1//
   2// Copyright (c) 2019 Ted Unangst <tedu@tedunangst.com>
   3//
   4// Permission to use, copy, modify, and distribute this software for any
   5// purpose with or without fee is hereby granted, provided that the above
   6// copyright notice and this permission notice appear in all copies.
   7//
   8// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15
  16package main
  17
  18import (
  19	"bytes"
  20	"crypto/sha512"
  21	"database/sql"
  22	"errors"
  23	"fmt"
  24	"html/template"
  25	"io"
  26	notrand "math/rand"
  27	"mime/multipart"
  28	"net"
  29	"net/http"
  30	"net/http/fcgi"
  31	"net/url"
  32	"os"
  33	"os/signal"
  34	"regexp"
  35	"runtime/pprof"
  36	"sort"
  37	"strconv"
  38	"strings"
  39	"sync"
  40	"syscall"
  41	"time"
  42	"unicode/utf8"
  43
  44	"github.com/gorilla/mux"
  45	"humungus.tedunangst.com/r/gonix"
  46	"humungus.tedunangst.com/r/webs/gencache"
  47	"humungus.tedunangst.com/r/webs/httpsig"
  48	"humungus.tedunangst.com/r/webs/junk"
  49	"humungus.tedunangst.com/r/webs/login"
  50	"humungus.tedunangst.com/r/webs/rss"
  51	"humungus.tedunangst.com/r/webs/templates"
  52)
  53
  54var readviews *templates.Template
  55
  56var userSep = "u"
  57var honkSep = "h"
  58
  59var develMode = false
  60
  61var allemus []Emu
  62
  63func getuserstyle(u *login.UserInfo) template.HTMLAttr {
  64	if u == nil {
  65		return ""
  66	}
  67	user, _ := butwhatabout(u.Username)
  68	class := template.HTMLAttr("")
  69	if user.Options.SkinnyCSS {
  70		class += `class="skinny"`
  71	}
  72	return class
  73}
  74
  75func getmaplink(u *login.UserInfo) string {
  76	if u == nil {
  77		return "osm"
  78	}
  79	user, _ := butwhatabout(u.Username)
  80	ml := user.Options.MapLink
  81	if ml == "" {
  82		ml = "osm"
  83	}
  84	return ml
  85}
  86
  87func getInfo(r *http.Request) map[string]interface{} {
  88	templinfo := make(map[string]interface{})
  89	templinfo["StyleParam"] = getassetparam(viewDir + "/views/style.css")
  90	templinfo["LocalStyleParam"] = getassetparam(dataDir + "/views/local.css")
  91	templinfo["JSParam"] = getassetparam(viewDir + "/views/honkpage.js")
  92	templinfo["MiscJSParam"] = getassetparam(viewDir + "/views/misc.js")
  93	templinfo["LocalJSParam"] = getassetparam(dataDir + "/views/local.js")
  94	templinfo["ServerName"] = serverName
  95	templinfo["IconName"] = iconName
  96	templinfo["UserSep"] = userSep
  97	if r == nil {
  98		return templinfo
  99	}
 100	if u := login.GetUserInfo(r); u != nil {
 101		templinfo["UserInfo"], _ = butwhatabout(u.Username)
 102		templinfo["UserStyle"] = getuserstyle(u)
 103		combos, _ := combocache.Get(u.UserID)
 104		templinfo["Combos"] = combos
 105	}
 106	return templinfo
 107}
 108
 109var oldnews = gencache.New(gencache.Options[string, []byte]{
 110	Fill: func(url string) ([]byte, bool) {
 111		templinfo := getInfo(nil)
 112		var honks []*Honk
 113		var userid int64 = -1
 114
 115		templinfo["ServerMessage"] = serverMsg
 116		switch url {
 117		case "/events":
 118			honks = geteventhonks(userid)
 119			templinfo["ServerMessage"] = "some recent and upcoming events"
 120		default:
 121			templinfo["ShowRSS"] = true
 122			honks = getpublichonks()
 123		}
 124		reverbolate(userid, honks)
 125		templinfo["Honks"] = honks
 126		templinfo["MapLink"] = getmaplink(nil)
 127		var buf bytes.Buffer
 128		err := readviews.Execute(&buf, "honkpage.html", templinfo)
 129		if err != nil {
 130			elog.Print(err)
 131		}
 132		return buf.Bytes(), true
 133
 134	},
 135	Duration: 1 * time.Minute,
 136})
 137
 138func lonelypage(w http.ResponseWriter, r *http.Request) {
 139	page, _ := oldnews.Get(r.URL.Path)
 140	if !develMode {
 141		w.Header().Set("Cache-Control", "max-age=60")
 142	}
 143	w.Write(page)
 144}
 145
 146func homepage(w http.ResponseWriter, r *http.Request) {
 147	u := login.GetUserInfo(r)
 148	if u == nil {
 149		lonelypage(w, r)
 150		return
 151	}
 152	templinfo := getInfo(r)
 153	var honks []*Honk
 154	var userid int64 = -1
 155
 156	templinfo["ServerMessage"] = serverMsg
 157	if u == nil || r.URL.Path == "/front" {
 158		switch r.URL.Path {
 159		case "/events":
 160			honks = geteventhonks(userid)
 161			templinfo["ServerMessage"] = "some recent and upcoming events"
 162		default:
 163			templinfo["ShowRSS"] = true
 164			honks = getpublichonks()
 165		}
 166	} else {
 167		userid = u.UserID
 168		switch r.URL.Path {
 169		case "/atme":
 170			templinfo["ServerMessage"] = "at me!"
 171			templinfo["PageName"] = "atme"
 172			honks = gethonksforme(userid, 0)
 173			honks = osmosis(honks, userid, false)
 174			menewnone(userid)
 175			templinfo["UserInfo"], _ = butwhatabout(u.Username)
 176		case "/longago":
 177			templinfo["ServerMessage"] = "long ago and far away!"
 178			templinfo["PageName"] = "longago"
 179			honks = gethonksfromlongago(userid, 0)
 180			honks = osmosis(honks, userid, false)
 181		case "/events":
 182			templinfo["ServerMessage"] = "some recent and upcoming events"
 183			templinfo["PageName"] = "events"
 184			honks = geteventhonks(userid)
 185			honks = osmosis(honks, userid, true)
 186		case "/first":
 187			templinfo["PageName"] = "first"
 188			honks = gethonksforuserfirstclass(userid, 0)
 189			honks = osmosis(honks, userid, true)
 190		case "/saved":
 191			templinfo["ServerMessage"] = "saved honks"
 192			templinfo["PageName"] = "saved"
 193			honks = getsavedhonks(userid, 0)
 194		default:
 195			templinfo["PageName"] = "home"
 196			honks = gethonksforuser(userid, 0)
 197			honks = osmosis(honks, userid, true)
 198		}
 199		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 200	}
 201
 202	honkpage(w, u, honks, templinfo)
 203}
 204
 205func showemus(w http.ResponseWriter, r *http.Request) {
 206	templinfo := getInfo(r)
 207	templinfo["Emus"] = allemus
 208	err := readviews.Execute(w, "emus.html", templinfo)
 209	if err != nil {
 210		elog.Print(err)
 211	}
 212}
 213
 214func showfunzone(w http.ResponseWriter, r *http.Request) {
 215	var emunames, memenames []string
 216	emuext := make(map[string]string)
 217	dir, err := os.Open(dataDir + "/emus")
 218	if err == nil {
 219		emunames, _ = dir.Readdirnames(0)
 220		dir.Close()
 221	}
 222	for i, e := range emunames {
 223		if len(e) > 4 {
 224			emunames[i] = e[:len(e)-4]
 225			emuext[emunames[i]] = e[len(e)-4:]
 226		}
 227	}
 228	dir, err = os.Open(dataDir + "/memes")
 229	if err == nil {
 230		memenames, _ = dir.Readdirnames(0)
 231		dir.Close()
 232	}
 233	sort.Strings(emunames)
 234	sort.Strings(memenames)
 235	templinfo := getInfo(r)
 236	templinfo["Emus"] = emunames
 237	templinfo["Emuext"] = emuext
 238	templinfo["Memes"] = memenames
 239	err = readviews.Execute(w, "funzone.html", templinfo)
 240	if err != nil {
 241		elog.Print(err)
 242	}
 243}
 244
 245func showrss(w http.ResponseWriter, r *http.Request) {
 246	name := mux.Vars(r)["name"]
 247
 248	var honks []*Honk
 249	if name != "" {
 250		honks = gethonksbyuser(name, false, 0)
 251	} else {
 252		honks = getpublichonks()
 253	}
 254	reverbolate(-1, honks)
 255
 256	home := serverURL("/")
 257	base := home
 258	if name != "" {
 259		home += "u/" + name
 260		name += " "
 261	}
 262	feed := rss.Feed{
 263		Title:       name + "honk",
 264		Link:        home,
 265		Description: name + "honk rss",
 266		Image: &rss.Image{
 267			URL:   base + "icon.png",
 268			Title: name + "honk rss",
 269			Link:  home,
 270		},
 271	}
 272	var modtime time.Time
 273	for _, honk := range honks {
 274		if !firstclass(honk) {
 275			continue
 276		}
 277		desc := string(honk.HTML)
 278		if t := honk.Time; t != nil {
 279			desc += fmt.Sprintf(`<p>Time: %s`, t.StartTime.Local().Format("03:04PM MST Mon Jan 02"))
 280			if t.Duration != 0 {
 281				desc += fmt.Sprintf(`<br>Duration: %s`, t.Duration)
 282			}
 283		}
 284		if p := honk.Place; p != nil {
 285			desc += string(templates.Sprintf(`<p>Location: <a href="%s">%s</a> %f %f`,
 286				p.Url, p.Name, p.Latitude, p.Longitude))
 287		}
 288		for _, d := range honk.Donks {
 289			desc += string(templates.Sprintf(`<p><a href="%s">Attachment: %s</a>`,
 290				d.URL, d.Desc))
 291			if strings.HasPrefix(d.Media, "image") {
 292				desc += string(templates.Sprintf(`<img src="%s">`, d.URL))
 293			}
 294		}
 295
 296		feed.Items = append(feed.Items, &rss.Item{
 297			Title:       fmt.Sprintf("%s %s %s", honk.Username, honk.What, honk.XID),
 298			Description: rss.CData{Data: desc},
 299			Link:        honk.URL,
 300			PubDate:     honk.Date.Format(time.RFC1123),
 301			Guid:        &rss.Guid{IsPermaLink: true, Value: honk.URL},
 302		})
 303		if honk.Date.After(modtime) {
 304			modtime = honk.Date
 305		}
 306	}
 307	if !develMode {
 308		w.Header().Set("Cache-Control", "max-age=300")
 309		w.Header().Set("Last-Modified", modtime.Format(http.TimeFormat))
 310	}
 311
 312	err := feed.Write(w)
 313	if err != nil {
 314		elog.Printf("error writing rss: %s", err)
 315	}
 316}
 317
 318func crappola(j junk.Junk) bool {
 319	t, _ := j.GetString("type")
 320	a, _ := j.GetString("actor")
 321	o, _ := j.GetString("object")
 322	if t == "Delete" && a == o {
 323		dlog.Printf("crappola from %s", a)
 324		return true
 325	}
 326	return false
 327}
 328
 329func ping(user *WhatAbout, who string) {
 330	if targ := fullname(who, user.ID); targ != "" {
 331		who = targ
 332	}
 333	if !strings.HasPrefix(who, "https://") {
 334		who = gofish(who)
 335	}
 336	if who == "" {
 337		ilog.Printf("nobody to ping!")
