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84c1322c44
Author | SHA1 | Date |
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Brian Picciano | 84c1322c44 | 1 year ago |
Brian Picciano | 0bd8bd6f23 | 1 year ago |
@ -1,2 +1,122 @@ |
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// Package gmi contains utilities for working with gemini and gemtext
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// Package gmi implements the gemini-based api for the mediocre-blog.
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package gmi |
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import ( |
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"context" |
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"errors" |
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"fmt" |
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"net/url" |
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"os" |
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"strings" |
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"git.sr.ht/~adnano/go-gemini" |
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"git.sr.ht/~adnano/go-gemini/certificate" |
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"github.com/mediocregopher/blog.mediocregopher.com/srv/cfg" |
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"github.com/mediocregopher/mediocre-go-lib/v2/mctx" |
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"github.com/mediocregopher/mediocre-go-lib/v2/mlog" |
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) |
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// Params are used to instantiate a new API instance. All fields are required
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// unless otherwise noted.
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type Params struct { |
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Logger *mlog.Logger |
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PublicURL *url.URL |
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ListenAddr string |
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CertificatesPath string |
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} |
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// SetupCfg implement the cfg.Cfger interface.
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func (p *Params) SetupCfg(cfg *cfg.Cfg) { |
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publicURLStr := cfg.String("gemini-public-url", "gemini://localhost:2065", "URL this service is accessible at") |
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cfg.StringVar(&p.ListenAddr, "gemini-listen-addr", ":2065", "Address to listen for HTTP requests on") |
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cfg.StringVar(&p.CertificatesPath, "gemini-certificates-path", "", "Path to directory where gemini certs should be created/stored") |
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cfg.OnInit(func(context.Context) error { |
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if p.CertificatesPath == "" { |
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return errors.New("-gemini-certificates-path is required") |
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} |
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var err error |
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*publicURLStr = strings.TrimSuffix(*publicURLStr, "/") |
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if p.PublicURL, err = url.Parse(*publicURLStr); err != nil { |
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return fmt.Errorf("parsing -gemini-public-url: %w", err) |
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} |
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return nil |
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}) |
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} |
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// Annotate implements mctx.Annotator interface.
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func (p *Params) Annotate(a mctx.Annotations) { |
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a["geminiPublicURL"] = p.PublicURL |
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a["geminiListenAddr"] = p.ListenAddr |
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a["geminiCertificatesPath"] = p.CertificatesPath |
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} |
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// API will listen on the port configured for it, and serve gemini requests for
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// the mediocre-blog.
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type API interface { |
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Shutdown(ctx context.Context) error |
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} |
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type api struct { |
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params Params |
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srv *gemini.Server |
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} |
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// New initializes and returns a new API instance, including setting up all
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// listening ports.
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func New(params Params) (API, error) { |
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if err := os.MkdirAll(params.CertificatesPath, 0700); err != nil { |
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return nil, fmt.Errorf("creating certificate directory %q: %w", params.CertificatesPath, err) |
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} |
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certStore := new(certificate.Store) |
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certStore.Load(params.CertificatesPath) |
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certStore.Register(params.PublicURL.Hostname()) |
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a := &api{ |
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params: params, |
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} |
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a.srv = &gemini.Server{ |
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Addr: params.ListenAddr, |
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Handler: a.handler(), |
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GetCertificate: certStore.Get, |
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} |
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go func() { |
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ctx := mctx.WithAnnotator(context.Background(), &a.params) |
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err := a.srv.ListenAndServe(ctx) |
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if err != nil && !errors.Is(err, context.Canceled) { |
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a.params.Logger.Fatal(ctx, "serving gemini server", err) |
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} |
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}() |
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return a, nil |
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} |
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func (a *api) Shutdown(ctx context.Context) error { |
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return a.srv.Shutdown(ctx) |
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} |
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func (a *api) handler() gemini.Handler { |
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return gemini.HandlerFunc(func( |
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ctx context.Context, |
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rw gemini.ResponseWriter, |
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r *gemini.Request, |
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) { |
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fmt.Fprintf(rw, "# Test\n\n") |
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fmt.Fprintf(rw, "HELLO WORLD\n\n") |
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fmt.Fprintf(rw, "=> gemini://midnight.pub Hit the pub\n\n") |
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}) |
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} |
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