75 lines
2.5 KiB
Factor
75 lines
2.5 KiB
Factor
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! Copyright (C) 2005, 2007 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: assocs http kernel math math.parser namespaces sequences
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io io.sockets io.streams.string io.files strings splitting
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continuations ;
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IN: http.client
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: parse-host ( url -- host port )
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#! Extract the host name and port number from an HTTP URL.
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":" split1 [ string>number ] [ 80 ] if* ;
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: parse-url ( url -- host resource )
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"http://" ?head [
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"URL must begin with http://" throw
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] unless
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"/" split1 [ "/" swap append ] [ "/" ] if* ;
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: parse-response ( line -- code )
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"HTTP/" ?head [ " " split1 nip ] when
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" " split1 drop string>number [
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"Premature end of stream" throw
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] unless* ;
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: read-response ( -- code header )
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#! After sending a GET or POST we read a response line and
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#! header.
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flush readln parse-response read-header ;
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: crlf "\r\n" write ;
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: http-request ( host resource method -- )
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write " " write write " HTTP/1.0" write crlf
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"Host: " write write crlf ;
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: get-request ( host resource -- )
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"GET" http-request crlf ;
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DEFER: http-get-stream
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: do-redirect ( code headers stream -- code headers stream )
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#! Should this support Location: headers that are
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#! relative URLs?
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pick 100 /i 3 = [
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stream-close "Location" swap at nip http-get-stream
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] when ;
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: http-get-stream ( url -- code headers stream )
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#! Opens a stream for reading from an HTTP URL.
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parse-url over parse-host <inet> <client> [
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[ [ get-request read-response ] with-stream* ] keep
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] [ >r stream-close r> rethrow ] recover do-redirect ;
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: http-get ( url -- code headers string )
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#! Opens a stream for reading from an HTTP URL.
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http-get-stream [ stdio get contents ] with-stream ;
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: download ( url file -- )
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#! Downloads the contents of a URL to a file.
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>r http-get 2nip r> <file-writer> [ write ] with-stream ;
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: post-request ( content-type content host resource -- )
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#! Note: It is up to the caller to url encode the content if
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#! it is required according to the content-type.
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"POST" http-request [
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"Content-Length: " write length number>string write crlf
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"Content-Type: " write url-encode write crlf
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crlf
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] keep write ;
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: http-post ( content-type content url -- code headers string )
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#! Make a POST request. The content is URL encoded for you.
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parse-url over parse-host <inet> <client> [
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post-request flush read-response stdio get contents
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] with-stream ;
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