48 lines
2.0 KiB
Scheme
48 lines
2.0 KiB
Scheme
; A R7RS port of "simple echo server" example in SRFI 106
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;
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; Copyright (C) Takashi Kato (2012). All Rights Reserved.
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this software and associated documentation files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in
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; all copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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; SOFTWARE.
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(import (scheme base)
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(srfi 106))
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(define echo-server-socket (make-server-socket "5000"))
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(define (server-run)
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(define (get-line-from-binary-port bin)
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(utf8->string
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(call-with-port (open-output-bytevector)
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(lambda (out)
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(let loop ((b (read-u8 bin)))
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(case b
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((10) (get-output-bytevector out))
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((13) (loop (read-u8 bin)))
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(else (write-u8 b out) (loop (read-u8 bin)))))))))
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(call-with-socket (socket-accept echo-server-socket)
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(lambda (sock)
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(let ((in (socket-input-port sock))
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(out (socket-output-port sock)))
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(let loop ((r (get-line-from-binary-port in)))
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(write-bytevector (string->utf8 (string-append r "\r\n")) out)
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(loop (get-line-from-binary-port in)))))))
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(server-run)
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