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8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
72 lines
2.7 KiB
Scheme
72 lines
2.7 KiB
Scheme
;; Copyright (c) 2012 Alex Shinn. All rights reserved.
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;; BSD-style license: http://synthcode.com/license.txt
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(define default-max-requests 10000)
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(define (make-socket-listener-thunk listener port)
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(lambda ()
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(let ((addr (get-address-info #f port)))
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(cond
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((accept listener
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(address-info-address addr)
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(address-info-address-length addr))
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=> (lambda (sock) (list sock addr)))
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(else #f)))))
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(define (make-listener-thunk x)
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(cond
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((integer? x)
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(make-socket-listener-thunk
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(make-listener-socket (get-address-info #f x))
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x))
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((address-info? x)
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(make-socket-listener-thunk (make-listener-socket x) 80))
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((fileno? x)
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(make-socket-listener-thunk x 80))
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((procedure? x)
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x)
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(else
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(error "expected a listener socket, fileno or thunk" x))))
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(define (run-net-server listener-or-addr handler . o)
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(let ((listener-thunk (make-listener-thunk listener-or-addr))
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(max-requests (if (pair? o) (car o) default-max-requests)))
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(define (run sock addr count)
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(log-debug "net-server: accepting request:" count)
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(let ((ports
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(protect (exn
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(else
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(log-error "net-server: couldn't create port:" sock)
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(close-file-descriptor sock)))
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(cons (open-input-file-descriptor sock)
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(open-output-file-descriptor sock)))))
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(protect (exn
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(else (log-error "net-server: error in request:" count)
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(print-exception exn)
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(print-stack-trace exn)
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(close-input-port (car ports))
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(close-output-port (cdr ports))
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(close-file-descriptor sock)))
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(handler (car ports) (cdr ports) sock addr)
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(flush-output (cdr ports))
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(close-input-port (car ports))
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(close-output-port (cdr ports))
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(close-file-descriptor sock)))
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(log-debug "net-server: finished: " count))
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(let ((requests 0))
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(let serve ((count 0))
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(if (>= requests max-requests)
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(thread-yield!)
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(let ((sock+addr (listener-thunk)))
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(cond
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((not sock+addr)
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(serve count))
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(else
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(thread-start!
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(make-thread
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(lambda ()
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(set! requests (+ requests 1))
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(run (car sock+addr) (cadr sock+addr) count)
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(set! requests (- requests 1)))
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(string-append "net-client-" (number->string count))))
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(serve (+ 1 count))))))))))
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