 338		return
 339	}
 340	box, ok := boxofboxes.Get(who)
 341	if !ok {
 342		ilog.Printf("no inbox to ping %s", who)
 343		return
 344	}
 345	ilog.Printf("sending ping to %s", box.In)
 346	j := junk.New()
 347	j["@context"] = itiswhatitis
 348	j["type"] = "Ping"
 349	j["id"] = user.URL + "/ping/" + xfiltrate()
 350	j["actor"] = user.URL
 351	j["to"] = who
 352	ki := ziggy(user.ID)
 353	if ki == nil {
 354		return
 355	}
 356	err := PostJunk(ki.keyname, ki.seckey, box.In, j)
 357	if err != nil {
 358		elog.Printf("can't send ping: %s", err)
 359		return
 360	}
 361	ilog.Printf("sent ping to %s: %s", who, j["id"])
 362}
 363
 364func pong(user *WhatAbout, who string, obj string) {
 365	box, ok := boxofboxes.Get(who)
 366	if !ok {
 367		ilog.Printf("no inbox to pong %s", who)
 368		return
 369	}
 370	j := junk.New()
 371	j["@context"] = itiswhatitis
 372	j["type"] = "Pong"
 373	j["id"] = user.URL + "/pong/" + xfiltrate()
 374	j["actor"] = user.URL
 375	j["to"] = who
 376	j["object"] = obj
 377	ki := ziggy(user.ID)
 378	if ki == nil {
 379		return
 380	}
 381	err := PostJunk(ki.keyname, ki.seckey, box.In, j)
 382	if err != nil {
 383		elog.Printf("can't send pong: %s", err)
 384		return
 385	}
 386}
 387
 388func inbox(w http.ResponseWriter, r *http.Request) {
 389	name := mux.Vars(r)["name"]
 390	user, err := butwhatabout(name)
 391	if err != nil {
 392		http.NotFound(w, r)
 393		return
 394	}
 395	if stealthmode(user.ID, r) {
 396		http.NotFound(w, r)
 397		return
 398	}
 399	var buf bytes.Buffer
 400	limiter := io.LimitReader(r.Body, 1*1024*1024)
 401	io.Copy(&buf, limiter)
 402	payload := buf.Bytes()
 403	j, err := junk.FromBytes(payload)
 404	if err != nil {
 405		ilog.Printf("bad payload: %s", err)
 406		ilog.Writer().Write(payload)
 407		ilog.Writer().Write([]byte{'\n'})
 408		return
 409	}
 410
 411	if crappola(j) {
 412		return
 413	}
 414	what := firstofmany(j, "type")
 415	obj, _ := j.GetString("object")
 416	switch what {
 417	case "Like":
 418		return
 419	case "Dislike":
 420		return
 421	case "Listen":
 422		return
 423	case "EmojiReact":
 424		if originate(obj) != serverName {
 425			return
 426		}
 427	}
 428	who, _ := j.GetString("actor")
 429	if rejectactor(user.ID, who) {
 430		return
 431	}
 432
 433	keyname, err := httpsig.VerifyRequest(r, payload, zaggy)
 434	if err != nil && keyname != "" {
 435		savingthrow(keyname)
 436		keyname, err = httpsig.VerifyRequest(r, payload, zaggy)
 437	}
 438	if err != nil {
 439		ilog.Printf("inbox message failed signature for %s from %s: %s", keyname, r.Header.Get("X-Forwarded-For"), err)
 440		if keyname != "" {
 441			ilog.Printf("bad signature from %s", keyname)
 442		}
 443		http.Error(w, "what did you call me?", http.StatusUnauthorized)
 444		return
 445	}
 446	origin := keymatch(keyname, who)
 447	if origin == "" {
 448		ilog.Printf("keyname actor mismatch: %s <> %s", keyname, who)
 449		if what == "Create" {
 450			var xid string
 451			obj, ok := j.GetMap("object")
 452			if ok {
 453				xid, _ = obj.GetString("id")
 454			} else {
 455				xid, _ = j.GetString("object")
 456			}
 457			if xid != "" {
 458				dlog.Printf("getting forwarded create from %s: %s", keyname, xid)
 459				go grabhonk(user, xid)
 460			}
 461		}
 462		return
 463	}
 464
 465	switch what {
 466	case "Ping":
 467		id, _ := j.GetString("id")
 468		ilog.Printf("ping from %s: %s", who, id)
 469		pong(user, who, id)
 470	case "Pong":
 471		ilog.Printf("pong from %s: %s", who, obj)
 472	case "Follow":
 473		if obj != user.URL {
 474			ilog.Printf("can't follow %s", obj)
 475			return
 476		}
 477		followme(user, who, who, j)
 478	case "Accept":
 479		followyou2(user, j)
 480	case "Reject":
 481		nofollowyou2(user, j)
 482	case "Update":
 483		obj, ok := j.GetMap("object")
 484		if ok {
 485			what := firstofmany(obj, "type")
 486			switch what {
 487			case "Service":
 488				fallthrough
 489			case "Person":
 490				return
 491			case "Question":
 492				return
 493			}
 494		}
 495		go xonksaver(user, j, origin)
 496	case "Undo":
 497		obj, ok := j.GetMap("object")
 498		if !ok {
 499			folxid, ok := j.GetString("object")
 500			if ok && originate(folxid) == origin {
 501				unfollowme(user, "", "", j)
 502			}
 503			return
 504		}
 505		what := firstofmany(obj, "type")
 506		switch what {
 507		case "Follow":
 508			unfollowme(user, who, who, j)
 509		case "Announce":
 510			xid, _ := obj.GetString("object")
 511			dlog.Printf("undo announce: %s", xid)
 512		case "Like":
 513		default:
 514			ilog.Printf("unknown undo: %s", what)
 515		}
 516	case "EmojiReact":
 517		obj, ok := j.GetString("object")
 518		if ok {
 519			content, _ := j.GetString("content")
 520			addreaction(user, obj, who, content)
 521		}
 522	default:
 523		go saveandcheck(user, j, origin)
 524	}
 525}
 526
 527func saveandcheck(user *WhatAbout, j junk.Junk, origin string) {
 528	xonk := xonksaver(user, j, origin)
 529	if xonk == nil {
 530		return
 531	}
 532	if sname := shortname(user.ID, xonk.Honker); sname == "" {
 533		dlog.Printf("received unexpected activity from %s", xonk.Honker)
 534		if xonk.Whofore == 0 {
 535			dlog.Printf("it's not even for me!")
 536		}
 537	}
 538}
 539
 540func serverinbox(w http.ResponseWriter, r *http.Request) {
 541	user := getserveruser()
 542	if stealthmode(user.ID, r) {
 543		http.NotFound(w, r)
 544		return
 545	}
 546	var buf bytes.Buffer
 547	io.Copy(&buf, r.Body)
 548	payload := buf.Bytes()
 549	j, err := junk.FromBytes(payload)
 550	if err != nil {
 551		ilog.Printf("bad payload: %s", err)
 552		ilog.Writer().Write(payload)
 553		ilog.Writer().Write([]byte{'\n'})
 554		return
 555	}
 556	if crappola(j) {
 557		return
 558	}
 559	keyname, err := httpsig.VerifyRequest(r, payload, zaggy)
 560	if err != nil && keyname != "" {
 561		savingthrow(keyname)
 562		keyname, err = httpsig.VerifyRequest(r, payload, zaggy)
 563	}
 564	if err != nil {
 565		ilog.Printf("inbox message failed signature for %s from %s: %s", keyname, r.Header.Get("X-Forwarded-For"), err)
 566		if keyname != "" {
 567			ilog.Printf("bad signature from %s", keyname)
 568		}
 569		http.Error(w, "what did you call me?", http.StatusUnauthorized)
 570		return
 571	}
 572	who, _ := j.GetString("actor")
 573	origin := keymatch(keyname, who)
 574	if origin == "" {
 575		ilog.Printf("keyname actor mismatch: %s <> %s", keyname, who)
 576		return
 577	}
 578	if rejectactor(user.ID, who) {
 579		return
 580	}
 581	re_ont := regexp.MustCompile(serverURL("/o") + "/([\\pL[:digit:]]+)")
 582	what := firstofmany(j, "type")
 583	dlog.Printf("server got a %s", what)
 584	switch what {
 585	case "Follow":
 586		obj, _ := j.GetString("object")
 587		if obj == user.URL {
 588			ilog.Printf("can't follow the server!")
 589			return
 590		}
 591		m := re_ont.FindStringSubmatch(obj)
 592		if len(m) != 2 {
 593			ilog.Printf("not sure how to handle this")
 594			return
 595		}
 596		ont := "#" + m[1]
 597
 598		followme(user, who, ont, j)
 599	case "Undo":
 600		obj, ok := j.GetMap("object")
 601		if !ok {
 602			ilog.Printf("unknown undo no object")
 603			return
 604		}
 605		what := firstofmany(obj, "type")
 606		if what != "Follow" {
 607			ilog.Printf("unknown undo: %s", what)
 608			return
 609		}
 610		targ, _ := obj.GetString("object")
 611		m := re_ont.FindStringSubmatch(targ)
 612		if len(m) != 2 {
 613			ilog.Printf("not sure how to handle this")
 614			return
 615		}
 616		ont := "#" + m[1]
 617		unfollowme(user, who, ont, j)
 618	default:
 619		ilog.Printf("unhandled server activity: %s", what)
 620		dumpactivity(j)
 621	}
 622}
 623
 624func serveractor(w http.ResponseWriter, r *http.Request) {
 625	user := getserveruser()
 626	if stealthmode(user.ID, r) {
 627		http.NotFound(w, r)
 628		return
 629	}
 630	j := junkuser(user)
 631	j.Write(w)
 632}
 633
 634func ximport(w http.ResponseWriter, r *http.Request) {
 635	u := login.GetUserInfo(r)
 636	xid := strings.TrimSpace(r.FormValue("q"))
 637	xonk := getxonk(u.UserID, xid)
 638	if xonk == nil {
 639		p, _ := investigate(xid)
 640		if p != nil {
 641			xid = p.XID
 642		}
 643		j, err := GetJunk(u.UserID, xid)
 644		if err != nil {
 645			http.Error(w, "error getting external object", http.StatusInternalServerError)
 646			ilog.Printf("error getting external object: %s", err)
 647			return
 648		}
 649		allinjest(originate(xid), j)
 650		dlog.Printf("importing %s", xid)
 651		user, _ := butwhatabout(u.Username)
 652
 653		info, _ := somethingabout(j)
 654		if info == nil {
 655			xonk = xonksaver(user, j, originate(xid))
 656		} else if info.What == SomeActor {
 657			outbox, _ := j.GetString("outbox")
 658			gimmexonks(user, outbox)
 659			http.Redirect(w, r, "/h?xid="+url.QueryEscape(xid), http.StatusSeeOther)
 660			return
 661		} else if info.What == SomeCollection {
 662			gimmexonks(user, xid)
 663			http.Redirect(w, r, "/xzone", http.StatusSeeOther)
 664			return
 665		}
 666	}
 667	convoy := ""
 668	if xonk != nil {
 669		convoy = xonk.Convoy
 670	}
 671	http.Redirect(w, r, "/t?c="+url.QueryEscape(convoy), http.StatusSeeOther)
 672}
 673
 674func xzone(w http.ResponseWriter, r *http.Request) {
 675	u := login.GetUserInfo(r)
 676	rows, err := stmtRecentHonkers.Query(u.UserID, u.UserID)
 677	if err != nil {
 678		elog.Printf("query err: %s", err)
 679		return
 680	}
 681	defer rows.Close()
 682	var honkers []Honker
 683	for rows.Next() {
 684		var xid string
 685		rows.Scan(&xid)
 686		honkers = append(honkers, Honker{XID: xid})
 687	}
 688	rows.Close()
 689	for i := range honkers {
 690		_, honkers[i].Handle = handles(honkers[i].XID)
 691	}
 692	templinfo := getInfo(r)
 693	templinfo["XCSRF"] = login.GetCSRF("ximport", r)
 694	templinfo["Honkers"] = honkers
 695	err = readviews.Execute(w, "xzone.html", templinfo)
 696	if err != nil {
 697		elog.Print(err)
 698	}
 699}
 700
 701var oldoutbox = gencache.New(gencache.Options[string, []byte]{Fill: func(name string) ([]byte, bool) {
 702	user, err := butwhatabout(name)
 703	if err != nil {
 704		return nil, false
 705	}
 706	honks := gethonksbyuser(name, false, 0)
 707	if len(honks) > 20 {
 708		honks = honks[0:20]
 709	}
 710
 711	var jonks []junk.Junk
 712	for _, h := range honks {
 713		j, _ := jonkjonk(user, h)
 714		jonks = append(jonks, j)
 715	}
 716
 717	j := junk.New()
 718	j["@context"] = itiswhatitis
 719	j["id"] = user.URL + "/outbox"
 720	j["attributedTo"] = user.URL
 721	j["type"] = "OrderedCollection"
 722	j["totalItems"] = len(jonks)
 723	j["orderedItems"] = jonks
 724
 725	return j.ToBytes(), true
 726}, Duration: 1 * time.Minute})
 727
 728func outbox(w http.ResponseWriter, r *http.Request) {
 729	name := mux.Vars(r)["name"]
 730	user, err := butwhatabout(name)
 731	if err != nil {
 732		http.NotFound(w, r)
 733		return
 734	}
 735	if stealthmode(user.ID, r) {
 736		http.NotFound(w, r)
 737		return
 738	}
 739	j, ok := oldoutbox.Get(name)
 740	if ok {
 741		w.Header().Set("Content-Type", theonetruename)
 742		w.Write(j)
 743	} else {
 744		http.NotFound(w, r)
 745	}
 746}
 747
 748var oldempties = gencache.New(gencache.Options[string, []byte]{Fill: func(url string) ([]byte, bool) {
 749	colname := "/followers"
 750	if strings.HasSuffix(url, "/following") {
 751		colname = "/following"
 752	}
 753	user := serverURL("%s", url[:len(url)-10])
 754	j := junk.New()
 755	j["@context"] = itiswhatitis
 756	j["id"] = user + colname
 757	j["attributedTo"] = user
 758	j["type"] = "OrderedCollection"
 759	j["totalItems"] = 0
 760	j["orderedItems"] = []junk.Junk{}
 761
 762	return j.ToBytes(), true
 763}})
 764
 765func emptiness(w http.ResponseWriter, r *http.Request) {
 766	name := mux.Vars(r)["name"]
 767	user, err := butwhatabout(name)
 768	if err != nil {
 769		http.NotFound(w, r)
 770		return
 771	}
 772	if stealthmode(user.ID, r) {
 773		http.NotFound(w, r)
 774		return
 775	}
 776	j, ok := oldempties.Get(r.URL.Path)
 777	if ok {
 778		w.Header().Set("Content-Type", theonetruename)
 779		w.Write(j)
 780	} else {
 781		http.NotFound(w, r)
 782	}
 783}
 784
 785func showuser(w http.ResponseWriter, r *http.Request) {
 786	name := mux.Vars(r)["name"]
