1 #lang typed/racket/no-check
10 (require (prefix-in info: "info.rkt"))
18 (define-type Out-Format
22 (define-type Timeline-Order
27 (∀ (α β) (U (cons 'ok α)
30 (define-type Download-Result
31 (Result (U 'skipped-cached 'downloaded-new)
33 (Pair 'unsupported-url-scheme String)
34 (Pair 'http-not-ok Positive-Integer)
39 ([freq : Nonnegative-Integer]
40 [last : Nonnegative-Integer])
43 (define-type Url-Nick-Hist
44 (Immutable-HashTable Url (Immutable-HashTable (Option String) Hist)))
48 [nick : (Option String)]))
63 [mentions : (Listof Peer)]))
66 ([nick : (Option String)]
69 [comment : (Option String)])
74 (Prog "tt" (info:#%info-lookup 'version)))
78 (User (string->url "https://github.com/xandkar/tt") #f))
80 (: user->str (-> User String))
81 (define (user->str user)
82 (match-define (User u0 n) user)
83 (define u (url->string u0))
85 (format "+~a; @~a" u n)
88 (: user-agent->str (-> User-Agent String))
89 (define (user-agent->str ua)
90 (match-define (User-Agent u p) ua)
91 (format "~a/~a (~a)" (Prog-name p) (Prog-version p) (user->str u)))
93 (: user->user-agent User)
94 (define (user->user-agent user)
95 (User-Agent user prog))
97 (: user-agent-str String)
98 (define user-agent-str
99 (user-agent->str (user->user-agent user-default)))
101 (: set-user-agent-str (-> Path-String Void))
102 (define (set-user-agent-str filename)
103 (set! user-agent-str (user-agent->str (user->user-agent (file->user filename))))
104 (log-info "User-Agent string is now set to: ~v" user-agent-str))
106 (: file->user (-> Path-String User))
107 (define (file->user filename)
108 (if (file-exists? filename)
109 (match (file->peers filename)
112 "User-Agent. Found one peer in file: ~v. Using the found peer: ~a"
118 "User-Agent. Multiple peers in file: ~v. Picking arbitrary: ~a"
124 "User-Agent. No peers found in file: ~v. Using the default user: ~a"
130 "User-Agent. File doesn't exist: ~v. Using the default user: ~a"
135 (: peer->user (-> Peer User))
136 (define (peer->user p)
137 (match-define (Peer n u _ _) p)
140 (: peers-equal? (-> Peer Peer Boolean))
141 (define (peers-equal? p1 p2)
142 (equal? (Peer-url-str p1)
145 (: peer-hash (-> Peer Fixnum))
146 (define (peer-hash p)
147 (equal-hash-code (Peer-url-str p)))
149 (define-custom-set-types peers
153 ; XXX Without supplying above explicit hash procedure, we INTERMITTENTLY get
154 ; the following contract violations:
156 ; custom-elem-contents: contract violation
157 ; expected: custom-elem?
160 ; /usr/share/racket/collects/racket/private/set-types.rkt:104:0: custom-set->list
161 ; /home/siraaj/proj/pub/tt/tt.rkt:716:0: crawl
162 ; /usr/share/racket/collects/racket/cmdline.rkt:191:51
163 ; body of (submod "/home/siraaj/proj/pub/tt/tt.rkt" main)
165 ; TODO Investigate why and make a minimal reproducible test case.
167 (: peers-merge (-> (Listof Peer) * (Listof Peer)))
168 (define (peers-merge . peer-sets)
169 (define (merge-2 p1 p2)
171 [((Peer n1 _ _ _) (Peer n2 _ _ _)) #:when (and n1 n2) p1] ; TODO compare which is more-common?
172 [((Peer #f _ _ _) (Peer #f _ _ _)) p1] ; TODO update with most-common nick?
