Contents are now in packages.scm.
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modules.scm
975
modules.scm
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;;; Scheme 48 module definitions for TCP/IP protocol suites.
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;;; Copyright (c) 1995 by Olin Shivers.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Utilities / nice things
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; format-net
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(define-interface format-net-interface
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(export format-internet-host-address
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format-port))
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(define-structure format-net format-net-interface
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(open scsh
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scheme
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let-opt) ; :optional
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(files format-net))
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;;; sunet utilities
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(define-interface sunet-utilities-interface
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(export host-name-or-ip
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on-interrupt))
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(define-structure sunet-utilities sunet-utilities-interface
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(open scsh
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scheme
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format-net
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sigevents
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handle-fatal-error)
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(files sunet-utilities))
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;;; rate limit
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(define-interface rate-limit-interface
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(export make-rate-limiter
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rate-limit-block
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rate-limit-open
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rate-limit-close
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rate-limiter-current-requests))
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(define-structure rate-limit rate-limit-interface
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(open scheme
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define-record-types
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locks
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signals)
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(files rate-limit))
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;;; CRLF-IO
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(define-interface crlf-io-interface
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(export read-crlf-line
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read-crlf-line-timeout
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write-crlf))
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(define-structure crlf-io crlf-io-interface
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(open ascii ; ascii->char
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scsh ; read-line write-string force-output
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receiving ; MV return (RECEIVE and VALUES)
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let-opt ; let-optionals
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threads ; sleep
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scheme)
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(files crlf-io))
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;;; ecm utilities
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;; some utilities for the ecm-stuff (ftp, pop3, smtp, nettime)
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;; hope we can vanish this soon
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(define-interface ecm-utilities-interface
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(export system-fqdn
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safe-first
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safe-second
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write-crlf
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dump))
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(define-structure ecm-utilities ecm-utilities-interface
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(open scsh
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string-lib
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scheme)
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(files ecm-utilities))
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;;; parse-html-forms
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;;; For parsing submissions from HTML forms.
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(define-interface parse-html-forms-interface
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(export parse-html-form-query unescape-uri+))
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(define-structure parse-html-forms parse-html-forms-interface
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(open scsh
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scsh-utilities
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let-opt
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string-lib
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receiving
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uri
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scheme)
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(files parse-forms))
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;;; htmlout
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(define-interface htmlout-interface
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(export emit-tag
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emit-close-tag
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emit-p
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emit-title
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emit-header ; And so forth...
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with-tag
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with-tag*
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escape-html
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emit-text))
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(define-structure htmlout htmlout-interface
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(open scsh scsh-utilities string-lib formats ascii receiving scheme)
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(files htmlout))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Clients / RFC
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; SMTP
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(define-interface smtp-interface
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(export sendmail %sendmail
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expn vrfy mail-help
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smtp-transactions
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smtp-transactions/no-close
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smtp/open smtp/helo smtp/mail smtp/rcpt smtp/data
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smtp/send smtp/soml smtp/saml smtp/rset smtp/expn
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smtp/help smtp/noop smtp/quit smtp/turn
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handle-smtp-reply
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read-smtp-reply
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parse-smtp-reply
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smtp-stuff))
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(define-interface smtp-internals-interface
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(export read-crlf-line ; These two should be in an
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write-crlf ; auxiliary module.
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smtp-query
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nullary-smtp-command
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unary-smtp-command))
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(define-structures
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((smtp smtp-interface)
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(smtp-internals smtp-internals-interface))
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(open scsh ; write-string read-string/partial force-output
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; system-name user-login-name and sockets
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crlf-io ; read-crlf-line write-crlf
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receiving ; values receive
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let-opt ; let-optionals
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error-package ; error
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scheme)
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(files smtp))
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;;; RFC 822
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(define-interface rfc822-interface
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(export read-rfc822-headers
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read-rfc822-field
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%read-rfc822-headers
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%read-rfc822-field
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rejoin-header-lines
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get-header-all
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get-header-lines
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get-header
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))
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(define-structure rfc822 rfc822-interface
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(open receiving ; MV return (RECEIVE and VALUES)
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scsh-utilities ; index
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string-lib
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let-opt ; let-optionals
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crlf-io ; read-crlf-line
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ascii ; ascii->char
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error-package ; error
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scsh ; string-join
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scheme)
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(files rfc822))
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;;; URI
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(define-interface uri-interface
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(export parse-uri
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uri-escaped-chars
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unescape-uri
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escape-uri
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resolve-uri
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split-uri-path
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uri-path-list->path
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simplify-uri-path))
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(define-structure uri uri-interface
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(open scsh-utilities
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string-lib
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let-opt
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receiving
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ascii
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char-set-lib
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bitwise
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field-reader-package
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scheme)
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(files uri))
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;;; URL
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(define-interface url-interface
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(export userhost? ; USERHOST
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make-userhost ; record struct
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userhost:user
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userhost:password
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userhost:host
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userhost:port
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set-userhost:user
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set-userhost:password
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set-userhost:host
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set-userhost:port
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parse-userhost ; parse &
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userhost->string ; unparse.
