91 lines
2.6 KiB
Factor
91 lines
2.6 KiB
Factor
! Copyright (C) 2004, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: httpd-responder
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USING: hashtables httpd kernel namespaces sequences streams
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strings ;
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! Responders are called in a new namespace with these
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! variables:
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! - method -- one of get, post, or head.
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! - request -- the entire URL requested, including responder
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! name
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! - raw-query -- raw query string
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! - query -- an alist of query parameters, eg
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! foo.bar?a=b&c=d becomes
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! [ [[ "a" "b" ]] [[ "c" "d" ]] ]
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! - header -- an alist of headers from the user's client
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! - response -- an alist of the POST request response
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: <responder> ( -- responder )
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<namespace> [
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( url -- )
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[
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drop "GET method not implemented" httpd-error
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] "get" set
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( url -- )
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[
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drop "POST method not implemented" httpd-error
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] "post" set
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( url -- )
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[
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drop "HEAD method not implemented" httpd-error
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] "head" set
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( url -- )
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[
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drop bad-request
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] "bad" set
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] extend ;
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: get-responder ( name -- responder )
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"httpd-responders" get hash [
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"404" "httpd-responders" get hash
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] unless* ;
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: default-responder ( -- responder )
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"default" get-responder ;
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: set-default-responder ( name -- )
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get-responder "default" "httpd-responders" get set-hash ;
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: responder-argument ( argument -- argument )
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dup empty? [ drop "default-argument" get ] when ;
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: call-responder ( method argument responder -- )
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[ responder-argument swap get call ] bind ;
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: serve-default-responder ( method url -- )
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default-responder call-responder ;
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: serve-explicit-responder ( method url -- )
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"/" split1 dup [
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swap get-responder call-responder
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] [
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! Just a responder name by itself
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drop "request" get "/" cat2 redirect drop
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] ifte ;
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: log-responder ( url -- )
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"Calling responder " swap cat2 log ;
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: trim-/ ( url -- url )
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#! Trim a leading /, if there is one.
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"/" ?string-head drop ;
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: serve-responder ( method url -- )
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#! Responder URLs come in two forms:
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#! /foo/bar... - default-responder used
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#! /responder/foo/bar - responder foo, argument bar
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dup log-responder trim-/ "responder/" ?string-head [
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serve-explicit-responder
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] [
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serve-default-responder
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] ifte ;
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: no-such-responder ( -- )
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"404 No such responder" httpd-error ;
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: add-responder ( responder -- )
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#! Add a responder object to the list.
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"responder" over hash "httpd-responders" get set-hash ;
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