104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
/*
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Copyright 2024.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package server
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import (
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"context"
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"errors"
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"fmt"
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"log/slog"
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"net"
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"net/http"
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"time"
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ctrl "sigs.k8s.io/controller-runtime"
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"github.com/kubeflow/notebooks/workspaces/backend/api"
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)
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const (
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maxHeaderBytes = 1 << 17 // 128 KiB - default is 1MiB
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maxBodyBytes = 1 << 22 // 4 MiB - default is unlimited
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)
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type Server struct {
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logger *slog.Logger
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listener net.Listener
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server *http.Server
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}
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func NewServer(app *api.App, logger *slog.Logger) (*Server, error) {
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listener, err := net.Listen("tcp", fmt.Sprintf(":%d", app.Config.Port))
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if err != nil {
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return nil, fmt.Errorf("failed to create listener: %w", err)
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}
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svc := &http.Server{
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Addr: fmt.Sprintf(":%d", app.Config.Port),
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Handler: http.MaxBytesHandler(app.Routes(), maxBodyBytes),
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IdleTimeout: 90 * time.Second, // matches http.DefaultTransport keep-alive timeout
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ReadTimeout: 32 * time.Second,
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ReadHeaderTimeout: 32 * time.Second,
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WriteTimeout: 32 * time.Second,
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MaxHeaderBytes: maxHeaderBytes,
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ErrorLog: slog.NewLogLogger(logger.Handler(), slog.LevelError),
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}
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svr := &Server{
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logger: logger,
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listener: listener,
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server: svc,
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}
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return svr, nil
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}
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// SetupWithManager sets up the app with a controller-runtime manager
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func (s *Server) SetupWithManager(mgr ctrl.Manager) error {
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err := mgr.Add(s)
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if err != nil {
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return err
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}
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return nil
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}
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// Start starts the server
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// Blocks until the context is canceled
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func (s *Server) Start(ctx context.Context) error {
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serverShutdown := make(chan struct{})
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go func() {
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<-ctx.Done()
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s.logger.Info("shutting down server")
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if err := s.server.Shutdown(context.Background()); err != nil {
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s.logger.Error("error shutting down server", "error", err)
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}
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close(serverShutdown)
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}()
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s.logger.Info("starting server", "addr", s.server.Addr)
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if err := s.server.Serve(s.listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
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return err
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}
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<-serverShutdown
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return nil
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}
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// NeedLeaderElection returns false because this app does not need leader election from the manager
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func (s *Server) NeedLeaderElection() bool {
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return false
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}
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