173 [((Peer n1 _ _ _) (Peer #f _ _ _)) p1]
174 [((Peer #f _ _ _) (Peer n2 _ _ _)) p2]))
175 (: merge-n (-> (Listof Peer) Peer))
176 (define (merge-n peers)
178 ['() (raise 'impossible)]
180 [(list* p1 p2 ps) (merge-n (cons (merge-2 p1 p2) ps))]))
181 (sort (map merge-n (group-by Peer-url-str (append* peer-sets)))
183 [((Peer _ _ u1 _) (Peer _ _ u2 _)) (string<? u1 u2)])))
186 (let* ([u1 "http://foo/bar"]
187 [u2 "http://baz/quux"]
188 [p1 (Peer #f (string->url u1) u1 #f)]
189 [p2 (Peer "a" (string->url u1) u1 #f)]
190 [p3 (Peer "b" (string->url u2) u2 #f)]
193 (check-equal? (list p3 p2) (peers-merge s1 s2))
194 (check-equal? (list p3 p2) (peers-merge s2 s1))))
196 (: tt-home-dir Path-String)
197 (define tt-home-dir (build-path (expand-user-path "~") ".tt"))
199 (: pub-peers-dir Path-String)
200 (define pub-peers-dir (build-path tt-home-dir "peers"))
202 (: concurrent-filter-map (∀ (α β) (-> Natural (-> α β) (Listof α) (Listof β))))
203 (define (concurrent-filter-map num-workers f xs)
204 ; TODO preserve order of elements OR communicate that reorder is expected
205 ; TODO switch from mailboxes to channels
206 (define (make-worker id f)
207 (define parent (current-thread))
209 (define self : Thread (current-thread))
210 (: work (∀ (α) (-> α)))
212 (thread-send parent (cons 'next self))
213 (match (thread-receive)
214 ['done (thread-send parent (cons 'exit id))]
215 [(cons 'unit x) (begin
217 (when y (thread-send parent (cons 'result y)))
220 (: dispatch (∀ (α β) (-> (Listof Nonnegative-Integer) (Listof α) (Listof β))))
221 (define (dispatch ws xs ys)
224 (match (thread-receive)
225 [(cons 'exit w) (dispatch (remove w ws =) xs ys)]
226 [(cons 'result y) (dispatch ws xs (cons y ys))]
227 [(cons 'next thd) (match xs
229 (thread-send thd 'done)
230 (dispatch ws xs ys))]
232 (thread-send thd (cons 'unit x))
233 (dispatch ws xs ys))])])))
234 (define workers (range num-workers))
235 (define threads (map (λ (id) (thread (make-worker id f))) workers))
236 (define results (dispatch workers xs '()))
237 (for-each thread-wait threads)
241 (let* ([f (λ (x) (if (even? x) x #f))]
243 [actual (sort (concurrent-filter-map 10 f xs) <)]
244 [expected (sort ( filter-map f xs) <)])
245 (check-equal? actual expected "concurrent-filter-map")))
247 (: msg-print (-> Out-Format Integer Msg Void))
249 (let* ([colors (vector 36 33)]
250 [n (vector-length colors)])
251 (λ (out-format color-i msg)
252 (let ([color (vector-ref colors (modulo color-i n))]
253 [nick (Peer-nick (Msg-from msg))]
254 [url (Peer-url-str (Msg-from msg))]
255 [text (Msg-text msg)])
258 (let ([nick (if nick nick url)])
259 (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n"
261 ([date-display-format 'iso-8601])
262 (date->string (seconds->date (Msg-ts-epoch msg)) #t))
265 (let ([nick (if nick (string-append nick " ") "")])
266 (printf "~a (~a)~n\033[1;37m<~a~a>\033[0m~n\033[0;~am~a\033[0m~n~n"
268 ([date-display-format 'rfc2822])
269 (date->string (seconds->date (Msg-ts-epoch msg)) #t))
271 nick url color text))])))))
273 (: rfc3339->epoch (-> String (Option Nonnegative-Integer)))
274 (define rfc3339->epoch
275 (let ([re (pregexp "^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2})(:([0-9]{2}))?(\\.[0-9]+)?(Z|([+-])([0-9]{1,2}):?([0-9]{2}))?$")])
277 (match (regexp-match re ts)
278 [(list _wholething yyyy mm dd HH MM _:SS SS _fractional tz-whole tz-sign tz-HH tz-MM)
281 (match* (tz-whole tz-sign tz-HH tz-MM)
284 [(_ (or "-" "+") (? identity h) (? identity m))
285 (let ([h (string->number h)]
286 [m (string->number m)]
287 ; Reverse to get back to UTC:
288 [op (match tz-sign ["+" -] ["-" +])])
289 (op 0 (+ (* 60 m) (* 60 (* 60 h)))))]
291 (log-warning "Impossible TZ string: ~v, components: ~v ~v ~v ~v" tz-whole a b c d)
295 [ts-epoch (find-seconds (if SS (string->number SS) 0)
300 (string->number yyyy)
302 (+ ts-epoch tz-offset))]
304 (log-debug "Invalid timestamp: ~v" ts)
307 (: str->msg (-> Peer String (Option Msg)))
309 (let ([re (pregexp "^([^\\s\t]+)[\\s\t]+(.*)$")])
