[2013-01-29 09:17:50] INFO WEBrick 1.3.1
[2013-01-29 09:17:50] INFO ruby 1.8.7 (2012-10-12) [i386-linux]
[2013-01-29 09:17:50] WARN TCPServer Error: Address already in use - bind(2)
[2013-01-29 09:17:50] INFO WEBrick::HTTPServer#start: pid=4107 port=8080
When I run the file attached below in linux I get the error described. I tried all possible command and strategies online to listen to processes (including rogue) and kill them. I did this in lots of ports. No luck.
As soon as I run the script in Mac OS and it works. Nevertheless I have to mount it on a server and clients have to communicate with it. It happens on every instance of amazon ec2 and on heroku. I have seen this error one too many times and spend many hours trying to fix it. I configured the security group of ec2 instances and still did not work. I am beyond desperate. At this point I have to think that the problem must be WEBrick itself or something in my code.
require 'webrick'
require 'uri'
require 'net/http'
$own_address = 8080
class AuctionInfo
# The representation is a hash mapping item names to [highest_bidder, highest_bid, end_time]
def initialize
@data = {}
end
def new_item(item, endTime)
@data[item] = ["UNKNOWN", 0, endTime]
end
def bid(item, bid, client)
if @data.has_key?(item)
endTime = @data[item][2]
if @data[item][1].to_i < bid.to_i and Time.new.to_i < endTime.to_i
@data[item] = [client, bid, endTime]
end
end
end
def get_status(item)
if @data.has_key?(item)
return @data[item][0]
end
end
def winner(item)
if @data.has_key?(item)
if @data[item][2].to_i + 1 <= Time.new.to_i
return @data[item][0]
else return "UNKNOWN"
end
end
end
def reset
@data = {}
end
def has_item(item)
return @data.has_key?(item)
end
def get_data
return {}.replace(@data)
end
end
class StartAuctionServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_POST(request, response)
if request.query['name'] and request.query['end_time']
@data.new_item(request.query['name'], request.query['end_time'].to_i)
end
response.status = 200
end
alias_method :do_GET, :do_POST
end
class BidServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_POST(request, response)
if request.query['name'] and request.query['client'] and request.query['bid']
@data.bid(request.query['name'], request.query['bid'].to_i, request.query['client'])
end
response.status = 200
end
alias_method :do_GET, :do_POST
end
class StatusServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_GET(request, response)
if request.query['name']
response.body = @data.get_status(request.query['name'])
end
response.status = 200
end
alias_method :do_POST, :do_GET
end
class WinnerServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_GET(request, response)
if request.query['name']
response.body = @data.winner(request.query['name'])
end
response.status = 200
end
alias_method :do_POST, :do_GET
end
class ResetServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_POST(request, response)
@data.reset
response.status = 200
end
alias_method :do_GET, :do_POST
end
class RandomServlet < WEBrick::HTTPServlet::AbstractServlet
def initialize(server, data)
@data = data
end
def do_GET(request, response)
response.status = 200
response.body = @data.get_data.to_s
end
alias_method :do_POST, :do_GET
end
data = AuctionInfo.new
server = WEBrick::HTTPServer.new(:Port => $own_address)
server.mount '/start_auction', StartAuctionServlet, data
server.mount '/bid', BidServlet, data
server.mount '/status', StatusServlet, data
server.mount '/winner', WinnerServlet, data
server.mount '/rst', ResetServlet, data
server.mount '/', RandomServlet, data
trap("INT") { server.shutdown }
server.start
