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 client := http.DefaultClient
78 var buf bytes.Buffer
79 WriteJunk(&buf, j)
80 req, err := http.NewRequest("POST", url, &buf)
81 if err != nil {
82 return err
83 }
84 req.Header.Set("Content-Type", theonetruename)
85 zig(keyname, key, req, buf.Bytes())
86 resp, err := client.Do(req)
87 if err != nil {
88 return err
89 }
90 if resp.StatusCode != 200 && resp.StatusCode != 202 {
91 resp.Body.Close()
92 return fmt.Errorf("http post status: %d", resp.StatusCode)
93 }
94 log.Printf("successful post: %s %d", url, resp.StatusCode)
95 return nil
96}
97
98type gzCloser struct {
99 r *gzip.Reader
100 under io.ReadCloser
101}
102
103func (gz *gzCloser) Read(p []byte) (int, error) {
104 return gz.r.Read(p)
105}
106
107func (gz *gzCloser) Close() error {
108 defer gz.under.Close()
109 return gz.r.Close()
110}
111
112func GetJunk(url string) (map[string]interface{}, error) {
113 client := http.DefaultClient
114 req, err := http.NewRequest("GET", url, nil)
115 if err != nil {
116 return nil, err
117 }
118 req.Header.Set("Accept", theonetruename)
119 req.Header.Set("Accept-Encoding", "gzip")
120 resp, err := client.Do(req)
121 if err != nil {
122 return nil, err
123 }
124 if resp.StatusCode != 200 {
125 resp.Body.Close()
126 return nil, fmt.Errorf("http get status: %d", resp.StatusCode)
127 }
128 if strings.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") {
129 gz, err := gzip.NewReader(resp.Body)
130 if err != nil {
131 resp.Body.Close()
132 return nil, err
133 }
134 resp.Body = &gzCloser{r: gz, under: resp.Body}
135 }
136 defer resp.Body.Close()
137 j, err := ReadJunk(resp.Body)
138 return j, err
139}
140
141func jsonfindinterface(ii interface{}, keys []string) interface{} {
142 for _, key := range keys {
143 idx, err := strconv.Atoi(key)
144 if err == nil {
145 m := ii.([]interface{})
146 if idx >= len(m) {
147 return nil
148 }
149 ii = m[idx]
150 } else {
151 m := ii.(map[string]interface{})
152 ii = m[key]
153 if ii == nil {
154 return nil
155 }
156 }
157 }
158 return ii
159}
160func jsonfindstring(j interface{}, keys []string) (string, bool) {
161 s, ok := jsonfindinterface(j, keys).(string)
162 return s, ok
163}
164func jsonfindarray(j interface{}, keys []string) ([]interface{}, bool) {
165 a, ok := jsonfindinterface(j, keys).([]interface{})
166 return a, ok
167}
168func jsonfindmap(j interface{}, keys []string) (map[string]interface{}, bool) {
169 m, ok := jsonfindinterface(j, keys).(map[string]interface{})
170 return m, ok
171}
172func jsongetstring(j interface{}, key string) (string, bool) {
173 return jsonfindstring(j, []string{key})
174}
175func jsongetarray(j interface{}, key string) ([]interface{}, bool) {
176 return jsonfindarray(j, []string{key})
177}
178func jsongetmap(j interface{}, key string) (map[string]interface{}, bool) {
179 return jsonfindmap(j, []string{key})
180}
181
182func savedonk(url string, name, media string) *Donk {
183 log.Printf("saving donk: %s", url)
184 var donk Donk
185 row := stmtFindFile.QueryRow(url)
186 err := row.Scan(&donk.FileID)
187 if err == nil {
188 return &donk
189 }
190 if err != nil && err != sql.ErrNoRows {
191 log.Printf("err querying: %s", err)
192 }
193 resp, err := http.Get(url)
194 if err != nil {
195 log.Printf("errer fetching %s: %s", url, err)
196 return nil
197 }
198 defer resp.Body.Close()
199 if resp.StatusCode != 200 {
200 return nil
201 }
202 var buf bytes.Buffer
203 io.Copy(&buf, resp.Body)
204
205 xid := xfiltrate()
206
207 res, err := stmtSaveFile.Exec(xid, name, url, media, buf.Bytes())
208 if err != nil {
209 log.Printf("error saving file %s: %s", url, err)
210 return nil
211 }