311 (define from-str (peer->str from))
312 (define str-head (substring str 0 (min 100 (string-length str))))
317 "Failed to parse msg: ~v, from: ~v, at: ~v, because: ~v"
320 (match (regexp-match re str)
321 [(list _wholething ts-orig text)
322 (let ([ts-epoch (rfc3339->epoch ts-orig)])
326 (λ (m) (match (regexp-match #px"@<([^>]+)>" m)
327 [(list _wholething nick-url)
328 (str->peer nick-url)]))
329 (regexp-match* #px"@<[^\\s]+([\\s]+)?[^>]+>" text))])
330 (Msg ts-epoch ts-orig from text mentions))
333 "Msg rejected due to invalid timestamp. From:~v. Line:~v"
337 (log-debug "Non-msg line. From:~v. Line:~v" from-str str-head)
341 ; TODO Test for when missing-nick case
342 (let* ([tzs (for*/list ([d '("-" "+")]
344 [m '("00" ":00" "57" ":57")])
345 (string-append d h m))]
346 [tzs (list* "" "Z" tzs)])
347 (for* ([n '("fake-nick")]
348 [u '("http://fake-url")]
349 [p (list (Peer n (string->url u) u #f))]
353 [sep (list "\t" " ")]
354 [txt '("foo bar baz" "'jaz poop bear giraffe / tea" "@*\"``")])
355 (let* ([ts (string-append "2020-11-18T22:22"
356 (if (non-empty-string? s) s ":00")
358 [m (str->msg p (string-append ts sep txt))])
360 (check-equal? (Msg-from m) p)
361 (check-equal? (Msg-text m) txt)
362 (check-equal? (Msg-ts-orig m) ts (format "Given: ~v" ts))
365 (let* ([ts "2020-11-18T22:22:09-0500"]
370 [peer (Peer nick (string->url url) url #f)]
371 [actual (str->msg peer (string-append ts tab text))]
372 [expected (Msg 1605756129 ts peer text '())])
374 (Msg-ts-epoch actual)
375 (Msg-ts-epoch expected)
379 (Msg-ts-orig expected)
382 (Peer-nick (Msg-from actual))
383 (Peer-nick (Msg-from expected))
386 (Peer-url (Msg-from actual))
387 (Peer-url (Msg-from expected))
390 (Peer-url-str (Msg-from actual))
391 (Peer-url-str (Msg-from expected))
398 (: str->lines (-> String (Listof String)))
399 (define (str->lines str)
400 (string-split str (regexp "[\r\n]+")))
403 (check-equal? (str->lines "abc\ndef\n\nghi") '("abc" "def" "ghi")))
405 ; TODO Should return 2 things: 1) msgs; 2) metadata parsed from comments
406 ; TODO Update peer nick based on metadata?
407 (: str->msgs (-> Peer String (Listof Msg)))
408 (define (str->msgs peer str)
409 (filter-map (λ (line) (str->msg peer line))
410 (filter-comments (str->lines str))))
412 (: cache-dir Path-String)
413 (define cache-dir (build-path tt-home-dir "cache"))
415 (define cache-object-dir (build-path cache-dir "objects"))
417 (: url->cache-file-path-v1 (-> Url Path-String))
418 (define (url->cache-file-path-v1 url)
419 (define (hash-sha1 str) : (-> String String)
420 (define in (open-input-string str))
421 (define digest (sha1 in))
422 (close-input-port in)
424 (build-path cache-object-dir (hash-sha1 (url->string url))))
426 (: url->cache-file-path-v2 (-> Url Path-String))
427 (define (url->cache-file-path-v2 url)
428 (build-path cache-object-dir (uri-encode (url->string url))))
430 (define url->cache-object-path
431 url->cache-file-path-v2)
433 (define (url->cache-etag-path url)
434 (build-path cache-dir "etags" (uri-encode (url->string url))))
436 (define (url->cache-lmod-path url)
437 (build-path cache-dir "lmods" (uri-encode (url->string url))))
439 (: url-read-cached (-> Url (Option String)))
440 (define (url-read-cached url)
441 (define path-v1 (url->cache-file-path-v1 url))
442 (define path-v2 (url->cache-file-path-v2 url))
443 (when (file-exists? path-v1)
444 (rename-file-or-directory path-v1 path-v2 #t))
445 (if (file-exists? path-v2)
446 (file->string path-v2)
448 (log-debug "Cache file not found for URL: ~a" (url->string url))
451 (: str->url (-> String (Option String)))
454 ([exn:fail? (λ (e) #f)])
457 (: peer->str (-> Peer String))
458 (define (peer->str peer)
459 (match-define (Peer n _ u c) peer)
461 (if n (format "~a " n) "")
463 (if c (format " # ~a" c) "")))
465 (: str->peer (-> String (Option Peer)))
466 (define (str->peer str)
467 (log-debug "Parsing peer string: ~v" str)
470 #px"(([^\\s\t]+)[\\s\t]+)?([a-zA-Z]+://[^\\s\t]*)[\\s\t]*(#\\s*(.*))?"
