Newbie needs help! Strange error in code

ruby-talk
1

Hi, I am very new to Ruby and yesterday I managed to get a simple server
operating which told me the time. I tried to extend this by adding in a
simple myvar = gets.chomp! and a print myvar in place of the date
output. This is the whole code:

test = gets.chomp!
puts test
require 'socket'
port = (ARGV[0] || 80).to_i
server = TCPServer.new('localhost', port)
while (session = server.accept)
  puts "Request: #{session.gets}"
  session.print "HTTP/1.1 200/OK\r\nContent-type: text/html\r\n\r\n"
  session.print "<html><body><h1>#{test}</h1></body></html>\r\n"
  session.close
end

The problem is that I get and error when I run it which says "`gets': No
such file or directory - 1400 (Errno::ENOENT)"

I run the program with "ruby x.rb 1400" 1400 is the port number

If anyone can help me, I will be eternally thankfully.

···

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2

'gets' isn't doing what you think it is:

------------------------------------------------------------ Kernel#gets
      gets(separator=$/) => string or nil

···

On 25 Jun 2007, at 16:31, Tom Savage wrote:

Hi, I am very new to Ruby and yesterday I managed to get a simple server
operating which told me the time. I tried to extend this by adding in a
simple myvar = gets.chomp! and a print myvar in place of the date
output. This is the whole code:

test = gets.chomp!
puts test
require 'socket'
port = (ARGV[0] || 80).to_i
server = TCPServer.new('localhost', port)
while (session = server.accept)
  puts "Request: #{session.gets}"
  session.print "HTTP/1.1 200/OK\r\nContent-type: text/html\r\n\r\n"
  session.print "<html><body><h1>#{test}</h1></body></html>\r\n"
  session.close
end

The problem is that I get and error when I run it which says "`gets': No
such file or directory - 1400 (Errno::ENOENT)"

I run the program with "ruby x.rb 1400" 1400 is the port number

If anyone can help me, I will be eternally thankfully.

--
Posted via http://www.ruby-forum.com/\.

------------------------------------------------------------------------
      Returns (and assigns to +$_+) the next line from the list of files
      in +ARGV+ (or +$*+), or from standard input if no files are present
      on the command line. Returns +nil+ at end of file. The optional
      argument specifies the record separator. The separator is included
      with the contents of each record. A separator of +nil+ reads the
      entire contents, and a zero-length separator reads the input one
      paragraph at a time, where paragraphs are divided by two
      consecutive newlines. If multiple filenames are present in +ARGV+,
      +gets(nil)+ will read the contents one file at a time.

         ARGV << "testfile"
         print while gets

      _produces:_

         This is line one
         This is line two
         This is line three
         And so on...

By calling your script as 'ruby x.rb 1400' gets attempts to read the first line of a file called '1400', which doesn't exist. If you run the program as 'ruby x.rb' and then type 1400 when it pauses you will get the behavior (I think) you expect. Alternatively replace gets.chomp! with ARGV[0].chomp.

Alex Gutteridge

Bioinformatics Center
Kyoto University

3

Thanks very much! It solved my problem.

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