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