// // Copyright (c) 2019 Ted Unangst // // Permission to use, copy, modify, and distribute this software for any // purpose with or without fee is hereby granted, provided that the above // copyright notice and this permission notice appear in all copies. // // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. package main import ( "crypto/rand" "crypto/rsa" "fmt" "html" "html/template" "log" "net/http" "regexp" "strings" "sync" "humungus.tedunangst.com/r/webs/htfilter" ) func reverbolate(honks []*Honk) { filt := htfilter.New() for _, h := range honks { h.What += "ed" if h.Whofore == 2 { h.URL = h.XID h.Noise = mentionize(h.Noise) } else { idx := strings.LastIndexByte(h.Honker, '/') if idx != -1 { h.Username = honkerhandle(h.Honker) } else { h.Username = h.Honker } if h.URL == "" { h.URL = h.XID } } zap := make(map[*Donk]bool) h.Noise = unpucker(h.Noise) precis := h.Precis if precis != "" { precis = "

summary: " + precis + "

" } h.HTML, _ = filt.String(precis + h.Noise) emuxifier := func(e string) string { for _, d := range h.Donks { if d.Name == e { zap[d] = true return fmt.Sprintf(``, d.Name, d.XID) } } return e } h.HTML = template.HTML(re_emus.ReplaceAllStringFunc(string(h.HTML), emuxifier)) j := 0 for i := 0; i < len(h.Donks); i++ { if !zap[h.Donks[i]] { h.Donks[j] = h.Donks[i] j++ } } h.Donks = h.Donks[:j] } } func shortxid(xid string) string { idx := strings.LastIndexByte(xid, '/') if idx == -1 { return xid } return xid[idx+1:] } func xfiltrate() string { letters := "BCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz1234567891234567891234" for { var b [18]byte rand.Read(b[:]) for i, c := range b { b[i] = letters[c&63] } s := string(b[:]) return s } } type Mention struct { who string where string } var re_mentions = regexp.MustCompile(`@[[:alnum:]._-]+@[[:alnum:].-]+`) var re_urltions = regexp.MustCompile(`@https://\S+`) func grapevine(s string) []string { var mentions []string m := re_mentions.FindAllString(s, -1) for i := range m { where := gofish(m[i]) if where != "" { mentions = append(mentions, where) } } m = re_urltions.FindAllString(s, -1) for i := range m { mentions = append(mentions, m[i][1:]) } return mentions } func bunchofgrapes(s string) []Mention { m := re_mentions.FindAllString(s, -1) var mentions []Mention for i := range m { where := gofish(m[i]) if where != "" { mentions = append(mentions, Mention{who: m[i], where: where}) } } m = re_urltions.FindAllString(s, -1) for i := range m { mentions = append(mentions, Mention{who: m[i][1:], where: m[i][1:]}) } return mentions } type Emu struct { ID string Name string } var re_link = regexp.MustCompile(`@?https?://[^\s"]+[\w/)]`) var re_emus = regexp.MustCompile(`:[[:alnum:]_]+:`) func herdofemus(noise string) []Emu { m := re_emus.FindAllString(noise, -1) m = oneofakind(m) var emus []Emu for _, e := range m { fname := e[1 : len(e)-1] url := fmt.Sprintf("https://%s/emu/%s.png", serverName, fname) emus = append(emus, Emu{ID: url, Name: e}) } return emus } var re_bolder = regexp.MustCompile(`(^|\W)\*\*([\w\s,.!?'-]+)\*\*($|\W)`) var re_italicer = regexp.MustCompile(`(^|\W)\*([\w\s,.!?'-]+)\*($|\W)`) var re_bigcoder = regexp.MustCompile("```\n?((?s:.*?))\n?```") var re_coder = regexp.MustCompile("`([^`]*)`") var re_quoter = regexp.MustCompile(`(?m:^> (.*)\n)`) func markitzero(s string) string { var bigcodes []string bigsaver := func(code string) string { bigcodes = append(bigcodes, code) return "``````" } s = re_bigcoder.ReplaceAllStringFunc(s, bigsaver) var lilcodes []string lilsaver := func(code string) string { lilcodes = append(lilcodes, code) return "`x`" } s = re_coder.ReplaceAllStringFunc(s, lilsaver) s = re_bolder.ReplaceAllString(s, "$1$2$3") s = re_italicer.ReplaceAllString(s, "$1$2$3") s = re_quoter.ReplaceAllString(s, "

