Ted Unangst
5 years ago
parent
df1f73f45e
commit
c163c74499
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//
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// Copyright (c) 2019 Ted Unangst <tedu@tedunangst.com>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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package main
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import (
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"crypto/rand"
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"crypto/rsa"
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"database/sql"
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"fmt"
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"html"
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"html/template"
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"log"
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"regexp"
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"strings"
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)
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func reverbolate(honks []*Honk) {
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for _, h := range honks {
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h.What += "ed"
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if h.Honker == "" {
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h.Honker = "https://" + serverName + "/u/" + h.Username
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if strings.IndexByte(h.XID, '/') == -1 {
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h.URL = h.Honker + "/h/" + h.XID
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} else {
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h.URL = h.XID
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}
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} else {
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idx := strings.LastIndexByte(h.Honker, '/')
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if idx != -1 {
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h.Username = honkerhandle(h.Honker)
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} else {
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h.Username = h.Honker
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}
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if h.URL == "" {
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h.URL = h.XID
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}
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}
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zap := make(map[*Donk]bool)
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h.HTML = cleanstring(h.Noise)
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emuxifier := func(e string) string {
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for _, d := range h.Donks {
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if d.Name == e {
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zap[d] = true
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return fmt.Sprintf(`<img class="emu" title="%s" src="/d/%s">`, d.Name, d.XID)
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}
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}
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return e
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}
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h.HTML = template.HTML(re_emus.ReplaceAllStringFunc(string(h.HTML), emuxifier))
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for i := 0; i < len(h.Donks); i++ {
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if zap[h.Donks[i]] {
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copy(h.Donks[i:], h.Donks[i+1:])
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h.Donks = h.Donks[:len(h.Donks)-1]
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i--
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}
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}
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}
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}
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func xfiltrate() string {
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letters := "BCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz1234567891234567891234"
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db := opendatabase()
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for {
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var x int64
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var b [16]byte
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rand.Read(b[:])
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for i, c := range b {
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b[i] = letters[c&63]
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}
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s := string(b[:])
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r := db.QueryRow("select honkid from honks where xid = ?", s)
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err := r.Scan(&x)
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if err == nil {
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continue
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}
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if err != sql.ErrNoRows {
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log.Printf("err picking xid: %s", err)
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return ""
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}
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r = db.QueryRow("select fileid from files where name = ?", s)
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err = r.Scan(&x)
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if err == nil {
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continue
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}
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if err != sql.ErrNoRows {
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log.Printf("err picking xid: %s", err)
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return ""
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}
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return s
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}
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}
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type Mention struct {
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who string
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where string
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}
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var re_mentions = regexp.MustCompile(`@[[:alnum:]]+@[[:alnum:].]+`)
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func grapevine(s string) []string {
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m := re_mentions.FindAllString(s, -1)
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var mentions []string
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for i := range m {
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where := gofish(m[i])
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if where != "" {
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mentions = append(mentions, where)
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}
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}
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return mentions
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}
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func bunchofgrapes(s string) []Mention {
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m := re_mentions.FindAllString(s, -1)
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var mentions []Mention
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for i := range m {
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where := gofish(m[i])
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if where != "" {
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mentions = append(mentions, Mention{who: m[i], where: where})
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}
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}
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return mentions
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}
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type Emu struct {
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ID string
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Name string
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}
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var re_link = regexp.MustCompile(`https?://[^\s"]+[\w/)]`)
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var re_emus = regexp.MustCompile(`:[[:alnum:]_]+:`)
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func herdofemus(noise string) []Emu {
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m := re_emus.FindAllString(noise, -1)
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m = oneofakind(m)
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var emus []Emu
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for _, e := range m {
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fname := e[1 : len(e)-1]
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url := fmt.Sprintf("https://%s/emu/%s.png", serverName, fname)
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emus = append(emus, Emu{ID: url, Name: e})
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}
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return emus
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}
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func obfusbreak(s string) string {
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s = strings.TrimSpace(s)
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s = strings.Replace(s, "\r", "", -1)
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s = html.EscapeString(s)
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linkfn := func(url string) string {
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addparen := false
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adddot := false
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if strings.HasSuffix(url, ")") && strings.IndexByte(url, '(') == -1 {
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url = url[:len(url)-1]
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addparen = true
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}
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if strings.HasSuffix(url, ".") {
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url = url[:len(url)-1]
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adddot = true
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}
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url = fmt.Sprintf(`<a href="%s">%s</a>`, url, url)
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if adddot {
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url += "."
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}
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if addparen {
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url += ")"
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}
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return url
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}
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s = re_link.ReplaceAllStringFunc(s, linkfn)
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s = strings.Replace(s, "\n", "<br>", -1)
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s = re_mentions.ReplaceAllStringFunc(s, func(m string) string {
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return fmt.Sprintf(`<a href="%s">%s</a>`, html.EscapeString(gofish(m)),
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html.EscapeString(m))
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})
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return s
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}
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var re_unurl = regexp.MustCompile("https://([^/]+).*/([^/]+)")
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func honkerhandle(h string) string {
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m := re_unurl.FindStringSubmatch(h)
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if len(m) > 2 {
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return fmt.Sprintf("%s@%s", m[2], m[1])
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}
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return h
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}
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func prepend(s string, x []string) []string {
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return append([]string{s}, x...)
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}
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func oneofakind(a []string) []string {
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var x []string
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for n, s := range a {
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if s != "" {
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x = append(x, s)
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for i := n + 1; i < len(a); i++ {
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if a[i] == s {
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a[i] = ""
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}
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}
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}
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}
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return x
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}
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func ziggy(user *WhatAbout) (keyname string, key *rsa.PrivateKey) {
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db := opendatabase()
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row := db.QueryRow("select seckey from users where userid = ?", user.ID)
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var data string
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row.Scan(&data)
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var err error
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key, _, err = pez(data)
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if err != nil {
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log.Printf("error loading %s seckey: %s", user.Name, err)
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}
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keyname = user.URL + "#key"
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return
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}
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func zaggy(keyname string) (key *rsa.PublicKey) {
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db := opendatabase()
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row := db.QueryRow("select pubkey from honkers where flavor = 'key' and xid = ?", keyname)
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var data string
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err := row.Scan(&data)
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savekey := false
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if err != nil {
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savekey = true
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j, err := GetJunk(keyname)
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if err != nil {
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log.Printf("error getting %s pubkey: %s", keyname, err)
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return
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}
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var ok bool
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data, ok = jsonfindstring(j, []string{"publicKey", "publicKeyPem"})
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if !ok {
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log.Printf("error getting %s pubkey", keyname)
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return
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}
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_, ok = jsonfindstring(j, []string{"publicKey", "owner"})
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if !ok {
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log.Printf("error getting %s pubkey owner", keyname)
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return
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}
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}
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_, key, err = pez(data)
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if err != nil {
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log.Printf("error getting %s pubkey: %s", keyname, err)
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return
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}
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if savekey {
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db.Exec("insert into honkers (name, xid, flavor, pubkey) values (?, ?, ?, ?)",
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"", keyname, "key", data)
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}
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return
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}
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func keymatch(keyname string, actor string) bool {
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return strings.HasPrefix(keyname, actor)
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}
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