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  • What grammar based parser-generator tools exist for ruby?

    - by cartoonfox
    What open source (preferably gem-based) parser-generator options do I have in Ruby? I've used (flex&bison)|(lex&yacc) from C in the past, and I'm comfortable with BNF-style specifications. I've heard of treetop, but it looks a bit alien and verbose compared to yacc... Purpose: I want to convert my text markup language to a BNF and generate the parsing code. I think it's a better strategy than my first-order solution: http://github.com/dafydd/semantictext/blob/master/lib/semantictext/rich_text_parser.rb

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  • Code golf - hex to (raw) binary conversion

    - by Alnitak
    In response to this question asking about hex to (raw) binary conversion, a comment suggested that it could be solved in "5-10 lines of C, or any other language." I'm sure that for (some) scripting languages that could be achieved, and would like to see how. Can we prove that comment true, for C, too? NB: this doesn't mean hex to ASCII binary - specifically the output should be a raw octet stream corresponding to the input ASCII hex. Also, the input parser should skip/ignore white space. edit (by Brian Campbell) May I propose the following rules, for consistency? Feel free to edit or delete these if you don't think these are helpful, but I think that since there has been some discussion of how certain cases should work, some clarification would be helpful. The program must read from stdin and write to stdout (we could also allow reading from and writing to files passed in on the command line, but I can't imagine that would be shorter in any language than stdin and stdout) The program must use only packages included with your base, standard language distribution. In the case of C/C++, this means their respective standard libraries, and not POSIX. The program must compile or run without any special options passed to the compiler or interpreter (so, 'gcc myprog.c' or 'python myprog.py' or 'ruby myprog.rb' are OK, while 'ruby -rscanf myprog.rb' is not allowed; requiring/importing modules counts against your character count). The program should read integer bytes represented by pairs of adjacent hexadecimal digits (upper, lower, or mixed case), optionally separated by whitespace, and write the corresponding bytes to output. Each pair of hexadecimal digits is written with most significant nibble first. The behavior of the program on invalid input (characters besides [a-fA-F \t\r\n], spaces separating the two characters in an individual byte, an odd number of hex digits in the input) is undefined; any behavior (other than actively damaging the user's computer or something) on bad input is acceptable (throwing an error, stopping output, ignoring bad characters, treating a single character as the value of one byte, are all OK) The program may write no additional bytes to output. Code is scored by fewest total bytes in the source file. (Or, if we wanted to be more true to the original challenge, the score would be based on lowest number of lines of code; I would impose an 80 character limit per line in that case, since otherwise you'd get a bunch of ties for 1 line).

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  • Creating a structure from bytes with ctypes and IronPython

    - by Adal
    I have the following CPython code which I now try to run in IronPython: import ctypes class BarHeader(ctypes.Structure): _fields_ = [ ("id", ctypes.c_char * 4), ("version", ctypes.c_uint32)] bar_file = open("data.bar", "rb") header_raw = bar_file.read(ctypes.sizeof(BarHeader)) header = BarHeader.from_buffer_copy(header_raw) The last line raises this exception: TypeError: expected array, got str I tried BarHeader.from_buffer_copy(bytes(header_raw)) instead of the above, but then the exception message changes to TypeError: expected array, got bytes. Any idea what I'm doing wrong?

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  • and or operator in validates_presence_of of a Ruby on Rails model

    - by user284194
    I have an entry.rb model and I'm trying to make a semi-complicated validation. I want it to require one or more of the following fields: phone, phone2, mobile, fax, email or website. How would you write the intended code? Would something like this work? validates_presence_of :phone and or :phone2 and or :mobile and or :fax and or :email and or :website

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  • File upload with Sinatra.

    - by Ethan Turkeltaub
    I am trying to be able to upload files with Sinatra. I have the code here, but I'm getting the error "method file_hash does not exist" (see /lib/mvc/helpers/helpers.rb). What is going on here? Is there some dependency I'm missing.