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http-url? ; HTTP-URL
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make-http-url ; record struct
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http-url:userhost
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http-url:path
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http-url:search
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http-url:frag-id
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set-http-url:userhost
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set-http-url:path
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set-http-url:search
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set-http-url:frag-id
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parse-http-url ; parse &
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http-url->string)) ; unparse.
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(define-structure url url-interface
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(open defrec-package
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receiving
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string-lib
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char-set-lib
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uri
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scsh-utilities
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httpd-error
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scheme)
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(files url))
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;;; ftp client
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;; ftp.scm is a module for transfering files between networked
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;; machines using the File Transfer Protocol
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(define-interface ftp-interface
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(export ftp-connect
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ftp-login
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ftp-type
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ftp-rename
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ftp-delete
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ftp-cd
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ftp-cdup
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ftp-pwd
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ftp-rmdir
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ftp-mkdir
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ftp-modification-time
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ftp-size
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ftp-abort
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ftp-quit
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ftp-ls
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ftp-dir
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ftp-get
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ftp-put
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ftp-append
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ftp-quot
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ftp-error?))
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(define-structure ftp ftp-interface
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(open netrc
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scsh
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defrec-package
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receiving
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handle
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conditions
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signals
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error-package
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ecm-utilities
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string-lib
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let-opt
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scheme)
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(files ftp))
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;; obsolete ftp client
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(define-interface ftp-obsolete-interface
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(export ftp:connect
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ftp:login
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ftp:type
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ftp:rename
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ftp:delete
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ftp:cd
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ftp:cdup
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ftp:pwd
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ftp:rmdir
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ftp:mkdir
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ftp:modification-time
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ftp:size
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ftp:abort
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ftp:quit
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ftp:ls
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ftp:dir
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ftp:get
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ftp:put
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ftp:append
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ftp:quot))
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(define-structure ftp-obsolete ftp-obsolete-interface
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(open scsh
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scheme
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ftp)
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(files ftp-obsolete))
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;;; netrc parsing
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;; netrc.scm is a module for parsing ~/.netrc files, to obtain login
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;; and password information for different network hosts.
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(define-interface netrc-interface
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(export user-mail-address
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netrc:lookup
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netrc:lookup-password
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netrc:lookup-login
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netrc:parse
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netrc:try-parse
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netrc-refuse?))
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(define-structure netrc netrc-interface
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(open defrec-package
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records
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scsh
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error-package
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ecm-utilities
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string-lib
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conditions signals handle
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let-opt
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scheme)
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(files netrc))
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;;; POP3 client
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;; pop3.scm is a module for accessing email on a maildrop server,
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;; using the POP3 protocol.
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(define-interface pop3-interface
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(export pop3-connect
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pop3-login
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pop3-stat
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pop3-get
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pop3-headers
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pop3-last
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pop3-delete
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pop3-reset
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pop3-quit))
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(define-structure pop3 pop3-interface
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(open netrc
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scsh
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defrec-package
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handle
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conditions
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signals
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ecm-utilities
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string-lib
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scheme)
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(files pop3))
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;; obsolete pop3
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(define-interface pop3-obsolete-interface
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(export pop3:connect
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pop3:login
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pop3:stat
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pop3:get
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pop3:headers
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pop3:last
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pop3:delete
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pop3:reset
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pop3:quit))
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(define-structure pop3-obsolete pop3-obsolete-interface
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(open scsh
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scheme
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pop3)
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(files pop3-obsolete))
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;;; nettime
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;; nettime.scm is a module for requesting the time on remote machines,
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;; using the time or the daytime protocol
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(define-interface nettime-interface
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(export net-time
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net-daytime))
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(define-structure nettime nettime-interface
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(open scsh
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scheme)
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(files nettime))
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;; obsolete nettime
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(define-structure nettime-obsolete nettime-obsolete-interface
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(open scsh
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scheme
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nettime)
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(files nettime-obsolete))
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(define-interface nettime-obsolete-interface
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(export net:time
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net:daytime))
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;;; ls
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;; clone of unix' ls
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(define-interface ls-interface
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(export ls-crlf?
