["test string\n", nil] i need to strip \n and nil

ruby-talk
1

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the file,
"59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with the
string...

···

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

2

["59023\n", nil].join.to_i

···

On Sun, Sep 6, 2009 at 10:27 PM, Bigmac Turdsplash<i8igmac@aim.com> wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the file,
"59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with the
string...

--
^ manveru

3

["59023\n", nil].compact.collect{|x| x.chomp}

···

On Mon, 07 Sep 2009 05:27:10 +0900, Bigmac Turdsplash wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the file,
"59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with the
string...

--
Chanoch (Ken) Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/

4

Michael Fellinger wrote:

["59023\n", nil].join.to_i

You're kidding, right?

···

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

5

Ken Bloom wrote:

···

On Mon, 07 Sep 2009 05:27:10 +0900, Bigmac Turdsplash wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the file,
"59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with the
string...

["59023\n", nil].compact.collect{|x| x.chomp}

Didn't you really mean:

["59023\n", nil].inject("") {|acc, elmt|
"#{acc}#{elmt}"}.match(/\n/).pre_match

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

6

Hi,

Michael Fellinger wrote:
>
> ["59023\n", nil].join.to_i

You're kidding, right?

I don't beleive it either but it's time to say:

  ary.compact.map { |l| l.chomp }.join

This is expert level (and maybe even not portable):

  ary.compact!
  ary.each { |l| l.chomp! }
  result = ary.join

I'm quite sure that the result is always in the first array
element.

  res = ary.first
  res.chomp!

Everything untested.

Bertram

···

Am Montag, 07. Sep 2009, 08:41:45 +0900 schrieb 7stud --:

--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de

7

7stud -- wrote:

Michael Fellinger wrote:

["59023\n", nil].join.to_i

You're kidding, right?

I had it figured out a few minutes after this post... i didnt know the
differnce between a string and array... i convert the array to a string
then used compact

i thought i was working the string class so i was reading threw the
wrong page...

any ways... because of this premature post, i spent a few hours try to
solve a new problem before i ask for help...

strings="a9digh0t5"
# every 3 bytes i need broke into separate strings
puts(string[1]) #==> a9d
puts(string[2]) #==> ihg
puts(string[3]) #==> 0t5

how can i brake a long string into blocks equal to 3 bytes?

···

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

8

Hi --

···

On Tue, 8 Sep 2009, 7stud -- wrote:

Ken Bloom wrote:

On Mon, 07 Sep 2009 05:27:10 +0900, Bigmac Turdsplash wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the file,
"59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with the
string...

["59023\n", nil].compact.collect{|x| x.chomp}

Didn't you really mean:

["59023\n", nil].inject("") {|acc, elmt|
"#{acc}#{elmt}"}.match(/\n/).pre_match

I don't think so. That seems a bit roundabout.

David

--
David A. Black / Ruby Power and Light, LLC / http://www.rubypal.com
Ruby/Rails training, mentoring, consulting, code-review
Latest book: The Well-Grounded Rubyist (http://www.manning.com/black2\)

September Ruby training in NJ has been POSTPONED. Details to follow.

9

No, that's not quite the same at all. (I did exactly what he asked for in
the subject line.)

···

On Tue, 08 Sep 2009 03:50:24 +0900, 7stud -- wrote:

Ken Bloom wrote:

On Mon, 07 Sep 2009 05:27:10 +0900, Bigmac Turdsplash wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the
file, "59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with
the string...

["59023\n", nil].compact.collect{|x| x.chomp}

Didn't you really mean:

["59023\n", nil].inject("") {|acc, elmt|
"#{acc}#{elmt}"}.match(/\n/).pre_match

--
Chanoch (Ken) Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/

10

Hi,

···

Am Montag, 07. Sep 2009, 11:33:13 +0900 schrieb Bertram Scharpf:

I'm quite sure that the result is always in the first array
element.

  res = ary.first
  res.chomp!

I just looked it up and found thhat you probably use TCPSocket#recvfrom.

  data, status = socket.recvfrom ...
  data.chomp!

Bertram

--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de

11

#server.rb
require 'socket' # Get sockets from stdlib
server = TCPServer.open(2000) # Socket to listen on port 2000
loop { # Servers run forever
  Thread.start(server.accept) do |client|
  file = File.new('/pentest/windows-binaries/tools/test.exe')
  fileContent = file.read # reads the file
  client.puts(fileContent)
  client.close
end

}

#client
require 'socket'

host = '192.168.1.4'
port = 2000
sock = TCPSocket.open(host, port)

  data = sock.recvfrom(999999)
  destFile = File.open('/tmp/poop.exe', 'wb')
  destFile.print data
  destFile.close

Ok, just to show you what im working with... it works, but there is a
file size limit when working with recvfrom()

im trying to work out a function to check file size then brake the data
into blocks...