212 donk.FileID, _ = res.LastInsertId()
213 return &donk
214}
215
216func needxonk(userid int64, x *Honk) bool {
217 row := stmtFindXonk.QueryRow(userid, x.XID, x.What)
218 err := row.Scan(&x.ID)
219 if err == nil {
220 return false
221 }
222 if err != sql.ErrNoRows {
223 log.Printf("err querying xonk: %s", err)
224 }
225 return true
226}
227
228func savexonk(x *Honk) {
229 if x.What == "eradicate" {
230 log.Printf("eradicating %s by %s", x.RID, x.Honker)
231 _, err := stmtDeleteHonk.Exec(x.RID, x.Honker)
232 if err != nil {
233 log.Printf("error eradicating: %s", err)
234 }
235 return
236 }
237 dt := x.Date.UTC().Format(dbtimeformat)
238 aud := strings.Join(x.Audience, " ")
239 res, err := stmtSaveHonk.Exec(x.UserID, x.What, x.Honker, x.XID, x.RID, dt, x.URL, aud, x.Noise)
240 if err != nil {
241 log.Printf("err saving xonk: %s", err)
242 return
243 }
244 x.ID, _ = res.LastInsertId()
245 for _, d := range x.Donks {
246 _, err = stmtSaveDonk.Exec(x.ID, d.FileID)
247 if err != nil {
248 log.Printf("err saving donk: %s", err)
249 return
250 }
251 }
252}
253
254var boxofboxes = make(map[string]string)
255var boxlock sync.Mutex
256
257func getboxes(ident string) (string, string, error) {
258 boxlock.Lock()
259 defer boxlock.Unlock()
260 b, ok := boxofboxes[ident]
261 if ok {
262 if b == "" {
263 return "", "", fmt.Errorf("error?")
264 }
265 m := strings.Split(b, "\n")
266 return m[0], m[1], nil
267 }
268 j, err := GetJunk(ident)
269 if err != nil {
270 boxofboxes[ident] = ""
271 return "", "", err
272 }
273 inbox, _ := jsongetstring(j, "inbox")
274 outbox, _ := jsongetstring(j, "outbox")
275 boxofboxes[ident] = inbox + "\n" + outbox
276 return inbox, outbox, err
277}
278
279func peeppeep() {
280 user, _ := butwhatabout("")
281 honkers := gethonkers(user.ID)
282 for _, f := range honkers {
283 if f.Flavor != "peep" {
284 continue
285 }
286 log.Printf("getting updates: %s", f.XID)
287 _, outbox, err := getboxes(f.XID)
288 if err != nil {
289 log.Printf("error getting outbox: %s", err)
290 continue
291 }
292 log.Printf("getting outbox")
293 j, err := GetJunk(outbox)
294 if err != nil {
295 log.Printf("err: %s", err)
296 continue
297 }
298 t, _ := jsongetstring(j, "type")
299 if t == "OrderedCollection" {
300 items, _ := jsongetarray(j, "orderedItems")
301 if items == nil {
302 page1, _ := jsongetstring(j, "first")
303 j, err = GetJunk(page1)
304 if err != nil {
305 log.Printf("err: %s", err)
306 continue
307 }
308 items, _ = jsongetarray(j, "orderedItems")
309 }
310
311 for _, item := range items {
312 xonk := xonkxonk(item)
313 if xonk != nil && needxonk(user.ID, xonk) {
314 xonk.UserID = user.ID
315 savexonk(xonk)
316 }
317 }
318 }
319 }
320}
321
322func whosthere(xid string) []string {
323 obj, err := GetJunk(xid)
324 if err != nil {
325 log.Printf("error getting remote xonk: %s", err)
326 return nil
327 }
328 return newphone(nil, obj)
329}
330
331func newphone(a []string, obj map[string]interface{}) []string {
332 for _, addr := range []string{"to", "cc", "attributedTo"} {
333 who, _ := jsongetstring(obj, addr)
334 if who != "" {
335 a = append(a, who)
336 }
337 whos, _ := jsongetarray(obj, addr)
338 for _, w := range whos {
339 who, _ := w.(string)
340 if who != "" {
341 a = append(a, who)
342 }
343 }
344 }
345 return a
346}
347
348func xonkxonk(item interface{}) *Honk {
349 // id, _ := jsongetstring(item, "id")
350 what, _ := jsongetstring(item, "type")
351 dt, _ := jsongetstring(item, "published")
352
353 var audience []string
354 var err error
355 var xid, rid, url, content string
356 var obj map[string]interface{}
357 switch what {
358 case "Announce":
359 xid, _ = jsongetstring(item, "object")