 787	user, err := butwhatabout(name)
 788	if err != nil {
 789		ilog.Printf("user not found %s: %s", name, err)
 790		http.NotFound(w, r)
 791		return
 792	}
 793	if stealthmode(user.ID, r) {
 794		http.NotFound(w, r)
 795		return
 796	}
 797	wantjson := false
 798	if strings.HasSuffix(r.URL.Path, ".json") {
 799		wantjson = true
 800	}
 801	if friendorfoe(r.Header.Get("Accept")) || wantjson {
 802		j, ok := asjonker(name)
 803		if ok {
 804			w.Header().Set("Content-Type", theonetruename)
 805			w.Write(j)
 806		} else {
 807			http.NotFound(w, r)
 808		}
 809		return
 810	}
 811	u := login.GetUserInfo(r)
 812	if u != nil && u.Username != name {
 813		u = nil
 814	}
 815	honks := gethonksbyuser(name, u != nil, 0)
 816	templinfo := getInfo(r)
 817	templinfo["PageName"] = "user"
 818	templinfo["PageArg"] = name
 819	templinfo["Name"] = user.Name
 820	templinfo["Honkology"] = oguser(user)
 821	templinfo["WhatAbout"] = user.HTAbout
 822	templinfo["ServerMessage"] = ""
 823	templinfo["APAltLink"] = templates.Sprintf("<link href='%s' rel='alternate' type='application/activity+json'>", user.URL)
 824	if u != nil {
 825		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 826	}
 827	honkpage(w, u, honks, templinfo)
 828}
 829
 830func showhonker(w http.ResponseWriter, r *http.Request) {
 831	u := login.GetUserInfo(r)
 832	name := mux.Vars(r)["name"]
 833	var honks []*Honk
 834	if name == "" {
 835		name = r.FormValue("xid")
 836		honks = gethonksbyxonker(u.UserID, name, 0)
 837	} else {
 838		honks = gethonksbyhonker(u.UserID, name, 0)
 839	}
 840	miniform := templates.Sprintf(`<form action="/submithonker" method="POST">
 841<input type="hidden" name="CSRF" value="%s">
 842<input type="hidden" name="url" value="%s">
 843<button tabindex=1 name="add honker" value="add honker">add honker</button>
 844</form>`, login.GetCSRF("submithonker", r), name)
 845	msg := templates.Sprintf(`honks by honker: <a href="%s" ref="noreferrer">%s</a>%s`, name, name, miniform)
 846	templinfo := getInfo(r)
 847	templinfo["PageName"] = "honker"
 848	templinfo["PageArg"] = name
 849	templinfo["ServerMessage"] = msg
 850	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 851	honkpage(w, u, honks, templinfo)
 852}
 853
 854func showcombo(w http.ResponseWriter, r *http.Request) {
 855	name := mux.Vars(r)["name"]
 856	u := login.GetUserInfo(r)
 857	honks := gethonksbycombo(u.UserID, name, 0)
 858	honks = osmosis(honks, u.UserID, true)
 859	templinfo := getInfo(r)
 860	templinfo["PageName"] = "combo"
 861	templinfo["PageArg"] = name
 862	templinfo["ServerMessage"] = "honks by combo: " + name
 863	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 864	honkpage(w, u, honks, templinfo)
 865}
 866func showconvoy(w http.ResponseWriter, r *http.Request) {
 867	c := r.FormValue("c")
 868	u := login.GetUserInfo(r)
 869	honks := gethonksbyconvoy(u.UserID, c, 0)
 870	templinfo := getInfo(r)
 871	if len(honks) > 0 {
 872		templinfo["TopHID"] = honks[0].ID
 873	}
 874	honks = osmosis(honks, u.UserID, false)
 875	//reversehonks(honks)
 876	honks = threadsort(honks)
 877	templinfo["PageName"] = "convoy"
 878	templinfo["PageArg"] = c
 879	templinfo["ServerMessage"] = "honks in convoy: " + c
 880	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 881	honkpage(w, u, honks, templinfo)
 882}
 883func showsearch(w http.ResponseWriter, r *http.Request) {
 884	q := r.FormValue("q")
 885	if strings.HasPrefix(q, "https://") {
 886		ximport(w, r)
 887		return
 888	}
 889	u := login.GetUserInfo(r)
 890	honks := gethonksbysearch(u.UserID, q, 0)
 891	templinfo := getInfo(r)
 892	templinfo["PageName"] = "search"
 893	templinfo["PageArg"] = q
 894	templinfo["ServerMessage"] = "honks for search: " + q
 895	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 896	honkpage(w, u, honks, templinfo)
 897}
 898func showontology(w http.ResponseWriter, r *http.Request) {
 899	name := mux.Vars(r)["name"]
 900	u := login.GetUserInfo(r)
 901	var userid int64 = -1
 902	if u != nil {
 903		userid = u.UserID
 904	}
 905	honks := gethonksbyontology(userid, "#"+name, 0)
 906	if friendorfoe(r.Header.Get("Accept")) {
 907		if len(honks) > 40 {
 908			honks = honks[0:40]
 909		}
 910
 911		var xids []string
 912		for _, h := range honks {
 913			xids = append(xids, h.XID)
 914		}
 915
 916		user := getserveruser()
 917
 918		j := junk.New()
 919		j["@context"] = itiswhatitis
 920		j["id"] = serverURL("/o/%s", name)
 921		j["name"] = "#" + name
 922		j["attributedTo"] = user.URL
 923		j["type"] = "OrderedCollection"
 924		j["totalItems"] = len(xids)
 925		j["orderedItems"] = xids
 926
 927		j.Write(w)
 928		return
 929	}
 930
 931	templinfo := getInfo(r)
 932	templinfo["ServerMessage"] = "honks by ontology: " + name
 933	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 934	honkpage(w, u, honks, templinfo)
 935}
 936
 937type Ont struct {
 938	Name  string
 939	Count int64
 940}
 941
 942func thelistingoftheontologies(w http.ResponseWriter, r *http.Request) {
 943	u := login.GetUserInfo(r)
 944	var userid int64 = -1
 945	if u != nil {
 946		userid = u.UserID
 947	}
 948	rows, err := stmtAllOnts.Query(userid)
 949	if err != nil {
 950		elog.Printf("selection error: %s", err)
 951		return
 952	}
 953	defer rows.Close()
 954	var onts, pops []Ont
 955	for rows.Next() {
 956		var o Ont
 957		err := rows.Scan(&o.Name, &o.Count)
 958		if err != nil {
 959			elog.Printf("error scanning ont: %s", err)
 960			continue
 961		}
 962		if utf8.RuneCountInString(o.Name) > 24 {
 963			continue
 964		}
 965		o.Name = o.Name[1:]
 966		onts = append(onts, o)
 967		if o.Count > 1 {
 968			pops = append(pops, o)
 969		}
 970	}
 971	sort.Slice(onts, func(i, j int) bool {
 972		return onts[i].Name < onts[j].Name
 973	})
 974	sort.Slice(pops, func(i, j int) bool {
 975		return pops[i].Count > pops[j].Count
 976	})
 977	if len(pops) > 40 {
 978		pops = pops[:40]
 979	}
 980	if u == nil && !develMode {
 981		w.Header().Set("Cache-Control", "max-age=300")
 982	}
 983	templinfo := getInfo(r)
 984	templinfo["Pops"] = pops
 985	templinfo["Onts"] = onts
 986	templinfo["FirstRune"] = func(s string) rune { r, _ := utf8.DecodeRuneInString(s); return r }
 987	err = readviews.Execute(w, "onts.html", templinfo)
 988	if err != nil {
 989		elog.Print(err)
 990	}
 991}
 992
 993type Track struct {
 994	xid string
 995	who string
 996}
 997
 998func getbacktracks(xid string) []string {
 999	c := make(chan bool)
1000	dumptracks <- c
1001	<-c
1002	row := stmtGetTracks.QueryRow(xid)
1003	var rawtracks string
1004	err := row.Scan(&rawtracks)
1005	if err != nil {
1006		if err != sql.ErrNoRows {
1007			elog.Printf("error scanning tracks: %s", err)
1008		}
1009		return nil
1010	}
1011	var rcpts []string
1012	for _, f := range strings.Split(rawtracks, " ") {
1013		idx := strings.LastIndexByte(f, '#')
1014		if idx != -1 {
1015			f = f[:idx]
1016		}
1017		if !strings.HasPrefix(f, "https://") {
1018			f = fmt.Sprintf("%%https://%s/inbox", f)
1019		}
1020		rcpts = append(rcpts, f)
1021	}
1022	return rcpts
1023}
1024
1025func savetracks(tracks map[string][]string) {
1026	db := opendatabase()
1027	tx, err := db.Begin()
1028	if err != nil {
1029		elog.Printf("savetracks begin error: %s", err)
1030		return
1031	}
1032	defer func() {
1033		err := tx.Commit()
1034		if err != nil {
1035			elog.Printf("savetracks commit error: %s", err)
1036		}
1037
1038	}()
1039	stmtGetTracks, err := tx.Prepare("select fetches from tracks where xid = ?")
1040	if err != nil {
1041		elog.Printf("savetracks error: %s", err)
1042		return
1043	}
1044	stmtNewTracks, err := tx.Prepare("insert into tracks (xid, fetches) values (?, ?)")
1045	if err != nil {
1046		elog.Printf("savetracks error: %s", err)
1047		return
1048	}
1049	stmtUpdateTracks, err := tx.Prepare("update tracks set fetches = ? where xid = ?")
1050	if err != nil {
1051		elog.Printf("savetracks error: %s", err)
1052		return
1053	}
1054	count := 0
1055	for xid, f := range tracks {
1056		count += len(f)
1057		var prev string
1058		row := stmtGetTracks.QueryRow(xid)
1059		err := row.Scan(&prev)
1060		if err == sql.ErrNoRows {
1061			f = oneofakind(f)
1062			stmtNewTracks.Exec(xid, strings.Join(f, " "))
1063		} else if err == nil {
1064			all := append(strings.Split(prev, " "), f...)
1065			all = oneofakind(all)
1066			stmtUpdateTracks.Exec(strings.Join(all, " "))
1067		} else {
1068			elog.Printf("savetracks error: %s", err)
1069		}
1070	}
1071	dlog.Printf("saved %d new fetches", count)
1072}
1073
1074var trackchan = make(chan Track)
1075var dumptracks = make(chan chan bool)
1076
1077func tracker() {
1078	timeout := 4 * time.Minute
1079	sleeper := time.NewTimer(timeout)
1080	tracks := make(map[string][]string)
1081	workinprogress++
1082	for {
1083		select {
1084		case track := <-trackchan:
1085			tracks[track.xid] = append(tracks[track.xid], track.who)
1086		case <-sleeper.C:
1087			if len(tracks) > 0 {
1088				go savetracks(tracks)
1089				tracks = make(map[string][]string)
1090			}
1091			sleeper.Reset(timeout)
1092		case c := <-dumptracks:
1093			if len(tracks) > 0 {
1094				savetracks(tracks)
1095			}
1096			c <- true
1097		case <-endoftheworld:
1098			if len(tracks) > 0 {
1099				savetracks(tracks)
1100			}
1101			readyalready <- true
1102			return
1103		}
1104	}
1105}
1106
1107var re_keyholder = regexp.MustCompile(`keyId="([^"]+)"`)
1108
1109func requestActor(r *http.Request) string {
1110	if sig := r.Header.Get("Signature"); sig != "" {
1111		if m := re_keyholder.FindStringSubmatch(sig); len(m) == 2 {
1112			return m[1]
1113		}
1114	}
1115	return ""
1116}
1117
1118func trackback(xid string, r *http.Request) {
1119	who := requestActor(r)
1120	if who != "" {
1121		trackchan <- Track{xid: xid, who: who}
1122	}
1123}
1124
1125func sameperson(h1, h2 *Honk) bool {
1126	n1, n2 := h1.Honker, h2.Honker
1127	if h1.Oonker != "" {
1128		n1 = h1.Oonker
1129	}
1130	if h2.Oonker != "" {
1131		n2 = h2.Oonker
1132	}
1133	return n1 == n2
1134}
1135
1136func threadposes(honks []*Honk, wanted int64) ([]*Honk, []int) {
1137	var poses []int
1138	var newhonks []*Honk
1139	for i, honk := range honks {
1140		if honk.ID > wanted {
1141			newhonks = append(newhonks, honk)
1142			poses = append(poses, i)
1143		}
1144	}
1145	return newhonks, poses
1146}
1147
1148func threadsort(honks []*Honk) []*Honk {
1149	sort.Slice(honks, func(i, j int) bool {
1150		return honks[i].Date.Before(honks[j].Date)
1151	})
1152	honkx := make(map[string]*Honk)
1153	kids := make(map[string][]*Honk)
1154	for _, h := range honks {
1155		honkx[h.XID] = h
1156		rid := h.RID
1157		kids[rid] = append(kids[rid], h)
1158	}
1159	done := make(map[*Honk]bool)
1160	var thread []*Honk
1161	var nextlevel func(p *Honk)
1162	level := 0
1163	nextlevel = func(p *Honk) {
1164		levelup := level < 4
1165		if pp := honkx[p.RID]; p.RID == "" || (pp != nil && sameperson(p, pp)) {
1166			levelup = false
1167		}
1168		if level > 0 && len(kids[p.RID]) == 1 {
1169			if pp := honkx[p.RID]; pp != nil && len(kids[pp.RID]) == 1 {
1170				levelup = false
1171			}
1172		}
1173		if levelup {
1174			level++
1175		}
1176		p.Style += fmt.Sprintf(" level%d", level)
1177		childs := kids[p.XID]
1178		if false {
1179			sort.SliceStable(childs, func(i, j int) bool {
1180				return sameperson(childs[i], p) && !sameperson(childs[j], p)
1181			})
1182		}
1183		if true {
1184			sort.SliceStable(childs, func(i, j int) bool {
1185				return !sameperson(childs[i], p) && sameperson(childs[j], p)
1186			})
1187		}
1188		for _, h := range childs {
1189			if !done[h] {
1190				done[h] = true
1191				thread = append(thread, h)
1192				nextlevel(h)
1193			}
1194		}
1195		if levelup {
1196			level--
1197		}
1198	}
1199	for _, h := range honks {
1200		if !done[h] && h.RID == "" {
1201			done[h] = true
1202			thread = append(thread, h)
1203			nextlevel(h)
1204		}
1205	}
1206	for _, h := range honks {
1207		if !done[h] {
1208			done[h] = true
1209			thread = append(thread, h)
1210			nextlevel(h)
1211		}
1212	}
1213	return thread
1214}
1215
1216func oguser(user *WhatAbout) template.HTML {
1217	short := user.About
1218	if len(short) > 160 {
1219		short = short[0:160] + "..."
