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(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 res, err := stmtSaveHonk.Exec(x.UserID, x.What, x.Honker, x.XID, x.RID, dt, x.URL, aud, x.Noise)
258 if err != nil {
259 log.Printf("err saving xonk: %s", err)
260 return
261 }
262 x.ID, _ = res.LastInsertId()
263 for _, d := range x.Donks {
264 _, err = stmtSaveDonk.Exec(x.ID, d.FileID)
265 if err != nil {
266 log.Printf("err saving donk: %s", err)
267 return
268 }
269 }
270}
271
272type Box struct {
273 In string
274 Out string
275 Shared string
276}
277
278var boxofboxes = make(map[string]*Box)
279var boxlock sync.Mutex
280var boxinglock sync.Mutex
281
282func getboxes(ident string) (*Box, error) {
283 boxlock.Lock()
284 b, ok := boxofboxes[ident]
285 boxlock.Unlock()
286 if ok {
287 return b, nil
288 }
289
290 boxinglock.Lock()
291 defer boxinglock.Unlock()
292
293 boxlock.Lock()
294 b, ok = boxofboxes[ident]
295 boxlock.Unlock()
296 if ok {
297 return b, nil
298 }
299
300 j, err := GetJunk(ident)
301 if err != nil {
302 return nil, err
303 }
304 inbox, _ := jsongetstring(j, "inbox")
305 outbox, _ := jsongetstring(j, "outbox")
306 sbox, _ := jsonfindstring(j, []string{"endpoints", "sharedInbox"})
307 b = &Box{In: inbox, Out: outbox, Shared: sbox}
308 boxlock.Lock()
309 boxofboxes[ident] = b
310 boxlock.Unlock()
311 return b, nil
312}
313
314func peeppeep() {
315 user, _ := butwhatabout("")
316 honkers := gethonkers(user.ID)
317 for _, f := range honkers {
318 if f.Flavor != "peep" {
319 continue
320 }
321 log.Printf("getting updates: %s", f.XID)
322 box, err := getboxes(f.XID)
323 if err != nil {
324 log.Printf("error getting outbox: %s", err)
325 continue
326 }
327 log.Printf("getting outbox")
328 j, err := GetJunk(box.Out)
329 if err != nil {
330 log.Printf("err: %s", err)
331 continue
332 }
333 t, _ := jsongetstring(j, "type")
334 if t == "OrderedCollection" {
335 items, _ := jsongetarray(j, "orderedItems")
336 if items == nil {
337 page1, _ := jsongetstring(j, "first")
338 j, err = GetJunk(page1)
339 if err != nil {
340 log.Printf("err: %s", err)
341 continue
342 }
343 items, _ = jsongetarray(j, "orderedItems")
344 }
345
346 for _, item := range items {
347 xonk := xonkxonk(item)
348 if xonk != nil && needxonk(user, xonk) {
349 xonk.UserID = user.ID
350 savexonk(xonk)
351 }
352 }
353 }
354 }
355}
356
357func whosthere(xid string) []string {
358 obj, err := GetJunk(xid)
359 if err != nil {
360 log.Printf("error getting remote xonk: %s", err)
361 return nil
362 }
363 return newphone(nil, obj)
364}
365
366func newphone(a []string, obj map[string]interface{}) []string {
367 for _, addr := range []string{"to", "cc", "attributedTo"} {
368 who, _ := jsongetstring(obj, addr)
369 if who != "" {
370 a = append(a, who)
371 }
372 whos, _ := jsongetarray(obj, addr)
373 for _, w := range whos {
374 who, _ := w.(string)
375 if who != "" {
376 a = append(a, who)
377 }
378 }
379 }
380 return a
381}
382
383func xonkxonk(item interface{}) *Honk {
384 // id, _ := jsongetstring(item, "id")
385 what, _ := jsongetstring(item, "type")
386 dt, _ := jsongetstring(item, "published")
387
388 var audience []string
389 var err error
390 var xid, rid, url, content string
391 var obj map[string]interface{}
392 switch what {
393 case "Announce":
394 xid, _ = jsongetstring(item, "object")
395 log.Printf("getting bonk: %s", xid)
396 obj, err = GetJunk(xid)
397 if err != nil {
398 log.Printf("error regetting: %s", err)
399 }
400 what = "bonk"
401 case "Create":
402 obj, _ = jsongetmap(item, "object")
