activity.go (view raw)
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 "compress/gzip"
21 "crypto/rsa"
22 "database/sql"
23 "encoding/json"
24 "fmt"
25 "io"
26 "log"
27 "net/http"
28 "net/url"
29 "os"
30 "strconv"
31 "strings"
32 "sync"
33 "time"
34)
35
36func NewJunk() map[string]interface{} {
37 return make(map[string]interface{})
38}
39
40func WriteJunk(w io.Writer, j map[string]interface{}) error {
41 e := json.NewEncoder(w)
42 e.SetEscapeHTML(false)
43 e.SetIndent("", " ")
44 err := e.Encode(j)
45 return err
46}
47
48func ReadJunk(r io.Reader) (map[string]interface{}, error) {
49 decoder := json.NewDecoder(r)
50 var j map[string]interface{}
51 err := decoder.Decode(&j)
52 if err != nil {
53 return nil, err
54 }
55 return j, nil
56}
57
58var theonetruename = `application/ld+json; profile="https://www.w3.org/ns/activitystreams"`
59var thefakename = `application/activity+json`
60var falsenames = []string{
61 `application/ld+json`,
62 `application/activity+json`,
63}
64var itiswhatitis = "https://www.w3.org/ns/activitystreams"
65var thewholeworld = "https://www.w3.org/ns/activitystreams#Public"
66
67func friendorfoe(ct string) bool {
68 ct = strings.ToLower(ct)
69 for _, at := range falsenames {
70 if strings.HasPrefix(ct, at) {
71 return true
72 }
73 }
74 return false
75}
76
77func PostJunk(keyname string, key *rsa.PrivateKey, url string, j map[string]interface{}) error {
78 var buf bytes.Buffer
79 WriteJunk(&buf, j)
80 return PostMsg(keyname, key, url, buf.Bytes())
81}
82
83func PostMsg(keyname string, key *rsa.PrivateKey, url string, msg []byte) error {
84 client := http.DefaultClient
85 req, err := http.NewRequest("POST", url, bytes.NewReader(msg))
86 if err != nil {
87 return err
88 }
89 req.Header.Set("Content-Type", theonetruename)
90 zig(keyname, key, req, msg)
91 resp, err := client.Do(req)
92 if err != nil {
93 return err
94 }
95 resp.Body.Close()
96 switch resp.StatusCode {
97 case 200:
98 case 201:
99 case 202:
100 default:
101 return fmt.Errorf("http post status: %d", resp.StatusCode)
102 }
103 log.Printf("successful post: %s %d", url, resp.StatusCode)
104 return nil
105}
106
107type gzCloser struct {
108 r *gzip.Reader
109 under io.ReadCloser
110}
111
112func (gz *gzCloser) Read(p []byte) (int, error) {
113 return gz.r.Read(p)
114}
115
116func (gz *gzCloser) Close() error {
117 defer gz.under.Close()
118 return gz.r.Close()
119}
120
121func GetJunk(url string) (map[string]interface{}, error) {
122 client := http.DefaultClient
123 req, err := http.NewRequest("GET", url, nil)
124 if err != nil {
125 return nil, err
126 }
127 at := thefakename
128 if strings.Contains(url, ".well-known/webfinger?resource") {
129 at = "application/jrd+json"
130 }
131 req.Header.Set("Accept", at)
132 req.Header.Set("Accept-Encoding", "gzip")
133 resp, err := client.Do(req)
134 if err != nil {
135 return nil, err
136 }
137 if resp.StatusCode != 200 {
138 resp.Body.Close()
139 return nil, fmt.Errorf("http get status: %d", resp.StatusCode)
140 }
141 if strings.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") {
142 gz, err := gzip.NewReader(resp.Body)
143 if err != nil {
144 resp.Body.Close()
145 return nil, err
146 }
147 resp.Body = &gzCloser{r: gz, under: resp.Body}
148 }
149 defer resp.Body.Close()
150 j, err := ReadJunk(resp.Body)
151 return j, err
152}
153
154func jsonfindinterface(ii interface{}, keys []string) interface{} {
155 for _, key := range keys {
156 idx, err := strconv.Atoi(key)
157 if err == nil {
158 m := ii.([]interface{})
159 if idx >= len(m) {
160 return nil
