Class: Mayfly::Servlet

Inherits:
WEBrick::HTTPServlet::AbstractServlet
  • Object
show all
Defined in:
lib/mayfly/servlet.rb

Constant Summary collapse

@@instance = 
nil
@@instance_creation_mutex = 
Mutex.new

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, file, max, passwd = nil) ⇒ Servlet

Returns a new instance of Servlet.



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# File 'lib/mayfly/servlet.rb', line 20

def initialize(config, file, max, passwd = nil)
  super
  @file = file
  @max = max
  @count = 1
  @count_mutex = Mutex.new
  @passwd = passwd
end

Class Method Details

.get_instance(config, *options) ⇒ Object 



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# File 'lib/mayfly/servlet.rb', line 14

def self.get_instance(config, *options)
  @@instance_creation_mutex.synchronize {
    @@instance = @@instance || self.new(config, *options)
  }
end

Instance Method Details

#do_GET(req, resp) ⇒ Object 



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# File 'lib/mayfly/servlet.rb', line 29

def do_GET(req, resp)

  if (@count > @max)
    resp.status = 401
  end
  
  if (@passwd)
    WEBrick::HTTPAuth.basic_auth(req, resp, 'mayfly') do |user, pass|
        user == 'mayfly' && pass == @passwd
    end
  end
        
  st = File::stat(@file)
  resp['content-type'] = WEBrick::HTTPUtils::mime_type(@file, WEBrick::HTTPUtils::DefaultMimeTypes) 
  resp['content-length'] = st.size
  resp['content-disposition'] = "attachment; filename=\"#{File.basename(@file)}\""
  resp['last-modified'] = st.mtime.httpdate
  resp['Cache-Control'] = 'no-cache, must-revalidate'
  
  close_callback = nil 
  
  @count_mutex.synchronize {
    @count += 1
    close_callback = Proc.new do
      growl("mayfly served #{@file} to #{req.peeraddr[2]}")            
      if (@count > @max)
        @server.shutdown if (@count >= @max) 
        growl("mayfly has died, it served #{@file} #{@max} times")            
      end
    end
  }
  
  if (@count <= @max + 1)
    resp.body = File.new(@file, close_callback)
  end
  
end