Class: Jscall::FetchServer

Inherits:
Object
  • Object
show all
Defined in:
lib/jscall/browser.rb

Constant Summary collapse

@@webpage = 
'/jscall/jscall.html'
@@run_cmd = 
case RbConfig::CONFIG['host_os']
when /linux/
    'xdg-open'
when /darwin|mac os/
    'open'
else
    'start'
end

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port, urls) ⇒ FetchServer

Returns a new instance of FetchServer.



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# File 'lib/jscall/browser.rb', line 76

def initialize(port, urls)
    @url_map = urls
    @send_buffer = Thread::Queue.new
    @receive_buffer = Thread::Queue.new
    @server_running = false

    @server = WEBrick::HTTPServer.new(
        # :DoNotReverseLookup => true,
        :DocumentRoot => './',
        :BindAddress => '0.0.0.0',
        :Port => port,
        :ServerType => Thread,
        :Logger => WEBrick::Log.new(nil, WEBrick::Log::ERROR),
        :AccessLog => []
    )

    @server.mount_proc('/') do |req, res|
        peer_address  = req.peeraddr[3]
        if peer_address != '127.0.0.1'
            $stderr.puts "access denied address=#{peer_address}"
            raise WEBrick::HTTPStatus::Forbidden
        end

        if req.path.start_with?('/cmd/')
            read_stream(req, res)
        else
            read_file(req, res)
        end
    end
end

Class Method Details

.open_command=(name) ⇒ Object 



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# File 'lib/jscall/browser.rb', line 72

def self.open_command=(name)
    @@run_cmd = name
end

Instance Method Details

#autoclose=(value) ⇒ Object 



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# File 'lib/jscall/browser.rb', line 157

def autoclose=(value)
    false
end

#close ⇒ Object 



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# File 'lib/jscall/browser.rb', line 148

def close
    puts('done')
    @server_running = false
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jscall/browser.rb', line 153

def closed?
    !@server_running
end

#gets ⇒ Object 



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# File 'lib/jscall/browser.rb', line 171

def gets
    @receive_buffer.pop
end

#open ⇒ Object 



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# File 'lib/jscall/browser.rb', line 129

def open
    if @server_running
        close
    else
        @server_running = true
        if @server.status != :Running
            Signal.trap(:INT){ @server.shutdown }
            @server.start
            Thread.pass
        end
    end
    raise "A web page was reloaded" unless @receive_buffer.empty?
    status = system "#{@@run_cmd} http://localhost:#{@server[:Port]}#{@@webpage}"
    raise "cannot launch a web browser by '#{@@run_cmd}'" if status.nil?
    unless @receive_buffer.pop == 'start'
        raise 'failed to initialize JavaScript'
    end
end

#puts(msg) ⇒ Object 



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# File 'lib/jscall/browser.rb', line 166

def puts(msg)
    @send_buffer.push(msg)
    Thread.pass
end

#read_file(req, res) ⇒ Object 



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# File 'lib/jscall/browser.rb', line 114

def read_file(req, res)
    path = req.path
    if path.start_with?('/jscall/')
        root = "#{__dir__}/../"
    else
        value = @url_map[path]
        if value.nil?
            root = @server.config[:DocumentRoot]
        else
            root = value[1]
        end
    end
    WEBrick::HTTPServlet::FileHandler.new(@server, root).service(req, res)
end

#read_stream(req, res) ⇒ Object 



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# File 'lib/jscall/browser.rb', line 107

def read_stream(req, res)
    body = req.body
    @receive_buffer.push(if body.nil? then '' else body end)
    res.content_type = "text/plain"
    res.body = @send_buffer.pop
end

#shutdown ⇒ Object 



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# File 'lib/jscall/browser.rb', line 161

def shutdown
    close
    @server.stop
end