161 }
162 ii = m[idx]
163 } else {
164 m := ii.(map[string]interface{})
165 ii = m[key]
166 if ii == nil {
167 return nil
168 }
169 }
170 }
171 return ii
172}
173func jsonfindstring(j interface{}, keys []string) (string, bool) {
174 s, ok := jsonfindinterface(j, keys).(string)
175 return s, ok
176}
177func jsonfindarray(j interface{}, keys []string) ([]interface{}, bool) {
178 a, ok := jsonfindinterface(j, keys).([]interface{})
179 return a, ok
180}
181func jsonfindmap(j interface{}, keys []string) (map[string]interface{}, bool) {
182 m, ok := jsonfindinterface(j, keys).(map[string]interface{})
183 return m, ok
184}
185func jsongetstring(j interface{}, key string) (string, bool) {
186 return jsonfindstring(j, []string{key})
187}
188func jsongetarray(j interface{}, key string) ([]interface{}, bool) {
189 return jsonfindarray(j, []string{key})
190}
191func jsongetmap(j interface{}, key string) (map[string]interface{}, bool) {
192 return jsonfindmap(j, []string{key})
193}
194
195func savedonk(url string, name, media string) *Donk {
196 var donk Donk
197 row := stmtFindFile.QueryRow(url)
198 err := row.Scan(&donk.FileID)
199 if err == nil {
200 return &donk
201 }
202 log.Printf("saving donk: %s", url)
203 if err != nil && err != sql.ErrNoRows {
204 log.Printf("error querying: %s", err)
205 }
206 resp, err := http.Get(url)
207 if err != nil {
208 log.Printf("error fetching %s: %s", url, err)
209 return nil
210 }
211 defer resp.Body.Close()
212 if resp.StatusCode != 200 {
213 return nil
214 }
215 var buf bytes.Buffer
216 io.Copy(&buf, resp.Body)
217
218 xid := xfiltrate()
219
220 res, err := stmtSaveFile.Exec(xid, name, url, media, buf.Bytes())
221 if err != nil {
222 log.Printf("error saving file %s: %s", url, err)
223 return nil
224 }
225 donk.FileID, _ = res.LastInsertId()
226 return &donk
227}
228
229func needxonk(user *WhatAbout, x *Honk) bool {
230 if strings.HasPrefix(x.XID, user.URL+"/h/") {
231 return false
232 }
233 if x.What == "eradicate" {
234 return true
235 }
236 row := stmtFindXonk.QueryRow(user.ID, x.XID)
237 err := row.Scan(&x.ID)
238 if err == nil {
239 return false
240 }
241 if err != sql.ErrNoRows {
242 log.Printf("err querying xonk: %s", err)
243 }
244 return true
245}
246
247func savexonk(user *WhatAbout, x *Honk) {
248 if x.What == "eradicate" {
249 log.Printf("eradicating %s by %s", x.RID, x.Honker)
250 _, err := stmtDeleteHonk.Exec(x.RID, x.Honker, user.ID)
251 if err != nil {
252 log.Printf("error eradicating: %s", err)
253 }
254 return
255 }
256 dt := x.Date.UTC().Format(dbtimeformat)
257 aud := strings.Join(x.Audience, " ")
258 whofore := 0
259 if strings.Contains(aud, user.URL) {
260 whofore = 1
261 }
262 res, err := stmtSaveHonk.Exec(x.UserID, x.What, x.Honker, x.XID, x.RID, dt, x.URL, aud,
263 x.Noise, x.Convoy, whofore)
264 if err != nil {
265 log.Printf("err saving xonk: %s", err)
266 return
267 }
268 x.ID, _ = res.LastInsertId()
269 for _, d := range x.Donks {
270 _, err = stmtSaveDonk.Exec(x.ID, d.FileID)
271 if err != nil {
272 log.Printf("err saving donk: %s", err)
273 return
274 }
275 }
276}
277
278type Box struct {
279 In string
280 Out string
281 Shared string
282}
283
284var boxofboxes = make(map[string]*Box)
285var boxlock sync.Mutex
286var boxinglock sync.Mutex
287
288func getboxes(ident string) (*Box, error) {
289 boxlock.Lock()
290 b, ok := boxofboxes[ident]
291 boxlock.Unlock()
292 if ok {
293 return b, nil
294 }
295
296 boxinglock.Lock()
297 defer boxinglock.Unlock()
298
299 boxlock.Lock()
300 b, ok = boxofboxes[ident]
301 boxlock.Unlock()
