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20 lines
902 B
Scheme
20 lines
902 B
Scheme
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(define (with-net-io host service proc)
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(let lp ((addr (get-address-info host service #f)))
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(if (not addr)
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(error "couldn't find address" host service)
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(let ((sock (socket (address-info-family addr)
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(address-info-socket-type addr)
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(address-info-protocol addr))))
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(if (negative? sock)
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(lp (address-info-next addr))
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(if (negative?
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(connect sock
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(address-info-address addr)
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(address-info-address-length addr)))
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(lp (address-info-next addr))
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(let ((in (open-input-file-descriptor sock))
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(out (open-output-file-descriptor sock)))
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(let ((res (proc in out)))
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(close-input-port in)
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res))))))))
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