forked from cadence/breezewiki
91 lines
3.7 KiB
Racket
91 lines
3.7 KiB
Racket
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#lang racket/base
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(require racket/file
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racket/path
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racket/port
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racket/runtime-path
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racket/string
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net/url
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web-server/http
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web-server/servlet-dispatch
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web-server/dispatchers/filesystem-map
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(only-in web-server/dispatchers/dispatch next-dispatcher)
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"../archiver/archiver.rkt"
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"../lib/mime-types.rkt"
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"../lib/xexpr-utils.rkt"
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"../src/config.rkt")
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(provide
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page-static-archive)
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(define-runtime-path path-archive "../storage/archive")
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(define ((replacer wikiname) whole url)
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(format
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"url(~a)"
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(if (or (equal? url "")
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(equal? url "'")
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(string-contains? url "/resources-ucp/")
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(string-contains? url "/fonts/")
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(string-contains? url "/drm_fonts/")
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(string-contains? url "//db.onlinewebfonts.com/")
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(string-contains? url "//bits.wikimedia.org/")
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(string-contains? url "dropbox")
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(string-contains? url "only=styles")
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(string-contains? url "https://https://")
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(regexp-match? #rx"^%20|^'" url)
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(regexp-match? #rx"^\"?data:" url))
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url
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(let* ([norm-url
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(cond
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[(string-prefix? url "https://") url]
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[(string-prefix? url "http://") (regexp-replace #rx"http:" url "https:")]
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[(string-prefix? url "//") (string-append "https:" url)]
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[(string-prefix? url "/") (format "https://~a.fandom.com~a" wikiname url)]
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[else (raise-user-error "While calling replace-style-for-images, this URL had an unknown format and couldn't be saved:" url)])])
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(define p (image-url->values norm-url))
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;; (printf "hashed: ~a~n -> ~a~n #-> ~a~n" url (car p) (cdr p))
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(format "/archive/~a/images/~a" wikiname (cdr p))))))
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(define (replace-style-for-images wikiname path)
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(define content (file->string path))
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(regexp-replace* #rx"url\\(([^)]*)\\)" content (replacer wikiname)))
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(define (handle-style wikiname dest)
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(when (config-true? 'debug)
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(printf "using offline mode for style ~a ~a~n" wikiname dest))
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(define fs-path (build-path path-archive wikiname "styles" dest))
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(println fs-path)
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(unless (file-exists? fs-path)
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(next-dispatcher))
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(response-handler
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(define new-content (replace-style-for-images wikiname fs-path))
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(response/output
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#:code 200
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#:headers (list (header #"Content-Type" #"text/css")
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(header #"Referrer-Policy" #"same-origin"))
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(λ (out) (displayln new-content out)))))
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(define (handle-image wikiname dest) ;; dest is the hash with no extension
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(unless ((string-length dest) . >= . 40) (next-dispatcher))
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(response-handler
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(define dir (build-path path-archive wikiname "images" (substring dest 0 1) (substring dest 0 2)))
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(unless (directory-exists? dir) (next-dispatcher))
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(define candidates (directory-list dir))
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(define target (path->string (findf (λ (f) (string-prefix? (path->string f) dest)) candidates)))
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(unless target (next-dispatcher))
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(define ext (substring target 41))
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(response/output
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#:code 200
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#:headers (list (header #"Content-Type" (ext->mime-type (string->bytes/latin-1 ext))))
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(λ (out)
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(call-with-input-file (build-path dir target)
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(λ (in)
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(copy-port in out)))))))
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(define (page-static-archive req)
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(define path (url-path (request-uri req)))
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(define-values (_ wikiname kind dest) (apply values (map path/param-path path)))
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(cond [(equal? kind "styles") (handle-style wikiname dest)]
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[(equal? kind "images") (handle-image wikiname dest)]
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[else (response-handler (raise-user-error "page-static-archive: how did we get here?" kind))]))
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