I need read info from a file, extract the info that I want which is the date and IP and dump them into a database (mysql).
However, this file gets constantly updated, sits on /var/log/.
Until now I have used just the file.open and file.read methods. However, I feel that both ways are not suitable for what I want to do, because I will need to make a selection between old and new entries every time my script reads the file to extract info.
What is the *standard* (or best) way to manage this situation?
Here is the class which reads the file:
class ReadIPs
def self.ip(log)
file = File.open(log)
file.each_line do |line|
if line.include?("Ban")
a = line.split(" ")
date = a[0]
ip = a[6]
puts "date: #{date} IP: #{ip}"
end
end
file.close
end
end
I use File.open now but I should use something like File.append or similar? Note that I will never write to this file, it's just the file that contains the info. Every time a new line appears that contains the word "Ban" I want to trigger this...
I need read info from a file, extract the info that I want which is the date and IP and dump them into a database (mysql).
However, this file gets constantly updated, sits on /var/log/.
Until now I have used just the file.open and file.read methods. However, I feel that both ways are not suitable for what I want to do, because I will need to make a selection between old and new entries every time my script reads the file to extract info.
What is the *standard* (or best) way to manage this situation?
Here is the class which reads the file:
class ReadIPs
def self.ip(log)
file = File.open(log)
Ha! There you are not using block form of File.open and you do not have the #close in ensure!
file.each_line do |line|
if line.include?("Ban")
a = line.split(" ")
date = a[0]
ip = a[6]
puts "date: #{date} IP: #{ip}"
end
end
file.close
end
end
I use File.open now but I should use something like File.append or similar? Note that I will never write to this file, it's just the file that contains the info. Every time a new line appears that contains the word "Ban" I want to trigger this...
Best regards
I can't test it right now but this might be an option.
File.open log do |io|
loop do
io.each do |line|
# whatever...
end
# v2: pos = io.tell
sleep 10 # whatever interval is appropriate
# v1: io.seek(0, IO::SEEK_SET)
# v2: io.seek(pos, IO::SEEK_CUR)
end
end
Maybe you have to do one of the variants to clear eof flag:
v1: seek to offset 0 of current position
v2: fetch the position before the sleep and then seek to that absolute position
I need read info from a file, extract the info that I want which is the date and IP and dump them into a database (mysql).
However, this file gets constantly updated, sits on /var/log/.
Until now I have used just the file.open and file.read methods. However, I feel that both ways are not suitable for what I want to do, because I will need to make a selection between old and new entries every time my script reads the file to extract info.
What is the *standard* (or best) way to manage this situation?
Here is the class which reads the file:
class ReadIPs
def self.ip(log)
file = File.open(log)
Ha! There you are not using block form of File.open and you do not have the #close in ensure!
I don't understand what do you mean by 'ensure'.
file.each_line do |line|
if line.include?("Ban")
a = line.split(" ")
date = a[0]
ip = a[6]
puts "date: #{date} IP: #{ip}"
end
end
file.close
end
end
I use File.open now but I should use something like File.append or similar? Note that I will never write to this file, it's just the file that contains the info. Every time a new line appears that contains the word "Ban" I want to trigger this...
Best regards
I can't test it right now but this might be an option.
File.open log do |io|
loop do
io.each do |line|
# whatever...
end
# v2: pos = io.tell
sleep 10 # whatever interval is appropriate
# v1: io.seek(0, IO::SEEK_SET)
# v2: io.seek(pos, IO::SEEK_CUR)
end
end
Maybe you have to do one of the variants to clear eof flag:
v1: seek to offset 0 of current position
v2: fetch the position before the sleep and then seek to that absolute position
Kind regards
robert
Oh, this solutions, might work but I think that it's a bit overcomplicated for me. I did not used IO and "seek" yet...
I found online [1] a few examples but I did not had the time to test them.
email: atma@convalesco.org
URL: http://www.convalesco.org
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- --
The wise man said: "Never argue with an idiot. They bring you down to their level and beat you with experience."
···
On 13 Δεκ 2009, at 1:20 μ.μ., Robert Klemme wrote:
I need read info from a file, extract the info that I want which is the date and IP and dump them into a database (mysql).
However, this file gets constantly updated, sits on /var/log/.
Until now I have used just the file.open and file.read methods. However, I feel that both ways are not suitable for what I want to do, because I will need to make a selection between old and new entries every time my script reads the file to extract info.
What is the *standard* (or best) way to manage this situation?
