1package main
  2
  3import (
  4	"bytes"
  5	"crypto/tls"
  6	"crypto/x509/pkix"
  7	gmi "git.sr.ht/~adnano/go-gemini"
  8	"io"
  9	"io/ioutil"
 10	"log"
 11	"os"
 12	"path"
 13	"path/filepath"
 14	"strings"
 15	"text/template"
 16	"time"
 17)
 18
 19var gt *template.Template
 20
 21func generateGemfeedPage(user string) string {
 22	feed := generateFeedFromUser(user)
 23	data := struct {
 24		Host        string
 25		Title       string
 26		FeedEntries []FeedEntry
 27	}{c.Host, feed.Title, feed.Entries}
 28	var buff bytes.Buffer
 29	gt.ExecuteTemplate(&buff, "gemfeed.gmi", data)
 30	return buff.String()
 31}
 32
 33func generateFolderPage(fullpath string) string {
 34	files, _ := ioutil.ReadDir(fullpath)
 35	var renderedFiles = []File{}
 36	for _, file := range files {
 37		// Very awkward
 38		res := fileFromPath(path.Join(fullpath, file.Name()))
 39		renderedFiles = append(renderedFiles, res)
 40	}
 41	var buff bytes.Buffer
 42	data := struct {
 43		Host   string
 44		Folder string
 45		Files  []File
 46	}{c.Host, getLocalPath(fullpath), renderedFiles}
 47	err := gt.ExecuteTemplate(&buff, "folder.gmi", data)
 48	if err != nil {
 49		log.Println(err)
 50		return ""
 51	}
 52	return buff.String()
 53}
 54
 55func gmiIndex(w *gmi.ResponseWriter, r *gmi.Request) {
 56	log.Println("Index request")
 57	t, err := template.ParseFiles("templates/index.gmi")
 58	if err != nil {
 59		log.Fatal(err)
 60	}
 61	files, err := getIndexFiles(false)
 62	users, err := getActiveUserNames()
 63	if err != nil {
 64		log.Println(err)
 65		w.WriteHeader(40, "Internal server error")
 66	}
 67	data := struct {
 68		Host      string
 69		SiteTitle string
 70		Files     []*File
 71		Users     []string
 72	}{
 73		Host:      c.Host,
 74		SiteTitle: c.SiteTitle,
 75		Files:     files,
 76		Users:     users,
 77	}
 78	t.Execute(w, data)
 79}
 80
 81func gmiPage(w *gmi.ResponseWriter, r *gmi.Request) {
 82	userName := filepath.Clean(strings.Split(r.URL.Host, ".")[0]) // clean probably unnecessary
 83	fileName := filepath.Clean(r.URL.Path)
 84	if fileName == "/" {
 85		fileName = "index.gmi"
 86	} else if strings.HasPrefix(fileName, "/"+HiddenFolder) {
 87		w.WriteStatus(gmi.StatusNotFound)
 88		return
 89	}
 90	log.Println("Request for gemini file", fileName, "for user", userName)
 91	fullPath := path.Join(c.FilesDirectory, userName, fileName)
 92	if fileName == "/gemlog" { // temp hack
 93		_, err := os.Stat(path.Join(fullPath, "index.gmi"))
 94		if err != nil {
 95			w.SetMediaType("text/gemini")
 96			io.Copy(w, strings.NewReader(generateGemfeedPage(userName)))
 97			return
 98		}
 99	} else if fileName == "/gemlog/atom.xml" {
100		_, err := os.Stat(fullPath)
101		if err != nil {
102			w.SetMediaType("application/atom+xml")
103			feed := generateFeedFromUser(userName)
104			atomString := feed.toAtomFeed()
105			io.Copy(w, strings.NewReader(atomString))
106			return
107		}
108	}
109
110	gmi.ServeFile(w, gmi.Dir(path.Join(c.FilesDirectory, userName)), fileName)
111}
112
113func runGeminiServer() {
114	log.Println("Starting gemini server")
115	var err error
116	gt, err = template.ParseGlob(path.Join(c.TemplatesDirectory, "*.gmi"))
117	if err != nil {
118		log.Fatal(err)
119	}
120	var server gmi.Server
121	server.ReadTimeout = 1 * time.Minute
122	server.WriteTimeout = 2 * time.Minute
123
124	hostname := strings.SplitN(c.Host, ":", 2)[0]
125	// is this necc?
126	err = server.Certificates.Load(c.GeminiCertStore)
127	if err != nil {
128	}
129	server.CreateCertificate = func(h string) (tls.Certificate, error) {
130		log.Println("Generating certificate for", h)
131		return gmi.CreateCertificate(gmi.CertificateOptions{
132			Subject: pkix.Name{
133				CommonName: hostname,
134			},
135			DNSNames: []string{h},
136			Duration: time.Hour * 760, // one month
137		})
138	}
139
140	var mux gmi.ServeMux
141	// replace with wildcard cert
142	mux.HandleFunc("/", gmiIndex)
143
144	var wildcardMux gmi.ServeMux
145	wildcardMux.HandleFunc("/", gmiPage)
146	server.Register(hostname, &mux)
147	server.Register("*."+hostname, &wildcardMux)
148
149	err = server.ListenAndServe()
150	if err != nil {
151		log.Fatal(err)
152	}
153}