92 lines
3 KiB
Go
92 lines
3 KiB
Go
// SPDX-FileCopyrightText: 2021 Luke Granger-Brown <depot@lukegb.com>
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//
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// SPDX-License-Identifier: Apache-2.0
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package cmd
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import (
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"context"
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"fmt"
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"log"
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"net/http"
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"os/exec"
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"strings"
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"github.com/google/safehtml"
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"github.com/spf13/cobra"
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"hg.lukegb.com/lukegb/depot/web/fup/fuphttp"
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"hg.lukegb.com/lukegb/depot/web/fup/fupstatic"
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"hg.lukegb.com/lukegb/depot/web/fup/minicheddar"
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)
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func init() {
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rootCmd.AddCommand(serveCmd)
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serveCmd.Flags().StringVar(&serveRoot, "root", "http://localhost:8191/", "Application root address.")
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serveCmd.Flags().StringVar(&serveStaticRoot, "static-root", "/static/", "Root address from which static assets should be referenced.")
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serveCmd.Flags().StringVarP(&serveBind, "listen", "l", ":8191", "Bind address for HTTP server.")
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serveCmd.Flags().BoolVar(&serveDirectOnly, "direct-only", false, "If set, all file serving will be proxied, even if the backend supports signed URLs.")
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serveCmd.Flags().StringVar(&serveCheddarPath, "cheddar-path", "cheddar", "Path to 'cheddar' binary to use for syntax highlighting. If it cannot be found, syntax highlighting and markdown rendering will be disabled.")
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serveCmd.Flags().StringVar(&serveCheddarAddr, "cheddar-address", "", "If non-empty, will be used instead of attempting to spawn a copy of cheddar.")
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}
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var (
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serveBind string
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serveRoot string
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serveStaticRoot string
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serveDirectOnly bool
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serveCheddarPath string
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serveCheddarAddr string
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serveCmd = &cobra.Command{
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Use: "serve",
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Short: "Serve HTTP",
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RunE: func(cmd *cobra.Command, args []string) error {
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if !strings.HasSuffix(serveRoot, "/") {
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return fmt.Errorf("--root flag should end in / (value is %q)", serveRoot)
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}
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if !strings.HasSuffix(serveStaticRoot, "/") {
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return fmt.Errorf("--static-root flag should end in / (value is %q)", serveStaticRoot)
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}
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ctx := context.Background()
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highlighter, err := serveCheddar(ctx)
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if err != nil {
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return fmt.Errorf("spawning cheddar syntax highlighter: %v", err)
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}
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cfg := &fuphttp.Config{
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Templates: fupstatic.Templates,
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Static: fupstatic.Static,
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StaticRoot: safehtml.TrustedResourceURLFromFlag(cmd.Flag("static-root").Value),
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AppRoot: serveRoot,
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StorageURL: bucketURL,
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RedirectToBlobstore: !serveDirectOnly,
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Highlighter: highlighter,
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}
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a, err := fuphttp.New(ctx, cfg)
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if err != nil {
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return fmt.Errorf("constructing application: %w", err)
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}
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http.Handle("/", a.Handler())
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http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.FS(fupstatic.Static))))
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log.Printf("Serving on %s", serveBind)
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return http.ListenAndServe(serveBind, nil)
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},
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}
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)
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func serveCheddar(ctx context.Context) (*minicheddar.Cheddar, error) {
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if serveCheddarAddr != "" {
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return minicheddar.Remote(serveCheddarAddr), nil
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}
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cpath, err := exec.LookPath(serveCheddarPath)
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if err != nil {
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log.Printf("couldn't find cheddar at %q; disabling syntax highlighting", serveCheddarPath)
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return nil, nil
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}
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return minicheddar.Spawn(ctx, cpath)
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}
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