1220	}
1221	title := user.Display
1222	imgurl := avatarURL(user)
1223	return templates.Sprintf(
1224		`<meta property="og:title" content="%s" />
1225<meta property="og:type" content="website" />
1226<meta property="og:url" content="%s" />
1227<meta property="og:image" content="%s" />
1228<meta property="og:description" content="%s" />`,
1229		title, user.URL, imgurl, short)
1230}
1231
1232func honkology(honk *Honk) template.HTML {
1233	user, ok := somenumberedusers.Get(honk.UserID)
1234	if !ok {
1235		return ""
1236	}
1237	title := fmt.Sprintf("%s: %s", user.Display, honk.Precis)
1238	imgurl := avatarURL(user)
1239	for _, d := range honk.Donks {
1240		if d.Local && strings.HasPrefix(d.Media, "image") {
1241			imgurl = d.URL
1242			break
1243		}
1244	}
1245	short := honk.Noise
1246	if len(short) > 160 {
1247		short = short[0:160] + "..."
1248	}
1249	return templates.Sprintf(
1250		`<meta property="og:title" content="%s" />
1251<meta property="og:type" content="article" />
1252<meta property="article:author" content="%s" />
1253<meta property="og:url" content="%s" />
1254<meta property="og:image" content="%s" />
1255<meta property="og:description" content="%s" />`,
1256		title, user.URL, honk.XID, imgurl, short)
1257}
1258
1259func showonehonk(w http.ResponseWriter, r *http.Request) {
1260	name := mux.Vars(r)["name"]
1261	user, err := butwhatabout(name)
1262	if err != nil {
1263		http.NotFound(w, r)
1264		return
1265	}
1266	if stealthmode(user.ID, r) {
1267		http.NotFound(w, r)
1268		return
1269	}
1270	wantjson := false
1271	path := r.URL.Path
1272	if strings.HasSuffix(path, ".json") {
1273		path = path[:len(path)-5]
1274		wantjson = true
1275	}
1276	xid := serverURL("%s", path)
1277
1278	if friendorfoe(r.Header.Get("Accept")) || wantjson {
1279		j, ok := gimmejonk(xid)
1280		if ok {
1281			trackback(xid, r)
1282			w.Header().Set("Content-Type", theonetruename)
1283			w.Write(j)
1284		} else {
1285			http.NotFound(w, r)
1286		}
1287		return
1288	}
1289	honk := getxonk(user.ID, xid)
1290	if honk == nil {
1291		http.NotFound(w, r)
1292		return
1293	}
1294	u := login.GetUserInfo(r)
1295	if u != nil && u.UserID != user.ID {
1296		u = nil
1297	}
1298	if !honk.Public {
1299		if u == nil {
1300			http.NotFound(w, r)
1301			return
1302
1303		}
1304		honks := []*Honk{honk}
1305		donksforhonks(honks)
1306		templinfo := getInfo(r)
1307		templinfo["ServerMessage"] = "one honk maybe more"
1308		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
1309		honkpage(w, u, honks, templinfo)
1310		return
1311	}
1312
1313	templinfo := getInfo(r)
1314	rawhonks := gethonksbyconvoy(honk.UserID, honk.Convoy, 0)
1315	//reversehonks(rawhonks)
1316	rawhonks = threadsort(rawhonks)
1317	var honks []*Honk
1318	for i, h := range rawhonks {
1319		if h.XID == xid {
1320			templinfo["Honkology"] = honkology(h)
1321			if i > 0 {
1322				h.Style += " glow"
1323			}
1324		}
1325		if h.Public && (h.Whofore == 2 || h.IsAcked()) {
1326			honks = append(honks, h)
1327		}
1328	}
1329
1330	templinfo["ServerMessage"] = "one honk maybe more"
1331	if u != nil {
1332		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
1333	}
1334	templinfo["APAltLink"] = templates.Sprintf("<link href='%s' rel='alternate' type='application/activity+json'>", xid)
1335	honkpage(w, u, honks, templinfo)
1336}
1337
1338func honkpage(w http.ResponseWriter, u *login.UserInfo, honks []*Honk, templinfo map[string]interface{}) {
1339	var userid int64 = -1
1340	if u != nil {
1341		userid = u.UserID
1342		templinfo["User"], _ = butwhatabout(u.Username)
1343	}
1344	reverbolate(userid, honks)
1345	templinfo["Honks"] = honks
1346	templinfo["MapLink"] = getmaplink(u)
1347	if templinfo["TopHID"] == nil {
1348		if len(honks) > 0 {
1349			templinfo["TopHID"] = honks[0].ID
1350		} else {
1351			templinfo["TopHID"] = 0
1352		}
1353	}
1354	if u == nil && !develMode {
1355		w.Header().Set("Cache-Control", "max-age=60")
1356	}
1357	err := readviews.Execute(w, "honkpage.html", templinfo)
1358	if err != nil {
1359		elog.Print(err)
1360	}
1361}
1362
1363func saveuser(w http.ResponseWriter, r *http.Request) {
1364	whatabout := r.FormValue("whatabout")
1365	whatabout = strings.Replace(whatabout, "\r", "", -1)
1366	u := login.GetUserInfo(r)
1367	user, _ := butwhatabout(u.Username)
1368	db := opendatabase()
1369
1370	options := user.Options
1371	options.SkinnyCSS = r.FormValue("skinny") == "skinny"
1372	options.OmitImages = r.FormValue("omitimages") == "omitimages"
1373	options.MentionAll = r.FormValue("mentionall") == "mentionall"
1374	options.InlineQuotes = r.FormValue("inlineqts") == "inlineqts"
1375	options.MapLink = r.FormValue("maps")
1376	options.Reaction = r.FormValue("reaction")
1377
1378	sendupdate := false
1379	ava := re_avatar.FindString(whatabout)
1380	if ava != "" {
1381		whatabout = re_avatar.ReplaceAllString(whatabout, "")
1382		ava = ava[7:]
1383		if ava[0] == ' ' {
1384			ava = ava[1:]
1385		}
1386		ava = serverURL("/meme/%s", ava)
1387	}
1388	if ava != options.Avatar {
1389		options.Avatar = ava
1390		sendupdate = true
1391	}
1392	ban := re_banner.FindString(whatabout)
1393	if ban != "" {
1394		whatabout = re_banner.ReplaceAllString(whatabout, "")
1395		ban = ban[7:]
1396		if ban[0] == ' ' {
1397			ban = ban[1:]
1398		}
1399		ban = serverURL("/meme/%s", ban)
1400	}
1401	if ban != options.Banner {
1402		options.Banner = ban
1403		sendupdate = true
1404	}
1405	whatabout = strings.TrimSpace(whatabout)
1406	if whatabout != user.About {
1407		sendupdate = true
1408	}
1409	j, err := jsonify(options)
1410	if err == nil {
1411		_, err = db.Exec("update users set about = ?, options = ? where username = ?", whatabout, j, u.Username)
1412	}
1413	if err != nil {
1414		elog.Printf("error bouting what: %s", err)
1415	}
1416	somenamedusers.Clear(u.Username)
1417	somenumberedusers.Clear(u.UserID)
1418	oldjonkers.Clear(u.Username)
1419
1420	if sendupdate {
1421		updateMe(u.Username)
1422	}
1423
1424	http.Redirect(w, r, "/account", http.StatusSeeOther)
1425}
1426
1427func bonkit(xid string, user *WhatAbout) {
1428	dlog.Printf("bonking %s", xid)
1429
1430	xonk := getxonk(user.ID, xid)
1431	if xonk == nil {
1432		return
1433	}
1434	if !xonk.Public {
1435		return
1436	}
1437	if xonk.IsBonked() {
1438		return
1439	}
1440	donksforhonks([]*Honk{xonk})
1441
1442	_, err := stmtUpdateFlags.Exec(flagIsBonked, xonk.ID)
1443	if err != nil {
1444		elog.Printf("error acking bonk: %s", err)
1445	}
1446
1447	oonker := xonk.Oonker
1448	if oonker == "" {
1449		oonker = xonk.Honker
1450	}
1451	dt := time.Now().UTC()
1452	bonk := &Honk{
1453		UserID:   user.ID,
1454		Username: user.Name,
1455		What:     "bonk",
1456		Honker:   user.URL,
1457		Oonker:   oonker,
1458		XID:      xonk.XID,
1459		RID:      xonk.RID,
1460		Noise:    xonk.Noise,
1461		Precis:   xonk.Precis,
1462		URL:      xonk.URL,
1463		Date:     dt,
1464		Donks:    xonk.Donks,
1465		Whofore:  2,
1466		Convoy:   xonk.Convoy,
1467		Audience: []string{thewholeworld, oonker},
1468		Public:   true,
1469		Format:   xonk.Format,
1470		Place:    xonk.Place,
1471		Onts:     xonk.Onts,
1472		Time:     xonk.Time,
1473	}
1474
1475	err = savehonk(bonk)
1476	if err != nil {
1477		elog.Printf("uh oh")
1478		return
1479	}
1480
1481	go honkworldwide(user, bonk)
1482}
1483
1484func submitbonk(w http.ResponseWriter, r *http.Request) {
1485	xid := r.FormValue("xid")
1486	userinfo := login.GetUserInfo(r)
1487	user, _ := butwhatabout(userinfo.Username)
1488
1489	bonkit(xid, user)
1490
1491	if r.FormValue("js") != "1" {
1492		templinfo := getInfo(r)
1493		templinfo["ServerMessage"] = "Bonked!"
