Commit | Line | Data |
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4764ff89 SK |
1 | #lang racket |
2 | ||
1d753430 | 3 | (require openssl/sha1) |
4764ff89 SK |
4 | (require racket/date) |
5 | ||
6 | (require http-client) | |
7 | (require rfc3339-old) | |
8 | ||
78398948 | 9 | (module+ test |
de3ff448 | 10 | (require rackunit)) |
78398948 | 11 | |
87d0eb92 | 12 | (struct msg (ts_epoch ts_rfc3339 nick uri text)) |
4764ff89 SK |
13 | (struct feed (nick uri)) |
14 | ||
895a32cf | 15 | (define (concurrent-filter-map num_workers f xs) |
dad4504d | 16 | ; TODO preserve order of elements OR communicate that reorder is expected |
a239a233 | 17 | ; TODO switch from mailboxes to channels |
895a32cf SK |
18 | (define (make-worker id f) |
19 | (define parent (current-thread)) | |
20 | (λ () | |
21 | (define self (current-thread)) | |
22 | (define (work) | |
23 | (thread-send parent (cons 'next self)) | |
24 | (match (thread-receive) | |
c562bea3 SK |
25 | ['done (thread-send parent (cons 'exit id))] |
26 | [(cons 'unit x) (begin | |
27 | (define y (f x)) | |
28 | (when y (thread-send parent (cons 'result y))) | |
29 | (work))])) | |
895a32cf SK |
30 | (work))) |
31 | (define (dispatch ws xs ys) | |
32 | (if (empty? ws) | |
f1493e49 SK |
33 | ys |
34 | (match (thread-receive) | |
c562bea3 SK |
35 | [(cons 'exit w) (dispatch (remove w ws =) xs ys)] |
36 | [(cons 'result y) (dispatch ws xs (cons y ys))] | |
37 | [(cons 'next thd) (match xs | |
38 | ['() (begin | |
39 | (thread-send thd 'done) | |
40 | (dispatch ws xs ys))] | |
41 | [(cons x xs) (begin | |
42 | (thread-send thd (cons 'unit x)) | |
43 | (dispatch ws xs ys))])]))) | |
9926c9a9 SK |
44 | (define workers (range num_workers)) |
45 | (define threads (map (λ (id) (thread (make-worker id f))) workers)) | |
46 | (define results (dispatch workers xs '())) | |
895a32cf SK |
47 | (for-each thread-wait threads) |
48 | results) | |
49 | ||
dad4504d | 50 | (module+ test |
de3ff448 SK |
51 | (let* ([f (λ (x) (if (even? x) x #f))] |
52 | [xs (range 11)] | |
53 | [actual (sort (concurrent-filter-map 10 f xs) <)] | |
54 | [expected (sort ( filter-map f xs) <)]) | |
c562bea3 | 55 | (check-equal? actual expected "concurrent-filter-map"))) |
dad4504d | 56 | |
3d042e75 SK |
57 | (define msg-print |
58 | (let* ([colors (vector 36 33)] | |
59 | [n (vector-length colors)]) | |
60 | (λ (out-format color-i msg) | |
01e4c499 SK |
61 | (let ([color (vector-ref colors (modulo color-i n))] |
62 | [nick (msg-nick msg)] | |
63 | [uri (msg-uri msg)] | |
64 | [text (msg-text msg)]) | |
3d042e75 | 65 | (match out-format |
01e4c499 SK |
66 | ['single-line |
67 | (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n" | |
68 | (parameterize ([date-display-format 'iso-8601]) | |
69 | (date->string (seconds->date [msg-ts_epoch msg]) #t)) | |
70 | nick color text)] | |
71 | ['multi-line | |
72 | (printf "~a~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n" | |
73 | (parameterize ([date-display-format 'rfc2822]) | |
74 | (date->string (seconds->date [msg-ts_epoch msg]) #t)) | |
75 | nick uri color text)]))))) | |
e96264cc | 76 | |
b8528cc7 SK |
77 | ; TODO Implement rfc3339->epoch and remove dependency on rfc3339-old |