403 what = "honk"
404 case "Delete":
405 obj, _ = jsongetmap(item, "object")
406 rid, _ = jsongetstring(item, "object")
407 what = "eradicate"
408 default:
409 log.Printf("unknown activity: %s", what)
410 return nil
411 }
412 who, _ := jsongetstring(item, "actor")
413
414 var xonk Honk
415 if obj != nil {
416 ot, _ := jsongetstring(obj, "type")
417 url, _ = jsongetstring(obj, "url")
418 if ot == "Note" || ot == "Article" {
419 audience = newphone(audience, obj)
420 xid, _ = jsongetstring(obj, "id")
421 content, _ = jsongetstring(obj, "content")
422 summary, _ := jsongetstring(obj, "summary")
423 if summary != "" {
424 content = "<p>summary: " + summary + content
425 }
426 rid, _ = jsongetstring(obj, "inReplyTo")
427 if what == "honk" && rid != "" {
428 what = "tonk"
429 }
430 }
431 if ot == "Tombstone" {
432 rid, _ = jsongetstring(obj, "id")
433 }
434 atts, _ := jsongetarray(obj, "attachment")
435 for _, att := range atts {
436 at, _ := jsongetstring(att, "type")
437 mt, _ := jsongetstring(att, "mediaType")
438 u, _ := jsongetstring(att, "url")
439 name, _ := jsongetstring(att, "name")
440 if at == "Document" {
441 mt = strings.ToLower(mt)
442 log.Printf("attachment: %s %s", mt, u)
443 if mt == "image/jpeg" || mt == "image/png" ||
444 mt == "image/gif" || mt == "text/plain" {
445 donk := savedonk(u, name, mt)
446 if donk != nil {
447 xonk.Donks = append(xonk.Donks, donk)
448 }
449 }
450 }
451 }
452 tags, _ := jsongetarray(obj, "tag")
453 for _, tag := range tags {
454 tt, _ := jsongetstring(tag, "type")
455 name, _ := jsongetstring(tag, "name")
456 if tt == "Emoji" {
457 icon, _ := jsongetmap(tag, "icon")
458 mt, _ := jsongetstring(icon, "mediaType")
459 u, _ := jsongetstring(icon, "url")
460 donk := savedonk(u, name, mt)
461 if donk != nil {
462 xonk.Donks = append(xonk.Donks, donk)
463 }
464 }
465 }
466 }
467 audience = append(audience, who)
468
469 audience = oneofakind(audience)
470
471 xonk.What = what
472 xonk.Honker = who
473 xonk.XID = xid
474 xonk.RID = rid
475 xonk.Date, _ = time.Parse(time.RFC3339, dt)
476 xonk.URL = url
477 xonk.Noise = content
478 xonk.Audience = audience
479
480 return &xonk
481}
482
483func rubadubdub(user *WhatAbout, req map[string]interface{}) {
484 xid, _ := jsongetstring(req, "id")
485 reqactor, _ := jsongetstring(req, "actor")
486 j := NewJunk()
487 j["@context"] = itiswhatitis
488 j["id"] = user.URL + "/dub/" + xid
489 j["type"] = "Accept"
490 j["actor"] = user.URL
491 j["to"] = reqactor
492 j["published"] = time.Now().UTC().Format(time.RFC3339)
493 j["object"] = req
494
495 WriteJunk(os.Stdout, j)
496
497 actor, _ := jsongetstring(req, "actor")
498 box, err := getboxes(actor)
499 if err != nil {
500 log.Printf("can't get dub box: %s", err)
501 return
502 }
503 keyname, key := ziggy(user.Name)
504 err = PostJunk(keyname, key, box.In, j)
505 if err != nil {
506 log.Printf("can't rub a dub: %s", err)
507 return
508 }
509 stmtSaveDub.Exec(user.ID, actor, actor, "dub")
510}
511
512func subsub(user *WhatAbout, xid string) {
513 j := NewJunk()
514 j["@context"] = itiswhatitis
515 j["id"] = user.URL + "/sub/" + xid
516 j["type"] = "Follow"
517 j["actor"] = user.URL
518 j["to"] = xid
519 j["object"] = xid
520 j["published"] = time.Now().UTC().Format(time.RFC3339)
521
522 box, err := getboxes(xid)
523 if err != nil {
524 log.Printf("can't send follow: %s", err)
525 return
526 }
527 WriteJunk(os.Stdout, j)
528 keyname, key := ziggy(user.Name)
529 err = PostJunk(keyname, key, box.In, j)
530 if err != nil {
531 log.Printf("failed to subsub: %s", err)
532 }