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ls
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arguments->ls-flags))
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(define-structure ls ls-interface
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(open scheme handle
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big-scheme bitwise
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fluids
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crlf-io
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scsh)
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(files ls))
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;;; DNS
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;; dns.scm is a module to resolve hostnames and ip-addresses.
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;; it implements the rfc1035.
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(define-interface dns-interface
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(export dns-clear-cache
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dns-lookup
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dns-lookup-name
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dns-inverse-lookup
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dns-lookup-ip
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dns-lookup-nameserver
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dns-lookup-mail-exchanger
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concurrent-lookup
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show-dns-message
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force-ip
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force-ip-list
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dns-find-nameserver
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dns-find-nameserver-list))
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(define-structure dns dns-interface
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(open scheme
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scsh
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big-util
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tables
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ascii
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formats
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signals
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defrec-package
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random
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queues
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conditions
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handle
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sort
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threads
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locks)
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(files dns))
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;;; CGI script
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;;; For writing CGI scripts in Scheme.
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(define-interface cgi-script-interface (export cgi-form-query))
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(define-structure cgi-script cgi-script-interface
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(open scsh
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error-package
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parse-html-forms
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scheme)
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(files cgi-script))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Servers
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; HTTPD Web-Server
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;;; httpd-core
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(define-interface httpd-core-interface
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(export httpd
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send-http-error-reply))
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(define-structure httpd-core httpd-core-interface
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(open thread-fluids ; fork-thread
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scsh
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receiving ; receive
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crlf-io ; write-crlf, read-crlf-line
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rfc822 ; read-rfc822-headers
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char-set-lib ; char-set-complement, char-set:whitespace
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handle ; ignore-errors
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conditions ; condition-stuff
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uri
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url
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formats ; format
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format-net ; format-internet-host-address
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rate-limit ; rate-limiting stuff
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string-lib ; STRING-INDEX
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handle-fatal-error
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httpd-read-options
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httpd-error
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httpd-logging
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httpd-request
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httpd-reply-codes
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httpd-text-generation
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scheme)
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(files (httpd core)))
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;;; httpd-make-options
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;;; httpd-read-options
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(define-interface httpd-make-options-interface
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(export with-port
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with-root-directory
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with-fqdn
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with-reported-port
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with-path-handler
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with-server-admin
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with-simultaneous-requests
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with-logfile
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with-syslog?))
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(define-interface httpd-read-options-interface
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(export httpd-options-port
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httpd-options-root-directory
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httpd-options-fqdn
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httpd-options-reported-port
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httpd-options-path-handler
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httpd-options-server-admin
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httpd-options-simultaneous-requests
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httpd-options-logfile
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httpd-options-syslog?))
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(define-structures ((httpd-make-options httpd-make-options-interface)
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(httpd-read-options httpd-read-options-interface))
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(open scheme
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define-record-types)
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(files (httpd options)))
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;;; httpd-access-control
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(define-interface httpd-access-control-interface
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(export access-denier
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access-allower
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access-controller
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access-controlled-handler))
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(define-structure httpd-access-control httpd-access-control-interface
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(open big-scheme
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httpd-reply-codes
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httpd-request
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httpd-error
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string-lib ; STRING-MAP
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scsh
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scheme)
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(files (httpd access-control)))
|
||||
|
||||
|
||||
;;; httpd-error
|
||||
|
||||
(define-interface httpd-error-interface
|
||||
(export http-error?
|
||||
http-error
|
||||
fatal-syntax-error?
|
||||
fatal-syntax-error))
|
||||
|
||||
(define-structure httpd-error httpd-error-interface
|
||||
(open conditions signals handle scheme)
|
||||
(files (httpd error)))
|
||||
|
||||
;;; httpd-fatal-error
|
||||
|
||||
(define-interface handle-fatal-error-interface
|
||||
(export with-fatal-error-handler*
|
||||
(with-fatal-error-handler :syntax)))
|
||||
|
||||
(define-structure handle-fatal-error handle-fatal-error-interface
|
||||
(open scheme conditions handle)
|
||||
(files (httpd handle-fatal-error)))
|
||||
|
||||
;;; httpd-logging
|
||||
|
||||
(define-interface httpd-logging-interface
|
||||
(export init-http-log!