360 log.Printf("getting bonk: %s", xid)
361 obj, err = GetJunk(xid)
362 if err != nil {
363 log.Printf("error regetting: %s", err)
364 }
365 what = "bonk"
366 case "Create":
367 obj, _ = jsongetmap(item, "object")
368 what = "honk"
369 case "Delete":
370 obj, _ = jsongetmap(item, "object")
371 what = "eradicate"
372 default:
373 log.Printf("unknown activity: %s", what)
374 return nil
375 }
376 who, _ := jsongetstring(item, "actor")
377
378 var xonk Honk
379 if obj != nil {
380 ot, _ := jsongetstring(obj, "type")
381 url, _ = jsongetstring(obj, "url")
382 if ot == "Note" || ot == "Article" {
383 audience = newphone(audience, obj)
384 xid, _ = jsongetstring(obj, "id")
385 content, _ = jsongetstring(obj, "content")
386 summary, _ := jsongetstring(obj, "content")
387 if summary != "" {
388 content = "<p>summary: " + summary + content
389 }
390 rid, _ = jsongetstring(obj, "inReplyTo")
391 if what == "honk" && rid != "" {
392 what = "tonk"
393 }
394 }
395 if ot == "Tombstone" {
396 rid, _ = jsongetstring(obj, "id")
397 }
398 atts, _ := jsongetarray(obj, "attachment")
399 for _, att := range atts {
400 at, _ := jsongetstring(att, "type")
401 mt, _ := jsongetstring(att, "mediaType")
402 u, _ := jsongetstring(att, "url")
403 name, _ := jsongetstring(att, "name")
404 if at == "Document" {
405 mt = strings.ToLower(mt)
406 log.Printf("attachment: %s %s", mt, u)
407 if mt == "image/jpeg" || mt == "image/png" ||
408 mt == "image/gif" {
409 donk := savedonk(u, name, mt)
410 if donk != nil {
411 xonk.Donks = append(xonk.Donks, donk)
412 }
413 }
414 }
415 }
416 tags, _ := jsongetarray(obj, "tag")
417 for _, tag := range tags {
418 tt, _ := jsongetstring(tag, "type")
419 name, _ := jsongetstring(tag, "name")
420 if tt == "Emoji" {
421 icon, _ := jsongetmap(tag, "icon")
422 mt, _ := jsongetstring(icon, "mediaType")
423 u, _ := jsongetstring(icon, "url")
424 donk := savedonk(u, name, mt)
425 if donk != nil {
426 xonk.Donks = append(xonk.Donks, donk)
427 }
428 }
429 }
430 }
431 audience = append(audience, who)
432
433 audience = oneofakind(audience)
434
435 xonk.What = what
436 xonk.Honker = who
437 xonk.XID = xid
438 xonk.RID = rid
439 xonk.Date, _ = time.Parse(time.RFC3339, dt)
440 xonk.URL = url
441 xonk.Noise = content
442 xonk.Audience = audience
443
444 return &xonk
445}
446
447func rubadubdub(user *WhatAbout, req map[string]interface{}) {
448 xid, _ := jsongetstring(req, "id")
449 reqactor, _ := jsongetstring(req, "actor")
450 j := NewJunk()
451 j["@context"] = itiswhatitis
452 j["id"] = user.URL + "/dub/" + xid
453 j["type"] = "Accept"
454 j["actor"] = user.URL
455 j["to"] = reqactor
456 j["published"] = time.Now().UTC().Format(time.RFC3339)
457 j["object"] = req
458
459 WriteJunk(os.Stdout, j)
460
461 actor, _ := jsongetstring(req, "actor")
462 inbox, _, err := getboxes(actor)
463 if err != nil {
464 log.Printf("can't get dub box: %s", err)
465 return
466 }
467 keyname, key := ziggy(user)
468 err = PostJunk(keyname, key, inbox, j)
469 if err != nil {
470 log.Printf("can't rub a dub: %s", err)
471 return
472 }
473 stmtSaveDub.Exec(user.ID, actor, actor, "dub")
474}
475
476func subsub(user *WhatAbout, xid string) {
477 j := NewJunk()
478 j["@context"] = itiswhatitis
479 j["id"] = user.URL + "/sub/" + xid
480 j["type"] = "Follow"
481 j["actor"] = user.URL
482 j["to"] = xid
483 j["object"] = xid
484 j["published"] = time.Now().UTC().Format(time.RFC3339)
485
486 inbox, _, err := getboxes(xid)
487 if err != nil {
488 log.Printf("can't send follow: %s", err)
489 return
490 }
491 WriteJunk(os.Stdout, j)
492 keyname, key := ziggy(user)
493 err = PostJunk(keyname, key, inbox, j)
494 if err != nil {
495 log.Printf("failed to subsub: %s", err)
