; TODO write
; TODO caching (use cache by default, unless explicitly asked for update)
; - [x] value --> cache
-; - [ ] value <-- cache
+; - [x] value <-- cache
; requires: commands
; TODO timeline limits
; TODO feed set operations (perhaps better done externally?)
; TODO timeline as a result of a query (feed set op + filter expressions)
; TODO named timelines
-; TODO CLI params
; TODO config files
; TODO parse "following" from feed
; - following = <nick> <uri>
(require rfc3339-old)
(module+ test
- (require rackunit))
+ (require rackunit))
(struct msg (ts_epoch ts_rfc3339 nick uri text))
(struct feed (nick uri))
results)
(module+ test
- (let* ([f (λ (x) (if (even? x) x #f))]
- [xs (range 11)]
- [actual (sort (concurrent-filter-map 10 f xs) <)]
- [expected (sort ( filter-map f xs) <)])
- (check-equal? actual expected "concurrent-filter-map")))
+ (let* ([f (λ (x) (if (even? x) x #f))]
+ [xs (range 11)]
+ [actual (sort (concurrent-filter-map 10 f xs) <)]
+ [expected (sort ( filter-map f xs) <)])
+ (check-equal? actual expected "concurrent-filter-map")))
(define (msg-print out-format odd msg)
(printf
(msg ts_epoch ts_rfc3339 nick uri text))))))
(module+ test
- (let* ([ts "2020-11-18T22:22:09-0500"]
- [tab " "]
- [text "Lorem ipsum"]
- [nick "foo"]
- [uri "bar"]
- [actual (str->msg nick uri (string-join (list ts text) tab))]
- [expected (msg 1605756129 ts nick uri text)])
- ; FIXME re-enable after handling tz offset
- ;(check-equal?
- ; (msg-ts_epoch actual)
- ; (msg-ts_epoch expected)
- ; "str->msg ts_epoch")
- (check-equal?
- (msg-ts_rfc3339 actual)
- (msg-ts_rfc3339 expected)
- "str->msg ts_rfc3339")
- (check-equal?
- (msg-nick actual)
- (msg-nick expected)
- "str->msg nick")
- (check-equal?
- (msg-uri actual)
- (msg-uri expected)
- "str->msg uri")
- (check-equal?
- (msg-text actual)
- (msg-text expected)
- "str->msg text")))
+ (let* ([ts "2020-11-18T22:22:09-0500"]
+ [tab " "]
+ [text "Lorem ipsum"]
+ [nick "foo"]
+ [uri "bar"]
+ [actual (str->msg nick uri (string-append ts tab text))]
+ [expected (msg 1605756129 ts nick uri text)])
+ ; FIXME re-enable after handling tz offset
+ ;(check-equal?
+ ; (msg-ts_epoch actual)
+ ; (msg-ts_epoch expected)
+ ; "str->msg ts_epoch")
+ (check-equal?
+ (msg-ts_rfc3339 actual)
+ (msg-ts_rfc3339 expected)
+ "str->msg ts_rfc3339")
+ (check-equal?
+ (msg-nick actual)
+ (msg-nick expected)
+ "str->msg nick")
+ (check-equal?
+ (msg-uri actual)
+ (msg-uri expected)
+ "str->msg uri")
+ (check-equal?
+ (msg-text actual)
+ (msg-text expected)
+ "str->msg text")))
(define (str->lines str)
(string-split str (regexp "[\r\n]+")))
(close-input-port in)
digest)
-(define (uri-fetch uri)
- (log-info "GET ~a" uri)
- (define resp (http-get uri))
- (define status (http-response-code resp))
- (define body (http-response-body resp))
- (log-debug "finished GET ~a status:~a body length:~a"
- uri status (string-length body))
- ; TODO Handle redirects
- (if (= status 200)
- (let*
- ([url-digest
- (hash-sha1 uri)]
- [cache-file-path
- (expand-user-path (string-append "~/.tt/cache/" url-digest))])
- (display-to-file
- body cache-file-path
- #:exists 'replace)
- body)
- ; TODO A more-informative exception
- (raise status)))
+(define (uri-fetch use-cache uri)
+ (define cache-file-path
+ (expand-user-path (string-append "~/.tt/cache/" (hash-sha1 uri))))
+ (if (and use-cache (file-exists? cache-file-path))
+ (begin
+ (log-info "uri-fetch cached ~a" uri)
+ (file->string cache-file-path))
+ (begin
+ (log-info "uri-fetch new ~a" uri)
+ (let* ([resp (http-get uri)]
+ [status (http-response-code resp)]
+ [body (http-response-body resp)])
+ (log-debug "finished GET ~a status:~a body length:~a"
+ uri status (string-length body))
+ ; TODO Handle redirects
+ (if (= status 200)
+ (begin
+ (display-to-file body cache-file-path #:exists 'replace)
+ body)
+ ; TODO A more-informative exception
+ (raise status))))))
(define (timeline-print out-format timeline)
(for ([msg timeline]
[i (in-naturals)])
(msg-print out-format (odd? i) msg)))
-(define (feed->msgs feed)
+(define (feed->msgs use-cache feed)
(log-info "downloading feed nick:~a uri:~a"
(feed-nick feed)
(feed-uri feed))
status)
#f)])
(define uri (feed-uri feed))
- (str->msgs [feed-nick feed] uri [uri-fetch uri])))
+ (str->msgs [feed-nick feed] uri [uri-fetch use-cache uri])))
; TODO timeline contract : time-sorted list of messages
-(define (timeline num_workers feeds)
- (sort (append* (concurrent-filter-map num_workers feed->msgs feeds))
+(define (timeline use-cache num_workers feeds)
+ (sort (append* (concurrent-filter-map num_workers (curry feed->msgs use-cache) feeds))
(λ (a b) [< (msg-ts_epoch a) (msg-ts_epoch b)])))
(define (str->feed str)
(define (file->feeds filename)
(str->feeds (file->string filename)))
-(define (we-are-twtxt)
- (define uri
- "https://raw.githubusercontent.com/mdom/we-are-twtxt/master/we-are-twtxt.txt")
- (str->feeds (uri-fetch uri)))
-
(define (user-agent prog-name prog-version)
(let*
([prog-uri "https://github.com/xandkar/tt"]
(format "~a/~a (~a)" prog-name prog-version user)))
(module+ main
- (require setup/getinfo)
+ (require setup/getinfo)
+
+ (let* ([level 'info]
+ [logger (make-logger #f #f level #f)]
+ [log-receiver (make-log-receiver logger level)])
+ (void (thread (λ ()
+ [date-display-format 'iso-8601]
+ [let loop ()
+ (define data (sync log-receiver))
+ (define level (vector-ref data 0))
+ (define msg (vector-ref data 1))
+ (define ts (date->string (current-date) #t))
+ (eprintf "~a [~a] ~a~n" ts level msg)
+ (loop)])))
+ (current-logger logger))
+ (current-http-response-auto #f)
+ (let* ([prog-name "tt"]
+ [prog-version ((get-info (list prog-name)) 'version)]
+ [user-agent (user-agent prog-name prog-version)])
+ (current-http-user-agent user-agent))
+ (date-display-format 'rfc2822)
+ (let* ([use-cache
+ #f]
+ [out-format
+ 'multi-line]
+ [num_workers
+ 15]) ; 15 was fastest out of the tried 1, 5, 10, 15 and 20.
+ (command-line
+ #:once-each
+ [("-c" "--cached")
+ "Read cached data instead of downloading."
+ (set! use-cache #t)]
+
+ [("-j" "--jobs")
+ njobs "Number of concurrent jobs."
+ (set! num_workers (string->number njobs))]
+
+ #:args (filename)
- (let* ([logger (make-logger #f #f 'debug #f)]
- [log-receiver (make-log-receiver logger 'debug)])
- (void (thread (λ ()
- [date-display-format 'iso-8601]
- [let loop ()
- (define data (sync log-receiver))
- (define level (vector-ref data 0))
- (define msg (vector-ref data 1))
- (define ts (date->string (current-date) #t))
- (eprintf "~a [~a] ~a~n" ts level msg)
- (loop)])))
- (current-logger logger))
- (current-http-response-auto #f)
- (let* ([prog-name "tt"]
- [prog-version ((get-info (list prog-name)) 'version)]
- [user-agent (user-agent prog-name prog-version)])
- (current-http-user-agent user-agent))
- (date-display-format 'rfc2822)
- (let ([feeds
- (let ([args (current-command-line-arguments)])
- (if (= 0 (vector-length args))
- (we-are-twtxt)
- (file->feeds (vector-ref args 0))))]
- [out-format
- 'multi-line]
- [num_workers
- 15]) ; 15 was fastest out of the tried 1, 5, 10, 15 and 20.
- (timeline-print out-format (timeline num_workers feeds))))
+ (timeline-print out-format
+ (timeline use-cache
+ num_workers
+ (file->feeds filename))))))