1494		err := readviews.Execute(w, "msg.html", templinfo)
1495		if err != nil {
1496			elog.Print(err)
1497		}
1498	}
1499}
1500
1501func sendzonkofsorts(xonk *Honk, user *WhatAbout, what string, aux string) {
1502	zonk := &Honk{
1503		What:     what,
1504		XID:      xonk.XID,
1505		Date:     time.Now().UTC(),
1506		Audience: oneofakind(xonk.Audience),
1507		Noise:    aux,
1508	}
1509	zonk.Public = loudandproud(zonk.Audience)
1510
1511	dlog.Printf("announcing %sed honk: %s", what, xonk.XID)
1512	go honkworldwide(user, zonk)
1513}
1514
1515func zonkit(w http.ResponseWriter, r *http.Request) {
1516	wherefore := r.FormValue("wherefore")
1517	what := r.FormValue("what")
1518	userinfo := login.GetUserInfo(r)
1519	user, _ := butwhatabout(userinfo.Username)
1520
1521	if wherefore == "save" {
1522		xonk := getxonk(userinfo.UserID, what)
1523		if xonk != nil {
1524			_, err := stmtUpdateFlags.Exec(flagIsSaved, xonk.ID)
1525			if err != nil {
1526				elog.Printf("error saving: %s", err)
1527			}
1528		}
1529		return
1530	}
1531
1532	if wherefore == "unsave" {
1533		xonk := getxonk(userinfo.UserID, what)
1534		if xonk != nil {
1535			_, err := stmtClearFlags.Exec(flagIsSaved, xonk.ID)
1536			if err != nil {
1537				elog.Printf("error unsaving: %s", err)
1538			}
1539		}
1540		return
1541	}
1542
1543	if wherefore == "react" {
1544		reaction := user.Options.Reaction
1545		if r2 := r.FormValue("reaction"); r2 != "" {
1546			reaction = r2
1547		}
1548		if reaction == "none" {
1549			return
1550		}
1551		xonk := getxonk(userinfo.UserID, what)
1552		if xonk != nil {
1553			_, err := stmtUpdateFlags.Exec(flagIsReacted, xonk.ID)
1554			if err != nil {
1555				elog.Printf("error saving: %s", err)
1556			}
1557			sendzonkofsorts(xonk, user, "react", reaction)
1558		}
1559		return
1560	}
1561
1562	// my hammer is too big, oh well
1563	defer oldjonks.Flush()
1564
1565	if wherefore == "ack" {
1566		xonk := getxonk(userinfo.UserID, what)
1567		if xonk != nil && !xonk.IsAcked() {
1568			_, err := stmtUpdateFlags.Exec(flagIsAcked, xonk.ID)
1569			if err != nil {
1570				elog.Printf("error acking: %s", err)
1571			}
1572			sendzonkofsorts(xonk, user, "ack", "")
1573		}
1574		return
1575	}
1576
1577	if wherefore == "deack" {
1578		xonk := getxonk(userinfo.UserID, what)
1579		if xonk != nil && xonk.IsAcked() {
1580			_, err := stmtClearFlags.Exec(flagIsAcked, xonk.ID)
1581			if err != nil {
1582				elog.Printf("error deacking: %s", err)
1583			}
1584			sendzonkofsorts(xonk, user, "deack", "")
1585		}
1586		return
1587	}
1588
1589	if wherefore == "bonk" {
1590		user, _ := butwhatabout(userinfo.Username)
1591		bonkit(what, user)
1592		return
1593	}
1594
1595	if wherefore == "unbonk" {
1596		xonk := getbonk(userinfo.UserID, what)
1597		if xonk != nil {
1598			deletehonk(xonk.ID)
1599			xonk = getxonk(userinfo.UserID, what)
1600			_, err := stmtClearFlags.Exec(flagIsBonked, xonk.ID)
1601			if err != nil {
1602				elog.Printf("error unbonking: %s", err)
1603			}
1604			sendzonkofsorts(xonk, user, "unbonk", "")
1605		}
1606		return
1607	}
1608
1609	if wherefore == "untag" {
1610		xonk := getxonk(userinfo.UserID, what)
1611		if xonk != nil {
1612			_, err := stmtUpdateFlags.Exec(flagIsUntagged, xonk.ID)
1613			if err != nil {
1614				elog.Printf("error untagging: %s", err)
1615			}
1616		}
1617		var badparents map[string]bool
1618		untagged.GetAndLock(userinfo.UserID, &badparents)
1619		badparents[what] = true
1620		untagged.Unlock()
1621		return
1622	}
1623
1624	ilog.Printf("zonking %s %s", wherefore, what)
1625	if wherefore == "zonk" {
1626		xonk := getxonk(userinfo.UserID, what)
1627		if xonk != nil {
1628			deletehonk(xonk.ID)
1629			if xonk.Whofore == 2 || xonk.Whofore == 3 {
1630				sendzonkofsorts(xonk, user, "zonk", "")
1631			}
1632		}
1633	}
1634	_, err := stmtSaveZonker.Exec(userinfo.UserID, what, wherefore)
1635	if err != nil {
1636		elog.Printf("error saving zonker: %s", err)
1637		return
1638	}
1639}
1640
1641func edithonkpage(w http.ResponseWriter, r *http.Request) {
1642	u := login.GetUserInfo(r)
1643	user, _ := butwhatabout(u.Username)
1644	xid := r.FormValue("xid")
1645	honk := getxonk(u.UserID, xid)
1646	if !canedithonk(user, honk) {
1647		http.Error(w, "no editing that please", http.StatusInternalServerError)
1648		return
1649	}
1650	noise := honk.Noise
1651	var savedfiles []string
1652
1653	honks := []*Honk{honk}
1654	donksforhonks(honks)
1655	for _, d := range honk.Donks {
1656		savedfiles = append(savedfiles, fmt.Sprintf("%s:%d", d.XID, d.FileID))
1657	}
1658	reverbolate(u.UserID, honks)
1659
1660	templinfo := getInfo(r)
1661	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
1662	templinfo["Honks"] = honks
1663	templinfo["MapLink"] = getmaplink(u)
1664	templinfo["Noise"] = noise
1665	templinfo["SavedPlace"] = honk.Place
1666	if tm := honk.Time; tm != nil {
1667		templinfo["ShowTime"] = " "
1668		templinfo["StartTime"] = tm.StartTime.Format("2006-01-02 15:04")
1669		if tm.Duration != 0 {
1670			templinfo["Duration"] = tm.Duration
1671		}
1672	}
1673	templinfo["Onties"] = honk.Onties
1674	templinfo["SeeAlso"] = honk.SeeAlso
1675	templinfo["Link"] = honk.Link
1676	templinfo["LegalName"] = honk.LegalName
1677	templinfo["ServerMessage"] = "honk edit"
1678	templinfo["IsPreview"] = true
1679	templinfo["UpdateXID"] = honk.XID
1680	if len(savedfiles) > 0 {
1681		templinfo["SavedFile"] = strings.Join(savedfiles, ",")
1682	}
1683	err := readviews.Execute(w, "honkpage.html", templinfo)
1684	if err != nil {
1685		elog.Print(err)
1686	}
1687}
1688
1689func newhonkpage(w http.ResponseWriter, r *http.Request) {
1690	u := login.GetUserInfo(r)
1691	rid := r.FormValue("rid")
1692	noise := ""
1693
1694	xonk := getxonk(u.UserID, rid)
1695	if xonk != nil {
1696		_, replto := handles(xonk.Honker)
1697		if replto != "" {
1698			noise = "@" + replto + " "
1699		}
1700	}
1701
1702	templinfo := getInfo(r)
1703	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
1704	templinfo["InReplyTo"] = rid
1705	templinfo["Noise"] = noise
1706	templinfo["ServerMessage"] = "compose honk"
1707	templinfo["IsPreview"] = true
1708	err := readviews.Execute(w, "honkpage.html", templinfo)
1709	if err != nil {
1710		elog.Print(err)
1711	}
1712}
1713
1714func canedithonk(user *WhatAbout, honk *Honk) bool {
1715	if honk == nil || honk.Honker != user.URL || honk.What == "bonk" {
1716		return false
1717	}
1718	return true
1719}
1720
1721func submitdonk(w http.ResponseWriter, r *http.Request) ([]*Donk, error) {
1722	if !strings.HasPrefix(strings.ToLower(r.Header.Get("Content-Type")), "multipart/form-data") {
1723		return nil, nil
1724	}
1725	var donks []*Donk
1726	for i, hdr := range r.MultipartForm.File["donk"] {
1727		if i > 16 {
1728			break
1729		}
1730		donk, err := formtodonk(w, r, hdr)
1731		if err != nil {
1732			return nil, err
1733		}
1734		donks = append(donks, donk)
1735	}
1736	return donks, nil
1737}
1738
1739func formtodonk(w http.ResponseWriter, r *http.Request, filehdr *multipart.FileHeader) (*Donk, error) {
1740	file, err := filehdr.Open()
1741	if err != nil {
1742		if err == http.ErrMissingFile {
1743			return nil, nil
1744		}
1745		elog.Printf("error reading donk: %s", err)
1746		http.Error(w, "error reading donk", http.StatusUnsupportedMediaType)
1747		return nil, err
1748	}
1749	var buf bytes.Buffer
1750	io.Copy(&buf, file)
1751	file.Close()
1752	data := buf.Bytes()
1753	var media, name string
1754	img, err := bigshrink(data)
1755	if err == nil {
1756		data = img.Data
1757		format := img.Format
1758		media = "image/" + format
1759		if format == "jpeg" {
1760			format = "jpg"
1761		}
1762		if format == "svg+xml" {
1763			format = "svg"
1764		}
1765		name = xfiltrate() + "." + format
1766	} else {
1767		ct := http.DetectContentType(data)
1768		switch ct {
1769		case "application/pdf":
1770			maxsize := 10000000
1771			if len(data) > maxsize {
1772				ilog.Printf("bad image: %s too much pdf: %d", err, len(data))
1773				http.Error(w, "didn't like your attachment", http.StatusUnsupportedMediaType)
1774				return nil, err
1775			}
1776			media = ct
1777			name = filehdr.Filename
1778			if name == "" {
1779				name = xfiltrate() + ".pdf"
1780			}
1781		default:
1782			maxsize := 100000
1783			if len(data) > maxsize {
1784				ilog.Printf("bad image: %s too much text: %d", err, len(data))
1785				http.Error(w, "didn't like your attachment", http.StatusUnsupportedMediaType)
1786				return nil, err
1787			}
1788			for i := 0; i < len(data); i++ {
1789				if data[i] < 32 && data[i] != '\t' && data[i] != '\r' && data[i] != '\n' {
1790					ilog.Printf("bad image: %s not text: %d", err, data[i])
1791					http.Error(w, "didn't like your attachment", http.StatusUnsupportedMediaType)
1792					return nil, err
1793				}
1794			}
1795			media = "text/plain"
1796			name = filehdr.Filename
1797			if name == "" {
1798				name = xfiltrate() + ".txt"
1799			}
1800		}
1801	}
1802	desc := strings.TrimSpace(r.FormValue("donkdesc"))
1803	if desc == "" {
1804		desc = name
1805	}
1806	fileid, xid, err := savefileandxid(name, desc, "", media, true, data)
1807	if err != nil {
1808		elog.Printf("unable to save image: %s", err)
1809		http.Error(w, "failed to save attachment", http.StatusUnsupportedMediaType)
1810		return nil, err
1811	}
1812	d := &Donk{
1813		FileID: fileid,
1814		XID:    xid,
1815		Desc:   desc,
1816		Local:  true,
1817	}
1818	return d, nil
1819}
1820
1821func websubmithonk(w http.ResponseWriter, r *http.Request) {
1822	h := submithonk(w, r)
1823	if h == nil {
1824		return
1825	}
1826	redir := h.XID[len(serverURL("")):]
1827	http.Redirect(w, r, redir, http.StatusSeeOther)
1828}
1829
1830// what a hot mess this function is
1831func submithonk(w http.ResponseWriter, r *http.Request) *Honk {
1832	rid := r.FormValue("rid")
1833	noise := r.FormValue("noise")
1834	format := r.FormValue("format")
1835	if format == "" {
1836		format = "markdown"
1837	}
1838	if !(format == "markdown" || format == "html") {
1839		http.Error(w, "unknown format", 500)
1840		return nil
1841	}
1842
1843	userinfo := login.GetUserInfo(r)
1844	user, _ := butwhatabout(userinfo.Username)
1845
1846	dt := time.Now().UTC()
1847	updatexid := r.FormValue("updatexid")
1848	var honk *Honk
1849	if updatexid != "" {
1850		honk = getxonk(userinfo.UserID, updatexid)
1851		if !canedithonk(user, honk) {
1852			http.Error(w, "no editing that please", http.StatusInternalServerError)
1853			return nil
1854		}
1855		honk.Date = dt
1856		honk.What = "update"
1857		honk.Format = format
1858	} else {
1859		xid := fmt.Sprintf("%s/%s/%s", user.URL, honkSep, xfiltrate())
1860		what := "honk"
1861		honk = &Honk{
1862			UserID:   userinfo.UserID,
1863			Username: userinfo.Username,
1864			What:     what,
1865			Honker:   user.URL,
1866			XID:      xid,
1867			Date:     dt,
1868			Format:   format,
1869		}
1870	}
1871	honk.SeeAlso = strings.TrimSpace(r.FormValue("seealso"))
1872	honk.Onties = strings.TrimSpace(r.FormValue("onties"))
1873	honk.Link = strings.TrimSpace(r.FormValue("link"))
1874	honk.LegalName = strings.TrimSpace(r.FormValue("legalname"))
1875
1876	var convoy string
1877	noise = strings.Replace(noise, "\r", "", -1)
1878	if updatexid == "" && rid == "" {
1879		noise = re_convoy.ReplaceAllStringFunc(noise, func(m string) string {
1880			convoy = m[7:]
1881			convoy = strings.TrimSpace(convoy)
1882			if !re_convalidate.MatchString(convoy) {
1883				convoy = ""
1884			}
1885			return ""
1886		})
1887	}
1888	noise = quickrename(noise, userinfo.UserID)
1889	honk.Noise = noise
1890	precipitate(honk)
1891	noise = honk.Noise
1892	translate(honk)
1893
1894	if rid != "" {
1895		xonk := getxonk(userinfo.UserID, rid)
1896		if xonk == nil {
1897			http.Error(w, "replyto disappeared", http.StatusNotFound)
1898			return nil
1899		}
1900		if xonk.Public {
1901			honk.Audience = append(honk.Audience, xonk.Audience...)
1902		}
1903		convoy = xonk.Convoy
1904		for i, a := range honk.Audience {
1905			if a == thewholeworld {
1906				honk.Audience[0], honk.Audience[i] = honk.Audience[i], honk.Audience[0]
1907				break
1908			}
1909		}
1910		honk.RID = rid
1911		if xonk.Precis != "" && honk.Precis == "" {
1912			honk.Precis = xonk.Precis
1913			if !re_dangerous.MatchString(honk.Precis) {
1914				honk.Precis = "re: " + honk.Precis
1915			}
1916		}
1917	} else if updatexid == "" {
1918		honk.Audience = []string{thewholeworld}
1919	}
1920	if noise != "" && noise[0] == '@' {
1921		honk.Audience = append(grapevine(honk.Mentions), honk.Audience...)
1922	} else {
1923		honk.Audience = append(honk.Audience, grapevine(honk.Mentions)...)