533}
534
535func jonkjonk(user *WhatAbout, h *Honk) (map[string]interface{}, map[string]interface{}) {
536 dt := h.Date.Format(time.RFC3339)
537 var jo map[string]interface{}
538 j := NewJunk()
539 j["id"] = user.URL + "/" + h.What + "/" + h.XID
540 j["actor"] = user.URL
541 j["published"] = dt
542 j["to"] = h.Audience[0]
543 if len(h.Audience) > 1 {
544 j["cc"] = h.Audience[1:]
545 }
546
547 switch h.What {
548 case "zonk":
549 fallthrough
550 case "tonk":
551 fallthrough
552 case "honk":
553 j["type"] = "Create"
554 if h.What == "zonk" {
555 j["type"] = "Delete"
556 }
557
558 jo = NewJunk()
559 jo["id"] = user.URL + "/h/" + h.XID
560 jo["type"] = "Note"
561 if h.What == "zonk" {
562 jo["type"] = "Tombstone"
563 }
564 jo["published"] = dt
565 jo["url"] = user.URL + "/h/" + h.XID
566 jo["attributedTo"] = user.URL
567 if h.RID != "" {
568 jo["inReplyTo"] = h.RID
569 }
570 jo["to"] = h.Audience[0]
571 if len(h.Audience) > 1 {
572 jo["cc"] = h.Audience[1:]
573 }
574 jo["content"] = h.Noise
575 jo["summary"] = nil
576 var tags []interface{}
577 g := bunchofgrapes(h.Noise)
578 for _, m := range g {
579 t := NewJunk()
580 t["type"] = "Mention"
581 t["name"] = m.who
582 t["href"] = m.where
583 tags = append(tags, t)
584 }
585 herd := herdofemus(h.Noise)
586 for _, e := range herd {
587 t := NewJunk()
588 t["id"] = e.ID
589 t["type"] = "Emoji"
590 t["name"] = e.Name
591 i := NewJunk()
592 i["type"] = "Image"
593 i["mediaType"] = "image/png"
594 i["url"] = e.ID
595 t["icon"] = i
596 tags = append(tags, t)
597 }
598 if len(tags) > 0 {
599 jo["tag"] = tags
600 }
601 var atts []interface{}
602 for _, d := range h.Donks {
603 if re_emus.MatchString(d.Name) {
604 continue
605 }
606 jd := NewJunk()
607 jd["mediaType"] = d.Media
608 jd["name"] = d.Name
609 jd["type"] = "Document"
610 jd["url"] = d.URL
611 atts = append(atts, jd)
612 }
613 if len(atts) > 0 {
614 jo["attachment"] = atts
615 }
616 j["object"] = jo
617 case "bonk":
618 j["type"] = "Announce"
619 j["object"] = h.XID
620 }
621
622 return j, jo
623}
624
625func honkworldwide(user *WhatAbout, honk *Honk) {
626 jonk, _ := jonkjonk(user, honk)
627 jonk["@context"] = itiswhatitis
628 var buf bytes.Buffer
629 WriteJunk(&buf, jonk)
630 msg := buf.Bytes()
631
632 rcpts := make(map[string]bool)
633 for _, a := range honk.Audience {
634 if a != thewholeworld && a != user.URL && !strings.HasSuffix(a, "/followers") {
635 box, _ := getboxes(a)
636 if box != nil && box.Shared != "" {
637 rcpts["%"+box.Shared] = true
638 } else {
639 rcpts[a] = true
640 }
641 }
642 }
643 for _, f := range getdubs(user.ID) {
644 box, _ := getboxes(f.XID)
645 if box != nil && box.Shared != "" {
646 rcpts["%"+box.Shared] = true
647 } else {
648 rcpts[f.XID] = true
649 }
650 }
651 for a := range rcpts {
652 go deliverate(0, user.Name, a, msg)
653 }
654}
655
656func asjonker(user *WhatAbout) map[string]interface{} {
657 about := obfusbreak(user.About)
658
659 j := NewJunk()
660 j["@context"] = itiswhatitis
661 j["id"] = user.URL
662 j["type"] = "Person"
663 j["inbox"] = user.URL + "/inbox"
664 j["outbox"] = user.URL + "/outbox"
665 j["name"] = user.Display
666 j["preferredUsername"] = user.Name
667 j["summary"] = about
668 j["url"] = user.URL
669 a := NewJunk()
670 a["type"] = "icon"
671 a["mediaType"] = "image/png"
672 a["url"] = fmt.Sprintf("https://%s/a?a=%s", serverName, url.QueryEscape(user.URL))
673 j["icon"] = a
674 k := NewJunk()
675 k["id"] = user.URL + "#key"
676 k["owner"] = user.URL
677 k["publicKeyPem"] = user.Key
678 j["publicKey"] = k
679
680 return j
681}