diff --git a/scheme/httpd/surflets/utilities.scm b/scheme/httpd/surflets/utilities.scm deleted file mode 100644 index 00ab6ad..0000000 --- a/scheme/httpd/surflets/utilities.scm +++ /dev/null @@ -1,258 +0,0 @@ -;; utilities for plugin (servlets) -;; Copyright 2002, Andreas Bernauer - -(define (send-html/suspend html-tree-maker) - (send/suspend - (lambda (new-url) - (make-usual-html-response - (lambda (out options) - (servlet-XML->HTML out (html-tree-maker new-url))))))) - -(define (send-html/finish html-tree) - (do-sending send/finish html-tree)) - -(define (send-html html-tree) - (do-sending send html-tree)) - -(define (do-sending send html-tree) - (send (make-usual-html-response - (lambda (out options) - (servlet-XML->HTML out html-tree))))) - -(define (make-usual-html-response writer-proc) - (make-response - http-status/ok - (status-code->text http-status/ok) - (time) - "text/html" - '() - (make-writer-body writer-proc))) - -;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; -;;; from cgi-script: -;;; Return the form data as an alist of decoded strings. -;;; So a query string like "button=on&reply=Oh,%20yes" becomes alist -;;; (("button" . "on") ("reply" . "Oh, yes")) -;;; This only works for GET and POST methods. - -(define form-query parse-html-form-query) - -(define (extract-bindings bindings key) - (let ((key (if (symbol? key) (symbol->string key) key))) - (filter (lambda (binding) - (equal? (car binding) key)) - bindings))) - -(define (extract-single-binding bindings key) - (let ((key-bindings (extract-bindings bindings key))) - (if (= 1 (length key-bindings)) - (cdar key-bindings) - (error "extract-one-binding: more than one or zero bindings found" - (length key-bindings) - key bindings)))) - - -;; adapted from Oleg's SXML-tree-trans.scm -;; extended by port argument -;; #t: current-output-port -;; #f: string -;; port: port -;; else: error -(define (formated-reply port . fragments) - (cond - ((not port) - (call-with-string-output-port - (lambda (port) - (real-formated-reply port fragments)))) - ((eq? port #t) - (real-formated-reply (current-output-port) fragments)) - ((output-port? port) - (real-formated-reply port fragments)) - (else - (error "invalid port argument to FORMATED-REPLY" port)))) - -(define (real-formated-reply port fragments) - (let loop ((fragments fragments) (result #f)) - (cond - ((null? fragments) result) - ((not (car fragments)) (loop (cdr fragments) result)) - ((null? (car fragments)) (loop (cdr fragments) result)) - ((pair? (car fragments)) - (loop (cdr fragments) (loop (car fragments) result))) - ((procedure? (car fragments)) - ((car fragments)) - (loop (cdr fragments) #t)) - (else - (display (car fragments) port) - (loop (cdr fragments) #t))))) - -;; adapted from Oleg's SXML-to-HTML.scm -;; extended by additional port argument -(define (servlet-XML->HTML out html-tree) - (formated-reply out - (pre-post-order html-tree - ;; Universal transformation rules. Work for every HTML, - ;; present and future - `(,@default-rules - (form *preorder* . - ,(lambda (trigger call-back-function . elems) - (list "
") - (list "\">\n" (parse-form-elems elems) "")))))) - - ))) - -(define (parse-form-elems elems) - (map (lambda (elem) - (if (input-field? elem) - (post-order (input-field-HTML-tree elem) default-rules) - (post-order elem default-rules))) - elems)) - -(define text-html-rule - `(*text* . ,(lambda (trigger str) - (if (string? str) (string->goodHTML str) str)))) -(define default-rules - `((@ ; local override for attributes - ((*default* - . ,(lambda (attr-key . value) ((enattr attr-key) value)))) - . ,(lambda (trigger . value) (list '@ value))) - (*default* . ,(lambda (tag . elems) (apply (entag tag) elems))) - ,text-html-rule - (URL . ,(lambda (tag URI text) (list "" text "")))) - ) - -(define (make-callback function) - (call-with-current-continuation - (lambda (exit) - (let* ((req (send/suspend (lambda (new-url) - (exit new-url)))) - (bindings (form-query (http-url:search (request:url req))))) - (function bindings))))) - -(define-record-type input-field :input-field - (make-input-field name transformer HTML-tree) - input-field? - (name input-field-name) - (transformer input-field-transformer) - (attributes input-field-attributes) - (HTML-tree input-field-HTML-tree)) - -(define-record-discloser :input-field - (lambda (input-field) - (list 'input-field (input-field-name input-field)))) - -;; FIXME: consider creating small names -(define generate-input-field-name - (let ((id 0)) - (lambda (type-string) - (set! id (+ 1 id)) - (string-append type-string (number->string id))))) - -(define identity (lambda (a) a)) - -(define (make-text-input-field . maybe-further-attributes) - (let ((name (generate-input-field-name "text"))) - (make-input-field name - identity - `(input (@ (type "text") - (name ,name) - ,@maybe-further-attributes))))) - -(define (make-number-input-field . maybe-further-attributes) - (let ((name (generate-input-field-name "number"))) - (make-input-field name - (lambda (string) - (or (string->number string) - (error "wrong type"))) - `(input (@ (type "text") - (name ,name) - ,@maybe-further-attributes))))) - -(define (make-password-input-field . maybe-further-attributes) - (let ((name (generate-input-field-name "password"))) - (make-input-field name - identity - `(input (@ (type "password") - (name ,name) - ,@maybe-further-attributes))))) - -(define (make-textarea-input-field . maybe-further-attributes) - (let ((name (generate-input-field-name "textarea")) - (default-text (if (and (pair? maybe-further-attributes) - (string? (car maybe-further-attributes))) - (car maybe-further-attributes) - '()))) - (make-input-field name - identity - `(textarea (@ (type "textarea") - (name ,name) - ,@maybe-further-attributes) - ,default-text)))) - -(define (make-select-input-field options . maybe-further-attributes) - (let ((name (generate-input-field-name "select"))) - (make-input-field name - (lambda (select) - select) ;FIXME[extension] refer to list elements - `(select (@ ((name ,name) - ,@maybe-further-attributes)) - #\newline - ,@(map (lambda (option) - (if (pair? option) ; with attributes? - `(option (@ ,@(cdr option)) ,(car option)) - `(option ,option))) - options))))) - -;; in work -(define (make-radio-input-field values . maybe-further-attributes) - (let ((name (generate-input-field-name "radio"))) - (make-input-field name - (lambda (select) - select) ;FIXME refer to list elements - (map (lambda (value) - `((input (@ ((type "radio") - (name ,name) - ,@maybe-further-attributes - ,(if (pair? value) ; with attributes? - (cdr value) - '())))) ;FIXME: add value field - ,(if (pair? value) ; with attributes? - (car value) - value))) - values)))) - - - - - - -(define (make-submit-button . maybe-further-attributes) - (if (and (pair? maybe-further-attributes) - (string? (car maybe-further-attributes))) - `(input (@ (type "submit") - (value ,(car maybe-further-attributes)) - ,@maybe-further-attributes)) - `(input (@ (type "submit") - ,@maybe-further-attributes)))) - -(define (input-field-value input-field bindings) - (cond - ((assoc (input-field-name input-field) bindings) => - (lambda (binding) - ((input-field-transformer input-field) (cdr binding)))) - (else - (error "no such input-field" input-field bindings)))) - - -(define number-input-field (make-number-input-field)) - -(define test - `(html - (title "My Title") - (body - (p (URL "reset" "click here to reset")) - (p (form "return-URI" (table (tr (td "Enter a number ") (td ,number-input-field ))) - ,(make-submit-button)))))) -