478 (match (str->url url)
480 (log-error "Invalid URL in peer string: ~v" str)
483 (Peer nick url (url->string url) comment)])]
485 (log-debug "Invalid peer string: ~v" str)
490 (str->peer "foo http://bar/file.txt # some rando")
491 (Peer "foo" (str->url "http://bar/file.txt") "http://bar/file.txt" "some rando"))
493 (str->peer "http://bar/file.txt # some rando")
494 (Peer #f (str->url "http://bar/file.txt") "http://bar/file.txt" "some rando"))
496 (str->peer "http://bar/file.txt #")
497 (Peer #f (str->url "http://bar/file.txt") "http://bar/file.txt" ""))
499 (str->peer "http://bar/file.txt#") ; XXX URLs can have #s
500 (Peer #f (str->url "http://bar/file.txt#") "http://bar/file.txt#" #f))
502 (str->peer "http://bar/file.txt")
503 (Peer #f (str->url "http://bar/file.txt") "http://bar/file.txt" #f))
505 (str->peer "foo http://bar/file.txt")
506 (Peer "foo" (str->url "http://bar/file.txt") "http://bar/file.txt" #f))
508 (str->peer "foo bar # baz")
511 (str->peer "foo bar://baz # quux")
512 (Peer "foo" (str->url "bar://baz") "bar://baz" "quux"))
514 (str->peer "foo bar//baz # quux")
517 (: filter-comments (-> (Listof String) (Listof String)))
518 (define (filter-comments lines)
519 (filter-not (λ (line) (string-prefix? line "#")) lines))
521 (: str->peers (-> String (Listof Peer)))
522 (define (str->peers str)
523 (filter-map str->peer (filter-comments (str->lines str))))
525 (: peers->file (-> (Listof Peers) Path-String Void))
526 (define (peers->file peers path)
527 (make-parent-directory* path)
528 (display-lines-to-file
532 [((Peer n1 _ _ _) (Peer n2 _ _ _))
533 (string<? (if n1 n1 "")
538 (: file->peers (-> Path-String (Listof Peer)))
539 (define (file->peers file-path)
540 (if (file-exists? file-path)
541 (str->peers (file->string file-path))
543 (log-warning "File does not exist: ~v" (path->string file-path))
547 #px"^(Mon|Tue|Wed|Thu|Fri|Sat|Sun), ([0-9]{2}) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) ([0-9]{4}) ([0-2][0-9]):([0-6][0-9]):([0-6][0-9]) GMT")
549 (: b->n (-> Bytes (Option Number)))
551 (string->number (bytes->string/utf-8 b)))
553 (: mon->num (-> Bytes Natural))
554 (define/match (mon->num mon)
568 (: rfc2822->epoch (-> Bytes (Option Nonnegative-Integer)))
569 (define (rfc2822->epoch timestamp)
570 (match (regexp-match re-rfc2822 timestamp)
571 [(list _ _ dd mo yyyy HH MM SS)
572 #:when (and dd mo yyyy HH MM SS)
573 (find-seconds (b->n SS)
583 (: header-get (-> (Listof Bytes) Bytes (Option Bytes)))
584 (define (header-get headers name)
585 (match (filter-map (curry extract-field name) headers)
589 (: url-download-http-from-port
590 (-> Url (Listof (U Bytes String)) Input-Port
591 (U 'skipped-cached 'downloaded-new))) ; TODO 'ok|'error ?
592 (define (url-download-http-from-port u headers body-input)
593 ; TODO Update message db from here? or where?
594 ; - 1st try can just be an in-memory set that gets written-to
595 ; and read-from disk as a whole.
