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