1924	}
1925	honk.Convoy = convoy
1926
1927	if honk.Convoy == "" {
1928		honk.Convoy = "data:,electrichonkytonk-" + xfiltrate()
1929	}
1930	butnottooloud(honk.Audience)
1931	honk.Audience = oneofakind(honk.Audience)
1932	if len(honk.Audience) == 0 {
1933		ilog.Printf("honk to nowhere")
1934		http.Error(w, "honk to nowhere...", http.StatusNotFound)
1935		return nil
1936	}
1937	honk.Public = loudandproud(honk.Audience)
1938
1939	donkxid := strings.Join(r.Form["donkxid"], ",")
1940	if donkxid == "" {
1941		donks, err := submitdonk(w, r)
1942		if err != nil && err != http.ErrMissingFile {
1943			return nil
1944		}
1945		if len(donks) > 0 {
1946			honk.Donks = append(honk.Donks, donks...)
1947			var xids []string
1948			for _, d := range honk.Donks {
1949				xids = append(xids, fmt.Sprintf("%s:%d", d.XID, d.FileID))
1950			}
1951			donkxid = strings.Join(xids, ",")
1952		}
1953	} else {
1954		xids := strings.Split(donkxid, ",")
1955		for i, xid := range xids {
1956			if i > 16 {
1957				break
1958			}
1959			p := strings.Split(xid, ":")
1960			xid = p[0]
1961			url := serverURL("/d/%s", xid)
1962			var donk *Donk
1963			if len(p) > 1 {
1964				fileid, _ := strconv.ParseInt(p[1], 10, 0)
1965				donk = finddonkid(fileid, url)
1966			} else {
1967				donk = finddonk(url)
1968			}
1969			if donk != nil {
1970				honk.Donks = append(honk.Donks, donk)
1971			} else {
1972				ilog.Printf("can't find file: %s", xid)
1973			}
1974		}
1975	}
1976	memetize(honk)
1977	imaginate(honk)
1978
1979	placename := strings.TrimSpace(r.FormValue("placename"))
1980	placelat := strings.TrimSpace(r.FormValue("placelat"))
1981	placelong := strings.TrimSpace(r.FormValue("placelong"))
1982	placeurl := strings.TrimSpace(r.FormValue("placeurl"))
1983	if placename != "" || placelat != "" || placelong != "" || placeurl != "" {
1984		p := new(Place)
1985		p.Name = placename
1986		p.Latitude, _ = strconv.ParseFloat(placelat, 64)
1987		p.Longitude, _ = strconv.ParseFloat(placelong, 64)
1988		p.Url = placeurl
1989		honk.Place = p
1990	}
1991	timestart := strings.TrimSpace(r.FormValue("timestart"))
1992	if timestart != "" {
1993		t := new(Time)
1994		now := time.Now().Local()
1995		for _, layout := range []string{"2006-01-02 3:04pm", "2006-01-02 15:04", "3:04pm", "15:04"} {
1996			start, err := time.ParseInLocation(layout, timestart, now.Location())
1997			if err == nil {
1998				if start.Year() == 0 {
1999					start = time.Date(now.Year(), now.Month(), now.Day(), start.Hour(), start.Minute(), 0, 0, now.Location())
2000				}
2001				t.StartTime = start
2002				break
2003			}
2004		}
2005		timeend := r.FormValue("timeend")
2006		dur := parseDuration(timeend)
2007		if dur != 0 {
2008			t.Duration = Duration(dur)
2009		}
2010		if !t.StartTime.IsZero() {
2011			honk.What = "event"
2012			honk.Time = t
2013		}
2014	}
2015
2016	if honk.Public {
2017		honk.Whofore = 2
2018	} else {
2019		honk.Whofore = 3
2020	}
2021
2022	// back to markdown
2023	honk.Noise = noise
2024
2025	if r.FormValue("preview") == "preview" {
2026		honks := []*Honk{honk}
2027		reverbolate(userinfo.UserID, honks)
2028		templinfo := getInfo(r)
2029		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
2030		templinfo["Honks"] = honks
2031		templinfo["MapLink"] = getmaplink(userinfo)
2032		templinfo["InReplyTo"] = r.FormValue("rid")
2033		templinfo["Noise"] = r.FormValue("noise")
2034		templinfo["SavedFile"] = donkxid
2035		if tm := honk.Time; tm != nil {
2036			templinfo["ShowTime"] = " "
2037			templinfo["StartTime"] = tm.StartTime.Format("2006-01-02 15:04")
2038			if tm.Duration != 0 {
2039				templinfo["Duration"] = tm.Duration
2040			}
2041		}
2042		templinfo["IsPreview"] = true
2043		templinfo["UpdateXID"] = updatexid
2044		templinfo["ServerMessage"] = "honk preview"
2045		err := readviews.Execute(w, "honkpage.html", templinfo)
2046		if err != nil {
2047			elog.Print(err)
2048		}
2049		return nil
2050	}
2051
2052	if updatexid != "" {
2053		updatehonk(honk)
2054		oldjonks.Clear(honk.XID)
2055	} else {
2056		err := savehonk(honk)
2057		if err != nil {
2058			elog.Printf("uh oh")
2059			return nil
2060		}
2061	}
2062
2063	// reload for consistency
2064	honk.Donks = nil
2065	donksforhonks([]*Honk{honk})
2066
2067	go honkworldwide(user, honk)
2068
2069	return honk
2070}
2071
2072func showhonkers(w http.ResponseWriter, r *http.Request) {
2073	userinfo := login.GetUserInfo(r)
2074	templinfo := getInfo(r)
2075	templinfo["Honkers"] = gethonkers(userinfo.UserID)
2076	templinfo["HonkerCSRF"] = login.GetCSRF("submithonker", r)
2077	err := readviews.Execute(w, "honkers.html", templinfo)
2078	if err != nil {
2079		elog.Print(err)
2080	}
2081}
2082
2083func showchatter(w http.ResponseWriter, r *http.Request) {
2084	u := login.GetUserInfo(r)
2085	chatnewnone(u.UserID)
2086	chatter := loadchatter(u.UserID)
2087	for _, chat := range chatter {
2088		for _, ch := range chat.Chonks {
2089			filterchonk(ch)
2090		}
2091	}
2092
2093	templinfo := getInfo(r)
2094	templinfo["Chatter"] = chatter
2095	templinfo["ChonkCSRF"] = login.GetCSRF("sendchonk", r)
2096	err := readviews.Execute(w, "chatter.html", templinfo)
2097	if err != nil {
2098		elog.Print(err)
2099	}
2100}
2101
2102func submitchonk(w http.ResponseWriter, r *http.Request) {
2103	u := login.GetUserInfo(r)
2104	user, _ := butwhatabout(u.Username)
2105	noise := r.FormValue("noise")
2106	target := r.FormValue("target")
2107	format := "markdown"
2108	dt := time.Now().UTC()
2109	xid := fmt.Sprintf("%s/%s/%s", user.URL, "chonk", xfiltrate())
2110
2111	if !strings.HasPrefix(target, "https://") {
2112		target = fullname(target, u.UserID)
2113	}
2114	if target == "" {
2115		http.Error(w, "who is that?", http.StatusInternalServerError)
2116		return
2117	}
2118	ch := Chonk{
2119		UserID: u.UserID,
2120		XID:    xid,
2121		Who:    user.URL,
2122		Target: target,
2123		Date:   dt,
2124		Noise:  noise,
2125		Format: format,
2126	}
2127	donks, err := submitdonk(w, r)
2128	if err != nil && err != http.ErrMissingFile {
2129		return
2130	}
2131	if len(donks) > 0 {
2132		ch.Donks = append(ch.Donks, donks...)
2133	}
2134
2135	translatechonk(&ch)
2136	savechonk(&ch)
2137	// reload for consistency
2138	ch.Donks = nil
2139	donksforchonks([]*Chonk{&ch})
2140	go sendchonk(user, &ch)
2141
2142	http.Redirect(w, r, "/chatter", http.StatusSeeOther)
2143}
2144
2145var combocache = gencache.New(gencache.Options[int64, []string]{Fill: func(userid int64) ([]string, bool) {
2146	honkers := gethonkers(userid)
2147	var combos []string
2148	for _, h := range honkers {
2149		combos = append(combos, h.Combos...)
2150	}
2151	for i, c := range combos {
2152		if c == "-" {
2153			combos[i] = ""
2154		}
2155	}
2156	combos = oneofakind(combos)
2157	sort.Strings(combos)
2158	return combos, true
2159}, Invalidator: &honkerinvalidator})
2160
2161func showcombos(w http.ResponseWriter, r *http.Request) {
2162	templinfo := getInfo(r)
2163	err := readviews.Execute(w, "combos.html", templinfo)
2164	if err != nil {
2165		elog.Print(err)
2166	}
2167}
2168
2169func websubmithonker(w http.ResponseWriter, r *http.Request) {
2170	h := submithonker(w, r)
2171	if h == nil {
2172		return
2173	}
2174	http.Redirect(w, r, "/honkers", http.StatusSeeOther)
2175}
2176
2177func submithonker(w http.ResponseWriter, r *http.Request) *Honker {
2178	u := login.GetUserInfo(r)
2179	user, _ := butwhatabout(u.Username)
2180	name := strings.TrimSpace(r.FormValue("name"))
2181	url := strings.TrimSpace(r.FormValue("url"))
2182	peep := r.FormValue("peep")
2183	combos := strings.TrimSpace(r.FormValue("combos"))
2184	combos = " " + combos + " "
2185	honkerid, _ := strconv.ParseInt(r.FormValue("honkerid"), 10, 0)
2186
2187	re_namecheck := regexp.MustCompile("^[\\pL[:digit:]_.-]+$")
2188	if name != "" && !re_namecheck.MatchString(name) {
2189		http.Error(w, "please use a plainer name", http.StatusInternalServerError)
2190		return nil
2191	}
2192
2193	var meta HonkerMeta
2194	meta.Notes = strings.TrimSpace(r.FormValue("notes"))
2195	mj, _ := jsonify(&meta)
2196
2197	defer honkerinvalidator.Clear(u.UserID)
2198
2199	// mostly dummy, fill in later...
