Lubinas app

main.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"git.balsys.eu.org/tomas/pocketbase/lubinui"
+	"git.balsys.eu.org/tomas/pocketbase/ui"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/apis"
+	"github.com/pocketbase/pocketbase/core"
+)
+
+func main() {
+	app := pocketbase.New()
+
+	app.OnServe().BindFunc(routes)
+
+	app.OnRecordViewRequest().BindFunc(addLastModified)
+
+	app.OnRecordUpdateRequest().BindFunc(ifUnmodifiedSince)
+
+	app.OnRecordDeleteRequest().BindFunc(ifUnmodifiedSince)
+
+	if err := app.Start(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func routes(se *core.ServeEvent) error {
+	se.Router.GET("/admin/{path...}", apis.Static(ui.DistDirFS, false)).
+		BindFunc(routeAdmin).
+		Bind(apis.Gzip())
+
+	se.Router.GET("/{path...}", apis.Static(lubinui.DistDirFS, true)).
+		BindFunc(routeRoot).
+		Bind(apis.Gzip())
+
+	return se.Next()
+}
+
+func routeAdmin(e *core.RequestEvent) error {
+	// ignore root path
+	if e.Request.PathValue(apis.StaticWildcardParam) != "" {
+		e.Response.Header().Set("Cache-Control", "max-age=1209600, stale-while-revalidate=86400")
+	}
+
+	// add a default CSP
+	if e.Response.Header().Get("Content-Security-Policy") == "" {
+		e.Response.Header().Set("Content-Security-Policy", "default-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' http://127.0.0.1:* https://tile.openstreetmap.org data: blob:; connect-src 'self' http://127.0.0.1:* https://nominatim.openstreetmap.org; script-src 'self' 'sha256-GRUzBA7PzKYug7pqxv5rJaec5bwDCw1Vo6/IXwvD3Tc='")
+	}
+
+	return e.Next()
+}
+
+func routeRoot(e *core.RequestEvent) error {
+	// ignore root path
+	if e.Request.PathValue(apis.StaticWildcardParam) != "" {
+		e.Response.Header().Set("Cache-Control", "max-age=1209600, stale-while-revalidate=86400")
+	}
+
+	return e.Next()
+}
+
+func addLastModified(e *core.RecordRequestEvent) error {
+	updated := e.Record.GetString("updated")
+
+	if updated != "" {
+		e.Response.Header().Add("Last-Modified", updated)
+	}
+
+	return e.Next()
+}
+
+func ifUnmodifiedSince(e *core.RecordRequestEvent) error {
+	updated := e.Record.GetString("updated")
+
+	if updated != "" {
+		header := e.Request.Header.Get("If-Unmodified-Since")
+
+		if header == "" || header != updated {
+			e.Response.Header().Add("Last-Modified", updated)
+
+			if header == "" {
+				return e.Error(http.StatusPreconditionRequired, "Header If-Unmodified-Since is required", nil)
+			} else if header != updated {
+				return e.Error(http.StatusPreconditionFailed, "Record was modified after retrieval", nil)
+			}
+		}
+	}
+
+	return e.Next()
+}