78 | ||
b4689464 SK |
79 | (define str->msg |
80 | (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]+(.*)$")]) | |
81 | (λ (nick uri str) | |
82 | (with-handlers* | |
83 | ([exn:fail? | |
84 | (λ (e) | |
85 | (log-error "Failed to parse msg: ~v, from: ~v, at: ~v, because: ~v" str nick uri e) | |
86 | #f)]) | |
87 | (match (regexp-match re str) | |
88 | [(list _wholething ts s _fractional tz text) | |
c562bea3 | 89 | (let* |
b4689464 | 90 | ([ts_rfc3339 (string-append ts (if s "" ":00") (if tz tz ""))] |
c562bea3 | 91 | [t (string->rfc3339-record ts_rfc3339)] |
b4689464 | 92 | [s (rfc3339-record:second t)] |
c562bea3 | 93 | ; TODO handle tz offset |
b4689464 | 94 | [ts_epoch (find-seconds [if s s 0] |
c562bea3 SK |
95 | [rfc3339-record:minute t] |
96 | [rfc3339-record:hour t] | |
97 | [rfc3339-record:mday t] | |
98 | [rfc3339-record:month t] | |
99 | [rfc3339-record:year t])]) | |
b4689464 SK |
100 | (msg ts_epoch ts_rfc3339 nick uri text))] |
101 | [_ | |
102 | (log-debug "Non-msg line from nick:~a, line:~a" nick str) | |
103 | #f]))))) | |
88d50b3e | 104 | |
63afa259 | 105 | (module+ test |
b4689464 SK |
106 | (let* ([tzs (for*/list ([d '("-" "+")] |
107 | [h '("5" "05")] | |
108 | [m '("00" ":00" "57" ":57")]) | |
109 | (string-append d h m))] | |
110 | [tzs (list* "" "Z" tzs)]) | |
111 | (for* ([n '("fake-nick")] | |
112 | [u '("fake-uri")] | |
113 | [s '("" ":10")] | |
114 | [f '("" ".1337")] | |
115 | [z tzs] | |
116 | [sep (list "\t" " ")] | |
117 | [txt '("foo bar baz" "'jaz poop bear giraffe / tea" "@*\"``")]) | |
118 | (let* ([ts (string-append "2020-11-18T22:22" | |
119 | (if (non-empty-string? s) s ":00") | |
120 | z)] | |
121 | [m (str->msg n u (string-append ts sep txt))]) | |
122 | (check-not-false m) | |
123 | (check-equal? (msg-nick m) n) | |
124 | (check-equal? (msg-uri m) u) | |
125 | (check-equal? (msg-text m) txt) | |
126 | (check-equal? (msg-ts_rfc3339 m) ts (format "Given: ~v" ts)) | |
127 | ))) | |
128 | ||
de3ff448 SK |
129 | (let* ([ts "2020-11-18T22:22:09-0500"] |
130 | [tab " "] | |
131 | [text "Lorem ipsum"] | |
132 | [nick "foo"] | |
133 | [uri "bar"] | |
134 | [actual (str->msg nick uri (string-append ts tab text))] | |
135 | [expected (msg 1605756129 ts nick uri text)]) | |
c562bea3 SK |
136 | ; FIXME re-enable after handling tz offset |
137 | ;(check-equal? | |
138 | ; (msg-ts_epoch actual) | |
139 | ; (msg-ts_epoch expected) | |
140 | ; "str->msg ts_epoch") | |
141 | (check-equal? | |
142 | (msg-ts_rfc3339 actual) | |
143 | (msg-ts_rfc3339 expected) | |
144 | "str->msg ts_rfc3339") | |
145 | (check-equal? | |
146 | (msg-nick actual) | |
147 | (msg-nick expected) | |
148 | "str->msg nick") | |
149 | (check-equal? | |
150 | (msg-uri actual) | |
151 | (msg-uri expected) | |
152 | "str->msg uri") | |
153 | (check-equal? | |
154 | (msg-text actual) | |
155 | (msg-text expected) | |
156 | "str->msg text"))) | |
63afa259 | 157 | |
e96264cc SK |
158 | (define (str->lines str) |
159 | (string-split str (regexp "[\r\n]+"))) | |
160 | ||
63afa259 | 161 | (module+ test |
de3ff448 | 162 | (check-equal? (str->lines "abc\ndef\n\nghi") '("abc" "def" "ghi"))) |