|
||||
*http-syslog?*
|
||||
http-syslog
|
||||
http-log))
|
||||
|
||||
(define-structure httpd-logging httpd-logging-interface
|
||||
(open httpd-read-options
|
||||
i/o ; make-null-output-port
|
||||
locks ; make-lock obtain-lock release-lock
|
||||
receiving ; receive
|
||||
uri ; uri-path-list->path
|
||||
url ; http-url:path
|
||||
httpd-request ; request record
|
||||
formats ; format
|
||||
format-net ; format-internet-host-address
|
||||
string-lib ; string-join, string-trim
|
||||
rfc822 ; get-header
|
||||
sunet-utilities ; on-interrupt
|
||||
threads ; spawn
|
||||
scsh
|
||||
scheme)
|
||||
(files (httpd logging)))
|
||||
|
||||
;; httpd-reply-codes
|
||||
|
||||
(define-interface httpd-reply-codes-interface
|
||||
(export ;; Integer reply codes
|
||||
reply-code->text
|
||||
http-reply/ok
|
||||
http-reply/created
|
||||
http-reply/accepted
|
||||
http-reply/prov-info
|
||||
http-reply/no-content
|
||||
http-reply/mult-choice
|
||||
http-reply/moved-perm
|
||||
http-reply/moved-temp
|
||||
http-reply/method
|
||||
http-reply/not-mod
|
||||
http-reply/bad-request
|
||||
http-reply/unauthorized
|
||||
http-reply/payment-req
|
||||
http-reply/forbidden
|
||||
http-reply/not-found
|
||||
http-reply/method-not-allowed
|
||||
http-reply/none-acceptable
|
||||
http-reply/proxy-auth-required
|
||||
http-reply/timeout
|
||||
http-reply/conflict
|
||||
http-reply/gone
|
||||
http-reply/internal-error
|
||||
http-reply/not-implemented
|
||||
http-reply/bad-gateway
|
||||
http-reply/service-unavailable
|
||||
http-reply/gateway-timeout))
|
||||
|
||||
(define-structure httpd-reply-codes httpd-reply-codes-interface
|
||||
(open defenum-package
|
||||
scheme)
|
||||
(files (httpd reply-codes)))
|
||||
|
||||
;; httpd-request
|
||||
|
||||
(define-interface httpd-request-interface
|
||||
(export make-request ; HTTP request
|
||||
request? ; record type.
|
||||
request:method
|
||||
request:uri
|
||||
request:url
|
||||
request:version
|
||||
request:headers
|
||||
request:socket
|
||||
set-request:method
|
||||
set-request:uri
|
||||
set-request:url
|
||||
set-request:version
|
||||
set-request:headers
|
||||
set-request:socket
|
||||
|
||||
version< version<=
|
||||
v0.9-request?
|
||||
version->string))
|
||||
|
||||
(define-structure httpd-request httpd-request-interface
|
||||
(open define-record-types ;; define-record-discloser
|
||||
defrec-package ;; define-record
|
||||
scheme)
|
||||
(files (httpd request)))
|
||||
|
||||
(define-interface httpd-constants-interface
|
||||
(export server/version
|
||||
server/protocol))
|
||||
|
||||
(define-structure httpd-constants httpd-constants-interface
|
||||
(open scheme)
|
||||
(files (httpd constants)))
|
||||
|
||||
(define-interface httpd-text-generation-interface
|
||||
(export time->http-date-string
|
||||
begin-http-header
|
||||
title-html))
|
||||
|
||||
(define-structure httpd-text-generation httpd-text-generation-interface
|
||||
(open formats
|
||||
httpd-reply-codes ; reply-code->text
|
||||
crlf-io
|
||||
httpd-constants
|
||||
scheme
|
||||
scsh) ; format-date
|
||||
