#lang racket/base (require racket/list racket/contract racket/rerequire racket/file racket/format xml racket/match racket/set racket/string racket/promise racket/path) (require web-server/http/xexpr web-server/dispatchers/dispatch) (require net/url) (require web-server/http/request-structs) (require web-server/http/response-structs) (require 2htdp/image) (require "world.rkt" "render.rkt" sugar txexpr "predicates.rkt" "debug.rkt" "ptree.rkt") (module+ test (require rackunit)) ;;; Routes for the server module ;;; separated out for ease of testing ;;; because it's tedious to start the server just to check a route. (provide route-dashboard route-xexpr route-default route-404 route-in route-out) (define (body-wrapper content-xexpr) `(html (head (meta ([charset "UTF-8"])) (link ([rel "stylesheet"] [type "text/css"] [href ,(format "/~a" DASHBOARD_CSS)]))) (body ,content-xexpr (div ((id "pollen-logo")))))) ;; to make dummy requests for debugging (define/contract (string->request u) (string? . -> . request?) (make-request #"GET" (string->url u) empty (delay empty) #f "1.2.3.4" 80 "4.3.2.1")) ;; print message to console about a request (define/contract (logger req) (request? . -> . void?) (define client (request-client-ip req)) (define localhost-client "::1") (define url-string (url->string (request-uri req))) (message "Request:" (string-replace url-string DASHBOARD_NAME " dashboard") (if (not (equal? client localhost-client)) (format "from ~a" client) ""))) ;; pass string args to route, then ;; package route into right format for web server ;; todo: fix inbound contrfact to be proc with (path? . -> . xexpr?) ;; todo: fix outbound contract to be proc with (request? #:rest args . -> . response?) (define/contract (route-wrapper route-proc) (procedure? . -> . procedure?) (λ(req . string-args) (logger req) (define path (apply build-path PROJECT_ROOT (flatten string-args))) (response/xexpr (route-proc path)))) ;; extract main xexpr from a path (define/contract (file->xexpr path #:render [wants-render #t]) ((complete-path?) (#:render boolean?) . ->* . txexpr?) (when wants-render (render path)) (dynamic-rerequire path) ; stores module mod date; reloads if it's changed (dynamic-require path 'main)) ;; todo: rewrite this test, obsolete since filename convention changed ;;(module+ test ;; (check-equal? (file->xexpr (build-path (current-directory) "tests/server-routes/foo.p") #:render #f) '(root "\n" "foo"))) ;; read contents of file to string ;; just file->string with a render option (define/contract (slurp path #:render [wants-render #t]) ((complete-path?) (#:render boolean?) . ->* . string?) (when wants-render (render path)) (file->string path)) (module+ test (check-equal? (slurp (build-path (current-directory) "tests/server-routes/bar.html") #:render #f) "

bar

")) ;; add a wrapper to txexpr that displays it as monospaced text ;; for "view source"ish functions ;; takes either a string or an xexpr (define/contract (format-as-code x) (xexpr? . -> . txexpr?) (body-wrapper `(tt ,x))) (define (handle-image-path p) (pathish? . -> . xexpr?) (define path (->complete-path p)) (define img (bitmap/file path)) (define relative-path (->string (find-relative-path PROJECT_ROOT path))) (define img-url (format "/~a" relative-path)) `(div (p "filename =" ,(->string relative-path)) (p "size = " ,(bytecount->string (file-size path))) ,@(when/splice (not (equal? (get-ext path) "svg")) `(p "width = " ,(->string (image-width img)) " " "height = " ,(->string (image-height img)))) (a ((href ,img-url)) (img ((style "width:100%;border:1px solid #eee")(src ,img-url)))))) (require file/unzip) (define (handle-zip-path p) (pathish? . -> . xexpr?) (define path (->path p)) (define relative-path (->string (find-relative-path PROJECT_ROOT path))) (define ziplist (zip-directory-entries (read-zip-directory path))) `(div (p "filename =" ,(->string relative-path)) (p "size = " ,(bytecount->string (file-size path))) (ul ,@(map (λ(i) `(li ,(~a i))) ziplist)))) (define/contract (make-binary-info-page p) (pathish? . -> . xexpr?) (define path (->complete-path p)) (cond [((get-ext path) . in? . '("gif" "jpg" "jpeg" "png" "svg")) (handle-image-path path)] [((get-ext path) . in? . '("zip")) (handle-zip-path path)] [else '(p "We got some other kind of binary file.")])) ;; server routes ;; these all produce an xexpr, which is handled upstream by response/xexpr ;; server routes that show