63afa259 | 163 | |
b201e854 SK |
164 | (define (str->msgs nick uri str) |
165 | (filter-map (λ (line) (str->msg nick uri line)) (str->lines str))) | |
4764ff89 | 166 | |
1d753430 SK |
167 | (define (hash-sha1 str) |
168 | (define in (open-input-string str)) | |
169 | (define digest (sha1 in)) | |
170 | (close-input-port in) | |
171 | digest) | |
172 | ||
0e16a46c SK |
173 | (define (uri-fetch use-cache uri) |
174 | (define cache-file-path | |
175 | (expand-user-path (string-append "~/.tt/cache/" (hash-sha1 uri)))) | |
176 | (if (and use-cache (file-exists? cache-file-path)) | |
177 | (begin | |
178 | (log-info "uri-fetch cached ~a" uri) | |
179 | (file->string cache-file-path)) | |
180 | (begin | |
181 | (log-info "uri-fetch new ~a" uri) | |
01e4c499 | 182 | ; TODO Timeout. Currently hangs on slow connections. |
0e16a46c SK |
183 | (let* ([resp (http-get uri)] |
184 | [status (http-response-code resp)] | |
185 | [body (http-response-body resp)]) | |
c562bea3 SK |
186 | (log-debug "finished GET ~a status:~a body length:~a" |
187 | uri status (string-length body)) | |
188 | ; TODO Handle redirects | |
189 | (if (= status 200) | |
190 | (begin | |
191 | (display-to-file body cache-file-path #:exists 'replace) | |
192 | body) | |
193 | ; TODO A more-informative exception | |
194 | (raise status)))))) | |
4764ff89 | 195 | |
b201e854 | 196 | (define (timeline-print out-format timeline) |
3d042e75 SK |
197 | (void (foldl (match-lambda** |
198 | [((and m (msg _ _ nick _ _)) (cons prev-nick i)) | |
199 | (let ([i (if (string=? prev-nick nick) i (+ 1 i))]) | |
200 | (msg-print out-format i m) | |
201 | (cons nick i))]) | |
202 | (cons "" 0) | |
203 | timeline))) | |
4764ff89 | 204 | |
0e16a46c | 205 | (define (feed->msgs use-cache feed) |
9a6a9f9a SK |
206 | (log-info "downloading feed nick:~a uri:~a" |
207 | (feed-nick feed) | |
208 | (feed-uri feed)) | |
209 | (with-handlers | |
210 | ([exn:fail:network? | |
211 | (λ (e) | |
212 | (log-error "network error nick:~a uri:~a exn:~a" | |
213 | (feed-nick feed) | |
214 | (feed-uri feed) | |
215 | e) | |
216 | #f)] | |
217 | [integer? | |
218 | (λ (status) | |
219 | (log-error "http error nick:~a uri:~a status:~a" | |
220 | (feed-nick feed) | |
221 | (feed-uri feed) | |
222 | status) | |
223 | #f)]) | |
b201e854 | 224 | (define uri (feed-uri feed)) |
0e16a46c | 225 | (str->msgs [feed-nick feed] uri [uri-fetch use-cache uri]))) |
9a6a9f9a SK |
226 | |
227 | ; TODO timeline contract : time-sorted list of messages | |
0e16a46c SK |
228 | (define (timeline use-cache num_workers feeds) |
229 | (sort (append* (concurrent-filter-map num_workers (curry feed->msgs use-cache) feeds)) | |
87d0eb92 | 230 | (λ (a b) [< (msg-ts_epoch a) (msg-ts_epoch b)]))) |
4764ff89 | 231 | |
be96956c SK |
232 | (define (str->feed str) |
233 | ; TODO validation | |
234 | (define toks (string-split str)) | |
87d0eb92 | 235 | (apply feed toks)) |
be96956c | 236 | |
4a94ef7b SK |
237 | (define (filter-comments lines) |
238 | (filter-not (λ (line) (string-prefix? line "#")) lines)) | |
239 | ||
be96956c | 240 | (define (str->feeds str) |
4a94ef7b | 241 | (map str->feed (filter-comments (str->lines str)))) |
