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|
#!/usr/bin/env guile \
-e main -s
!#
;; Minimal web server can be started from command line. Current example routes:
;;
;; localhost:8080/
;;
(use-modules
(json)
(ice-9 match)
(ice-9 format)
(ice-9 iconv)
(ice-9 receive)
(ice-9 string-fun)
;; (ice-9 debugger)
;; (ice-9 breakpoints)
;; (ice-9 source)
(srfi srfi-1)
(srfi srfi-11) ; let-values
(srfi srfi-19) ; time
(srfi srfi-26)
(rnrs io ports) ; bytevector-all
(web http)
(web client)
(web request)
(web response)
(web uri)
(fibers web server)
(gn cache memoize)
(web gn-uri)
(gn db sparql)
(gn data species)
(gn data group)
(web sxml)
(web view view)
(web view doc))
(define info `(
("name" . "GeneNetwork REST API")
("version" . ,get-version)
("comment" . "This is the official REST API for the GeneNetwork service hosted at https://genenetwork.org/")
("license" . (("source code (unless otherwise specified)" . "Affero GNU Public License 3.0 (AGPL3)")
("data (unless otherwise specified)" . "Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)")))
("note" . "This is work in progress (WIP). Note that the final base URL will change! The temporary prefix is:")
("prefix" . ,(prefix))
("links". (("species" . ,(mk-meta "species"))))))
(define info-meta `(
("doc" . ,(mk-html "info"))
("API" .
((,(mk-url "species")."Get a list of all species")
(,(mk-url "mouse")."Get information on mouse")
(,(mk-url "datasets")."Get a list of datasets")))))
(define (get-id-data id)
"Get data based on identifier id. If it is a taxon return the taxon data,
otherwise search for set/group data"
(let ([taxoninfo (get-expanded-taxon-data id)])
(if taxoninfo
taxoninfo
(cdr (get-group-data id)))))
;; ---- REST API web server handler
(define (not-found2 request)
(values (build-response #:code 404)
(string-append "Resource X not found: "
(uri->string (request-uri request)))))
(define (not-found uri)
(list (build-response #:code 404)
(string-append "Resource not found: " (uri->string uri))))
(define file-mime-types
'(("css" . (text/css))
("js" . (text/javascript))
("svg" . (image/svg+xml))
("png" . (image/png))
("gif" . (image/gif))
("jpg" . (image/jpg))
("woff" . (application/font-woff))
("ttf" . (application/octet-stream))
("map" . (text/json))
("html" . (text/html))))
(define (file-extension file-name)
(last (string-split file-name #\.)))
(define* (render-static-image file-name #:key (extra-headers '()))
(let* ((stat (stat file-name #f))
(modified (and stat
(make-time time-utc 0 (stat:mtime stat)))))
(list `((content-type . ,(assoc-ref file-mime-types
(file-extension file-name)))
(last-modified . ,(time-utc->date modified)))
(call-with-input-file file-name get-bytevector-all))))
(define* (render-static-file path #:optional rec #:key (extra-headers '()))
(let* ((stat (stat path #f))
(modified (and stat
(make-time time-utc 0 (stat:mtime stat)))))
(list `((content-type . ,(assoc-ref file-mime-types
(file-extension path)))
(last-modified . ,(time-utc->date modified)))
(call-with-input-file path get-bytevector-all))))
(define* (render-doc path page #:optional rec #:key (extra-headers '()))
(list (append extra-headers
'((content-type . (text/html))))
(lambda (port)
(sxml->html (view-doc path page rec) port))))
(define* (render-brand path #:optional rec #:key (extra-headers '()))
(list (append extra-headers
'((content-type . (text/html))))
(lambda (port)
(sxml->html (view-brand path) port))))
(define (render-json json)
(list '((content-type . (application/json)))
(lambda (port)
(scm->json json port))))
(define (render-json-string2 json)
(list '((content-type . (text/plain)))
(lambda (port)
(format port "~a" "foo"))))
(define (controller request body)
(match-lambda
(('GET)
(render-json info))
(('GET "version")
(render-json get-version))
(('GET "css" fn )
(render-static-file (string-append "css/" fn)))
(('GET "map" fn )
(render-static-file (string-append "css/" fn)))
(('GET "static" "images" fn)
(render-static-image (string-append "static/images/" fn)))
(('GET "home" path)
(render-brand path))
(('GET "doc" "species.html")
(render-doc "doc" "species.html" (get-species-meta)))
(('GET "doc" taxon)
(match (string->list taxon)
[(name ... #\. #\h #\t #\m #\l)
(render-doc "doc" taxon (get-expanded-taxon-meta (list->string name)))]))
(('GET "doc" path ... page) ; serve documents from /doc/
(render-doc path page))
(('GET "species.json")
(render-json (get-species-data)))
(('GET "species.meta.json")
(render-json (get-species-meta)))
(('GET "species")
(render-json (get-species-meta)))
(('GET id)
(let ([names (get-species-shortnames (get-expanded-species))])
(match (string->list id)
[(name ... #\. #\m #\e #\t #\a #\. #\j #\s #\o #\n) (render-json (get-expanded-taxon-meta (list->string name)))]
[(name ... #\. #\j #\s #\o #\n) (render-json
(get-id-data (list->string name)))]
[rest (render-json "NOP")])))
(_ (not-found (request-uri request)))
))
(define (request-path-components request)
(split-and-decode-uri-path (uri-path (request-uri request))))
(define (handler request body)
(format #t "~a ~a\n"
(request-method request)
(uri-path (request-uri request)))
(apply values
((controller request body)
(cons (request-method request)
(request-path-components request)))))
(define (start-web-server address port)
(format (current-error-port)
"GN REST API web server listening on http://~a:~a/~%"
address port)
;; Wrap handler in another function to support live hacking via the
;; REPL. If handler is passed as is and is then redefined via the
;; REPL, the web server will still be using the old handler. The
;; only way to update the handler reference held by the web server
;; would be to restart the web server.
(run-server (cut handler <> <>)
#:addr (inet-pton AF_INET address)
#:port port))
(define (main args)
(write (string-append "Starting Guile REST API " get-version " server!"))
(write args)
(newline)
(let ((listen (inexact->exact (string->number (car (cdr args))))))
(display `("listening on" ,listen))
;; (write listen)
;; (run-server hello-world-handler 'http `(#:port ,listen))))
(start-web-server "127.0.0.1" listen)))
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