(files (httpd text-generation)))
|
||||
|
||||
|
||||
;; path-handlers
|
||||
|
||||
;;; httpd-basic-handlers
|
||||
|
||||
(define-interface httpd-basic-handlers-interface
|
||||
(export alist-path-dispatcher
|
||||
home-dir-handler
|
||||
tilde-home-dir-handler
|
||||
rooted-file-handler
|
||||
rooted-file-or-directory-handler
|
||||
null-path-handler
|
||||
serve-rooted-file-path
|
||||
file-serve
|
||||
file-server-and-dir
|
||||
http-homedir
|
||||
send-file
|
||||
dotdot-check
|
||||
file-extension->content-type
|
||||
copy-inport->outport))
|
||||
|
||||
(define-structure httpd-basic-handlers httpd-basic-handlers-interface
|
||||
(open scsh ; syscalls
|
||||
formats ; FORMAT
|
||||
httpd-request ; REQUEST record type, v0.9-request
|
||||
httpd-reply-codes ; reply codes
|
||||
httpd-text-generation ; begin-http-header
|
||||
httpd-error ; HTTP-ERROR
|
||||
htmlout
|
||||
conditions ; CONDITION-STUFF
|
||||
url ; HTTP-URL record type
|
||||
handle-fatal-error ; WITH-FATAL-ERROR-HANDLER
|
||||
string-lib ; STRING-JOIN
|
||||
scheme)
|
||||
(files (httpd handlers)))
|
||||
|
||||
|
||||
;;; seval-handler
|
||||
|
||||
(define-interface seval-handler-interface
|
||||
(export seval-handler))
|
||||
|
||||
(define-structure seval-handler seval-handler-interface
|
||||
(open scsh ; syscalls & INDEX
|
||||
httpd-error
|
||||
httpd-request ; v0.9-request
|
||||
httpd-reply-codes
|
||||
httpd-text-generation ; begin-http-header
|
||||
httpd-logging ; http-log
|
||||
uri ; UNESCAPE-URI
|
||||
htmlout ; Formatted HTML output
|
||||
error-package ; ERROR
|
||||
pp ; Pretty-printer
|
||||
string-lib ; STRING-SKIP
|
||||
rfc822
|
||||
toothless-eval ; EVAL-SAFELY
|
||||
handle ; IGNORE-ERROR
|
||||
parse-html-forms ; PARSE-HTML-FORM-QUERY
|
||||
threads ; SLEEP
|
||||
scheme)
|
||||
(files (httpd seval)))
|
||||
|
||||
|
||||
|
||||
;;; info-gateway
|
||||
|
||||
(define-interface info-gateway-interface
|
||||
(export info-handler
|
||||
find-info-file
|
||||
info-gateway-error))
|
||||
|
||||
(define-structure info-gateway info-gateway-interface
|
||||
(open big-scheme
|
||||
string-lib
|
||||
conditions signals handle
|
||||
htmlout
|
||||
httpd-request
|
||||
httpd-text-generation
|
||||
httpd-reply-codes
|
||||
httpd-error
|
||||
url
|
||||
uri
|
||||
scsh
|
||||
handle-fatal-error
|
||||
scheme)
|
||||
(files (httpd info-gateway)))
|
||||
|
||||
|
||||
;;; rman-gateway
|
||||
|
||||
(define-interface rman-gateway-interface
|
||||
(export rman-handler
|
||||
man
|
||||
parse-man-entry
|
||||
cat-man-page
|
||||
find-man-file
|
||||
file->man-directory
|
||||
cat-n-decode
|
||||
nroff-n-decode))
|
||||
|
||||
(define-structure rman-gateway rman-gateway-interface
|
||||
(open httpd-reply-codes
|
||||
httpd-request
|
||||
httpd-text-generation
|
||||
httpd-error
|
||||
conditions
|
||||
url
|
||||
uri
|
||||
htmlout
|
||||
httpd-basic-handlers
|
||||
handle-fatal-error
|
||||
scsh
|
||||
let-opt
|
||||
string-lib
|
||||
scheme)
|
||||
(files (httpd rman-gateway)))
|
||||
|
||||
|
||||
;;; CGI Server
|
||||
|
||||
;;; Provides the server interface to CGI scripts.