be96956c SK |
242 | |
243 | (define (file->feeds filename) | |
244 | (str->feeds (file->string filename))) | |
245 | ||
4f3dbb24 | 246 | (define (user-agent prog-name prog-version) |
24c6a76b | 247 | (let* |
4f3dbb24 | 248 | ([prog-uri "https://github.com/xandkar/tt"] |
24c6a76b SK |
249 | [user-feed-file (expand-user-path "~/twtxt-me.txt")] |
250 | [user | |
251 | (if (file-exists? user-feed-file) | |
f1493e49 | 252 | (let ([user (first (file->feeds user-feed-file))]) |
c562bea3 | 253 | (format "+~a; @~a" (feed-uri user) (feed-nick user))) |
f1493e49 | 254 | (format "+~a" prog-uri))] |
24c6a76b SK |
255 | ) |
256 | (format "~a/~a (~a)" prog-name prog-version user))) | |
257 | ||
01e4c499 SK |
258 | (define (start-logger level) |
259 | (let* ([logger (make-logger #f #f level #f)] | |
260 | [log-receiver (make-log-receiver logger level)]) | |
261 | (void (thread (λ () | |
262 | (parameterize | |
263 | ([date-display-format 'iso-8601]) | |
264 | (let loop () | |
265 | (define data (sync log-receiver)) | |
266 | (define level (vector-ref data 0)) | |
267 | (define msg (vector-ref data 1)) | |
268 | (define ts (date->string (current-date) #t)) | |
269 | (eprintf "~a [~a] ~a~n" ts level msg) | |
270 | (loop)))))) | |
271 | (current-logger logger))) | |
272 | ||
24c6a76b | 273 | (module+ main |
24f1f64b | 274 | (require (prefix-in info: setup/getinfo)) |
26d172a9 | 275 | |
24f1f64b | 276 | (let ([log-level 'info]) |
c562bea3 | 277 | (command-line |
24f1f64b SK |
278 | #:program |
279 | "tt" | |
c562bea3 | 280 | #:once-each |
01e4c499 SK |
281 | [("-d" "--debug") |
282 | "Enable debug log level." | |
283 | (set! log-level 'debug)] | |
24f1f64b SK |
284 | #:help-labels |
285 | "" | |
286 | "and <command> is one of" | |
287 | "r, read : Read the timeline." | |
288 | "" | |
289 | #:args (command . args) | |
290 | (match command | |
291 | [(or "r" "read") | |
292 | (current-command-line-arguments (list->vector args)) | |
293 | (let ([use-cache | |
294 | #f] | |
295 | [out-format | |
296 | 'multi-line] | |
297 | [num_workers | |
298 | ; 15 was fastest out of the tried 1, 5, 10, 15 and 20. | |
299 | 15]) | |
300 | (command-line | |
301 | #:program | |
302 | "tt read" | |
303 | #:once-each | |
304 | [("-j" "--jobs") | |
305 | njobs "Number of concurrent jobs." | |
306 | (set! num_workers (string->number njobs))] | |
307 | [("-c" "--cached") | |
308 | "Read cached data instead of downloading." | |
309 | (set! use-cache #t)] | |
310 | #:once-any | |
311 | [("-s" "--short") | |
312 | "Short output format" | |
313 | (set! out-format 'single-line)] | |
314 | [("-l" "--long") | |
315 | "Long output format" | |
316 | (set! out-format 'multi-line)] | |
317 | #:args (filename) | |
318 | (start-logger log-level) | |
319 | (current-http-client/response-auto #f) | |
320 | (let* ([prog-name "tt"] | |
321 | [prog-version ((info:get-info (list prog-name)) 'version)] | |
322 | [user-agent (user-agent prog-name prog-version)]) | |
323 | (current-http-client/user-agent user-agent)) | |
324 | (timeline-print out-format | |
325 | (timeline use-cache | |
326 | num_workers | |
327 | (file->feeds filename)))))] | |
328 | )))) |