From: Phlip <phlipcpp@...>
Date: 2002-10-29T14:10:49+09:00
Subject: Snippet: Tiny Featureless Ruby Web Server

Rubies:

This would have taken me less than a wall-clock hour if I didn't have a 
life:

#!/usr/bin/ruby

#  a web server in Ruby

require 'socket'

$mimeTypes = { 'jpg' => 'image/jgp',  'gif' => 'image/gif', 'png' => 
'image/png',
              'html' => 'text/html', 'pdf' => 'application/pdf' }
              
$response = {}  #  TODO make me a map...

$response[200] =\
'''HTTP/1.0 200 Okay
Server: ws30
Content-type: %s

%s
'''

$response[301] =\
"""HTTP/1.0 301 Moved
Server: ws30
Content-type: text/plain
Location: %s

moved%s
"""

$response[404] =\
'''HTTP/1.0 404 Not Found
Server: ws30
Content-type: text/plain

%s not found%s
'''


def serverSocket host, port

#  TODO  make these real arguments...

    s = TCPServer.new('localhost', port)
    return s
end


def listen s
    connection, client = s.accept()
    return connection
end


def getRequest stream 
    method = nil
    
    while 1 do
        line = stream.readline()
        if line.strip().length() == 0 then
            break
        elsif ! method
            method, uri, protocol = line.split()
        end
    end

    return uri
end


def listDirectory uri
    return 'directory none of your business'
end


def getFile path
    f = open( path )
    return f.read()  #  TODO  begin/rescue here
end


def getContent uri
    print 'fetching:', uri
    
    begin
        path = '.' + uri 
        if File.file?( path ) then
            return [ 200, getMime( uri ), getFile( path ) ]
        end
        if File.directory?( path ) then
            if( uri[uri.length() - 1].chr == '/' ) then
                return [ 200, 'text/html', listDirectory( uri ) ]
            else
                return [ 301, uri + '/' ]
            end
        else
            return [ 404, uri ]
        end
        
#      TODO actually stringify the error ;-)

    rescue
        return [ 404, 'some dumb IO error' ]
    end
end

def getMime uri 
    type = $mimeTypes[ uri.split('.')[-1]]
    type = 'text/plain' if type == nil
    return type
end


def sendResponse stream, content
    $responseType = $response[content[0]]
    content.push("")
    response = sprintf($responseType, content[1], content[2] )
    stream.write( response )
end

if __FILE__ == $0 then
    
    server = serverSocket( 'localhost', 8080 )
    
    begin
        while 1 do
            stream = listen ( server )
            sendResponse( stream, getContent( getRequest( stream ) ) )
            stream.close()
        end
    rescue
        print 'shutting down...'
    end
    
    server.close()
end

-- 
  Phlip
           http://flea.sourceforge.net
  --  Got in trouble at StarBucks. I tried to order
        "A double latte mocha and a body piercing."  --