -- Set the nginx host variables
 ngx.var.jasima_host = jasima_host
-ngx.var.jasima_host_header = ngx.ctx.jasima_config.host_header or jasima_host
+ngx.var.jasima_host_connect = host_connect
-ngx.var.jasima_host_ssl = ngx.ctx.jasima_config.host_ssl or jasima_host
+ngx.var.jasima_host_header = host_header
+ngx.var.jasima_host_ssl = host_ssl

src/lua/body_filter.lua

@@ -39,6 +39,21 @@ local function rewrite_body(body, eof)
         body = body:gsub("</body>", matomo_tracking_code(ngx.ctx.jasima_config.matomo_site_id))
         -- TODO: Ensure that tracking code was added when it's HTML, but only for HTML
     end
+    -- Handle first party Tealium installations
+    if ngx.ctx.jasima_host_tealium then
+        local escaped_host = ngx.ctx.jasima_host_tealium:gsub("%.", "%%.")
+        body = body:gsub("(https:)??//" .. escaped_host .. "/", "/utag/" .. ngx.ctx.jasima_config.first_party_tealium.account .. "/")
+        body = body:gsub("//tags.tiqcdn.com/", "/")
+        if ngx.var.jasima_host_connect == "tags.tiqcdn.com" and ngx.ctx.jasima_host_adobe then
+            body, count = body:gsub([[return"http"%+%(a%.ssl%?"s":""%)%+"://"%+b%+"/b/ss/]], [[return"/b/ss/]])
+            ngx.log(ngx.DEBUG, "Performing rewrite for Adobe Analytics in Tealium tag " .. count)
+        end
+    end
+    -- Handle first party Adobe Analytics
+    if ngx.ctx.jasima_host_adobe then
+        local escaped_host = ngx.ctx.jasima_host_adobe:gsub("%.", "%%.")
+        body = body:gsub("(https:)??//" .. escaped_host .. "/", "/")
+    end
     return body
 end