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  • Rails 2.3.2: Accessing Model Specific Data in Another Model

    - by Gimli
    I'm using Rails 2.3.2 and using Paperclip to upload photos. I'm also using a slightly customized subdomain_accounts.rb to set some account-specific variables. My question is this: How can I set the bucket used in Paperclip to be dependent on the current account? Since this looks to be a model attribute set up early on, how can I override it later? Thanks.

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  • Interaction between C++ and Rails applications

    - by FancyDancy
    I have two applications: c++ service and a RoR web server (they are both running at same VPS) I need to "send" some variables (and then do something with them) from each other. For exaple, i'm looking for something like this: // my C++ sample void SendMessage(string message) { SendTo("127.0.0.1", message); } void GetMessage(string message) { if (message == "stop") SendMessage("success"); } # Ruby sample # application_controller.rb def stop @m = Messager.new @m.send("stop") end I have never used it before, and i even don't know which technology should i search and learn.

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  • Using Mercurial (hg), how to push just one file or one directory out?

    - by Jian Lin
    Using Mercurial, we can commit one file by using hg commit file.rb or 1 folder hg commit foldername But how can we push just 1 file or 1 folder out? The whole project can be pushed using hg push ssh://[email protected]//project/code/preliminary but there seems to be no way to push out just 1 file or 1 folder? I tried the following and they don't work: hg push ssh://[email protected]//project/code/preliminary app/views/index.html.erb or hg push ssh://[email protected]//project/code/preliminary/app/views/index.html.erb

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  • Python: HTTP Post a large file with streaming

    - by Daniel Von Fange
    I'm uploading potentially large files to a web server. Currently I'm doing this: import urllib2 f = open('somelargefile.zip','rb') request = urllib2.Request(url,f.read()) request.add_header("Content-Type", "application/zip") response = urllib2.urlopen(request) However, this reads the entire file's contents into memory before posting it. How can I have it stream the file to the server?

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  • Staring Shotgun with Thin as server using SSL

    - by Bryan Paronto
    I have a Facebook app I'm developing locally. I've configure everything correctly to SSL development with Thin. I know that using a shotgun.rb file, I can pass options to Thin to get it to start in SSL mode, but I'm not exact sure how to pass these options. I'm thinking something like: Thin:Server::options[:ssl] = true Thin:Server::options[:ssl_cert_path] = /path/to/cert/ Restarting thin constantly is getting old, so I'd really like to be able to use shotgun in development.

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  • Rails 3 - development errors in production mode

    - by skrafi
    Im using Rails, Passenger (both are 3.0.5) and Nginx on my production server. As I heard, Rails should show public/404.html or public/500.html instead of development errors like ActiveRecord::RecordNotFound or Unknown action but that doesn't happen. I've tried to delete config.ru file and set rack_env or rails_env in nginx.conf but nothing helped. Here is my nginx.conf: worker_processes 1; events { worker_connections 1024; } http { passenger_root /home/makk/.rvm/gems/ruby-1.9.2-p0/gems/passenger-3.0.5; passenger_ruby /home/makk/.rvm/bin/passenger_ruby; #passenger_ruby /home/makk/.rvm/wrappers/ruby-1.9.2-p0/ruby; include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; server_name localhost; location / { root /home/makk/projects/1server/deploy/current/public; index index.html index.htm; passenger_enabled on; rack_env production; recursive_error_pages on; if (-f /home/makk/projects/1server/maintenance.html) { return 503; } error_page 404 /404.html; error_page 500 502 504 /500.html; error_page 503 @503; } location @503 { error_page 405 = /maintenance.html; # Serve static assets if found. if (-f $request_filename) { break; } rewrite ^(.*)$ /maintenance.html break; } location ~ ^(\/phpmyadmin\/)(.*)$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_split_path_info ^(\/phpmyadmin\/)(.*)$; fastcgi_param SCRIPT_FILENAME /usr/share/phpmyadmin/$fastcgi_path_info; include fastcgi_params; } } } It seems that this question duplicates this one but there are no working suggestions. UPD: I have both development and production apps on same PC. In production Rails ignores config.consider_all_requests_local = false (in /config/environments/production.rb) due to local_request? method. So one of possible solutions is listed below (taken from here): # config/initializers/local_request_override.rb module CustomRescue def local_request? return false if Rails.env.production? || Rails.env.staging? super end end ActionController::Base.class_eval do include CustomRescue end Or for Rails 3: class ActionDispatch::Request def local? false end end