596 (define u-str (url->string u))
597 (log-debug "url-download-http-from-port ~v into ~v" u-str cached-object-path)
598 (define cached-object-path (url->cache-object-path u))
599 (define cached-etag-path (url->cache-etag-path u))
600 (define cached-lmod-path (url->cache-lmod-path u))
601 (define etag (header-get headers #"ETag"))
602 (define lmod (header-get headers #"Last-Modified"))
603 (define lmod-curr (if lmod (rfc2822->epoch lmod) #f))
604 (define lmod-prev (if (file-exists? cached-lmod-path)
605 (rfc2822->epoch (file->bytes cached-lmod-path))
607 (log-debug "lmod-curr:~v lmod-prev:~v" lmod-curr lmod-prev)
610 (file-exists? cached-etag-path)
611 (bytes=? etag (file->bytes cached-etag-path))
613 (log-debug "ETags match, skipping the rest of ~v" u-str)
617 (<= lmod-curr lmod-prev)
619 (log-debug "Last-Modified <= current skipping the rest of ~v" u-str)
624 "Downloading the rest of ~v. ETag: ~a, Last-Modified: ~v"
626 (make-parent-directory* cached-object-path)
627 (make-parent-directory* cached-etag-path)
628 (make-parent-directory* cached-lmod-path)
629 (call-with-output-file cached-object-path
630 (curry copy-port body-input)
633 (display-to-file etag cached-etag-path #:exists 'replace))
635 (display-to-file lmod cached-lmod-path #:exists 'replace))
639 (: url-download-http (-> Positive-Float Url Download-Result))
640 (define (url-download-http timeout u)
641 (define u-str (url->string u))
642 (define timeout-chan (make-channel))
643 (define result-chan (make-channel))
644 (define timeout-thread
646 ; Doing this instead of sync/timeout to distinguish error values,
647 ; rather than just have #f to work with.
649 (channel-put timeout-chan '(error . timeout)))))
650 (define result-thread
654 ; TODO Maybe name each known errno? (exn:fail:network:errno-errno e)
656 (λ (e) `(error . (net-error . ,e)))]
658 (λ (e) `(error . (other . ,e)))])
659 (define-values (status-line headers body-input)
662 #:headers (list (format "User-Agent: ~a" user-agent-str))))
663 (log-debug "headers: ~v" headers)
664 (log-debug "status-line: ~v" status-line)
666 (string->number (second (string-split (bytes->string/utf-8 status-line)))))
667 (log-debug "status: ~v" status)
669 ; TODO Handle redirects.
670 ; TODO Should a redirect update a peer URL?
673 `(ok . ,(url-download-http-from-port u headers body-input))]
675 `(error . (http-not-ok . ,status))])])
676 (close-input-port body-input)
678 (channel-put result-chan result))))
679 (define result (sync timeout-chan result-chan))
680 (kill-thread result-thread)
681 (kill-thread timeout-thread)
684 (: url-download (-> Positive-Float Url Download-Result))
685 (define (url-download timeout u)
686 (match (url-scheme u)
687 ; TODO Support Gopher.
689 (url-download-http timeout u)]
691 `(error . (unsupported-url-scheme . ,scheme))]))
693 (: timeline-print (-> Out-Format (Listof Msg) Void))
694 (define (timeline-print out-format timeline)
699 (void (foldl (match-lambda**
700 [((and m (Msg _ _ from _ _)) (cons prev-from i))
701 (let ([i (if (peers-equal? prev-from from) i (+ 1 i))])
702 (msg-print out-format i m)
704 (cons (Msg-from first-msg) 0)
707 (: peer->msgs (-> Peer (Listof Msg)))
708 (define (peer->msgs peer)
709 (match-define (Peer nick url url-str _) peer)
710 (log-debug "Reading peer nick:~v url:~v" nick url-str)
711 (define msgs-data (url-read-cached url))
714 (str->msgs peer msgs-data)
718 (-> Positive-Float Peer
719 (Result (U 'skipped-cached 'downloaded-new)
721 (define (peer-download timeout peer)
722 (match-define (Peer nick url u _) peer)
723 (log-info "Download BEGIN URL:~a" u)
724 (define-values (results _tm-cpu-ms tm-real-ms _tm-gc-ms)
725 (time-apply url-download (list timeout url)))
726 (define result (car results))