302 if ok {
303 return b, nil
304 }
305
306 db := opendatabase()
307
308 row := db.QueryRow("select ibox, obox, sbox from xonkers where xid = ?", ident)
309 b = &Box{}
310 err := row.Scan(&b.In, &b.Out, &b.Shared)
311 if err != nil {
312 j, err := GetJunk(ident)
313 if err != nil {
314 return nil, err
315 }
316 inbox, _ := jsongetstring(j, "inbox")
317 outbox, _ := jsongetstring(j, "outbox")
318 sbox, _ := jsonfindstring(j, []string{"endpoints", "sharedInbox"})
319 b = &Box{In: inbox, Out: outbox, Shared: sbox}
320 if inbox != "" {
321 db.Exec("insert into xonkers (xid, ibox, obox, sbox, pubkey) values (?, ?, ?, ?, ?)",
322 ident, inbox, outbox, sbox, "")
323 }
324 }
325 boxlock.Lock()
326 boxofboxes[ident] = b
327 boxlock.Unlock()
328 return b, nil
329}
330
331func peeppeep() {
332 user, _ := butwhatabout("htest")
333 honkers := gethonkers(user.ID)
334 for _, f := range honkers {
335 if f.Flavor != "peep" {
336 continue
337 }
338 log.Printf("getting updates: %s", f.XID)
339 box, err := getboxes(f.XID)
340 if err != nil {
341 log.Printf("error getting outbox: %s", err)
342 continue
343 }
344 log.Printf("getting outbox")
345 j, err := GetJunk(box.Out)
346 if err != nil {
347 log.Printf("err: %s", err)
348 continue
349 }
350 t, _ := jsongetstring(j, "type")
351 if t == "OrderedCollection" {
352 items, _ := jsongetarray(j, "orderedItems")
353 if items == nil {
354 page1, _ := jsongetstring(j, "first")
355 j, err = GetJunk(page1)
356 if err != nil {
357 log.Printf("err: %s", err)
358 continue
359 }
360 items, _ = jsongetarray(j, "orderedItems")
361 }
362
363 for _, item := range items {
364 xonk := xonkxonk(item)
365 if xonk != nil && needxonk(user, xonk) {
366 xonk.UserID = user.ID
367 savexonk(user, xonk)
368 }
369 }
370 }
371 }
372}
373
374func whosthere(xid string) ([]string, string) {
375 obj, err := GetJunk(xid)
376 if err != nil {
377 log.Printf("error getting remote xonk: %s", err)
378 return nil, ""
379 }
380 convoy, _ := jsongetstring(obj, "context")
381 if convoy == "" {
382 convoy, _ = jsongetstring(obj, "conversation")
383 }
384 return newphone(nil, obj), convoy
385}
386
387func newphone(a []string, obj map[string]interface{}) []string {
388 for _, addr := range []string{"to", "cc", "attributedTo"} {
389 who, _ := jsongetstring(obj, addr)
390 if who != "" {
391 a = append(a, who)
392 }
393 whos, _ := jsongetarray(obj, addr)
394 for _, w := range whos {
395 who, _ := w.(string)
396 if who != "" {
397 a = append(a, who)
398 }
399 }
400 }
401 return a
402}
403
404func xonkxonk(item interface{}) *Honk {
405 // id, _ := jsongetstring(item, "id")
406 what, _ := jsongetstring(item, "type")
407 dt, _ := jsongetstring(item, "published")
408
409 var audience []string
410 var err error
411 var xid, rid, url, content, convoy string
412 var obj map[string]interface{}
413 switch what {
414 case "Announce":
415 xid, _ = jsongetstring(item, "object")
416 log.Printf("getting bonk: %s", xid)
417 obj, err = GetJunk(xid)
418 if err != nil {
419 log.Printf("error regetting: %s", err)
420 }
421 what = "bonk"
422 case "Create":
423 obj, _ = jsongetmap(item, "object")
424 what = "honk"
425 case "Delete":
426 obj, _ = jsongetmap(item, "object")
427 rid, _ = jsongetstring(item, "object")
428 what = "eradicate"
429 default:
430 log.Printf("unknown activity: %s", what)
431 return nil
432 }
433 who, _ := jsongetstring(item, "actor")
434
435 var xonk Honk
436 if obj != nil {
437 ot, _ := jsongetstring(obj, "type")
438 url, _ = jsongetstring(obj, "url")
439 if ot == "Note" || ot == "Article" {
