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	"net"
 12	"os"
 13	"path"
 14	"path/filepath"
 15	"strings"
 16	"text/template"
 17	"time"
 18)
 19
 20var gt *template.Template
 21
 22func generateGemfeedPage(user string) string {
 23	feed := generateFeedFromUser(user)
 24	data := struct {
 25		Host        string
 26		Title       string
 27		FeedEntries []FeedEntry
 28	}{c.Host, feed.Title, feed.Entries}
 29	var buff bytes.Buffer
 30	gt.ExecuteTemplate(&buff, "gemfeed.gmi", data)
 31	return buff.String()
 32}
 33
 34func generateFolderPage(fullpath string) string {
 35	files, _ := ioutil.ReadDir(fullpath)
 36	var renderedFiles = []File{}
 37	for _, file := range files {
 38		// Very awkward
 39		res := fileFromPath(path.Join(fullpath, file.Name()))
 40		renderedFiles = append(renderedFiles, res)
 41	}
 42	var buff bytes.Buffer
 43	data := struct {
 44		Host   string
 45		Folder string
 46		Files  []File
 47	}{c.Host, getLocalPath(fullpath), renderedFiles}
 48	err := gt.ExecuteTemplate(&buff, "folder.gmi", data)
 49	if err != nil {
 50		log.Println(err)
 51		return ""
 52	}
 53	return buff.String()
 54}
 55
 56func gmiIndex(w *gmi.ResponseWriter, r *gmi.Request) {
 57	logGemini(r) // TODO move into wrapper
 58	t, err := template.ParseFiles("templates/index.gmi")
 59	if err != nil {
 60		log.Fatal(err)
 61	}
 62	files, err := getIndexFiles(false)
 63	users, err := getActiveUserNames()
 64	if err != nil {
 65		log.Println(err)
 66		w.WriteHeader(40, "Internal server error")
 67	}
 68	data := struct {
 69		Host      string
 70		SiteTitle string
 71		Files     []*File
 72		Users     []string
 73	}{
 74		Host:      c.Host,
 75		SiteTitle: c.SiteTitle,
 76		Files:     files,
 77		Users:     users,
 78	}
 79	t.Execute(w, data)
 80}
 81
 82func gmiPage(w *gmi.ResponseWriter, r *gmi.Request) {
 83	logGemini(r) // TODO move into wrapper
 84	var userName string
 85	custom := domains[r.URL.Host]
 86	if custom != "" {
 87		userName = custom
 88	} else {
 89		userName = filepath.Clean(strings.Split(r.URL.Host, ".")[0]) // clean probably unnecessary
 90	}
 91	fileName := filepath.Clean(r.URL.Path)
 92	if fileName == "/" {
 93		fileName = "index.gmi"
 94	} else if strings.HasPrefix(fileName, "/"+HiddenFolder) {
 95		w.WriteStatus(gmi.StatusNotFound)
 96		return
 97	}
 98	fullPath := path.Join(c.FilesDirectory, userName, fileName)
 99	if fileName == "/gemlog" { // temp hack
100		_, err := os.Stat(path.Join(fullPath, "index.gmi"))
101		if err != nil {
102			w.SetMediaType("text/gemini")
103			io.Copy(w, strings.NewReader(generateGemfeedPage(userName)))
104			return
105		}
106	} else if fileName == "/gemlog/atom.xml" {
107		_, err := os.Stat(fullPath)
108		if err != nil {
109			w.SetMediaType("application/atom+xml")
110			feed := generateFeedFromUser(userName)
111			atomString := feed.toAtomFeed()
112			io.Copy(w, strings.NewReader(atomString))
113			return
114		}
115	}
116
117	gmi.ServeFile(w, gmi.Dir(path.Join(c.FilesDirectory, userName)), fileName)
118}
119
120func runGeminiServer() {
121	log.Println("Starting gemini server")
122	var err error
123	gt, err = template.ParseGlob(path.Join(c.TemplatesDirectory, "*.gmi"))
124	if err != nil {
125		log.Fatal(err)
126	}
127	var server gmi.Server
128	server.ReadTimeout = 1 * time.Minute
129	server.WriteTimeout = 2 * time.Minute
130
131	hostname := strings.SplitN(c.Host, ":", 2)[0]
132	// is this necc?
133	err = server.Certificates.Load(c.GeminiCertStore)
134	if err != nil {
135	}
136	server.CreateCertificate = func(h string) (tls.Certificate, error) {
137		log.Println("Generating certificate for", h)
138		return gmi.CreateCertificate(gmi.CertificateOptions{
139			Subject: pkix.Name{
140				CommonName: h,
141			},
142			DNSNames: []string{h},
143			Duration: time.Hour * 8760 * 100, // 100 years
144		})
145	}
146
147	var mux gmi.ServeMux
148	// replace with wildcard cert
149	mux.HandleFunc("/", gmiIndex)
150
151	var wildcardMux gmi.ServeMux
152	wildcardMux.HandleFunc("/", gmiPage)
153	server.Register(hostname, &mux)
154	server.Register("*."+hostname, &wildcardMux)
155	for k, _ := range domains { // TODO fix
156		server.Register(k, &wildcardMux)
157	}
158
159	err = server.ListenAndServe()
160	if err != nil {
161		log.Fatal(err)
162	}
163}