603 lines
14 KiB
Go
603 lines
14 KiB
Go
//
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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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"fmt"
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"html"
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"html/template"
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"log"
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"net/http"
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"os"
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"regexp"
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"strings"
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"sync"
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"humungus.tedunangst.com/r/webs/htfilter"
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"humungus.tedunangst.com/r/webs/httpsig"
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)
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func reverbolate(userid int64, honks []*Honk) {
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filt := htfilter.New()
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zilences := getzilences(userid)
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for _, h := range honks {
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h.What += "ed"
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if h.What == "tonked" {
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h.What = "honked back"
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h.Style = "subtle"
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}
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if !h.Public {
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h.Style += " limited"
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}
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if h.Whofore == 2 || h.Whofore == 3 {
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h.URL = h.XID
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if h.What != "bonked" {
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h.Noise = mentionize(h.Noise)
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}
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h.Username, h.Handle = honkerhandle(h.Honker)
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} else {
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_, h.Handle = honkerhandle(h.Honker)
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h.Username = h.Handle
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if len(h.Username) > 20 {
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h.Username = h.Username[:20] + ".."
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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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if h.Oonker != "" {
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_, h.Oondle = honkerhandle(h.Oonker)
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}
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zap := make(map[*Donk]bool)
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h.Noise = unpucker(h.Noise)
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h.Open = "open"
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if badword := unsee(zilences, h.Precis, h.Noise); badword != "" {
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if h.Precis == "" {
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h.Precis = badword
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}
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h.Open = ""
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} else if h.Precis == "unspecified horror" {
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h.Precis = ""
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}
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h.HTML, _ = filt.String(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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if d.Local {
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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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}
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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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j := 0
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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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h.Donks[j] = h.Donks[i]
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j++
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}
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}
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h.Donks = h.Donks[:j]
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}
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}
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func unsee(zilences []*regexp.Regexp, precis string, noise string) string {
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for _, z := range zilences {
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if z.MatchString(precis) || z.MatchString(noise) {
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if precis == "" {
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w := z.String()
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return w[6 : len(w)-3]
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}
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return precis
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}
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}
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return ""
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}
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func osmosis(honks []*Honk, userid int64) []*Honk {
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zords := getzords(userid)
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j := 0
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outer:
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for _, h := range honks {
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for _, z := range zords {
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if z.MatchString(h.Precis) || z.MatchString(h.Noise) {
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continue outer
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}
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}
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honks[j] = h
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j++
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}
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honks = honks[0:j]
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return honks
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}
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func shortxid(xid string) string {
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idx := strings.LastIndexByte(xid, '/')
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if idx == -1 {
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return xid
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}
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return xid[idx+1:]
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}
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func xfiltrate() string {
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letters := "BCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz1234567891234567891234"
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var b [18]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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return s
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}
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var re_hashes = regexp.MustCompile(`(?:^|\W)#[[:alnum:]]+`)
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func ontologies(s string) []string {
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m := re_hashes.FindAllString(s, -1)
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j := 0
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for _, h := range m {
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if h[0] == '&' {
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continue
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}
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if h[0] != '#' {
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h = h[1:]
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}
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m[j] = h
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j++
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}
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return m[:j]
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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:].-]*[[:alnum:]]`)
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var re_urltions = regexp.MustCompile(`@https://\S+`)
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func grapevine(s string) []string {
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var mentions []string
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m := re_mentions.FindAllString(s, -1)
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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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m = re_urltions.FindAllString(s, -1)
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for i := range m {
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mentions = append(mentions, m[i][1:])
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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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m = re_urltions.FindAllString(s, -1)
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for i := range m {
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mentions = append(mentions, Mention{who: m[i][1:], where: m[i][1:]})
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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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_, err := os.Stat("emus/" + fname + ".png")
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if err != nil {
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continue
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}
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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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var re_memes = regexp.MustCompile("meme: ?([[:alnum:]_.-]+)")
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func memetize(honk *Honk) {
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repl := func(x string) string {
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name := x[5:]
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if name[0] == ' ' {
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name = name[1:]
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}
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fd, err := os.Open("memes/" + name)
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if err != nil {
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log.Printf("no meme for %s", name)
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return x
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}
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var peek [512]byte
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n, _ := fd.Read(peek[:])
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ct := http.DetectContentType(peek[:n])
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fd.Close()
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url := fmt.Sprintf("https://%s/meme/%s", serverName, name)
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res, err := stmtSaveFile.Exec("", name, url, ct, 0, "")
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if err != nil {
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log.Printf("error saving meme: %s", err)
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return x
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}
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var d Donk
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d.FileID, _ = res.LastInsertId()
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d.XID = ""
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d.Name = name
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d.Media = ct
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d.URL = url
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d.Local = false
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honk.Donks = append(honk.Donks, &d)
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return ""
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}
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honk.Noise = re_memes.ReplaceAllStringFunc(honk.Noise, repl)
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}
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var re_bolder = regexp.MustCompile(`(^|\W)\*\*([\w\s,.!?'-]+)\*\*($|\W)`)
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var re_italicer = regexp.MustCompile(`(^|\W)\*([\w\s,.!?'-]+)\*($|\W)`)
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var re_bigcoder = regexp.MustCompile("```\n?((?s:.*?))\n?```\n?")
