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4764ff89 SK |
1 | #lang racket |
2 | ||
1d753430 | 3 | (require openssl/sha1) |
4764ff89 | 4 | (require racket/date) |
9c464d95 SK |
5 | (require (prefix-in info: setup/getinfo)) |
6 | (require | |
7 | net/http-client | |
8 | net/url-string | |
9 | net/url-structs) | |
4764ff89 | 10 | |
4764ff89 SK |
11 | (require rfc3339-old) |
12 | ||
78398948 | 13 | (module+ test |
de3ff448 | 14 | (require rackunit)) |
78398948 | 15 | |
9c464d95 SK |
16 | (struct msg |
17 | ( | |
18 | ts_epoch ; Integer | |
19 | ts_rfc3339 ; String | |
20 | nick ; String | |
21 | uri ; net/url-structs:url | |
22 | text ; String | |
23 | )) | |
24 | ||
25 | (struct feed | |
26 | ( | |
27 | nick ; String | |
28 | uri ; net/url-structs:url | |
29 | )) | |
4764ff89 | 30 | |
895a32cf | 31 | (define (concurrent-filter-map num_workers f xs) |
dad4504d | 32 | ; TODO preserve order of elements OR communicate that reorder is expected |
a239a233 | 33 | ; TODO switch from mailboxes to channels |
895a32cf SK |
34 | (define (make-worker id f) |
35 | (define parent (current-thread)) | |
36 | (λ () | |
37 | (define self (current-thread)) | |
38 | (define (work) | |
39 | (thread-send parent (cons 'next self)) | |
40 | (match (thread-receive) | |
c562bea3 SK |
41 | ['done (thread-send parent (cons 'exit id))] |
42 | [(cons 'unit x) (begin | |
43 | (define y (f x)) | |
44 | (when y (thread-send parent (cons 'result y))) | |
45 | (work))])) | |
895a32cf SK |
46 | (work))) |
47 | (define (dispatch ws xs ys) | |
48 | (if (empty? ws) | |
f1493e49 SK |
49 | ys |
50 | (match (thread-receive) | |
c562bea3 SK |
51 | [(cons 'exit w) (dispatch (remove w ws =) xs ys)] |
52 | [(cons 'result y) (dispatch ws xs (cons y ys))] | |
53 | [(cons 'next thd) (match xs | |
54 | ['() (begin | |
55 | (thread-send thd 'done) | |
56 | (dispatch ws xs ys))] | |
57 | [(cons x xs) (begin | |
58 | (thread-send thd (cons 'unit x)) | |
59 | (dispatch ws xs ys))])]))) | |
9926c9a9 SK |
60 | (define workers (range num_workers)) |
61 | (define threads (map (λ (id) (thread (make-worker id f))) workers)) | |
62 | (define results (dispatch workers xs '())) | |
895a32cf SK |
63 | (for-each thread-wait threads) |
64 | results) | |
65 | ||
dad4504d | 66 | (module+ test |
de3ff448 SK |
67 | (let* ([f (λ (x) (if (even? x) x #f))] |
68 | [xs (range 11)] | |
69 | [actual (sort (concurrent-filter-map 10 f xs) <)] | |
70 | [expected (sort ( filter-map f xs) <)]) | |
c562bea3 | 71 | (check-equal? actual expected "concurrent-filter-map"))) |
dad4504d | 72 | |
3d042e75 SK |
73 | (define msg-print |
74 | (let* ([colors (vector 36 33)] | |
75 | [n (vector-length colors)]) | |
76 | (λ (out-format color-i msg) | |
01e4c499 SK |
77 | (let ([color (vector-ref colors (modulo color-i n))] |
78 | [nick (msg-nick msg)] | |
9c464d95 | 79 | [uri (url->string (msg-uri msg))] |
01e4c499 | 80 | [text (msg-text msg)]) |
3d042e75 | 81 | (match out-format |
01e4c499 SK |
82 | ['single-line |
83 | (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n" | |