440 audience = newphone(audience, obj)
441 xid, _ = jsongetstring(obj, "id")
442 content, _ = jsongetstring(obj, "content")
443 summary, _ := jsongetstring(obj, "summary")
444 if !strings.HasPrefix(content, "<p>") {
445 content = "<p>" + content
446 }
447 if summary != "" {
448 content = "<p>summary: " + summary + content
449 }
450 rid, _ = jsongetstring(obj, "inReplyTo")
451 convoy, _ = jsongetstring(obj, "context")
452 if convoy == "" {
453 convoy, _ = jsongetstring(obj, "conversation")
454 }
455 if what == "honk" && rid != "" {
456 what = "tonk"
457 }
458 }
459 if ot == "Tombstone" {
460 rid, _ = jsongetstring(obj, "id")
461 }
462 atts, _ := jsongetarray(obj, "attachment")
463 for _, att := range atts {
464 at, _ := jsongetstring(att, "type")
465 mt, _ := jsongetstring(att, "mediaType")
466 u, _ := jsongetstring(att, "url")
467 name, _ := jsongetstring(att, "name")
468 if at == "Document" {
469 mt = strings.ToLower(mt)
470 log.Printf("attachment: %s %s", mt, u)
471 if mt == "image/jpeg" || mt == "image/png" ||
472 mt == "image/gif" || mt == "text/plain" {
473 donk := savedonk(u, name, mt)
474 if donk != nil {
475 xonk.Donks = append(xonk.Donks, donk)
476 }
477 }
478 }
479 }
480 tags, _ := jsongetarray(obj, "tag")
481 for _, tag := range tags {
482 tt, _ := jsongetstring(tag, "type")
483 name, _ := jsongetstring(tag, "name")
484 if tt == "Emoji" {
485 icon, _ := jsongetmap(tag, "icon")
486 mt, _ := jsongetstring(icon, "mediaType")
487 u, _ := jsongetstring(icon, "url")
488 donk := savedonk(u, name, mt)
489 if donk != nil {
490 xonk.Donks = append(xonk.Donks, donk)
491 }
492 }
493 }
494 }
495 audience = append(audience, who)
496
497 audience = oneofakind(audience)
498
499 xonk.What = what
500 xonk.Honker = who
501 xonk.XID = xid
502 xonk.RID = rid
503 xonk.Date, _ = time.Parse(time.RFC3339, dt)
504 xonk.URL = url
505 xonk.Noise = content
506 xonk.Audience = audience
507 xonk.Convoy = convoy
508
509 return &xonk
510}
511
512func rubadubdub(user *WhatAbout, req map[string]interface{}) {
513 xid, _ := jsongetstring(req, "id")
514 reqactor, _ := jsongetstring(req, "actor")
515 j := NewJunk()
516 j["@context"] = itiswhatitis
517 j["id"] = user.URL + "/dub/" + xid
518 j["type"] = "Accept"
519 j["actor"] = user.URL
520 j["to"] = reqactor
521 j["published"] = time.Now().UTC().Format(time.RFC3339)
522 j["object"] = req
523
524 WriteJunk(os.Stdout, j)
525
526 actor, _ := jsongetstring(req, "actor")
527 box, err := getboxes(actor)
528 if err != nil {
529 log.Printf("can't get dub box: %s", err)
530 return
531 }
532 keyname, key := ziggy(user.Name)
533 err = PostJunk(keyname, key, box.In, j)
534 if err != nil {
535 log.Printf("can't rub a dub: %s", err)
536 return
537 }
538 stmtSaveDub.Exec(user.ID, actor, actor, "dub")
539}
540
541func subsub(user *WhatAbout, xid string) {
542 j := NewJunk()
543 j["@context"] = itiswhatitis
544 j["id"] = user.URL + "/sub/" + xid
545 j["type"] = "Follow"
546 j["actor"] = user.URL
547 j["to"] = xid
548 j["object"] = xid
549 j["published"] = time.Now().UTC().Format(time.RFC3339)
550
551 box, err := getboxes(xid)
552 if err != nil {
553 log.Printf("can't send follow: %s", err)
554 return
555 }
556 WriteJunk(os.Stdout, j)
557 keyname, key := ziggy(user.Name)
558 err = PostJunk(keyname, key, box.In, j)
559 if err != nil {
560 log.Printf("failed to subsub: %s", err)
561 }
562}
563
564func jonkjonk(user *WhatAbout, h *Honk) (map[string]interface{}, map[string]interface{}) {
565 dt := h.Date.Format(time.RFC3339)
566 var jo map[string]interface{}
567 j := NewJunk()