Here is the class which reads the file:
class ReadIPs
def self.ip(log)
file = File.open(log)
Ha! There you are not using block form of File.open and you do not have the #close in ensure!
I don't understand what do you mean by 'ensure'.
There full syntax you can have with begin end blocks is
file.each_line do |line|
if line.include?("Ban")
a = line.split(" ")
date = a[0]
ip = a[6]
puts "date: #{date} IP: #{ip}"
end
end
file.close
end
end
I use File.open now but I should use something like File.append or similar? Note that I will never write to this file, it's just the file that contains the info. Every time a new line appears that contains the word "Ban" I want to trigger this...
Best regards
I can't test it right now but this might be an option.
File.open log do |io|
loop do
io.each do |line|
# whatever...
end
# v2: pos = io.tell
sleep 10 # whatever interval is appropriate
# v1: io.seek(0, IO::SEEK_SET)
# v2: io.seek(pos, IO::SEEK_CUR)
end
end
Maybe you have to do one of the variants to clear eof flag:
v1: seek to offset 0 of current position
v2: fetch the position before the sleep and then seek to that absolute position
Oh, this solutions, might work but I think that it's a bit overcomplicated for me. I did not used IO and "seek" yet...
#seek is not used in the simplest case. What about reading up on #seek and #tell or trying out the code? I don't see where this is complicated. If that's too complicated for you then I either my explanation made it look more complicated that it actually is or you should abandon software development. You'll encounter far more complicated things in the course of it.
I found online [1] a few examples but I did not had the time to test them.
I am not sure whether pleac is a proper source to enter the world of ruby. AFAIK their aim is to compare languages - not to present an introductory read of particular languages. There are quite a few tutorials and books out there for Ruby.
I need read info from a file, extract the info that I want which is the date and IP and dump them into a database (mysql).
However, this file gets constantly updated, sits on /var/log/.
Until now I have used just the file.open and file.read methods. However, I feel that both ways are not suitable for what I want to do, because I will need to make a selection between old and new entries every time my script reads the file to extract info.
What is the *standard* (or best) way to manage this situation?
Here is the class which reads the file:
class ReadIPs
def self.ip(log)
file = File.open(log)
Ha! There you are not using block form of File.open and you do not have the #close in ensure!
I don't understand what do you mean by 'ensure'.
There full syntax you can have with begin end blocks is
file.each_line do |line|
if line.include?("Ban")
a = line.split(" ")
date = a[0]
ip = a[6]
puts "date: #{date} IP: #{ip}"
end
end
file.close
end
end
I use File.open now but I should use something like File.append or similar? Note that I will never write to this file, it's just the file that contains the info. Every time a new line appears that contains the word "Ban" I want to trigger this...
Best regards
I can't test it right now but this might be an option.
File.open log do |io|
loop do
io.each do |line|
# whatever...
end
# v2: pos = io.tell
sleep 10 # whatever interval is appropriate
# v1: io.seek(0, IO::SEEK_SET)
# v2: io.seek(pos, IO::SEEK_CUR)
end
end
Maybe you have to do one of the variants to clear eof flag:
v1: seek to offset 0 of current position
v2: fetch the position before the sleep and then seek to that absolute position
Oh, this solutions, might work but I think that it's a bit overcomplicated for me. I did not used IO and "seek" yet...
#seek is not used in the simplest case. What about reading up on #seek and #tell or trying out the code? I don't see where this is complicated. If that's too complicated for you then I either my explanation made it look more complicated that it actually is or you should abandon software development. You'll encounter far more complicated things in the course of it.
Given the fact that I'm messing with Ruby less than 8 days, I'll pass that note.
By complicated I meant that, ruby might have a build-in function or gem that already deals with this situation of monitoring etc.
I found online [1] a few examples but I did not had the time to test them.
Maybe something like: file = File.open(path, File::WRONLY|File::APPEND)
Will do.
I am not sure whether pleac is a proper source to enter the world of ruby. AFAIK their aim is to compare languages - not to present an introductory read of particular languages. There are quite a few tutorials and books out there for Ruby.
email: atma@convalesco.org
URL: http://www.convalesco.org
GnuPG ID: 0xFC4E8BB4
gpg --keyserver x-hkp://pgp.mit.edu --recv-keys 0xFC4E8BB4
- --
The wise man said: "Never argue with an idiot. They bring you down to their level and beat you with experience."
···
On 13 Δεκ 2009, at 4:35 μ.μ., Robert Klemme wrote:
