(require openssl/sha1)
(require racket/date)
(require
- net/http-client
+ net/head
net/uri-codec
- net/url-string
- net/url-structs)
+ net/url)
(require (prefix-in info: "info.rkt"))
(U 'old->new
'new->old))
-(struct msg
+(define-type Result
+ (∀ (α β) (U (cons 'ok α)
+ (cons 'error β))))
+
+(struct Msg
([ts-epoch : Integer]
[ts-orig : String]
- [nick : String]
+ [nick : (Option String)]
[uri : Url]
- [text : String])
- #:type-name Msg)
+ [text : String]
+ [mentions : (Listof Peer)]))
+
+(struct Peer
+ ([nick : (Option String)]
+ [uri : Url]
+ [comment : (Option String)])
+ #:transparent)
-(struct feed
- ([nick : String]
- [uri : Url])
- #:type-name Feed)
+(struct Resp
+ ([status-line : String]
+ [headers : (Listof Bytes)]
+ [body-input : Input-Port])
+ #:transparent)
(: tt-home-dir Path-String)
(define tt-home-dir (build-path (expand-user-path "~") ".tt"))
-(: concurrent-filter-map (∀ (α β) (-> Natural (-> α β) (Listof α))))
+(: concurrent-filter-map (∀ (α β) (-> Natural (-> α β) (Listof α) (Listof β))))
(define (concurrent-filter-map num-workers f xs)
; TODO preserve order of elements OR communicate that reorder is expected
; TODO switch from mailboxes to channels
[n (vector-length colors)])
(λ (out-format color-i msg)
(let ([color (vector-ref colors (modulo color-i n))]
- [nick (msg-nick msg)]
- [uri (url->string (msg-uri msg))]
- [text (msg-text msg)])
+ [nick (Msg-nick msg)]
+ [uri (url->string (Msg-uri msg))]
+ [text (Msg-text msg)]
+ [mentions (Msg-mentions msg)])
(match out-format
['single-line
- (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n"
- (parameterize ([date-display-format 'iso-8601])
- (date->string (seconds->date [msg-ts-epoch msg]) #t))
- nick color text)]
+ (let ([nick (if nick nick uri)])
+ (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n"
+ (parameterize
+ ([date-display-format 'iso-8601])
+ (date->string (seconds->date (Msg-ts-epoch msg)) #t))
+ nick color text))]
['multi-line
- (printf "~a (~a)~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n"
- (parameterize ([date-display-format 'rfc2822])
- (date->string (seconds->date [msg-ts-epoch msg]) #t))
- (msg-ts-orig msg)
- nick uri color text)])))))
+ (let ([nick (if nick (string-append nick " ") "")])
+ (printf "~a (~a)~n\033[1;37m<~a~a>\033[0m~n\033[0;~am~a\033[0m~n~n"
+ (parameterize
+ ([date-display-format 'rfc2822])
+ (date->string (seconds->date (Msg-ts-epoch msg)) #t))
+ (Msg-ts-orig msg)
+ nick uri color text))])))))
(: rfc3339->epoch (-> String (Option Nonnegative-Integer)))
(define rfc3339->epoch
local-time?)])
(+ ts-epoch tz-offset))]
[_
- (log-error "Invalid timestamp: ~v" ts)
+ (log-debug "Invalid timestamp: ~v" ts)
#f]))))
-(: str->msg (-> String Url String (Option Msg)))
+(: str->msg (-> (Option String) Url String (Option Msg)))
(define str->msg
(let ([re (pregexp "^([^\\s\t]+)[\\s\t]+(.*)$")])
(λ (nick uri str)
+ (define str-head (substring str 0 (min 100 (string-length str))))
(with-handlers*
([exn:fail?
(λ (e)
- (log-error
+ (log-debug
"Failed to parse msg: ~v, from: ~v, at: ~v, because: ~v"
- str nick (url->string uri) e)
+ str-head nick (url->string uri) e)
#f)])
(match (regexp-match re str)
[(list _wholething ts-orig text)
(let ([ts-epoch (rfc3339->epoch ts-orig)])
(if ts-epoch
- (msg ts-epoch ts-orig nick uri text)
+ (let ([mentions
+ (filter-map
+ (λ (m) (match (regexp-match #px"@<([^>]+)>" m)
+ [(list _wholething nick-uri)
+ (str->peer nick-uri)]))
+ (regexp-match* #px"@<[^\\s]+([\\s]+)?[^>]+>" text))])
+ (Msg ts-epoch ts-orig nick uri text mentions))
(begin
- (log-error
+ (log-debug
"Msg rejected due to invalid timestamp: ~v, nick:~v, uri:~v"
- str nick (url->string uri))
+ str-head nick (url->string uri))
#f)))]
[_
- (log-debug "Non-msg line from nick:~a, line:~a" nick str)
+ (log-debug "Non-msg line from nick:~v, line:~a" nick str-head)
#f])))))
(module+ test
+ ; TODO Test for when missing-nick case
(let* ([tzs (for*/list ([d '("-" "+")]
[h '("5" "05")]
[m '("00" ":00" "57" ":57")])
z)]
[m (str->msg n u (string-append ts sep txt))])
(check-not-false m)
- (check-equal? (msg-nick m) n)
- (check-equal? (msg-uri m) u)
- (check-equal? (msg-text m) txt)
- (check-equal? (msg-ts-orig m) ts (format "Given: ~v" ts))
+ (check-equal? (Msg-nick m) n)
+ (check-equal? (Msg-uri m) u)
+ (check-equal? (Msg-text m) txt)
+ (check-equal? (Msg-ts-orig m) ts (format "Given: ~v" ts))
)))
(let* ([ts "2020-11-18T22:22:09-0500"]
[nick "foo"]
[uri "bar"]
[actual (str->msg nick uri (string-append ts tab text))]
- [expected (msg 1605756129 ts nick uri text)])
+ [expected (Msg 1605756129 ts nick uri text '())])
(check-equal?
- (msg-ts-epoch actual)
- (msg-ts-epoch expected)
+ (Msg-ts-epoch actual)
+ (Msg-ts-epoch expected)
"str->msg ts-epoch")
(check-equal?
- (msg-ts-orig actual)
- (msg-ts-orig expected)
+ (Msg-ts-orig actual)
+ (Msg-ts-orig expected)
"str->msg ts-orig")
(check-equal?
- (msg-nick actual)
- (msg-nick expected)
+ (Msg-nick actual)
+ (Msg-nick expected)
"str->msg nick")
(check-equal?
- (msg-uri actual)
- (msg-uri expected)
+ (Msg-uri actual)
+ (Msg-uri expected)
"str->msg uri")
(check-equal?
- (msg-text actual)
- (msg-text expected)
+ (Msg-text actual)
+ (Msg-text expected)
"str->msg text")))
(: str->lines (-> String (Listof String)))
(module+ test
(check-equal? (str->lines "abc\ndef\n\nghi") '("abc" "def" "ghi")))
-(: str->msgs (-> String Url String (Listof Msg)))
+(: str->msgs (-> (Option String) Url String (Listof Msg)))
(define (str->msgs nick uri str)
(filter-map (λ (line) (str->msg nick uri line)) (filter-comments (str->lines str))))
(: cache-dir Path-String)
(define cache-dir (build-path tt-home-dir "cache"))
+(define cache-object-dir (build-path cache-dir "objects"))
+
(: url->cache-file-path-v1 (-> Url Path-String))
(define (url->cache-file-path-v1 uri)
(define (hash-sha1 str) : (-> String String)
(define digest (sha1 in))
(close-input-port in)
digest)
- (build-path cache-dir (hash-sha1 (url->string uri))))
+ (build-path cache-object-dir (hash-sha1 (url->string uri))))
(: url->cache-file-path-v2 (-> Url Path-String))
(define (url->cache-file-path-v2 uri)
- (build-path cache-dir (uri-encode (url->string uri))))
+ (build-path cache-object-dir (uri-encode (url->string uri))))
+
+(define url->cache-object-path url->cache-file-path-v2)
+
+(: cache-object-filename->url (-> Path-String Url))
+(define (cache-object-filename->url name)
+ (string->url (uri-decode (path->string name))))
-(define url->cache-file-path url->cache-file-path-v2)
+(define (url->cache-etag-path uri)
+ (build-path cache-dir "etags" (uri-encode (url->string uri))))
-; TODO Return Option
-(: uri-read-cached (-> Url String))
+(define (url->cache-lmod-path uri)
+ (build-path cache-dir "lmods" (uri-encode (url->string uri))))
+
+(: uri-read-cached (-> Url (Option String)))
(define (uri-read-cached uri)
(define path-v1 (url->cache-file-path-v1 uri))
(define path-v2 (url->cache-file-path-v2 uri))
(if (file-exists? path-v2)
(file->string path-v2)
(begin
- (log-warning "Cache file not found for URI: ~a" (url->string uri))
- "")))
-
-(: str->feed (String (Option Feed)))
-(define (str->feed str)
- (log-debug "Parsing feed string: ~v" str)
- (match (string-split str)
- [(list nick u)
- (with-handlers*
- ([exn:fail?
- (λ (e)
- (log-error "Invalid URI: ~v, exn: ~v" u e)
- #f)])
- (feed nick (string->url u)))]
+ (log-debug "Cache file not found for URI: ~a" (url->string uri))
+ #f)))
+
+(: str->url (-> String (Option String)))
+(define (str->url s)
+ (with-handlers*
+ ([exn:fail? (λ (e) #f)])
+ (string->url s)))
+
+(: str->peer (String (Option Peer)))
+(define (str->peer str)
+ (log-debug "Parsing peer string: ~v" str)
+ (match
+ (regexp-match
+ #px"(([^\\s\t]+)[\\s\t]+)?([a-zA-Z]+://[^\\s\t]*)[\\s\t]*(#\\s*(.*))?"
+ str)
+ [(list _wholething
+ _nick-with-space
+ nick
+ url
+ _comment-with-hash
+ comment)
+ (match (str->url url)
+ [#f
+ (log-error "Invalid URI in peer string: ~v" str)
+ #f]
+ [url (Peer nick url comment)])]
[_
- (log-error "Invalid feed string: ~v" str)
+ (log-debug "Invalid peer string: ~v" str)
#f]))
+(module+ test
+ (check-equal?
+ (str->peer "foo http://bar/file.txt # some rando")
+ (Peer "foo" (str->url "http://bar/file.txt") "some rando"))
+ (check-equal?
+ (str->peer "http://bar/file.txt # some rando")
+ (Peer #f (str->url "http://bar/file.txt") "some rando"))
+ (check-equal?
+ (str->peer "http://bar/file.txt #")
+ (Peer #f (str->url "http://bar/file.txt") ""))
+ (check-equal?
+ (str->peer "http://bar/file.txt#") ; XXX URLs can have #s
+ (Peer #f (str->url "http://bar/file.txt#") #f))
+ (check-equal?
+ (str->peer "http://bar/file.txt")
+ (Peer #f (str->url "http://bar/file.txt") #f))
+ (check-equal?
+ (str->peer "foo http://bar/file.txt")
+ (Peer "foo" (str->url "http://bar/file.txt") #f))
+ (check-equal?
+ (str->peer "foo bar # baz")
+ #f)
+ (check-equal?
+ (str->peer "foo bar://baz # quux")
+ (Peer "foo" (str->url "bar://baz") "quux"))
+ (check-equal?
+ (str->peer "foo bar//baz # quux")
+ #f))
+
(: filter-comments (-> (Listof String) (Listof String)))
(define (filter-comments lines)
(filter-not (λ (line) (string-prefix? line "#")) lines))
-(: str->feeds (-> String (Listof Feed)))
-(define (str->feeds str)
- (filter-map str->feed (filter-comments (str->lines str))))
-
-(: file->feeds (-> Path-String (Listof Feed)))
-(define (file->feeds filename)
- (str->feeds (file->string filename)))
+(: str->peers (-> String (Listof Peer)))
+(define (str->peers str)
+ (filter-map str->peer (filter-comments (str->lines str))))
+
+(: peers->file (-> (Listof Peers) Path-String Void))
+(define (peers->file peers path)
+ (display-lines-to-file
+ (map (match-lambda
+ [(Peer n u c)
+ (format "~a~a~a"
+ (if n (format "~a " n) "")
+ (url->string u)
+ (if c (format " # ~a" c) ""))])
+ peers)
+ path
+ #:exists 'replace))
+
+(: file->peers (-> Path-String (Listof Peer)))
+(define (file->peers file-path)
+ (if (file-exists? file-path)
+ (str->peers (file->string file-path))
+ (begin
+ (log-warning "File does not exist: ~v" (path->string file-path))
+ '())))
+
+(define re-rfc2822
+ #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")
+
+(: b->n (-> Bytes (Option Number)))
+(define (b->n b)
+ (string->number (bytes->string/utf-8 b)))
+
+(: mon->num (-> Bytes Natural))
+(define/match (mon->num mon)
+ [(#"Jan") 1]
+ [(#"Feb") 2]
+ [(#"Mar") 3]
+ [(#"Apr") 4]
+ [(#"May") 5]
+ [(#"Jun") 6]
+ [(#"Jul") 7]
+ [(#"Aug") 8]
+ [(#"Sep") 9]
+ [(#"Oct") 10]
+ [(#"Nov") 11]
+ [(#"Dec") 12])
+
+(: rfc2822->epoch (-> Bytes (Option Nonnegative-Integer)))
+(define (rfc2822->epoch timestamp)
+ (match (regexp-match re-rfc2822 timestamp)
+ [(list _ _ dd mo yyyy HH MM SS)
+ #:when (and dd mo yyyy HH MM SS)
+ (find-seconds (b->n SS)
+ (b->n MM)
+ (b->n HH)
+ (b->n dd)
+ (mon->num mo)
+ (b->n yyyy)
+ #f)]
+ [_
+ #f]))
(: user-agent String)
(define user-agent
([prog-name "tt"]
[prog-version (info:#%info-lookup 'version)]
[prog-uri "https://github.com/xandkar/tt"]
- [user-feed-file (expand-user-path "~/twtxt-me.txt")]
+ [user-peer-file (build-path tt-home-dir "me")]
[user
- (if (file-exists? user-feed-file)
- (let ([user (first (file->feeds user-feed-file))])
- (format "+~a; @~a" (url->string (feed-uri user)) (feed-nick user)))
+ (if (file-exists? user-peer-file)
+ (match (first (file->peers user-peer-file))
+ [(Peer #f u _) (format "+~a" (url->string u) )]
+ [(Peer n u _) (format "+~a; @~a" (url->string u) n)])
(format "+~a" prog-uri))])
(format "~a/~a (~a)" prog-name prog-version user)))
-(: uri-download (-> Url Void))
-(define (uri-download u)
- (define cache-file-path (url->cache-file-path u))
- (log-debug "uri-download ~v into ~v" u cache-file-path)
- (match* ((url-scheme u) (url-host u) (url-port u))
- [(s h p)
- #:when (and s h)
- (define ssl? (string=? s "https"))
- (define-values (status-line headers body-input)
- ; TODO Timeout. Currently hangs on slow connections.
- (http-sendrecv
- h
- (url->string (struct-copy url u [scheme #f] [host #f]))
- #:ssl? ssl?
- #:port (cond [p p] [ssl? 443] [else 80])
- #:headers (list (format "User-Agent: ~a" user-agent))
- ))
+(: header-get (-> (Listof Bytes) Bytes (Option Bytes)))
+(define (header-get headers name)
+ (match (filter-map (curry extract-field name) headers)
+ [(list val) val]
+ [_ #f]))
+
+(: uri-download-from-port
+ (-> Url (Listof (U Bytes String)) Input-Port
+ (U 'skipped-cached 'downloaded-new))) ; TODO 'ok|'error ?
+(define (uri-download-from-port u headers body-input)
+ (define u-str (url->string u))
+ (log-debug "uri-download-from-port ~v into ~v" u-str cached-object-path)
+ (define cached-object-path (url->cache-object-path u))
+ (define cached-etag-path (url->cache-etag-path u))
+ (define cached-lmod-path (url->cache-lmod-path u))
+ (define etag (header-get headers #"ETag"))
+ (define lmod (header-get headers #"Last-Modified"))
+ (define lmod-curr (if lmod (rfc2822->epoch lmod) #f))
+ (define lmod-prev (if (file-exists? cached-lmod-path)
+ (rfc2822->epoch (file->bytes cached-lmod-path))
+ #f))
+ (log-debug "lmod-curr:~v lmod-prev:~v" lmod-curr lmod-prev)
+ (define cached?
+ (or (and etag
+ (file-exists? cached-etag-path)
+ (bytes=? etag (file->bytes cached-etag-path))
+ (begin
+ (log-debug "ETags match, skipping the rest of ~v" u-str)
+ #t))
+ (and lmod-curr
+ lmod-prev
+ (<= lmod-curr lmod-prev)
+ (begin
+ (log-debug "Last-Modified <= current skipping the rest of ~v" u-str)
+ #t))))
+ (if (not cached?)
+ (begin
+ (log-debug
+ "Downloading the rest of ~v. ETag: ~a, Last-Modified: ~v"
+ u-str etag lmod)
+ (make-parent-directory* cached-object-path)
+ (make-parent-directory* cached-etag-path)
+ (make-parent-directory* cached-lmod-path)
+ (call-with-output-file cached-object-path
+ (curry copy-port body-input)
+ #:exists 'replace)
+ (when etag
+ (display-to-file etag cached-etag-path #:exists 'replace))
+ (when lmod
+ (display-to-file lmod cached-lmod-path #:exists 'replace))
+ 'downloaded-new)
+ 'skipped-cached))
+
+(: uri-download
+ (-> Positive-Float Url
+ (Result (U 'skipped-cached 'downloaded-new)
+ Any))) ; TODO Maybe more-precise error type?
+(define (uri-download timeout u)
+ (define u-str (url->string u))
+ (define timeout-chan (make-channel))
+ (define result-chan (make-channel))
+ (define timeout-thread
+ (thread (λ ()
+ ; Doing this instead of sync/timeout to distinguish error values,
+ ; rather than just have #f to work with.
+ (sleep timeout)
+ (channel-put timeout-chan '(error . timeout)))))
+ (define result-thread
+ (thread (λ ()
+ ; XXX We timeout getting a response, but body download could
+ ; also take a long time and we might want to time that out as
+ ; well, but then we may end-up with partially downloaded
+ ; objects. But that could happen anyway if the server drops the
+ ; connection for whatever reason.
+ ;
+ ; Maybe that is OK once we start treating the
+ ; downloaded object as an addition to the stored set of
+ ; messages, rather than the final set of messages.
+
+ ; TODO message db
+ ; - 1st try can just be an in-memory set that gets written-to
+ ; and read-from disk as a whole.
+ (define result
+ (with-handlers
+ ; TODO Maybe name each known errno? (exn:fail:network:errno-errno e)
+ ([exn:fail:network?
+ (λ (e) `(error . (net-error . ,e)))]
+ [exn?
+ (λ (e) `(error . (other . ,e)))])
+ (define-values (status-line headers body-input)
+ (http-sendrecv/url
+ u
+ #:headers (list (format "User-Agent: ~a" user-agent))))
+ `(ok . ,(Resp status-line headers body-input))))
+ (channel-put result-chan result))))
+ (define result
+ (sync timeout-chan
+ result-chan))
+ (kill-thread result-thread)
+ (kill-thread timeout-thread)
+ (match result
+ [(cons 'error _)
+ result]
+ [(cons 'ok (Resp status-line headers body-input))
(log-debug "headers: ~v" headers)
(log-debug "status-line: ~v" status-line)
(define status
(string->number (second (string-split (bytes->string/utf-8 status-line)))))
(log-debug "status: ~v" status)
- ; TODO Handle redirects
- (if (= 200 status)
- (begin
- (make-parent-directory* cache-file-path)
- (call-with-output-file cache-file-path
- (curry copy-port body-input)
- #:exists 'replace))
- (raise status))]
- [(_ _ _)
- (log-error "Invalid URI: ~v" u)]))
+ ; TODO Handle redirects. Should be within same timeout as req and body.
+ (let ([result
+ (match status
+ [200
+ `(ok . ,(uri-download-from-port u headers body-input))]
+ [_
+ `(error . (http . ,status))])])
+ (close-input-port body-input)
+ result)]))
(: timeline-print (-> Out-Format (Listof Msg) Void))
(define (timeline-print out-format timeline)
(void (foldl (match-lambda**
- [((and m (msg _ _ nick _ _)) (cons prev-nick i))
- (let ([i (if (string=? prev-nick nick) i (+ 1 i))])
+ [((and m (Msg _ _ nick _ _ _)) (cons prev-nick i))
+ (let ([i (if (equal? prev-nick nick) i (+ 1 i))])
(msg-print out-format i m)
(cons nick i))])
(cons "" 0)
timeline)))
-(: feed->msgs (-> Feed (Listof Msg)))
-(define (feed->msgs f)
- (match-define (feed nick uri) f)
- (log-info "Reading feed nick:~a uri:~v" nick (url->string uri))
- (str->msgs nick uri (uri-read-cached uri)))
-
-(: feed-download (-> Feed Void))
-(define (feed-download f)
- (match-define (feed nick uri) f)
+(: peer->msgs (-> Peer (Listof Msg)))
+(define (peer->msgs peer)
+ (match-define (Peer nick uri _) peer)
+ (log-debug "Reading peer nick:~v uri:~v" nick (url->string uri))
+ (define msgs-data (uri-read-cached uri))
+ (if msgs-data
+ (str->msgs nick uri msgs-data)
+ '()))
+
+(: peer-download
+ (-> Positive-Float Peer
+ (Result (U 'skipped-cached 'downloaded-new)
+ Any)))
+(define (peer-download timeout peer)
+ (match-define (Peer nick uri _) peer)
(define u (url->string uri))
- (log-info "Downloading feed uri:~a" u)
- (with-handlers
- ([exn:fail?
- (λ (e)
- (log-error "Network error nick:~a uri:~v exn:~v" nick u e)
- #f)]
- [integer?
- (λ (status)
- (log-error "HTTP error nick:~a uri:~a status:~a" nick u status)
- #f)])
- (define-values (_result _tm-cpu-ms tm-real-ms _tm-gc-ms)
- (time-apply uri-download (list uri)))
- (log-info "Feed downloaded in ~a seconds, uri: ~a" (/ tm-real-ms 1000.0) u)))
-
-(: timeline-download (-> Integer (Listof Feed) Void))
-(define (timeline-download num-workers feeds)
- ; TODO No need for map - can just iter
- (void (concurrent-filter-map num-workers feed-download feeds)))
-
-; TODO timeline contract : time-sorted list of messages
-(: timeline-read (-> Timeline-Order (Listof Feed) (Listof Msg)))
-(define (timeline-read order feeds)
+ (log-info "Download BEGIN URL:~a" u)
+ (define-values (results _tm-cpu-ms tm-real-ms _tm-gc-ms)
+ (time-apply uri-download (list timeout uri)))
+ (define result (car results))
+ (log-info "Download END in ~a seconds, URL:~a, result:~s"
+ (/ tm-real-ms 1000.0)
+ u
+ result)
+ result)
+
+(: timeline-download (-> Integer Positive-Float (Listof Peer) Void))
+(define (timeline-download num-workers timeout peers)
+ (define results
+ (concurrent-filter-map num-workers
+ (λ (p) (cons p (peer-download timeout p)))
+ peers))
+ (define peers-ok
+ (filter-map (match-lambda
+ [(cons p (cons 'ok _)) p]
+ [(cons _ (cons 'error e)) #f])
+ results))
+ (define peers-err
+ (filter-map (match-lambda
+ [(cons _ (cons 'ok _))
+ #f]
+ [(cons p (cons 'error e))
+ (struct-copy Peer p [comment (format "~s" e)])])
+ results))
+ (peers->file peers-ok (build-path tt-home-dir "peers-last-downloaded-ok"))
+ (peers->file peers-err (build-path tt-home-dir "peers-last-downloaded-err")))
+
+(: uniq (∀ (α) (-> (Listof α) (Listof α))))
+(define (uniq xs)
+ (set->list (list->set xs)))
+
+(: peers->timeline (-> (listof Peer) (listof Msg)))
+(define (peers->timeline peers)
+ (append* (filter-map peer->msgs peers)))
+
+(: timeline-sort (-> (listof Msg) timeline-order (Listof Msgs)))
+(define (timeline-sort msgs order)
(define cmp (match order
['old->new <]
['new->old >]))
- (sort (append* (filter-map feed->msgs feeds))
- (λ (a b) (cmp (msg-ts-epoch a) (msg-ts-epoch b)))))
-
-(: start-logger (-> Log-Level Void))
-(define (start-logger level)
- (let* ([logger (make-logger #f #f level #f)]
- [log-receiver (make-log-receiver logger level)])
- (void (thread (λ ()
- (parameterize
- ([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)))
+ (sort msgs (λ (a b) (cmp (Msg-ts-epoch a)
+ (Msg-ts-epoch b)))))
+
+(: paths->peers (-> (Listof String) (Listof Peer)))
+(define (paths->peers paths)
+ (let* ([paths (match paths
+ ['()
+ (let ([peer-refs-file (build-path tt-home-dir "peers")])
+ (log-debug
+ "No peer ref file paths provided, defaulting to ~v"
+ (path->string peer-refs-file))
+ (list peer-refs-file))]
+ [paths
+ (log-debug "Peer ref file paths provided: ~v" paths)
+ (map string->path paths)])]
+ [peers (append* (map file->peers paths))])
+ (log-info "Read-in ~a peers." (length peers))
+ (uniq peers)))
+
+(: mentioned-peers-in-cache (-> (Listof Peer)))
+(define (mentioned-peers-in-cache)
+ (define msgs
+ (append* (map (λ (filename)
+ (define path (build-path cache-object-dir filename))
+ (define size (/ (file-size path) 1000000.0))
+ (log-debug "BEGIN parsing ~a MB from file: ~v"
+ size
+ (path->string path))
+ (define t0 (current-inexact-milliseconds))
+ (define m (filter-map
+ (λ (line)
+ (str->msg #f (cache-object-filename->url filename) line))
+ (filter-comments
+ (file->lines path))))
+ (define t1 (current-inexact-milliseconds))
+ (log-debug "END parsing ~a MB in ~a seconds from file: ~v."
+ size
+ (* 0.001 (- t1 t0))
+ (path->string path))
+ (when (empty? m)
+ (log-debug "No messages found in ~a" (path->string path)))
+ m)
+ (directory-list cache-object-dir))))
+ (uniq (append* (map Msg-mentions msgs))))
+
+(: log-writer-stop (-> Thread Void))
+(define (log-writer-stop log-writer)
+ (log-message (current-logger) 'fatal 'stop "Exiting." #f)
+ (thread-wait log-writer))
+
+(: log-writer-start (-> Log-Level Thread))
+(define (log-writer-start level)
+ (let* ([logger
+ (make-logger #f #f level #f)]
+ [log-receiver
+ (make-log-receiver logger level)]
+ [log-writer
+ (thread
+ (λ ()
+ (parameterize
+ ([date-display-format 'iso-8601])
+ (let loop ()
+ (match-define (vector level msg _ topic) (sync log-receiver))
+ (unless (equal? topic 'stop)
+ (eprintf "~a [~a] ~a~n" (date->string (current-date) #t) level msg)
+ (loop))))))])
+ (current-logger logger)
+ log-writer))
(module+ main
(let ([log-level 'info])
#:help-labels
""
"and <command> is one of"
- "r, read i : Read the timeline."
+ "r, read : Read the timeline (offline operation)."
"d, download : Download the timeline."
; TODO Add path dynamically
- "u, upload : Upload your twtxt file (alias to execute ~/.tt/upload)."
+ "u, upload : Upload your twtxt file (alias to execute ~/.tt/hooks/upload)."
+ "c, crawl : Discover new peers mentioned by known peers (offline operation)."
""
#:args (command . args)
- (start-logger log-level)
+ (define log-writer (log-writer-start log-level))
(current-command-line-arguments (list->vector args))
(match command
[(or "d" "download")
; Initially, 15 was fastest out of the tried: 1, 5, 10, 20. Then I
; started noticing significant slowdowns. Reducing to 5 seems to help.
- (let ([num-workers 5])
+ (let ([num-workers 5]
+ [timeout 10.0])
(command-line
#:program
"tt download"
[("-j" "--jobs")
njobs "Number of concurrent jobs."
(set! num-workers (string->number njobs))]
- #:args (filename)
- (define-values (_res _cpu real-ms _gc)
- (time-apply timeline-download (list num-workers (file->feeds filename))))
- ; TODO Sync with logger before exit
- (eprintf "Timeline downloaded in ~a seconds.~n" (/ real-ms 1000.0))
- ))]
+ [("-t" "--timeout")
+ seconds "Timeout seconds per request."
+ (set! timeout (string->number seconds))]
+ #:args file-paths
+ (let ([peers (paths->peers file-paths)])
+ (define-values (_res _cpu real-ms _gc)
+ (time-apply timeline-download (list num-workers timeout peers)))
+ (log-info "Downloaded timelines from ~a peers in ~a seconds."
+ (length peers)
+ (/ real-ms 1000.0)))))]
[(or "u" "upload")
(command-line
#:program
"tt upload"
#:args ()
- (if (system (path->string (build-path tt-home-dir "upload")))
+ (if (system (path->string (build-path tt-home-dir "hooks" "upload")))
(exit 0)
(exit 1)))]
[(or "r" "read")
(let ([out-format 'multi-line]
- [order 'old->new])
+ [order 'old->new]
+ [ts-min #f]
+ [ts-max #f])
(command-line
#:program
"tt read"
[("-r" "--rev")
"Reverse displayed timeline order."
(set! order 'new->old)]
+ [("-m" "--min")
+ m "Earliest time to display (ignore anything before it)."
+ (set! ts-min (rfc3339->epoch m))]
+ [("-x" "--max")
+ x "Latest time to display (ignore anything after it)."
+ (set! ts-max (rfc3339->epoch x))]
#:once-any
[("-s" "--short")
"Short output format"
[("-l" "--long")
"Long output format"
(set! out-format 'multi-line)]
- #:args (filename)
- (timeline-print out-format (timeline-read order (file->feeds filename)))))]
- ))))
+ #:args file-paths
+ (let* ([peers
+ (paths->peers file-paths)]
+ [timeline
+ (timeline-sort (peers->timeline peers) order)]
+ [timeline
+ (filter (λ (m) (and (if ts-min (>= (Msg-ts-epoch m)
+ ts-min)
+ #t)
+ (if ts-max (<= (Msg-ts-epoch m)
+ ts-max)
+ #t)))
+ timeline)])
+ (timeline-print out-format timeline))))]
+ [(or "c" "crawl")
+ (command-line
+ #:program
+ "tt crawl"
+ #:args ()
+ (let* ([peers-sort
+ (λ (peers) (sort peers (match-lambda**
+ [((Peer n1 _ _) (Peer n2 _ _))
+ (string<? (if n1 n1 "")
+ (if n2 n2 ""))])))]
+ [peers-all-file
+ (build-path tt-home-dir "peers-all")]
+ [peers-mentioned-file
+ (build-path tt-home-dir "peers-mentioned")]
+ [peers-parsed-file
+ (build-path tt-home-dir "peers-parsed")]
+ [peers-mentioned-curr
+ (mentioned-peers-in-cache)]
+ [peers-mentioned-prev
+ (file->peers peers-mentioned-file)]
+ [peers-mentioned
+ (peers-sort (uniq (append peers-mentioned-prev
+ peers-mentioned-curr)))]
+ [peers-all-prev
+ (file->peers peers-all-file)]
+ [peers-all
+ (list->set (append peers-mentioned
+ peers-all-prev))]
+ [peers-discovered
+ (set-subtract peers-all (list->set peers-all-prev))]
+ [peers-all
+ (peers-sort (set->list peers-all))]
+ [peers-parsed
+ (filter
+ (λ (p) (< 0 (length (peer->msgs p))))
+ peers-all)])
+ (log-info "Known peers mentioned: ~a" (length peers-mentioned))
+ (log-info "Known peers parsed ~a" (length peers-parsed))
+ (log-info "Known peers total: ~a" (length peers-all))
+ (log-info "Discovered ~a new peers:~n~a"
+ (set-count peers-discovered)
+ (pretty-format (map
+ (λ (p) (cons (Peer-nick p)
+ (url->string (Peer-uri p))))
+ (set->list peers-discovered))))
+ (peers->file peers-mentioned
+ peers-mentioned-file)
+ (peers->file peers-parsed
+ peers-parsed-file)
+ (peers->file peers-all
+ peers-all-file)))]
+ [command
+ (eprintf "Error: invalid command: ~v\n" command)
+ (eprintf "Please use the \"--help\" option to see a list of available commands.\n")
+ (exit 1)])
+ (log-writer-stop log-writer))))
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