84 | (parameterize ([date-display-format 'iso-8601]) | |
9f94cca9 | 85 | (date->string (seconds->date [msg-ts_epoch msg]) #t)) |
01e4c499 SK |
86 | nick color text)] |
87 | ['multi-line | |
88 | (printf "~a~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n" | |
89 | (parameterize ([date-display-format 'rfc2822]) | |
9f94cca9 | 90 | (date->string (seconds->date [msg-ts_epoch msg]) #t)) |
01e4c499 | 91 | nick uri color text)]))))) |
e96264cc | 92 | |
b8528cc7 SK |
93 | ; TODO Implement rfc3339->epoch and remove dependency on rfc3339-old |
94 | ||
b4689464 SK |
95 | (define str->msg |
96 | (let ([re (pregexp "^([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}(:[0-9]{2})?)(\\.[0-9]+)?([^\\s\t]*)[\\s\t]+(.*)$")]) | |
97 | (λ (nick uri str) | |
98 | (with-handlers* | |
99 | ([exn:fail? | |
100 | (λ (e) | |
9c464d95 SK |
101 | (log-error |
102 | "Failed to parse msg: ~v, from: ~v, at: ~v, because: ~v" | |
103 | str nick (url->string uri) e) | |
b4689464 SK |
104 | #f)]) |
105 | (match (regexp-match re str) | |
106 | [(list _wholething ts s _fractional tz text) | |
c562bea3 | 107 | (let* |
b4689464 | 108 | ([ts_rfc3339 (string-append ts (if s "" ":00") (if tz tz ""))] |
c562bea3 | 109 | [t (string->rfc3339-record ts_rfc3339)] |
b4689464 | 110 | [s (rfc3339-record:second t)] |
c562bea3 | 111 | ; TODO handle tz offset |
b4689464 | 112 | [ts_epoch (find-seconds [if s s 0] |
c562bea3 SK |
113 | [rfc3339-record:minute t] |
114 | [rfc3339-record:hour t] | |
115 | [rfc3339-record:mday t] | |
116 | [rfc3339-record:month t] | |
117 | [rfc3339-record:year t])]) | |
b4689464 SK |
118 | (msg ts_epoch ts_rfc3339 nick uri text))] |
119 | [_ | |
120 | (log-debug "Non-msg line from nick:~a, line:~a" nick str) | |
121 | #f]))))) | |
88d50b3e | 122 | |
63afa259 | 123 | (module+ test |
b4689464 SK |
124 | (let* ([tzs (for*/list ([d '("-" "+")] |
125 | [h '("5" "05")] | |
126 | [m '("00" ":00" "57" ":57")]) | |
127 | (string-append d h m))] | |
128 | [tzs (list* "" "Z" tzs)]) | |
129 | (for* ([n '("fake-nick")] | |
130 | [u '("fake-uri")] | |
131 | [s '("" ":10")] | |
132 | [f '("" ".1337")] | |
133 | [z tzs] | |
134 | [sep (list "\t" " ")] | |
135 | [txt '("foo bar baz" "'jaz poop bear giraffe / tea" "@*\"``")]) | |
136 | (let* ([ts (string-append "2020-11-18T22:22" | |
137 | (if (non-empty-string? s) s ":00") | |
138 | z)] | |
139 | [m (str->msg n u (string-append ts sep txt))]) | |
140 | (check-not-false m) | |
141 | (check-equal? (msg-nick m) n) | |
142 | (check-equal? (msg-uri m) u) | |
143 | (check-equal? (msg-text m) txt) | |
144 | (check-equal? (msg-ts_rfc3339 m) ts (format "Given: ~v" ts)) | |
145 | ))) | |
146 | ||
de3ff448 SK |
147 | (let* ([ts "2020-11-18T22:22:09-0500"] |
148 | [tab " "] | |
149 | [text "Lorem ipsum"] | |
150 | [nick "foo"] | |
151 | [uri "bar"] | |
152 | [actual (str->msg nick uri (string-append ts tab text))] | |
153 | [expected (msg 1605756129 ts nick uri text)]) | |
c562bea3 SK |
154 | ; FIXME re-enable after handling tz offset |
155 | ;(check-equal? | |