$1
") lilun := func(s string) string { code := lilcodes[0] lilcodes = lilcodes[1:] return code } s = re_coder.ReplaceAllStringFunc(s, lilun) bigun := func(s string) string { code := bigcodes[0] bigcodes = bigcodes[1:] return code } s = re_bigcoder.ReplaceAllStringFunc(s, bigun) s = re_bigcoder.ReplaceAllString(s, "
$1
") s = re_coder.ReplaceAllString(s, "$1") return s } func obfusbreak(s string) string { s = strings.TrimSpace(s) s = strings.Replace(s, "\r", "", -1) s = html.EscapeString(s) // dammit go s = strings.Replace(s, "'", "'", -1) linkfn := func(url string) string { if url[0] == '@' { return url } addparen := false adddot := false if strings.HasSuffix(url, ")") && strings.IndexByte(url, '(') == -1 { url = url[:len(url)-1] addparen = true } if strings.HasSuffix(url, ".") { url = url[:len(url)-1] adddot = true } url = fmt.Sprintf(`%s`, url, url) if adddot { url += "." } if addparen { url += ")" } return url } s = re_link.ReplaceAllStringFunc(s, linkfn) s = markitzero(s) s = strings.Replace(s, "\n", "
", -1) return s } func mentionize(s string) string { s = re_mentions.ReplaceAllStringFunc(s, func(m string) string { where := gofish(m) if where == "" { return m } who := m[0 : 1+strings.IndexByte(m[1:], '@')] return fmt.Sprintf(`%s`, html.EscapeString(where), html.EscapeString(who)) }) s = re_urltions.ReplaceAllStringFunc(s, func(m string) string { return fmt.Sprintf(`%s`, html.EscapeString(m[1:]), html.EscapeString(m)) }) return s } var re_unurl = regexp.MustCompile("https://([^/]+).*/([^/]+)") func originate(u string) string { m := re_unurl.FindStringSubmatch(u) if len(m) > 2 { return m[1] } return "" } func honkerhandle(h string) string { m := re_unurl.FindStringSubmatch(h) if len(m) > 2 { return fmt.Sprintf("%s@%s", m[2], m[1]) } return h } func prepend(s string, x []string) []string { return append([]string{s}, x...) } // pleroma leaks followers addressed posts to followers func butnottooloud(aud []string) { for i, a := range aud { if strings.HasSuffix(a, "/followers") { aud[i] = "" } } } func oneofakind(a []string) []string { var x []string for n, s := range a { if s != "" { x = append(x, s) for i := n + 1; i < len(a); i++ { if a[i] == s { a[i] = "" } } } } return x } var ziggies = make(map[string]*rsa.PrivateKey) var zaggies = make(map[string]*rsa.PublicKey) var ziggylock sync.Mutex func ziggy(username string) (keyname string, key *rsa.PrivateKey) { ziggylock.Lock() key = ziggies[username] ziggylock.Unlock() if key == nil { db := opendatabase() row := db.QueryRow("select seckey from users where username = ?", username) var data string row.Scan(&data) var err error key, _, err = pez(data) if err != nil { log.Printf("error decoding %s seckey: %s", username, err) return } ziggylock.Lock() ziggies[username] = key ziggylock.Unlock() } keyname = fmt.Sprintf("https://%s/u/%s#key", serverName, username) return } func zaggy(keyname string) (key *rsa.PublicKey) { ziggylock.Lock() key = zaggies[keyname] ziggylock.Unlock() if key != nil { return } db := opendatabase() row := db.QueryRow("select pubkey from xonkers where xid = ?", keyname) var data string err := row.Scan(&data) if err != nil { log.Printf("hitting the webs for missing pubkey: %s", keyname) j, err := GetJunk(keyname) if err != nil { log.Printf("error getting %s pubkey: %s", keyname, err) return } var ok bool data, ok = jsonfindstring(j, []string{"publicKey", "publicKeyPem"}) if !ok { log.Printf("error finding %s pubkey", keyname) return } _, ok = jsonfindstring(j, []string{"publicKey", "owner"}) if !ok { log.Printf("error finding %s pubkey owner", keyname) return } _, key, err = pez(data) if err != nil { log.Printf("error decoding %s pubkey: %s", keyname, err) return } _, err = stmtSaveBoxes.Exec(keyname, "", "", "", data) if err != nil { log.Printf("error saving key: %s", err) } } else { _, key, err = pez(data) if err != nil { log.Printf("error decoding %s pubkey: %s", keyname, err) return } } ziggylock.Lock() zaggies[keyname] = key ziggylock.Unlock() return } func makeitworksomehowwithoutregardforkeycontinuity(keyname string, r *http.Request, payload []byte) (string, error) { db := opendatabase() _, err := db.Exec("delete from xonkers where xid = ?", keyname) if err != nil { log.Printf("error deleting key: %s", err) } ziggylock.Lock() delete(zaggies, keyname) ziggylock.Unlock() return zag(r, payload) } var thumbbiters map[int64]map[string]bool var thumblock sync.Mutex func bitethethumbs() { rows, err := stmtThumbBiters.Query() if err != nil { log.Printf("error getting thumbbiters: %s", err) return } defer rows.Close() thumblock.Lock() defer thumblock.Unlock() thumbbiters = make(map[int64]map[string]bool) for rows.Next() { var userid int64 var name, wherefore string err = rows.Scan(&userid, &name, &wherefore) if err != nil { log.Printf("error scanning zonker: %s", err) continue } m := thumbbiters[userid] if m == nil { m = make(map[string]bool) thumbbiters[userid] = m } m[name] = true } } func thoudostbitethythumb(userid int64, who []string, objid string) bool { thumblock.Lock() biters := thumbbiters[userid] thumblock.Unlock() for _, w := range who { if biters[w] { return true } m := re_unurl.FindStringSubmatch(w) if len(m) > 2 { where := m[1] if biters[where] { return true } } } return false } func keymatch(keyname string, actor string) string { hash := strings.IndexByte(keyname, '#') if hash == -1 { hash = len(keyname) } owner := keyname[0:hash] if owner == actor { return originate(actor) } return "" }