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var re_coder = regexp.MustCompile("`([^`]*)`")
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var re_quoter = regexp.MustCompile(`(?m:^> (.*)\n?)`)
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func markitzero(s string) string {
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var bigcodes []string
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bigsaver := func(code string) string {
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bigcodes = append(bigcodes, code)
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return "``````"
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}
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s = re_bigcoder.ReplaceAllStringFunc(s, bigsaver)
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var lilcodes []string
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lilsaver := func(code string) string {
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lilcodes = append(lilcodes, code)
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return "`x`"
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}
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s = re_coder.ReplaceAllStringFunc(s, lilsaver)
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s = re_bolder.ReplaceAllString(s, "$1<b>$2</b>$3")
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s = re_italicer.ReplaceAllString(s, "$1<i>$2</i>$3")
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s = re_quoter.ReplaceAllString(s, "<blockquote>$1</blockquote><p>")
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lilun := func(s string) string {
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code := lilcodes[0]
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lilcodes = lilcodes[1:]
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return code
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}
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s = re_coder.ReplaceAllStringFunc(s, lilun)
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bigun := func(s string) string {
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code := bigcodes[0]
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bigcodes = bigcodes[1:]
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return code
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}
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s = re_bigcoder.ReplaceAllStringFunc(s, bigun)
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s = re_bigcoder.ReplaceAllString(s, "<pre><code>$1</code></pre><p>")
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s = re_coder.ReplaceAllString(s, "<code>$1</code>")
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return s
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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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// dammit go
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s = strings.Replace(s, "'", "'", -1)
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linkfn := func(url string) string {
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if url[0] == '@' {
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return url
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}
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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 class="mention u-url" 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 = markitzero(s)
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s = strings.Replace(s, "\n", "<br>", -1)
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return s
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}
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func mentionize(s string) string {
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s = re_mentions.ReplaceAllStringFunc(s, func(m string) string {
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where := gofish(m)
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if where == "" {
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return m
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}
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who := m[0 : 1+strings.IndexByte(m[1:], '@')]
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return fmt.Sprintf(`<span class="h-card"><a class="u-url mention" href="%s">%s</a></span>`,
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html.EscapeString(where), html.EscapeString(who))
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})
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s = re_urltions.ReplaceAllStringFunc(s, func(m string) string {
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return fmt.Sprintf(`<span class="h-card"><a class="u-url mention" href="%s">%s</a></span>`,
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html.EscapeString(m[1:]), 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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var re_urlhost = regexp.MustCompile("https://([^/]+)")
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func originate(u string) string {
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m := re_urlhost.FindStringSubmatch(u)
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if len(m) > 1 {
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return m[1]
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}
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return ""
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}
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func honkerhandle(h string) (string, string) {
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m := re_unurl.FindStringSubmatch(h)
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if len(m) > 2 {
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return m[2], fmt.Sprintf("%s@%s", m[2], m[1])
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}
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return h, 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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// pleroma leaks followers addressed posts to followers
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func butnottooloud(aud []string) {
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for i, a := range aud {
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if strings.HasSuffix(a, "/followers") {
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aud[i] = ""
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}
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}
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}
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func keepitquiet(aud []string) bool {
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for _, a := range aud {
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if a == thewholeworld {
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return false
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}
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}
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return true
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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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var ziggies = make(map[string]*rsa.PrivateKey)
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var zaggies = make(map[string]*rsa.PublicKey)
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var ziggylock sync.Mutex
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func ziggy(username string) (keyname string, key *rsa.PrivateKey) {
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ziggylock.Lock()
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key = ziggies[username]
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ziggylock.Unlock()
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if key == nil {
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db := opendatabase()