156 | ; (msg-ts_epoch actual) | |
157 | ; (msg-ts_epoch expected) | |
158 | ; "str->msg ts_epoch") | |
159 | (check-equal? | |
160 | (msg-ts_rfc3339 actual) | |
161 | (msg-ts_rfc3339 expected) | |
162 | "str->msg ts_rfc3339") | |
163 | (check-equal? | |
164 | (msg-nick actual) | |
165 | (msg-nick expected) | |
166 | "str->msg nick") | |
167 | (check-equal? | |
168 | (msg-uri actual) | |
169 | (msg-uri expected) | |
170 | "str->msg uri") | |
171 | (check-equal? | |
172 | (msg-text actual) | |
173 | (msg-text expected) | |
174 | "str->msg text"))) | |
63afa259 | 175 | |
e96264cc SK |
176 | (define (str->lines str) |
177 | (string-split str (regexp "[\r\n]+"))) | |
178 | ||
63afa259 | 179 | (module+ test |
de3ff448 | 180 | (check-equal? (str->lines "abc\ndef\n\nghi") '("abc" "def" "ghi"))) |
63afa259 | 181 | |
b201e854 SK |
182 | (define (str->msgs nick uri str) |
183 | (filter-map (λ (line) (str->msg nick uri line)) (str->lines str))) | |
4764ff89 | 184 | |
1d753430 SK |
185 | (define (hash-sha1 str) |
186 | (define in (open-input-string str)) | |
187 | (define digest (sha1 in)) | |
188 | (close-input-port in) | |
189 | digest) | |
190 | ||
9c464d95 SK |
191 | (define (url->cache-file-path uri) |
192 | ; TODO Replace hashing with encoding | |
193 | (expand-user-path (string-append "~/.tt/cache/" (hash-sha1 (url->string uri))))) | |
194 | ||
4214c0f3 | 195 | (define (uri-read-cached uri) |
9c464d95 SK |
196 | (define path (url->cache-file-path uri)) |
197 | (if (file-exists? path) | |
198 | (file->string path) | |
0e16a46c | 199 | (begin |
9c464d95 | 200 | (log-warning "Cache file not found for URI: ~a" (url->string uri)) |
4214c0f3 SK |
201 | ""))) |
202 | ||
9c464d95 SK |
203 | (define (str->feed str) |
204 | (log-debug "Parsing feed string: ~v" str) | |
205 | (match (string-split str) | |
206 | [(list nick u) | |
207 | (with-handlers* | |
208 | ([exn:fail? | |
209 | (λ (e) | |
210 | (log-error "Invalid URI: ~v, exn: ~v" u e) | |
211 | #f)]) | |
212 | (feed nick (string->url u)))] | |
213 | [_ | |
214 | (log-error "Invalid feed string: ~v" str) | |
215 | #f])) | |
216 | ||
217 | (define (filter-comments lines) | |
218 | (filter-not (λ (line) (string-prefix? line "#")) lines)) | |
219 | ||
220 | (define (str->feeds str) | |
221 | (filter-map str->feed (filter-comments (str->lines str)))) | |
222 | ||
223 | (define (file->feeds filename) | |
224 | (str->feeds (file->string filename))) | |
225 | ||
226 | (define user-agent | |
227 | (let* | |
228 | ([prog-name "tt"] | |
229 | [prog-version ((info:get-info (list prog-name)) 'version)] | |
230 | [prog-uri "https://github.com/xandkar/tt"] | |
231 | [user-feed-file (expand-user-path "~/twtxt-me.txt")] | |
232 | [user | |
233 | (if (file-exists? user-feed-file) | |
234 | (let ([user (first (file->feeds user-feed-file))]) | |
235 | (format "+~a; @~a" (url->string (feed-uri user)) (feed-nick user))) | |
236 | (format "+~a" prog-uri))]) | |
237 | (format "~a/~a (~a)" prog-name prog-version user))) | |
238 | ||
239 | ; uri-download : net/url-structs:url -> Void | |
