Improve resolver API

resolver/api.go

@@ -0,0 +1,49 @@
+package resolver
+
+import (
+	"github.com/safing/portbase/api"
+)
+
+func registerAPI() error {
+	if err := api.RegisterEndpoint(api.Endpoint{
+		Path:        "dns/clear",
+		Read:        api.PermitUser,
+		ActionFunc:  clearNameCache,
+		Name:        "Clear cached DNS records",
+		Description: "Deletes all saved DNS records from the database.",
+	}); err != nil {
+		return err
+	}
+
+	if err := api.RegisterEndpoint(api.Endpoint{
+		Path:        "dns/resolvers",
+		Read:        api.PermitAnyone,
+		StructFunc:  exportDNSResolvers,
+		Name:        "List DNS Resolvers",
+		Description: "List currently configured DNS resolvers and their status.",
+	}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type resolverExport struct {
+	*Resolver
+	Failing bool
+}
+
+func exportDNSResolvers(*api.Request) (interface{}, error) {
+	resolversLock.RLock()
+	defer resolversLock.RUnlock()
+
+	export := make([]*resolverExport, 0, len(globalResolvers))
+	for _, r := range globalResolvers {
+		export = append(export, &resolverExport{
+			Resolver: r,
+			Failing:  r.Conn.IsFailing(),
+		})
+	}
+
+	return export, nil
+}