experimental path based routing

src/provider.lua

@@ -131,7 +131,7 @@ local function get_debug_value()
   end
 end
 
-function _M.find_service(host)
+local function find_service_strict(host)
   for _,service in ipairs(_M.services or {}) do
     for _,_host in ipairs(service.hosts or {}) do
       if _host == host then
@@ -141,6 +141,29 @@ function _M.find_service(host)
   end
 end
 
+local function find_service_cascade(host)
+  local request = ngx.var.request
+  for _,service in ipairs(_M.services or {}) do
+    for _,_host in ipairs(service.hosts or {}) do
+      if _host == host then
+        local usage, matched_patterns = service:extract_usage(request)
+
+        if next(usage) and matched_patterns ~= '' then
+          return service
+        end
+      end
+    end
+  end
+
+  return find_service_strict(host)
+end
+
+if os.getenv('APICAST_PATH_ROUTING_ENABLED') then
+  _M.find_service = find_service_cascade
+else
+  _M.find_service = find_service_strict
+end
+
 local http = {
   get = function(url)
     ngx.log(ngx.INFO, '[http] requesting ' .. url)