240 | (define (uri-download u) | |
241 | (define cache-file-path (url->cache-file-path u)) | |
242 | (log-debug "uri-download ~v into ~v" u cache-file-path) | |
243 | (match* ((url-scheme u) (url-host u) (url-port u)) | |
244 | [(s h p) | |
245 | #:when (and s h) | |
246 | (define ssl? (string=? s "https")) | |
247 | (define-values (status-line headers body-input) | |
248 | ; TODO Timeout. Currently hangs on slow connections. | |
249 | (http-sendrecv | |
250 | h | |
251 | (url->string (struct-copy url u [scheme #f] [host #f])) | |
252 | #:ssl? ssl? | |
253 | #:port (cond [p p] [ssl? 443] [else 80]) | |
254 | #:headers (list (format "User-Agent: ~a" user-agent)) | |
255 | )) | |
256 | (log-debug "headers: ~v" headers) | |
257 | (log-debug "status-line: ~v" status-line) | |
258 | (define status | |
259 | (string->number (second (string-split (bytes->string/utf-8 status-line))))) | |
260 | (log-debug "status: ~v" status) | |
261 | ; TODO Handle redirects | |
262 | (if (= 200 status) | |
263 | (call-with-output-file cache-file-path | |
264 | (λ (cache-output) | |
265 | (copy-port body-input cache-output)) | |
266 | #:exists 'replace) | |
267 | (raise status))] | |
268 | [(_ _ _) | |
269 | (log-error "Invalid URI: ~v" u)])) | |
4764ff89 | 270 | |
b201e854 | 271 | (define (timeline-print out-format timeline) |
3d042e75 SK |
272 | (void (foldl (match-lambda** |
273 | [((and m (msg _ _ nick _ _)) (cons prev-nick i)) | |
274 | (let ([i (if (string=? prev-nick nick) i (+ 1 i))]) | |
275 | (msg-print out-format i m) | |
276 | (cons nick i))]) | |
277 | (cons "" 0) | |
278 | timeline))) | |
4764ff89 | 279 | |
4214c0f3 | 280 | ; feed->msgs : Feed -> (Listof Msg) |
9c464d95 SK |
281 | (define (feed->msgs f) |
282 | (match-define (feed nick uri) f) | |
283 | (log-info "Reading feed nick:~a uri:~v" nick uri) | |
284 | (str->msgs nick uri (uri-read-cached uri))) | |
4214c0f3 SK |
285 | |
286 | ; feed-download : Feed -> Void | |
9c464d95 SK |
287 | (define (feed-download f) |
288 | (match-define (feed nick uri) f) | |
289 | (log-info "Downloading feed nick:~a uri:~a" nick (url->string uri)) | |
9a6a9f9a | 290 | (with-handlers |
9c464d95 | 291 | ([exn:fail? |
9a6a9f9a | 292 | (λ (e) |
9c464d95 | 293 | (log-error "Network error nick:~a uri:~v exn:~v" nick uri e) |
9a6a9f9a SK |
294 | #f)] |
295 | [integer? | |
296 | (λ (status) | |
9c464d95 | 297 | (log-error "HTTP error nick:~a uri:~a status:~a" nick uri status) |
9a6a9f9a | 298 | #f)]) |
9c464d95 | 299 | (uri-download uri))) |
4214c0f3 SK |
300 | |
301 | ; timeline-download : Integer -> (Listof Feed) -> Void | |
302 | (define (timeline-download num_workers feeds) | |
303 | ; TODO No need for map - can just iter | |
304 | (void (concurrent-filter-map num_workers feed-download feeds))) | |
9a6a9f9a SK |
305 | |
306 | ; TODO timeline contract : time-sorted list of messages | |
a4899240 SK |
307 | ; timeline-read : (U 'old->new 'new->old) -> (Listof Feeds) -> (Listof Msg) |
308 | (define (timeline-read order feeds) | |