2200	h := &Honker{
2201		ID: honkerid,
2202	}
2203
2204	if honkerid > 0 {
2205		if r.FormValue("delete") == "delete" {
2206			unfollowyou(user, honkerid, false)
2207			stmtDeleteHonker.Exec(honkerid)
2208			return h
2209		}
2210		if r.FormValue("unsub") == "unsub" {
2211			unfollowyou(user, honkerid, false)
2212		}
2213		if r.FormValue("sub") == "sub" {
2214			followyou(user, honkerid, false)
2215		}
2216		_, err := stmtUpdateHonker.Exec(name, combos, mj, honkerid, u.UserID)
2217		if err != nil {
2218			elog.Printf("update honker err: %s", err)
2219			return nil
2220		}
2221		return h
2222	}
2223
2224	if url == "" {
2225		http.Error(w, "subscribing to nothing?", http.StatusInternalServerError)
2226		return nil
2227	}
2228
2229	flavor := "presub"
2230	if peep == "peep" {
2231		flavor = "peep"
2232	}
2233
2234	var err error
2235	honkerid, flavor, err = savehonker(user, url, name, flavor, combos, mj)
2236	if err != nil {
2237		http.Error(w, "had some trouble with that: "+err.Error(), http.StatusInternalServerError)
2238		return nil
2239	}
2240	if flavor == "presub" {
2241		followyou(user, honkerid, false)
2242	}
2243	h.ID = honkerid
2244	return h
2245}
2246
2247func hfcspage(w http.ResponseWriter, r *http.Request) {
2248	userinfo := login.GetUserInfo(r)
2249
2250	filters := getfilters(userinfo.UserID, filtAny)
2251
2252	templinfo := getInfo(r)
2253	templinfo["Filters"] = filters
2254	templinfo["FilterCSRF"] = login.GetCSRF("filter", r)
2255	err := readviews.Execute(w, "hfcs.html", templinfo)
2256	if err != nil {
2257		elog.Print(err)
2258	}
2259}
2260
2261func accountpage(w http.ResponseWriter, r *http.Request) {
2262	u := login.GetUserInfo(r)
2263	user, _ := butwhatabout(u.Username)
2264	templinfo := getInfo(r)
2265	templinfo["UserCSRF"] = login.GetCSRF("saveuser", r)
2266	templinfo["LogoutCSRF"] = login.GetCSRF("logout", r)
2267	templinfo["User"] = user
2268	about := user.About
2269	if ava := user.Options.Avatar; ava != "" {
2270		about += "\n\navatar: " + ava[strings.LastIndexByte(ava, '/')+1:]
2271	}
2272	if ban := user.Options.Banner; ban != "" {
2273		about += "\n\nbanner: " + ban[strings.LastIndexByte(ban, '/')+1:]
2274	}
2275	templinfo["WhatAbout"] = about
2276	err := readviews.Execute(w, "account.html", templinfo)
2277	if err != nil {
2278		elog.Print(err)
2279	}
2280}
2281
2282func dochpass(w http.ResponseWriter, r *http.Request) {
2283	err := login.ChangePassword(w, r)
2284	if err != nil {
2285		elog.Printf("error changing password: %s", err)
2286	}
2287	http.Redirect(w, r, "/account", http.StatusSeeOther)
2288}
2289
2290var oldfingers = gencache.New(gencache.Options[string, []byte]{Fill: func(orig string) ([]byte, bool) {
2291	if strings.HasPrefix(orig, "acct:") {
2292		orig = orig[5:]
2293	}
2294	name := orig
2295	idx := strings.LastIndexByte(name, '/')
2296	if idx != -1 {
2297		name = name[idx+1:]
2298		if serverURL("/%s/%s", userSep, name) != orig {
2299			ilog.Printf("foreign request rejected")
2300			name = ""
2301		}
2302	} else {
2303		idx = strings.IndexByte(name, '@')
2304		if idx != -1 {
2305			name = name[:idx]
2306			if !(name+"@"+serverName == orig || name+"@"+masqName == orig) {
2307				ilog.Printf("foreign request rejected")
2308				name = ""
2309			}
2310		}
2311	}
2312	user, err := butwhatabout(name)
2313	if err != nil {
2314		return nil, false
2315	}
2316
2317	j := junk.New()
2318	j["subject"] = fmt.Sprintf("acct:%s@%s", user.Name, masqName)
2319	j["aliases"] = []string{user.URL}
2320	l := junk.New()
2321	l["rel"] = "self"
2322	l["type"] = `application/activity+json`
2323	l["href"] = user.URL
2324	j["links"] = []junk.Junk{l}
2325	return j.ToBytes(), true
2326}})
2327
2328func fingerlicker(w http.ResponseWriter, r *http.Request) {
2329	orig := r.FormValue("resource")
2330
2331	dlog.Printf("finger lick: %s", orig)
2332
2333	j, ok := oldfingers.Get(orig)
2334	if ok {
2335		w.Header().Set("Content-Type", "application/jrd+json")
2336		w.Write(j)
2337	} else {
2338		http.NotFound(w, r)
2339	}
2340}
2341
2342func somedays() string {
2343	secs := 432000 + notrand.Int63n(432000)
2344	return fmt.Sprintf("%d", secs)
2345}
2346
2347func lookatme(ava string) string {
2348	if strings.Contains(ava, serverName+"/"+userSep) {
2349		idx := strings.LastIndexByte(ava, '/')
2350		if idx < len(ava) {
2351			name := ava[idx+1:]
2352			user, _ := butwhatabout(name)
2353			if user != nil && user.URL == ava {
2354				return user.Options.Avatar
2355			}
2356		}
2357	}
2358	return ""
2359}
2360
2361func avatate(w http.ResponseWriter, r *http.Request) {
2362	if develMode {
2363		loadAvatarColors()
2364	}
2365	n := r.FormValue("a")
2366	if redir := lookatme(n); redir != "" {
2367		http.Redirect(w, r, redir, http.StatusSeeOther)
2368		return
2369	}
2370	a := genAvatar(n)
2371	if !develMode {
2372		w.Header().Set("Cache-Control", "max-age="+somedays())
2373	}
2374	w.Write(a)
2375}
2376
2377func serveviewasset(w http.ResponseWriter, r *http.Request) {
2378	serveasset(w, r, viewDir)
2379}
2380func servedataasset(w http.ResponseWriter, r *http.Request) {
2381	if r.URL.Path == "/favicon.ico" {
2382		r.URL.Path = "/icon.png"
2383	}
2384	serveasset(w, r, dataDir)
2385}
2386
2387func serveasset(w http.ResponseWriter, r *http.Request, basedir string) {
2388	if !develMode {
2389		w.Header().Set("Cache-Control", "max-age=7776000")
2390	}
2391	http.ServeFile(w, r, basedir+"/views"+r.URL.Path)
2392}
2393func servehelp(w http.ResponseWriter, r *http.Request) {
2394	name := mux.Vars(r)["name"]
2395	if !develMode {
2396		w.Header().Set("Cache-Control", "max-age=3600")
2397	}
2398	http.ServeFile(w, r, viewDir+"/docs/"+name)
2399}
2400func servehtml(w http.ResponseWriter, r *http.Request) {
2401	u := login.GetUserInfo(r)
2402	templinfo := getInfo(r)
2403	templinfo["AboutMsg"] = aboutMsg
2404	templinfo["LoginMsg"] = loginMsg
2405	templinfo["HonkVersion"] = softwareVersion
2406	if r.URL.Path == "/about" {
2407		templinfo["Sensors"] = getSensors()
2408	}
2409	if u == nil && !develMode {
2410		w.Header().Set("Cache-Control", "max-age=60")
2411	}
2412	err := readviews.Execute(w, r.URL.Path[1:]+".html", templinfo)
2413	if err != nil {
2414		elog.Print(err)
2415	}
2416}
2417func serveemu(w http.ResponseWriter, r *http.Request) {
2418	emu := mux.Vars(r)["emu"]
2419
2420	w.Header().Set("Cache-Control", "max-age="+somedays())
2421	http.ServeFile(w, r, dataDir+"/emus/"+emu)
2422}
2423func servememe(w http.ResponseWriter, r *http.Request) {
2424	meme := mux.Vars(r)["meme"]
2425
2426	w.Header().Set("Cache-Control", "max-age="+somedays())
2427	_, err := os.Stat(dataDir + "/memes/" + meme)
2428	if err == nil {
2429		http.ServeFile(w, r, dataDir+"/memes/"+meme)
2430	} else {
2431		mux.Vars(r)["xid"] = meme
2432		servefile(w, r)
2433	}
2434}
2435
2436func servefile(w http.ResponseWriter, r *http.Request) {
2437	if friendorfoe(r.Header.Get("Accept")) {
2438		dlog.Printf("incompatible accept for donk")
2439		http.Error(w, "there are no activities here", http.StatusNotAcceptable)
2440		return
2441	}
2442	xid := mux.Vars(r)["xid"]
2443	preview := r.FormValue("preview") == "1"
2444	var media string
2445	var data []byte
2446	row := stmtGetFileData.QueryRow(xid)
2447	err := row.Scan(&media, &data)
2448	if err != nil {
2449		elog.Printf("error loading file: %s", err)
2450		http.NotFound(w, r)
2451		return
2452	}
2453	if preview && strings.HasPrefix(media, "image") {
2454		img, err := lilshrink(data)
2455		if err == nil {
2456			data = img.Data
2457		}
2458	}
2459	w.Header().Set("Content-Type", media)
2460	w.Header().Set("X-Content-Type-Options", "nosniff")
2461	w.Header().Set("Cache-Control", "max-age="+somedays())
2462	w.Write(data)
2463}
2464
2465func nomoroboto(w http.ResponseWriter, r *http.Request) {
2466	io.WriteString(w, "User-agent: *\n")
2467	io.WriteString(w, "Disallow: /a\n")
2468	io.WriteString(w, "Disallow: /d/\n")
2469	io.WriteString(w, "Disallow: /meme/\n")
2470	io.WriteString(w, "Disallow: /o\n")
2471	io.WriteString(w, "Disallow: /o/\n")
2472	io.WriteString(w, "Disallow: /help/\n")
2473	for _, u := range allusers() {
2474		fmt.Fprintf(w, "Disallow: /%s/%s/%s/\n", userSep, u.Username, honkSep)
2475	}
2476}
2477
2478type Hydration struct {
2479	Tophid    int64
2480	Srvmsg    template.HTML
2481	Honks     string
2482	MeCount   int64
2483	ChatCount int64
2484	Poses     []int
2485}
2486
2487func webhydra(w http.ResponseWriter, r *http.Request) {
2488	u := login.GetUserInfo(r)
2489	userid := u.UserID
2490	templinfo := getInfo(r)
2491	templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
2492	page := r.FormValue("page")
2493
2494	wanted, _ := strconv.ParseInt(r.FormValue("tophid"), 10, 0)
2495
2496	var hydra Hydration
2497
2498	var honks []*Honk
2499	switch page {
2500	case "atme":
2501		honks = gethonksforme(userid, wanted)
2502		honks = osmosis(honks, userid, false)
2503		menewnone(userid)
2504		hydra.Srvmsg = "at me!"
2505	case "longago":
2506		honks = gethonksfromlongago(userid, wanted)
2507		honks = osmosis(honks, userid, false)
2508		hydra.Srvmsg = "from long ago"
2509	case "home":
2510		honks = gethonksforuser(userid, wanted)
2511		honks = osmosis(honks, userid, true)
2512		hydra.Srvmsg = serverMsg
2513	case "first":
2514		honks = gethonksforuserfirstclass(userid, wanted)
2515		honks = osmosis(honks, userid, true)
2516		hydra.Srvmsg = "first class only"
2517	case "saved":
2518		honks = getsavedhonks(userid, wanted)
2519		templinfo["PageName"] = "saved"
2520		hydra.Srvmsg = "saved honks"
2521	case "combo":
2522		c := r.FormValue("c")
2523		honks = gethonksbycombo(userid, c, wanted)
2524		honks = osmosis(honks, userid, false)
2525		hydra.Srvmsg = templates.Sprintf("honks by combo: %s", c)
2526	case "convoy":
2527		c := r.FormValue("c")
2528		honks = gethonksbyconvoy(userid, c, 0)
2529		honks = osmosis(honks, userid, false)
2530		honks = threadsort(honks)
2531		honks, hydra.Poses = threadposes(honks, wanted)
2532		hydra.Srvmsg = templates.Sprintf("honks in convoy: %s", c)
2533	case "honker":
2534		xid := r.FormValue("xid")
2535		honks = gethonksbyxonker(userid, xid, wanted)
2536		miniform := templates.Sprintf(`<form action="/submithonker" method="POST">
2537			<input type="hidden" name="CSRF" value="%s">
2538			<input type="hidden" name="url" value="%s">
2539			<button tabindex=1 name="add honker" value="add honker">add honker</button>
2540			</form>`, login.GetCSRF("submithonker", r), xid)
2541		msg := templates.Sprintf(`honks by honker: <a href="%s" ref="noreferrer">%s</a>%s`, xid, xid, miniform)
2542		hydra.Srvmsg = msg
2543	case "user":
2544		uname := r.FormValue("uname")
2545		honks = gethonksbyuser(uname, u != nil && u.Username == uname, wanted)
2546		hydra.Srvmsg = templates.Sprintf("honks by user: %s", uname)
2547	default:
2548		http.NotFound(w, r)
2549	}
2550
2551	if len(honks) > 0 {
2552		if page == "convoy" {
2553			hydra.Tophid = honks[len(honks)-1].ID
2554		} else {
2555			hydra.Tophid = honks[0].ID
2556		}
2557	} else {
2558		hydra.Tophid = wanted
2559	}
2560	reverbolate(userid, honks)
2561
2562	user, _ := butwhatabout(u.Username)
2563
2564	var buf strings.Builder
2565	templinfo["Honks"] = honks
2566	templinfo["MapLink"] = getmaplink(u)
2567	templinfo["User"], _ = butwhatabout(u.Username)
2568	err := readviews.Execute(&buf, "honkfrags.html", templinfo)
2569	if err != nil {
2570		elog.Printf("frag error: %s", err)
2571		return
2572	}
2573	hydra.Honks = buf.String()
2574	hydra.MeCount = user.Options.MeCount
2575	hydra.ChatCount = user.Options.ChatCount
2576	w.Header().Set("Content-Type", "application/json")
2577	j, _ := jsonify(&hydra)
2578	io.WriteString(w, j)
2579}
2580
2581var honkline = make(chan bool)
2582
2583func honkhonkline() {
2584	for {
2585		select {
2586		case honkline <- true:
2587		default:
2588			return
2589		}
2590	}
2591}
2592
2593func apihandler(w http.ResponseWriter, r *http.Request) {
2594	u := login.GetUserInfo(r)
2595	userid := u.UserID
2596	action := r.FormValue("action")
2597	wait, _ := strconv.ParseInt(r.FormValue("wait"), 10, 0)
2598	dlog.Printf("api request '%s' on behalf of %s", action, u.Username)
2599	switch action {
2600	case "honk":
2601		h := submithonk(w, r)
2602		if h == nil {
2603			return
2604		}
2605		fmt.Fprintf(w, "%s", h.XID)
2606	case "donk":
2607		donks, err := submitdonk(w, r)
2608		if err != nil {
2609			http.Error(w, err.Error(), http.StatusBadRequest)
2610			return
2611		}
2612		if len(donks) == 0 {
2613			http.Error(w, "missing donk", http.StatusBadRequest)
2614			return
2615		}
2616		d := donks[0]
2617		donkxid := fmt.Sprintf("%s:%d", d.XID, d.FileID)
2618		w.Write([]byte(donkxid))
2619	case "zonkit":
2620		zonkit(w, r)
2621	case "gethonks":
2622		var honks []*Honk
2623		wanted, _ := strconv.ParseInt(r.FormValue("after"), 10, 0)
2624		page := r.FormValue("page")
2625		var waitchan <-chan time.Time
2626	requery:
2627		switch page {
2628		case "atme":
2629			honks = gethonksforme(userid, wanted)
2630			honks = osmosis(honks, userid, false)
2631			menewnone(userid)
2632		case "longago":
2633			honks = gethonksfromlongago(userid, wanted)
2634			honks = osmosis(honks, userid, false)
2635		case "home":
2636			honks = gethonksforuser(userid, wanted)
2637			honks = osmosis(honks, userid, true)
2638		case "myhonks":
2639			honks = gethonksbyuser(u.Username, true, wanted)
2640			honks = osmosis(honks, userid, true)
2641		case "saved":
2642			honks = getsavedhonks(userid, wanted)
2643		case "combo":
2644			c := r.FormValue("c")
2645			honks = gethonksbycombo(userid, c, wanted)
2646			honks = osmosis(honks, userid, false)
2647		case "convoy":
2648			c := r.FormValue("c")
2649			honks = gethonksbyconvoy(userid, c, 0)
2650			honks = osmosis(honks, userid, false)
2651			honks = threadsort(honks)
2652			honks, _ = threadposes(honks, wanted)
2653		case "honker":
2654			xid := r.FormValue("xid")
2655			honks = gethonksbyxonker(userid, xid, wanted)
2656		case "search":
2657			q := r.FormValue("q")
2658			honks = gethonksbysearch(u.UserID, q, wanted)
2659		default:
2660			http.Error(w, "unknown page", http.StatusNotFound)
2661			return
2662		}
2663		if len(honks) == 0 && wait > 0 {
2664			if waitchan == nil {
2665				waitchan = time.After(time.Duration(wait) * time.Second)
2666			}
2667			select {
2668			case <-honkline:
2669				goto requery
2670			case <-waitchan:
2671			}
2672		}
2673		reverbolate(userid, honks)
2674		user, _ := butwhatabout(u.Username)
2675		j := junk.New()
2676		j["honks"] = honks
2677		j["mecount"] = user.Options.MeCount
2678		j["chatcount"] = user.Options.ChatCount
2679		j.Write(w)
2680	case "sendactivity":
2681		public := r.FormValue("public") == "1"
2682		user, _ := butwhatabout(u.Username)
2683		rcpts := boxuprcpts(user, r.Form["rcpt"], public)
2684		msg := []byte(r.FormValue("msg"))
2685		for rcpt := range rcpts {
2686			go deliverate(userid, rcpt, msg)
2687		}
2688	case "gethonkers":
2689		j := junk.New()
2690		j["honkers"] = gethonkers(u.UserID)
2691		j.Write(w)
2692	case "savehonker":
2693		h := submithonker(w, r)
2694		if h == nil {
2695			return
2696		}
2697		fmt.Fprintf(w, "%d", h.ID)
2698	default:
2699		http.Error(w, "unknown action", http.StatusNotFound)
2700		return
2701	}
2702}
2703
2704func fiveoh(w http.ResponseWriter, r *http.Request) {
2705	if !develMode {
2706		return
2707	}
2708	fd, err := os.OpenFile("violations.json", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
2709	if err != nil {
2710		elog.Printf("error opening violations! %s", err)
2711		return
2712	}
2713	defer fd.Close()
2714	io.Copy(fd, r.Body)
2715	fd.WriteString("\n")
2716}
2717
2718var endoftheworld = make(chan bool)
2719var readyalready = make(chan bool)
2720var workinprogress = 0
2721var requestWG sync.WaitGroup
2722var listenSocket net.Listener
2723
2724func enditall() {
2725	sig := make(chan os.Signal, 1)
2726	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
2727	<-sig
2728	ilog.Printf("stopping...")