727 (log-info "Download END in ~a seconds, URL:~a, result:~s"
728 (/ tm-real-ms 1000.0)
733 (: timeline-download (-> Integer Positive-Float (Listof Peer) Void))
734 (define (timeline-download num-workers timeout peers)
736 (concurrent-filter-map num-workers
737 (λ (p) (cons p (peer-download timeout p)))
740 (filter-map (match-lambda
741 [(cons p (cons 'ok _)) p]
742 [(cons _ (cons 'error e)) #f])
745 (filter-map (match-lambda
746 [(cons _ (cons 'ok _))
748 [(cons p (cons 'error e))
749 (struct-copy Peer p [comment (format "~s" e)])])
751 (peers->file peers-ok (build-path tt-home-dir "peers-last-downloaded-ok.txt"))
752 (peers->file peers-err (build-path tt-home-dir "peers-last-downloaded-err.txt")))
754 (: peers->timeline (-> (Listof Peer) (Listof Msg)))
755 (define (peers->timeline peers)
756 (append* (filter-map peer->msgs peers)))
758 (: timeline-sort (-> (Listof Msg) timeline-order (Listof Msgs)))
759 (define (timeline-sort msgs order)
760 (define cmp (match order
763 (sort msgs (λ (a b) (cmp (Msg-ts-epoch a)
766 (: paths->peers (-> (Listof String) (Listof Peer)))
767 (define (paths->peers paths)
768 (let* ([paths (match paths
770 (let ([peer-refs-file (build-path tt-home-dir "following.txt")])
772 "No peer ref file paths provided, defaulting to ~v"
773 (path->string peer-refs-file))
774 (list peer-refs-file))]
776 (log-debug "Peer ref file paths provided: ~v" paths)
777 (map string->path paths)])]
778 [peers (apply peers-merge (map file->peers paths))])
779 (log-info "Read-in ~a peers." (length peers))
782 (: cache-filename->peer (-> Path-String (Option Peer)))
783 (define (cache-filename->peer filename)
784 (define nick #f) ; TODO Look it up in the nick-db when it exists.
785 (define url-str (uri-decode (path->string filename))) ; TODO Can these crash?
786 (match (str->url url-str)
788 [url (Peer nick url url-str #f)]))
790 (: peers-cached (-> (Listof Peer)))
791 (define (peers-cached)
793 (filter-map cache-filename->peer (directory-list cache-object-dir)))
795 (: peers-mentioned (-> (Listof Msg) (Listof Peer)))
796 (define (peers-mentioned msgs)
797 (append* (map Msg-mentions msgs)))
799 (: peers-filter-denied-domains (-> (Listof Peer) (Listof Peer)))
800 (define (peers-filter-denied-domains peers)
801 (define deny-file (build-path tt-home-dir "domains-deny.txt"))
803 (list->set (map string-trim (filter-comments (file->lines deny-file)))))
804 (define denied-domain-patterns
805 (set-map denied-hosts (λ (h) (pregexp (string-append "\\." h "$")))))
808 (define host (url-host (Peer-url p)))
809 (not (or (set-member? denied-hosts host)
810 (ormap (λ (d) (regexp-match? d host)) denied-domain-patterns))))
813 (: log-writer-stop (-> Thread Void))
814 (define (log-writer-stop log-writer)
815 (log-message (current-logger) 'fatal 'stop "Exiting." #f)
816 (thread-wait log-writer))
818 (: log-writer-start (-> Log-Level Thread))
819 (define (log-writer-start level)
821 (make-logger #f #f level #f)]
823 (make-log-receiver logger level)]
828 ([date-display-format 'iso-8601])
830 (match-define (vector level msg _ topic) (sync log-receiver))
831 (unless (equal? topic 'stop)
832 (eprintf "~a [~a] ~a~n" (date->string (current-date) #t) level msg)
834 (current-logger logger)
837 (: msgs->nick-hist (-> (Listof Msg) Url-Nick-Hist))
838 (define (msgs->nick-hist msgs)
840 (λ (msg url->nick->hist)
841 (match-define (Msg curr _ from _ mentions) msg)
843 (λ (peer url->nick->hist)
844 (match-define (Peer nick url _ _) peer)
846 (hash-update url->nick->hist
849 (hash-update nick->hist
853 (Hist (+ 1 freq) (max prev curr))])
858 (cons from mentions)))
862 (: url-nick-hist->file (-> Url-Nick-Hist Path-String Void))
863 (define (url-nick-hist->file unh filepath)
864 (define out (open-output-file filepath #:exists 'replace))