309 | (define cmp (match order | |
310 | ['old->new <] | |
311 | ['new->old >])) | |
4214c0f3 | 312 | (sort (append* (filter-map feed->msgs feeds)) |
a4899240 | 313 | (λ (a b) (cmp (msg-ts_epoch a) (msg-ts_epoch b))))) |
4764ff89 | 314 | |
01e4c499 SK |
315 | (define (start-logger level) |
316 | (let* ([logger (make-logger #f #f level #f)] | |
317 | [log-receiver (make-log-receiver logger level)]) | |
318 | (void (thread (λ () | |
319 | (parameterize | |
320 | ([date-display-format 'iso-8601]) | |
321 | (let loop () | |
322 | (define data (sync log-receiver)) | |
323 | (define level (vector-ref data 0)) | |
324 | (define msg (vector-ref data 1)) | |
325 | (define ts (date->string (current-date) #t)) | |
326 | (eprintf "~a [~a] ~a~n" ts level msg) | |
327 | (loop)))))) | |
328 | (current-logger logger))) | |
329 | ||
24c6a76b | 330 | (module+ main |
24f1f64b | 331 | (let ([log-level 'info]) |
c562bea3 | 332 | (command-line |
24f1f64b SK |
333 | #:program |
334 | "tt" | |
c562bea3 | 335 | #:once-each |
01e4c499 SK |
336 | [("-d" "--debug") |
337 | "Enable debug log level." | |
338 | (set! log-level 'debug)] | |
24f1f64b SK |
339 | #:help-labels |
340 | "" | |
341 | "and <command> is one of" | |
4214c0f3 SK |
342 | "r, read i : Read the timeline." |
343 | "d, download : Download the timeline." | |
3a4b2233 | 344 | "u, upload : Upload your twtxt file (alias to execute ~/.tt/upload)." |
24f1f64b SK |
345 | "" |
346 | #:args (command . args) | |
4214c0f3 SK |
347 | (start-logger log-level) |
348 | (current-command-line-arguments (list->vector args)) | |
24f1f64b | 349 | (match command |
4214c0f3 SK |
350 | [(or "d" "download") |
351 | (let ([num_workers 15]) ; 15 was fastest out of the tried: 1, 5, 10, 20. | |
24f1f64b SK |
352 | (command-line |
353 | #:program | |
4214c0f3 | 354 | "tt download" |
24f1f64b SK |
355 | #:once-each |
356 | [("-j" "--jobs") | |
357 | njobs "Number of concurrent jobs." | |
358 | (set! num_workers (string->number njobs))] | |
4214c0f3 | 359 | #:args (filename) |
9c464d95 | 360 | (timeline-download num_workers (file->feeds filename))))] |
3a4b2233 SK |
361 | [(or "u" "upload") |
362 | (command-line | |
363 | #:program | |
364 | "tt upload" | |
365 | #:args () | |
366 | (if (system (path->string (expand-user-path "~/.tt/upload"))) | |
367 | (exit 0) | |
368 | (exit 1)))] | |
4214c0f3 | 369 | [(or "r" "read") |
a4899240 SK |
370 | (let ([out-format 'multi-line] |
371 | [order 'old->new]) | |
4214c0f3 SK |
372 | (command-line |
373 | #:program | |
374 | "tt read" | |
a4899240 SK |
375 | #:once-each |
376 | [("-r" "--rev") | |
377 | "Reverse displayed timeline order." | |
378 | (set! order 'new->old)] | |
24f1f64b SK |
379 | #:once-any |
380 | [("-s" "--short") | |
381 | "Short output format" | |
382 | (set! out-format 'single-line)] | |
383 | [("-l" "--long") | |
384 | "Long output format" | |
385 | (set! out-format 'multi-line)] | |
386 | #:args (filename) | |
a4899240 | 387 | (timeline-print out-format (timeline-read order (file->feeds filename)))))] |
24f1f64b | 388 | )))) |