568 j["id"] = user.URL + "/" + h.What + "/" + h.XID
569 j["actor"] = user.URL
570 j["published"] = dt
571 j["to"] = h.Audience[0]
572 if len(h.Audience) > 1 {
573 j["cc"] = h.Audience[1:]
574 }
575
576 switch h.What {
577 case "zonk":
578 fallthrough
579 case "tonk":
580 fallthrough
581 case "honk":
582 j["type"] = "Create"
583 if h.What == "zonk" {
584 j["type"] = "Delete"
585 }
586
587 jo = NewJunk()
588 jo["id"] = user.URL + "/h/" + h.XID
589 jo["type"] = "Note"
590 if h.What == "zonk" {
591 jo["type"] = "Tombstone"
592 }
593 jo["published"] = dt
594 jo["url"] = user.URL + "/h/" + h.XID
595 jo["attributedTo"] = user.URL
596 if h.RID != "" {
597 jo["inReplyTo"] = h.RID
598 }
599 if h.Convoy != "" {
600 jo["context"] = h.Convoy
601 jo["conversation"] = h.Convoy
602 }
603 jo["to"] = h.Audience[0]
604 if len(h.Audience) > 1 {
605 jo["cc"] = h.Audience[1:]
606 }
607 jo["content"] = mentionize(h.Noise)
608 jo["summary"] = nil
609 var tags []interface{}
610 g := bunchofgrapes(h.Noise)
611 for _, m := range g {
612 t := NewJunk()
613 t["type"] = "Mention"
614 t["name"] = m.who
615 t["href"] = m.where
616 tags = append(tags, t)
617 }
618 herd := herdofemus(h.Noise)
619 for _, e := range herd {
620 t := NewJunk()
621 t["id"] = e.ID
622 t["type"] = "Emoji"
623 t["name"] = e.Name
624 i := NewJunk()
625 i["type"] = "Image"
626 i["mediaType"] = "image/png"
627 i["url"] = e.ID
628 t["icon"] = i
629 tags = append(tags, t)
630 }
631 if len(tags) > 0 {
632 jo["tag"] = tags
633 }
634 var atts []interface{}
635 for _, d := range h.Donks {
636 if re_emus.MatchString(d.Name) {
637 continue
638 }
639 jd := NewJunk()
640 jd["mediaType"] = d.Media
641 jd["name"] = d.Name
642 jd["type"] = "Document"
643 jd["url"] = d.URL
644 atts = append(atts, jd)
645 }
646 if len(atts) > 0 {
647 jo["attachment"] = atts
648 }
649 j["object"] = jo
650 case "bonk":
651 j["type"] = "Announce"
652 j["object"] = h.XID
653 }
654
655 return j, jo
656}
657
658func honkworldwide(user *WhatAbout, honk *Honk) {
659 jonk, _ := jonkjonk(user, honk)
660 jonk["@context"] = itiswhatitis
661 var buf bytes.Buffer
662 WriteJunk(&buf, jonk)
663 msg := buf.Bytes()
664
665 rcpts := make(map[string]bool)
666 for _, a := range honk.Audience {
667 if a != thewholeworld && a != user.URL && !strings.HasSuffix(a, "/followers") {
668 box, _ := getboxes(a)
669 if box != nil && box.Shared != "" {
670 rcpts["%"+box.Shared] = true
671 } else {
672 rcpts[a] = true
673 }
674 }
675 }
676 for _, f := range getdubs(user.ID) {
677 box, _ := getboxes(f.XID)
678 if box != nil && box.Shared != "" {
679 rcpts["%"+box.Shared] = true
680 } else {
681 rcpts[f.XID] = true
682 }
683 }
684 for a := range rcpts {
685 go deliverate(0, user.Name, a, msg)
686 }
687}
688
689func asjonker(user *WhatAbout) map[string]interface{} {
690 about := obfusbreak(user.About)
691
692 j := NewJunk()
693 j["@context"] = itiswhatitis
694 j["id"] = user.URL
695 j["type"] = "Person"
696 j["inbox"] = user.URL + "/inbox"
697 j["outbox"] = user.URL + "/outbox"
698 j["followers"] = user.URL + "/followers"
699 j["following"] = user.URL + "/following"
700 j["name"] = user.Display
701 j["preferredUsername"] = user.Name
702 j["summary"] = about
703 j["url"] = user.URL
704 a := NewJunk()
705 a["type"] = "icon"
706 a["mediaType"] = "image/png"
707 a["url"] = fmt.Sprintf("https://%s/a?a=%s", serverName, url.QueryEscape(user.URL))
708 j["icon"] = a
709 k := NewJunk()
710 k["id"] = user.URL + "#key"
711 k["owner"] = user.URL
712 k["publicKeyPem"] = user.Key
713 j["publicKey"] = k
714
715 return j
716}