···

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

12

Bigmac Turdsplash wrote:

7stud -- wrote:

Michael Fellinger wrote:

["59023\n", nil].join.to_i

You're kidding, right?

I had it figured out a few minutes after this post... i didnt know the
differnce between a string and array... i convert the array to a string
then used compact

Ridiculous. You would never compact an array just to get the first
element. If you want the first element, then grab it. See Bertram's
posts.

i thought i was working the string class so i was reading threw the
wrong page...

any ways... because of this premature post, i spent a few hours try to
solve a new problem before i ask for help...

strings="a9digh0t5"
# every 3 bytes i need broke into separate strings
puts(string[1]) #==> a9d
puts(string[2]) #==> ihg
puts(string[3]) #==> 0t5

how can i brake a long string into blocks equal to 3 bytes?

If the length of the string will always be a multiple of 3, you can do
this:

str = "a9digh0t5"

str.scan(/.{3}/) do |substr|
  puts substr
end

--output:--
a9d
igh
0t5

Otherwise, you'll have to deal with ruby's infernal each_byte() method.

···

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13

I think 7stud is being sarcastic... He thinks the compact is
unnecessary, and is explaining his point by introducing other
unnecessary elements like inject.

···

On Tue, Sep 8, 2009 at 1:08 AM, Ken Bloom<kbloom@gmail.com> wrote:

On Tue, 08 Sep 2009 03:50:24 +0900, 7stud -- wrote:

Ken Bloom wrote:

On Mon, 07 Sep 2009 05:27:10 +0900, Bigmac Turdsplash wrote:

im sending files back and forth form a client and a server using
sockets,

the first string the server sends to the client is the size of the
file, "59023"

the client recives this string in this format "59023\n", nil

i need to trim \n and nil from the string so i can do some math with
the string...

["59023\n", nil].compact.collect{|x| x.chomp}

Didn't you really mean:

["59023\n", nil].inject("") {|acc, elmt|
"#{acc}#{elmt}"}.match(/\n/).pre_match

No, that's not quite the same at all. (I did exactly what he asked for in
the subject line.)

--
Chanoch (Ken) Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/

--
Paul Smith
http://www.nomadicfun.co.uk

paul@pollyandpaul.co.uk

14

Bigmac Turdsplash wrote:

require 'socket'

host = '192.168.1.4'
port = 2000
sock = TCPSocket.open(host, port)

  data = sock.recvfrom(999999)
  destFile = File.open('/tmp/poop.exe', 'wb')
  destFile.print data
  destFile.close

Ok, just to show you what im working with... it works, but there is a
file size limit when working with recvfrom()

Skipping the basics of a language never works, does it?

···

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

15

7stud -- wrote:

Bigmac Turdsplash wrote:

7stud -- wrote:

Michael Fellinger wrote:

["59023\n", nil].join.to_i

You're kidding, right?

I had it figured out a few minutes after this post... i didnt know the
differnce between a string and array... i convert the array to a string
then used compact

Ridiculous. You would never compact an array just to get the first
element. If you want the first element, then grab it. See Bertram's
posts.

i thought i was working the string class so i was reading threw the
wrong page...

any ways... because of this premature post, i spent a few hours try to
solve a new problem before i ask for help...

strings="a9digh0t5"
# every 3 bytes i need broke into separate strings
puts(string[1]) #==> a9d
puts(string[2]) #==> ihg
puts(string[3]) #==> 0t5

how can i brake a long string into blocks equal to 3 bytes?

If the length of the string will always be a multiple of 3, you can do
this:

str = "a9digh0t5"

str.scan(/.{3}/) do |substr|
  puts substr
end

--output:--
a9d
igh
0t5

Otherwise, you'll have to deal with ruby's infernal each_byte() method.

Actually, you can take advantage of a regex's greedy nature, and do this
instead:

str = "a9digh0t5xx"

str.scan(/.{1,3}/) do |substr|
  puts substr
end

--output:--
a9d
igh
0t5
xx

···

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

16

7stud -- wrote:

Bigmac Turdsplash wrote:

require 'socket'

host = '192.168.1.4'
port = 2000
sock = TCPSocket.open(host, port)

  data = sock.recvfrom(999999)
  destFile = File.open('/tmp/poop.exe', 'wb')
  destFile.print data
  destFile.close

Ok, just to show you what im working with... it works, but there is a
file size limit when working with recvfrom()

Skipping the basics of a language never works, does it?

lol, oops... data = sock.read

how can i send a hole directory?
#server
directory = File.new('/pentest/windows-binaries/tools/')
#client
folder.open('/tmp/directory/', 'wb')

···

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