867 [(cons url nick->hist)
868 (displayln (url->string url) out)
869 (for-each (match-lambda
870 [(cons nick (Hist freq last))
871 (displayln (format " ~a ~a ~a" nick freq last) out)])
872 (sort (hash->list nick->hist)
874 [((cons _ (Hist a _)) (cons _ (Hist b _)))
878 (λ (a b) (string<? (url-host (car a))
879 (url-host (car b))))))
880 (close-output-port out))
882 (: url-nick-hist->dir (-> Url-Nick-Hist Path-String Void))
883 (define (url-nick-hist->dir unh dirpath)
887 (define filename (string-append (uri-encode (url->string url)) ".txt"))
888 (define filepath (build-path dirpath filename))
889 (make-parent-directory* filepath)
890 (display-lines-to-file
892 [(cons nick (Hist freq last))
893 (format "~a ~a ~a" nick freq last)])
894 (sort (hash->list nick->hist)
896 [((cons _ (Hist a _)) (cons _ (Hist b _)))
899 #:exists 'replace))))
901 (: update-nicks-history-files (-> Url-Nick-Hist Void))
902 (define (update-nicks-history-files unh)
903 (define nicks-dir (build-path tt-home-dir "nicks"))
904 (url-nick-hist->file unh (build-path nicks-dir "seen.txt"))
905 (url-nick-hist->dir unh (build-path nicks-dir "seen")))
907 (: url-nick-hist-most-by (-> Url-Nick-Hist Url (-> Hist Nonnegative-Integer) (Option String)))
908 (define (url-nick-hist-most-by url->nick->hist url by)
909 (match (hash-ref url->nick->hist url #f)
912 (match (sort (hash->list nick->hist)
913 (λ (a b) (> (by (cdr a))
916 [(cons (cons nick _) _) nick])]))
918 (: url-nick-hist-latest (-> Url-Nick-Hist Url (Option String)))
919 (define (url-nick-hist-latest unh url)
920 (url-nick-hist-most-by unh url Hist-last))
922 (: url-nick-hist-common (-> Url-Nick-Hist Url (Option String)))
923 (define (url-nick-hist-common unh url)
924 (url-nick-hist-most-by unh url Hist-freq))
926 (: peers-update-nick-to-common (-> Url-Nick-Hist (Listof Peer) (Listof Peer)))
927 (define (peers-update-nick-to-common unh peers)
930 (match (url-nick-hist-common unh (Peer-url p))
932 [n (struct-copy Peer p [nick n])]))
936 (let* ([url-str "http://foo"]
937 [url (string->url url-str)]
941 [ts-str-1 "2021-11-29T23:29:08-0500"]
942 [ts-str-2 "2021-11-29T23:30:00-0500"]
943 [ts-1 (rfc3339->epoch ts-str-1)]
944 [ts-2 (rfc3339->epoch ts-str-2)]
948 (str->msg (str->peer "test http://test")
949 (string-append ts-str " Hi @<" nick " " url-str ">"))])
950 (list (cons ts-str-2 nick1)
951 (cons ts-str-1 nick2)
952 (cons ts-str-1 nick2)
953 (cons ts-str-1 nick3)
954 (cons ts-str-1 nick3)
955 (cons ts-str-1 nick3)))]
957 (msgs->nick-hist msgs)])
958 (check-equal? (hash-ref (hash-ref hist url) nick1) (Hist 1 ts-2))
959 (check-equal? (hash-ref (hash-ref hist url) nick2) (Hist 2 ts-1))
960 (check-equal? (hash-ref (hash-ref hist url) nick3) (Hist 3 ts-1))
961 (check-equal? (url-nick-hist-common hist url) nick3)
962 (check-equal? (url-nick-hist-latest hist url) nick1)))
966 ; TODO Test the non-io parts of crawling
967 (let* ([peers-all-file
968 (build-path pub-peers-dir "all.txt")]
969 [peers-mentioned-file
970 (build-path pub-peers-dir "mentioned.txt")]
972 (build-path pub-peers-dir "downloaded-and-parsed.txt")]
974 (build-path pub-peers-dir "downloaded.txt")]
978 (peers->timeline peers-cached)]
980 (msgs->nick-hist cached-timeline)]
981 [peers-mentioned-curr
982 (peers-mentioned cached-timeline)]
983 [peers-mentioned-prev
984 (file->peers peers-mentioned-file)]
986 (file->peers peers-all-file)]
988 (peers-merge peers-mentioned-prev
989 peers-mentioned-curr)]
991 (peers-update-nick-to-common
993 (peers-merge peers-mentioned
997 (set->list (set-subtract (make-immutable-peers peers-all)
998 (make-immutable-peers peers-all-prev)))]
1000 (filter (λ (p) (> (length (peer->msgs p)) 0)) peers-all)])
1001 ; TODO Deeper de-duping