|
||||
(define-interface cgi-server-interface
|
||||
(export cgi-default-bin-path
|
||||
cgi-handler))
|
||||
|
||||
(define-structure cgi-server cgi-server-interface
|
||||
(open string-lib
|
||||
rfc822
|
||||
crlf-io ; WRITE-CRLF
|
||||
uri
|
||||
url ; HTTP-URL record type
|
||||
httpd-constants
|
||||
httpd-logging
|
||||
httpd-request
|
||||
httpd-reply-codes
|
||||
httpd-basic-handlers ; HTTP-HOMEDIR, SERVE-ROOTED-FILE-PATH
|
||||
httpd-error ; HTTP-ERROR
|
||||
scsh-utilities ; INDEX
|
||||
scsh ; syscalls
|
||||
formats ; format
|
||||
format-net ; FORMAT-INTERNET-HOST-ADDRESS
|
||||
sunet-utilities ; host-name-or-empty
|
||||
let-opt ; let-optionals
|
||||
scheme)
|
||||
(files (httpd cgi-server)))
|
||||
|
||||
|
||||
;;; FTP server: ftpd
|
||||
|
||||
(define-interface ftpd-interface
|
||||
(export ftpd
|
||||
ftpd-inetd))
|
||||
|
||||
(define-structure ftpd ftpd-interface
|
||||
(open scsh
|
||||
conditions handle signals
|
||||
structure-refs
|
||||
handle-fatal-error
|
||||
scheme
|
||||
threads threads-internal ; last one to get CURRENT-THREAD
|
||||
locks
|
||||
thread-fluids ; fork-thread
|
||||
fluids
|
||||
string-lib
|
||||
big-util
|
||||
defrec-package
|
||||
crlf-io
|
||||
ls
|
||||
let-opt
|
||||
receiving ; RECEIVE
|
||||
format-net) ; pretty print of internet-addresses
|
||||
(access big-scheme)
|
||||
(files ftpd))
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
;;; else: TOOTHLESS
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
;;; -*- Scheme -*-
|
||||
;;; This file defines a Scheme 48 module that is R4RS without features
|
||||
;;; that could examine or effect the file system. You can also use it
|
||||
;;; as a model of how to execute code in other protected environments
|
||||
;;; in S48.
|
||||
;;;
|
||||
;;; Copyright (c) 1995 by Olin Shivers.
|
||||
|
||||
(define-interface loser-interface (export loser))
|
||||
|
||||
(define-structure loser (export loser)
|
||||
(open scheme error-package)
|
||||
(begin (define (loser name)
|
||||
(lambda x (error "Illegal call" name)))))
|
||||
|
||||
;;; The toothless structure is R4RS without the dangerous procedures.
|
||||
|
||||
(define-interface toothless-interface (interface-of scheme))
|
||||
|
||||
(define-structure toothless toothless-interface
|
||||
(open scheme loser)
|
||||
(begin
|
||||
(define call-with-input-file (loser "call-with-input-file"))
|
||||
(define call-with-output-file (loser "call-with-output-file"))
|
||||
(define load (loser "load"))
|
||||
(define open-input-file (loser "open-input-file"))
|
||||
(define open-output-file (loser "open-output-file"))
|
||||
(define transcript-on (loser "transcript-on"))
|
||||
(define with-input-from-file (loser "with-input-from-file"))
|
||||
(define with-input-to-file (loser "with-input-to-file"))
|
||||
(define eval (loser "eval"))
|
||||
(define interaction-environment (loser "interaction-environment"))
|
||||
(define scheme-report-environment (loser "scheme-report-environment"))))
|
||||
|
||||
;;; (EVAL-SAFELEY exp)
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
;;; Create a brand new package, import the TOOTHLESS structure, and
|
||||
;;; evaluate EXP in it. When the evaluation is done, you throw away
|
||||
;;; the environment, so EXP's side-effects don't persist from one
|
||||
;;; EVAL-SAFELY call to the next. If EXP raises an error exception,
|
||||
;;; we abort and return #f.
|
||||
|
||||
(define-interface toothless-eval-interface (export eval-safely))
|
||||
|
||||
(define-structure toothless-eval toothless-eval-interface
|
||||
(open evaluation ; eval
|
||||
package-commands-internal ; config-package, get-reflective-tower
|
||||
packages ; structure-package, make-simple-package
|
||||
environments ; environment-ref
|
||||
handle ; ignore-errors
|
||||
scheme)
|
||||
(access toothless) ; Force it to be loaded.
|
||||
(begin
|
||||
|
||||
(define toothless-struct (environment-ref (config-package) 'toothless))
|
||||
(define toothless-package (structure-package toothless-struct))
|
||||
|
||||
(define (new-safe-package)
|
||||
(make-simple-package (list toothless-struct) #t
|
||||
(get-reflective-tower toothless-package) ; ???
|
||||
'safe-env))
|
||||
|
||||
(define (eval-safely exp)
|
||||
(ignore-errors (lambda () (eval exp (new-safe-package)))))))
|
||||
|
||||
|
||||
Loading…
Reference in New Issue