result, formatted as code ;; route-in just gets file from disk; route-out renders it first (define/contract (in path) (complete-path? . -> . xexpr?) (format-as-code (slurp path #:render #f))) (define route-in (route-wrapper in)) (define/contract (out path) (complete-path? . -> . xexpr?) (cond [(or (has-binary-ext? path) (sourceish? path)) (make-binary-info-page path)] [else (format-as-code (slurp path #:render #t))])) (define route-out (route-wrapper out)) ;; dashboard route (define (dashboard dashfile) (define dir (get-enclosing-dir dashfile)) (define (in-project-root?) (directories-equal? dir PROJECT_ROOT)) (define parent-dir (and (not (in-project-root?)) (get-enclosing-dir dir))) (define empty-cell (cons #f #f)) (define (make-link-cell href+text) (match-define (cons href text) href+text) (filter-not void? `(td ,(when text (if href `(a ((href ,href)) ,text) text))))) (define (make-parent-row) (if parent-dir (let* ([url-to-parent-dashboard (format "/~a" (find-relative-path PROJECT_ROOT (build-path parent-dir DASHBOARD_NAME)))] [url-to-parent (string-replace url-to-parent-dashboard DASHBOARD_NAME "")]) `(tr (th ((colspan "3")) (a ((href ,url-to-parent-dashboard)) ,(format "up to ~a" url-to-parent))))) `(tr (th ((colspan "3")(class "root")) "Pollen root")))) (define (make-path-row fn) (define filename (->string fn)) (define (file-in-dir? fn) (file-exists? (build-path dir fn))) (define possible-sources (if (directory-exists? fn) empty ;; folders don't have source files (filter file-in-dir? (list (->preproc-source-path filename) (->decoder-source-path filename))))) (define source (and (not (empty? possible-sources)) (->string (car possible-sources)))) `(tr ,@(map make-link-cell (append (list (cond ; main cell [(directory-exists? (build-path dir filename)) ; links subdir to its dashboard (cons (format "~a/~a" filename DASHBOARD_NAME) (format "~a/" filename))] [source (cons #f `(a ((href ,filename)) ,filename (span ((class "file-ext")) "." ,(get-ext source))))] [else (cons filename filename)]) (cond ; in cell [source (cons (format "in/~a" source) "in")] [(or (ptree-source? filename) (sourceish? filename)) (cons (format "in/~a" filename) "in")] [else empty-cell]) (cond ; out cell [(directory-exists? (build-path dir filename)) (cons #f #f)] [(ptree-source? filename) empty-cell] [else (cons (format "out/~a" filename) "out")])))))) (define (ineligible-path? x) (or (not (visible? x)) (member x RESERVED_PATHS))) (define (unique-sorted-output-paths xs) (define output-paths (map ->output-path xs)) (define (unique-members xs) (set->list (list->set xs))) (define all-paths (unique-members output-paths)) (define path-is-directory? (λ(f) (directory-exists? (build-path dir f)))) (define subdirectories (filter path-is-directory? all-paths)) (define files (filter-not path-is-directory? all-paths)) (define ptree-sources (filter ptree-source? files)) (define other-files (filter-not ptree-source? files)) (define (sort-names xs) (sort xs #:key ->string stringpath (ptree->list (file->ptree dashfile))) (unique-sorted-output-paths (directory-list dir))))) (body-wrapper `(table ,@(cons (make-parent-row) (map make-path-row project-paths))))) (define route-dashboard (route-wrapper dashboard)) (define (get-query-value url key) ; query is parsed as list of pairs, key is symbol, value is string ; '((key . "value") ... ) (let ([result (memf (λ(x) (equal? (car x) key)) (url-query url))]) (and result (cdar result)))) (define/contract (req->path req) (request? . -> . path?) (reroot-path (url->path (request-uri req)) PROJECT_ROOT)) ;; default route (define (route-default req) (logger req) (define force (equal? (get-query-value (request-uri req) 'force) "true")) (render (req->path req) #:force force) (next-dispatcher)) ;; 404 route (define/contract (route-404 req) (request? . -> . response?) (define error-text (format "route-404: Can't find ~a" (->string (req->path req)))) (message error-text) ;`(html ,(slurp (build-path SERVER_EXTRAS_DIR "404.html"))) (response/xexpr `(html ,error-text))) ;; server route that returns xexpr (before conversion to html) (define/contract (xexpr path) (complete-path? . -> . xexpr?) (format-as-code (~v (file->xexpr path)))) (define route-xexpr (route-wrapper xexpr)) (module+ main (parameterize ([current-directory (build-path (current-directory) "foobar")]) (reset-project-root) ; (message PROJECT_ROOT) ; (make-binary-info-page (build-path "foo.gif")) ))