1002 (log-info "Known peers cached ~a" (length peers-cached))
1003 (log-info "Known peers mentioned: ~a" (length peers-mentioned))
1004 (log-info "Known peers parsed ~a" (length peers-parsed))
1005 (log-info "Known peers total: ~a" (length peers-all))
1006 (log-info "Discovered ~a new peers:~n~a"
1007 (length peers-discovered)
1010 [(Peer n _ u c) (list n u c)])
1012 (update-nicks-history-files url-nick-hist)
1013 (peers->file peers-cached
1015 (peers->file peers-mentioned
1016 peers-mentioned-file)
1017 (peers->file peers-parsed
1019 (peers->file peers-all
1022 (: read (-> (Listof String) Number Number Timeline-Order Out-Format Void))
1023 (define (read file-paths ts-min ts-max order out-format)
1025 (paths->peers file-paths)]
1027 (timeline-sort (peers->timeline peers) order)]
1030 (and (or (not ts-min) (>= (Msg-ts-epoch m) ts-min))
1031 (or (not ts-max) (<= (Msg-ts-epoch m) ts-max))))])
1032 (timeline-print out-format (filter include? msgs))))
1034 (: upload (-> Void))
1036 ; FIXME Should not exit from here, but only after cleanup/logger-stoppage.
1037 (if (system (path->string (build-path tt-home-dir "hooks" "upload")))
1041 (: download (-> (Listof String) Positive-Integer Positive-Float Void))
1042 (define (download file-paths num-workers timeout)
1043 (let* ([peers-given (paths->peers file-paths)]
1044 [peers-kept (peers-filter-denied-domains peers-given)]
1045 [peers-denied (set-subtract peers-given peers-kept)])
1046 (log-info "Denied ~a peers" (length peers-denied))
1047 (define-values (_res _cpu real-ms _gc)
1048 (time-apply timeline-download (list num-workers timeout peers-kept)))
1049 (log-info "Downloaded timelines from ~a peers in ~a seconds."
1051 (/ real-ms 1000.0))))
1053 (: dispatch (-> String Void))
1054 (define (dispatch command)
1056 [(or "d" "download")
1057 ; 20 was fastest out of the tried: 1, 5, 10, 20, 25, 30.
1058 (let ([num-workers : Positive-Integer 20]
1059 [timeout : Positive-Flonum 10.0])
1061 #:program "tt download"
1064 positive-integer "Number of concurrent jobs."
1066 (assert (string->number positive-integer)
1067 (conjoin exact-positive-integer?)))]
1069 positive-float "Timeout seconds per request."
1071 (assert (string->number positive-float)
1072 (conjoin positive? flonum?)))]
1074 (download file-paths num-workers timeout)))]
1077 #:program "tt upload" #:args () (upload))]
1079 (let ([out-format 'multi-line]
1087 "Reverse displayed timeline order."
1088 (set! order 'new->old)]
1090 m "Earliest time to display (ignore anything before it)."
1091 (set! ts-min (rfc3339->epoch m))]
1093 x "Latest time to display (ignore anything after it)."
1094 (set! ts-max (rfc3339->epoch x))]
1097 "Short output format"
1098 (set! out-format 'single-line)]
1100 "Long output format"
1101 (set! out-format 'multi-line)]
1103 (read file-paths ts-min ts-max order out-format)))]
1106 #:program "tt crawl" #:args () (crawl))]
1108 (eprintf "Error: invalid command: ~v\n" command)
1109 (eprintf "Please use the \"--help\" option to see a list of available commands.\n")
1113 (let ([log-level 'info])
1119 "Enable debug log level."
1120 (set! log-level 'debug)]
1123 "and <command> is one of"
1124 "r, read : Read the timeline (offline operation)."
1125 "d, download : Download the timeline."
1126 ; TODO Add path dynamically
1127 "u, upload : Upload your twtxt file (alias to execute ~/.tt/hooks/upload)."
1128 "c, crawl : Discover new peers mentioned by known peers (offline operation)."
1130 #:args (command . args)
1131 (define log-writer (log-writer-start log-level))
1132 (current-command-line-arguments (list->vector args))
1133 (set-user-agent-str (build-path tt-home-dir "user.txt"))
1134 ; TODO dispatch should return status with which we should exit after cleanups
1136 (log-writer-stop log-writer))))