2729	listenSocket.Close()
2730	for i := 0; i < workinprogress; i++ {
2731		endoftheworld <- true
2732	}
2733	if *cpuprofile != "" {
2734		pprof.StopCPUProfile()
2735	}
2736	if *memprofile != "" {
2737		pprof.WriteHeapProfile(memprofilefd)
2738		memprofilefd.Close()
2739	}
2740	ilog.Printf("waiting...")
2741	go func() {
2742		time.Sleep(10 * time.Second)
2743		elog.Printf("timed out waiting for requests to finish")
2744		os.Exit(0)
2745	}()
2746	for i := 0; i < workinprogress; i++ {
2747		<-readyalready
2748	}
2749	requestWG.Wait()
2750	ilog.Printf("apocalypse")
2751	closedatabases()
2752	os.Exit(0)
2753}
2754
2755func bgmonitor() {
2756	for {
2757		when := time.Now().Add(-3 * 24 * time.Hour).UTC().Format(dbtimeformat)
2758		_, err := stmtDeleteOldXonkers.Exec("pubkey", when)
2759		if err != nil {
2760			elog.Printf("error deleting old xonkers: %s", err)
2761		}
2762		zaggies.Flush()
2763		time.Sleep(50 * time.Minute)
2764	}
2765}
2766
2767func addcspheaders(next http.Handler) http.Handler {
2768	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
2769		requestWG.Add(1)
2770		defer requestWG.Done()
2771		policy := "default-src 'none'; script-src 'self'; connect-src 'self'; style-src 'self'; img-src 'self'; media-src 'self'"
2772		if develMode {
2773			policy += "; report-uri /csp-violation"
2774		}
2775		w.Header().Set("Content-Security-Policy", policy)
2776		next.ServeHTTP(w, r)
2777	})
2778}
2779
2780func emuinit() {
2781	var emunames []string
2782	dir, err := os.Open(dataDir + "/emus")
2783	if err == nil {
2784		emunames, _ = dir.Readdirnames(0)
2785		dir.Close()
2786	}
2787	for _, e := range emunames {
2788		if len(e) <= 4 {
2789			continue
2790		}
2791		ext := e[len(e)-4:]
2792		emu := Emu{
2793			ID:   fmt.Sprintf("/emu/%s", e),
2794			Name: e[:len(e)-4],
2795			Type: "image/" + ext[1:],
2796		}
2797		allemus = append(allemus, emu)
2798	}
2799	sort.Slice(allemus, func(i, j int) bool {
2800		return allemus[i].Name < allemus[j].Name
2801	})
2802}
2803
2804var savedassetparams = make(map[string]string)
2805
2806func getassetparam(file string) string {
2807	if p, ok := savedassetparams[file]; ok {
2808		return p
2809	}
2810	data, err := os.ReadFile(file)
2811	if err != nil {
2812		return ""
2813	}
2814	hasher := sha512.New()
2815	hasher.Write(data)
2816
2817	return fmt.Sprintf("?v=%.8x", hasher.Sum(nil))
2818}
2819
2820func startWatcher() {
2821	watcher, err := gonix.NewWatcher()
2822	if err != nil {
2823		return
2824	}
2825	go func() {
2826		s := dataDir + "/views/local.css"
2827		for {
2828			err := watcher.WatchFile(s)
2829			if err != nil {
2830				break
2831			}
2832			err = watcher.WaitForChange()
2833			if err != nil {
2834				dlog.Printf("can't wait: %s", err)
2835				break
2836			}
2837			dlog.Printf("local.css changed")
2838			delete(savedassetparams, s)
2839			savedassetparams[s] = getassetparam(s)
2840		}
2841	}()
2842}
2843
2844var usefcgi bool
2845
2846func serve() {
2847	db := opendatabase()
2848	login.Init(login.InitArgs{Db: db, Logger: ilog, Insecure: develMode, SameSiteStrict: !develMode})
2849
2850	listener, err := openListener()
2851	if err != nil {
2852		elog.Fatal(err)
2853	}
2854	runBackendServer()
2855	go enditall()
2856	go redeliverator()
2857	go tracker()
2858	go syndicator()
2859	go bgmonitor()
2860	go qotd()
2861	loadLingo()
2862	emuinit()
2863
2864	var toload []string
2865	dents, _ := os.ReadDir(viewDir + "/views")
2866	for _, dent := range dents {
2867		name := dent.Name()
2868		if strings.HasSuffix(name, ".html") {
2869			toload = append(toload, viewDir+"/views/"+name)
2870		}
2871	}
2872
2873	readviews = templates.Load(develMode, toload...)
2874	if !develMode {
2875		assets := []string{
2876			viewDir + "/views/style.css",
2877			dataDir + "/views/local.css",
2878			viewDir + "/views/honkpage.js",
2879			viewDir + "/views/misc.js",
2880			dataDir + "/views/local.js",
2881		}
2882		for _, s := range assets {
2883			savedassetparams[s] = getassetparam(s)
2884		}
2885		loadAvatarColors()
2886	}
2887	startWatcher()
2888
2889	securitizeweb()
2890
2891	mux := mux.NewRouter()
2892	mux.Use(addcspheaders)
2893	mux.Use(login.Checker)
2894
2895	mux.Handle("/api", login.TokenRequired(http.HandlerFunc(apihandler)))
2896
2897	posters := mux.Methods("POST").Subrouter()
2898	getters := mux.Methods("GET").Subrouter()
2899
2900	getters.HandleFunc("/", homepage)
2901	getters.HandleFunc("/home", homepage)
2902	getters.HandleFunc("/front", homepage)
2903	getters.HandleFunc("/events", homepage)
2904	getters.HandleFunc("/robots.txt", nomoroboto)
2905	getters.HandleFunc("/rss", showrss)
2906	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}", showuser)
2907	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}.json", showuser)
2908	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/"+honkSep+"/{xid:[\\pL[:digit:]]+}", showonehonk)
2909	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/"+honkSep+"/{xid:[\\pL[:digit:]]+}.json", showonehonk)
2910	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/rss", showrss)
2911	posters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/inbox", inbox)
2912	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/outbox", outbox)
2913	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/followers", emptiness)
2914	getters.HandleFunc("/"+userSep+"/{name:[\\pL[:digit:]]+}/following", emptiness)
2915	getters.HandleFunc("/a", avatate)
2916	getters.HandleFunc("/o", thelistingoftheontologies)
2917	getters.HandleFunc("/o/{name:.+}", showontology)
2918	getters.HandleFunc("/d/{xid:[\\pL[:digit:].]+}", servefile)
2919	getters.HandleFunc("/emu/{emu:[^.]*[^/]+}", serveemu)
2920	getters.HandleFunc("/meme/{meme:[^.]*[^/]+}", servememe)
2921	getters.HandleFunc("/.well-known/webfinger", fingerlicker)
2922
2923	getters.HandleFunc("/flag/{code:.+}", showflag)
2924
2925	getters.HandleFunc("/server", serveractor)
2926	posters.HandleFunc("/server/inbox", serverinbox)
2927	posters.HandleFunc("/inbox", serverinbox)
2928
2929	posters.HandleFunc("/csp-violation", fiveoh)
2930
2931	getters.HandleFunc("/style.css", serveviewasset)
2932	getters.HandleFunc("/honkpage.js", serveviewasset)
2933	getters.HandleFunc("/misc.js", serveviewasset)
2934	getters.HandleFunc("/local.css", servedataasset)
2935	getters.HandleFunc("/local.js", servedataasset)
2936	getters.HandleFunc("/icon.png", servedataasset)
2937	getters.HandleFunc("/favicon.ico", servedataasset)
2938
2939	getters.HandleFunc("/about", servehtml)
2940	getters.HandleFunc("/login", servehtml)
2941	posters.HandleFunc("/dologin", login.LoginFunc)
2942	getters.HandleFunc("/logout", login.LogoutFunc)
2943	getters.HandleFunc("/help/{name:[\\pL[:digit:]_.-]+}", servehelp)
2944
2945	loggedin := mux.NewRoute().Subrouter()
2946	loggedin.Use(login.Required)
2947	loggedin.HandleFunc("/first", homepage)
2948	loggedin.HandleFunc("/chatter", showchatter)
2949	loggedin.Handle("/sendchonk", login.CSRFWrap("sendchonk", http.HandlerFunc(submitchonk)))
2950	loggedin.HandleFunc("/saved", homepage)
2951	loggedin.HandleFunc("/account", accountpage)
2952	loggedin.HandleFunc("/funzone", showfunzone)
2953	loggedin.HandleFunc("/chpass", dochpass)
2954	loggedin.HandleFunc("/atme", homepage)
2955	loggedin.HandleFunc("/longago", homepage)
2956	loggedin.HandleFunc("/hfcs", hfcspage)
2957	loggedin.HandleFunc("/xzone", xzone)
2958	loggedin.HandleFunc("/newhonk", newhonkpage)
2959	loggedin.HandleFunc("/edit", edithonkpage)
2960	loggedin.Handle("/honk", login.CSRFWrap("honkhonk", http.HandlerFunc(websubmithonk)))
2961	loggedin.Handle("/bonk", login.CSRFWrap("honkhonk", http.HandlerFunc(submitbonk)))
2962	loggedin.Handle("/zonkit", login.CSRFWrap("honkhonk", http.HandlerFunc(zonkit)))
2963	loggedin.Handle("/savehfcs", login.CSRFWrap("filter", http.HandlerFunc(savehfcs)))
2964	loggedin.Handle("/saveuser", login.CSRFWrap("saveuser", http.HandlerFunc(saveuser)))
2965	loggedin.Handle("/ximport", login.CSRFWrap("ximport", http.HandlerFunc(ximport)))
2966	loggedin.HandleFunc("/honkers", showhonkers)
2967	loggedin.HandleFunc("/h/{name:[\\pL[:digit:]_.-]+}", showhonker)
2968	loggedin.HandleFunc("/h", showhonker)
2969	loggedin.HandleFunc("/c/{name:[\\pL[:digit:]_.-]+}", showcombo)
2970	loggedin.HandleFunc("/c", showcombos)
2971	loggedin.HandleFunc("/t", showconvoy)
2972	loggedin.HandleFunc("/q", showsearch)
2973	loggedin.HandleFunc("/hydra", webhydra)
2974	loggedin.HandleFunc("/emus", showemus)
2975	loggedin.Handle("/submithonker", login.CSRFWrap("submithonker", http.HandlerFunc(websubmithonker)))
2976
2977	if usefcgi {
2978		err = fcgi.Serve(listener, mux)
2979	} else {
2980		err = http.Serve(listener, mux)
2981	}
2982	if err != nil && !errors.Is(err, net.ErrClosed) {
2983		elog.Printf("serve error: %s", err)
2984	}
2985	time.Sleep(15 * time.Second)
2986	elog.Printf("fell off the bottom")
2987}