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exception handling

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svn: r2140
This commit is contained in:
Jay McCarthy 2006-02-06 17:14:09 +00:00
parent a6f8344c09
commit 647fc4e58a
1 changed files with 77 additions and 62 deletions
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139
collects/web-server/response.ss
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@ -110,63 +110,68 @@
(define DAYS
#("Sun" "Mon" "Tue" "Wed" "Thu" "Fri" "Sat"))
;; **************************************************
;; output-response: connection response -> void
(define (ext:output-response conn resp)
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-response conn resp)
(flush-output (connection-o-port conn)))))
(if (connection-close? conn)
(raise 'output-response "Attempt to output on closed connection.")
(with-handlers ([exn? (lambda (exn)
(kill-connection! conn)
(raise exn))])
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-response conn resp)
(flush-output (connection-o-port conn)))))))
(define (output-response conn resp)
(cond
[(response/full? resp)
(output-response/basic
conn resp (response/full->size resp)
(lambda (o-port)
(for-each
(lambda (str) (display str o-port))
(response/full-body resp))))]
[(response/incremental? resp)
(output-response/incremental conn resp)]
[(and (pair? resp) (bytes? (car resp)))
(output-response/basic
conn
(make-response/basic 200 "Okay" (current-seconds) (car resp) '())
(apply + (map
(lambda (c)
(if (string? c)
(string-length c)
(bytes-length c)))
(cdr resp)))
(lambda (o-port)
(for-each
(lambda (str) (display str o-port))
(cdr resp))))]
[else
;; TODO: make a real exception for this.
(with-handlers
([exn:invalid-xexpr?
(lambda (exn)
(output-response/method
conn
(xexpr-exn->response exn resp)
'ignored))]
[exn? (lambda (exn)
(raise exn))])
(let ([str (and (validate-xexpr resp) (xexpr->string resp))])
(output-response/basic
conn
(make-response/basic 200
"Okay"
(current-seconds)
TEXT/HTML-MIME-TYPE
'())
(add1 (string-length str))
(lambda (o-port)
(display str o-port)
(newline o-port)))))]))
(cond
[(response/full? resp)
(output-response/basic
conn resp (response/full->size resp)
(lambda (o-port)
(for-each
(lambda (str) (display str o-port))
(response/full-body resp))))]
[(response/incremental? resp)
(output-response/incremental conn resp)]
[(and (pair? resp) (bytes? (car resp)))
(output-response/basic
conn
(make-response/basic 200 "Okay" (current-seconds) (car resp) '())
(apply + (map
(lambda (c)
(if (string? c)
(string-length c)
(bytes-length c)))
(cdr resp)))
(lambda (o-port)
(for-each
(lambda (str) (display str o-port))
(cdr resp))))]
[else
;; TODO: make a real exception for this.
(with-handlers
([exn:invalid-xexpr?
(lambda (exn)
(output-response/method
conn
(xexpr-exn->response exn resp)
'ignored))]
[exn? (lambda (exn)
(raise exn))])
(let ([str (and (validate-xexpr resp) (xexpr->string resp))])
(output-response/basic
conn
(make-response/basic 200
"Okay"
(current-seconds)
TEXT/HTML-MIME-TYPE
'())
(add1 (string-length str))
(lambda (o-port)
(display str o-port)
(newline o-port)))))]))
;; response/full->size: response/full -> number
;; compute the size for a response/full
@ -181,10 +186,15 @@
;; **************************************************
;; output-file: connection path symbol bytes -> void
(define (ext:output-file conn file-path method mime-type)
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-file conn file-path method mime-type)
(flush-output (connection-o-port conn)))))
(if (connection-close? conn)
(raise 'output-response "Attempt to output on closed connection.")
(with-handlers ([exn? (lambda (exn)
(kill-connection! conn)
(raise exn))])
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-file conn file-path method mime-type)
(flush-output (connection-o-port conn)))))))
(define (output-file conn file-path method mime-type)
(output-headers conn 200 "Okay"
@ -202,11 +212,16 @@
;; output-response/method: connection response/full symbol -> void
;; If it is a head request output headers only, otherwise output as usual
(define (ext:output-response/method conn resp meth)
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-response/method conn resp meth)
(flush-output (connection-o-port conn)))))
(if (connection-close? conn)
(raise 'output-response "Attempt to output on closed connection.")
(with-handlers ([exn? (lambda (exn)
(kill-connection! conn)
(raise exn))])
(call-with-semaphore (connection-mutex conn)
(lambda ()
(output-response/method conn resp meth)
(flush-output (connection-o-port conn)))))))
(define (output-response/method conn resp meth)
(cond
[(eqv? meth 'head)