496 }
497}
498
499func jonkjonk(user *WhatAbout, h *Honk) (map[string]interface{}, map[string]interface{}) {
500 dt := h.Date.Format(time.RFC3339)
501 var jo map[string]interface{}
502 j := NewJunk()
503 j["id"] = user.URL + "/" + h.What + "/" + h.XID
504 j["actor"] = user.URL
505 j["published"] = dt
506 j["to"] = h.Audience[0]
507 if len(h.Audience) > 1 {
508 j["cc"] = h.Audience[1:]
509 }
510
511 switch h.What {
512 case "tonk":
513 fallthrough
514 case "honk":
515 j["type"] = "Create"
516 jo = NewJunk()
517 jo["id"] = user.URL + "/h/" + h.XID
518 jo["type"] = "Note"
519 jo["published"] = dt
520 jo["url"] = user.URL + "/h/" + h.XID
521 jo["attributedTo"] = user.URL
522 if h.RID != "" {
523 jo["inReplyTo"] = h.RID
524 }
525 jo["to"] = h.Audience[0]
526 if len(h.Audience) > 1 {
527 jo["cc"] = h.Audience[1:]
528 }
529 jo["content"] = h.Noise
530 var tags []interface{}
531 g := bunchofgrapes(h.Noise)
532 for _, m := range g {
533 t := NewJunk()
534 t["type"] = "Mention"
535 t["name"] = m.who
536 t["href"] = m.where
537 tags = append(tags, t)
538 }
539 herd := herdofemus(h.Noise)
540 for _, e := range herd {
541 t := NewJunk()
542 t["id"] = e.ID
543 t["type"] = "Emoji"
544 t["name"] = e.Name
545 i := NewJunk()
546 i["type"] = "Image"
547 i["mediaType"] = "image/png"
548 i["url"] = e.ID
549 t["icon"] = i
550 tags = append(tags, t)
551 }
552 if len(tags) > 0 {
553 jo["tag"] = tags
554 }
555 var atts []interface{}
556 for _, d := range h.Donks {
557 if re_emus.MatchString(d.Name) {
558 continue
559 }
560 jd := NewJunk()
561 jd["mediaType"] = d.Media
562 jd["name"] = d.Name
563 jd["type"] = "Document"
564 jd["url"] = d.URL
565 atts = append(atts, jd)
566 }
567 if len(atts) > 0 {
568 jo["attachment"] = atts
569 }
570 j["object"] = jo
571 case "bonk":
572 j["type"] = "Announce"
573 j["object"] = h.XID
574 }
575
576 return j, jo
577}
578
579func honkworldwide(user *WhatAbout, honk *Honk) {
580 aud := append([]string{}, honk.Audience...)
581 for i, a := range aud {
582 if a == thewholeworld || a == user.URL {
583 aud[i] = ""
584 }
585 }
586 keyname, key := ziggy(user)
587 jonk, _ := jonkjonk(user, honk)
588 jonk["@context"] = itiswhatitis
589 for _, f := range getdubs(user.ID) {
590 inbox, _, err := getboxes(f.XID)
591 if err != nil {
592 log.Printf("error getting inbox %s: %s", f.XID, err)
593 continue
594 }
595 err = PostJunk(keyname, key, inbox, jonk)
596 if err != nil {
597 log.Printf("failed to post json to %s: %s", inbox, err)
598 }
599 for i, a := range aud {
600 if a == f.XID {
601 aud[i] = ""
602 }
603 }
604 }
605 for _, a := range aud {
606 if a != "" && !strings.HasSuffix(a, "/followers") {
607 inbox, _, err := getboxes(a)
608 if err != nil {
609 log.Printf("error getting inbox %s: %s", a, err)
610 continue
611 }
612 err = PostJunk(keyname, key, inbox, jonk)
613 if err != nil {
614 log.Printf("failed to post json to %s: %s", inbox, err)
615 }
616 }
617 }
618}
619
620func asjonker(user *WhatAbout) map[string]interface{} {
621 about := obfusbreak(user.About)
622
623 j := NewJunk()
624 j["@context"] = itiswhatitis
625 j["id"] = user.URL
626 j["type"] = "Person"
627 j["inbox"] = user.URL + "/inbox"
628 j["outbox"] = user.URL + "/outbox"
629 j["name"] = user.Display
630 j["preferredUsername"] = user.Name
631 j["summary"] = about
632 j["url"] = user.URL
633 a := NewJunk()
634 a["type"] = "icon"
635 a["mediaType"] = "image/png"
636 a["url"] = fmt.Sprintf("https://%s/a?a=%s", serverName, url.QueryEscape(user.URL))
637 j["icon"] = a
638 k := NewJunk()
639 k["id"] = user.URL + "#key"
640 k["owner"] = user.URL
641 k["publicKeyPem"] = user.Key
642 j["publicKey"] = k
643
644 return j
645}