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row := db.QueryRow("select seckey from users where username = ?", username)
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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 = httpsig.DecodeKey(data)
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if err != nil {
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log.Printf("error decoding %s seckey: %s", username, err)
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return
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}
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ziggylock.Lock()
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ziggies[username] = key
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ziggylock.Unlock()
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}
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keyname = fmt.Sprintf("https://%s/%s/%s#key", serverName, userSep, username)
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return
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}
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func zaggy(keyname string) (key *rsa.PublicKey) {
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ziggylock.Lock()
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key = zaggies[keyname]
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ziggylock.Unlock()
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if key != nil {
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return
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}
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row := stmtGetXonker.QueryRow(keyname, "pubkey")
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var data string
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err := row.Scan(&data)
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if err != nil {
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log.Printf("hitting the webs for missing pubkey: %s", keyname)
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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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keyobj, ok := j.GetMap("publicKey")
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if ok {
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j = keyobj
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}
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data, ok = j.GetString("publicKeyPem")
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if !ok {
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log.Printf("error finding %s pubkey", keyname)
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return
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}
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_, ok = j.GetString("owner")
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if !ok {
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log.Printf("error finding %s pubkey owner", keyname)
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return
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}
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_, key, err = httpsig.DecodeKey(data)
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if err != nil {
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log.Printf("error decoding %s pubkey: %s", keyname, err)
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return
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}
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_, err = stmtSaveXonker.Exec(keyname, data, "pubkey")
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if err != nil {
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log.Printf("error saving key: %s", err)
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}
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} else {
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_, key, err = httpsig.DecodeKey(data)
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if err != nil {
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log.Printf("error decoding %s pubkey: %s", keyname, err)
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return
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}
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}
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ziggylock.Lock()
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zaggies[keyname] = key
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ziggylock.Unlock()
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return
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}
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|
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func makeitworksomehowwithoutregardforkeycontinuity(keyname string, r *http.Request, payload []byte) (string, error) {
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_, err := stmtDeleteXonker.Exec(keyname, "pubkey")
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if err != nil {
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log.Printf("error deleting key: %s", err)
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}
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ziggylock.Lock()
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delete(zaggies, keyname)
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ziggylock.Unlock()
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return httpsig.VerifyRequest(r, payload, zaggy)
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}
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|
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var thumbbiters map[int64]map[string]bool
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var zordses map[int64][]*regexp.Regexp
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var zilences map[int64][]*regexp.Regexp
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var thumblock sync.Mutex
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|
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func bitethethumbs() {
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rows, err := stmtThumbBiters.Query()
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if err != nil {
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log.Printf("error getting thumbbiters: %s", err)
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return
|
|
}
|
|
defer rows.Close()
|
|
|
|
thumblock.Lock()
|
|
defer thumblock.Unlock()
|
|
thumbbiters = make(map[int64]map[string]bool)
|
|
zordses = make(map[int64][]*regexp.Regexp)
|
|
zilences = make(map[int64][]*regexp.Regexp)
|
|
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
|
|
}
|
|
if wherefore == "zord" || wherefore == "zilence" {
|
|
zord := "\\b(?i:" + name + ")\\b"
|
|
re, err := regexp.Compile(zord)
|
|
if err != nil {
|
|
log.Printf("error compiling zord: %s", err)
|
|
} else {
|
|
if wherefore == "zord" {
|
|
zordses[userid] = append(zordses[userid], re)
|
|
} else {
|
|
zilences[userid] = append(zilences[userid], re)
|
|
}
|
|
}
|
|
continue
|
|
}
|
|
m := thumbbiters[userid]
|
|
if m == nil {
|
|
m = make(map[string]bool)
|
|
thumbbiters[userid] = m
|
|
}
|
|
m[name] = true
|
|
}
|
|
}
|
|
|
|
func getzords(userid int64) []*regexp.Regexp {
|
|
thumblock.Lock()
|
|
defer thumblock.Unlock()
|
|
return zordses[userid]
|
|
}
|
|
|
|
func getzilences(userid int64) []*regexp.Regexp {
|
|
thumblock.Lock()
|
|
defer thumblock.Unlock()
|
|
return zilences[userid]
|
|
}
|
|
|
|
func thoudostbitethythumb(userid int64, who []string, objid string) bool {
|
|
thumblock.Lock()
|
|
biters := thumbbiters[userid]
|
|
thumblock.Unlock()
|
|
objwhere := originate(objid)
|
|
if objwhere != "" && biters[objwhere] {
|
|
return true
|
|
}
|
|
for _, w := range who {
|
|
if biters[w] {
|
|
return true
|
|
}
|
|
where := originate(w)
|
|
if where != "" {
|
|
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 ""
|
|
}
|