Update README.md

README.md

@@ -1,3 +1,73 @@
 # golang-utils
 
 Different kind of functions for second reusage
+
+## utils/http/apiserv
+
+Web server, which can use regular expressions in path. Designed to be simple and for usage for project with API and etc
+
+```go
+package server
+
+import (
+    "context"
+    "fmt"
+    "net/http"
+    ...
+)
+
+// External package
+type base.Handler struct {
+    Ctx      context.Context
+    DB       *database.DataBase
+    Shutdown context.CancelFunc
+}
+
+func NewMux(ctx context.Context, shutdown context.CancelFunc, db *database.DataBase) *apiserv.ServeMux {
+    mux := apiserv.NewServeMux()
+
+    handler := base.Handler{
+        Ctx:      ctx,
+        DB:       db,
+        Shutdown: shutdown,
+    }
+
+    // Pages
+    mux.Get("/", page_index.Handler{Handler: handler})
+    mux.Get("/about", page_about.Handler{Handler: handler})
+
+    // API
+    mux.Get("/api/v1/app/health", v1_app_health.Handler{Handler: handler})
+    mux.Handle("/api/v1/aliases", []string{http.MethodGet, http.MethodPost}, v1_aliases.Handler{Handler: handler})  
+    mux.Handle("/api/v1/aliases/{i}", []string{http.MethodGet, http.MethodPut, http.MethodDelete}, v1_aliases.Handler{Handler: handler})
+
+    // Assets
+    mux.Get("/favicon.png", helpers.HandleImagePng(web.FaviconPng))
+    mux.Get("/robots.txt", helpers.HandleTextPlain(web.RobotsTxt))
+    mux.Get("/sitemap.xml", helpers.HandleTextXml(web.SitemapXml))
+
+    // 404
+    mux.NotFound(page_404.Handler{Handler: handler})
+
+    return mux
+}
+
+func New(ctx context.Context, shutdown context.CancelFunc, db *database.DataBase) (*http.Server, error) {
+    mux := NewMux(ctx, shutdown, db)
+    srv := &http.Server{
+    Addr:   consts.Config.Host + ":" + consts.Config.Port,
+            Handler: mux,
+    }
+    go func() {
+        fmt.Printf("Web server: http://%s:%s/\n", consts.Config.Host, consts.Config.Port)
+        if err := srv.ListenAndServe(); err != nil {
+            if err != http.ErrServerClosed {
+                fmt.Printf("Web server startup error: %s\n", err.Error())
+                shutdown()
+                return
+            }
+        }
+    }()
+    return srv, nil
+}
+```