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  • SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed

    - by Vikash
    I am using Authlogic-Connect for third party logins. After running appropriate migrations, Twitter/Google/yahoo logins seem to work fine but the facebook login throws exception: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed The dev log shows OpenSSL::SSL::SSLError (SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed): app/controllers/users_controller.rb:37:in `update' Please suggest..

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  • jQuery is not defined on my staging server but works fine on my local

    - by Tony
    If you pop open this page with your javascript console, you'll notice a bunch of JS errors. I don't get these errors in my local environment and it seems like it is happening because $ is not defined. I have tried to mimic my local environment exactly on staging by using the same environment.rb file and removing all JS caching but it is making no difference. Can anyone tell why jQuery is crapping out? It might be something really stupid, but I need a second pair of eyes.

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  • How do I check SQLite3 syntax?

    - by Benjamin Oakes
    Is there a way to check the syntax of a SQLite3 script without running it? Basically, I'm looking for the SQLite3 equivalent of ruby -c script.rb, perl -c script.pl, php --syntax-check script.php, etc. I've thought of using explain, but most of the scripts I'd like to check are kept around for reference purposes (and don't necessarily have an associated database). Using explain would also make it hard to use with something like Syntastic. (That is, I'm only wanting to check syntax, not semantics.)

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  • Passing arguments to an Rspec SpecTask

    - by Bayard Randel
    Rake allows for the following syntax: task :my_task, :arg1, :arg2 do |t, args| puts "Args were: #{args}" end I'd like to be able to do the same, but with RSpecs SpecTask. The following unfortunately fails: desc "Run example with argument" SpecTask.new('my_task'), :datafile do |t, args| t.spec_files = FileList['cvd*_spec.rb -datafile=#{args}'] t.spec_opts = ["-c -f specdoc"] end Is it possible to achieve this with a SpecTask, or is there an alternative approach?

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  • Need help converting Ruby code to php code

    - by newprog
    Yesterday I posted this queston. Today I found the code which I need but written in Ruby. Some parts of code I have understood (I don't know Ruby) but there is one part that I can't. I think people who know ruby and php can help me understand this code. def do_create(image) # Clear any old info in case of a re-submit FIELDS_TO_CLEAR.each { |field| image.send(field+'=', nil) } image.save # Compose request vm_params = Hash.new # Submitting a file in ruby requires opening it and then reading the contents into the post body file = File.open(image.filename_in, "rb") # Populate the parameters and compute the signature # Normally you would do this in a subroutine - for maximum clarity all # parameters are explicitly spelled out here. vm_params["image"] = file # Contents will be read by the multipart object created below vm_params["image_checksum"] = image.image_checksum vm_params["start_job"] = 'vectorize' vm_params["image_type"] = image.image_type if image.image_type != 'none' vm_params["image_complexity"] = image.image_complexity if image.image_complexity != 'none' vm_params["image_num_colors"] = image.image_num_colors if image.image_num_colors != '' vm_params["image_colors"] = image.image_colors if image.image_colors != '' vm_params["expire_at"] = image.expire_at if image.expire_at != '' vm_params["licensee_id"] = DEVELOPER_ID #in php it's like this $vm_params["sequence_number"] = -rand(100000000);????? vm_params["sequence_number"] = Kernel.rand(1000000000) # Use a negative value to force an error when calling the test server vm_params["timestamp"] = Time.new.utc.httpdate string_to_sign = CREATE_URL + # Start out with the URL being called... #vm_params["image"].to_s + # ... don't include the file per se - use the checksum instead vm_params["image_checksum"].to_s + # ... then include all regular parameters vm_params["start_job"].to_s + vm_params["image_type"].to_s + vm_params["image_complexity"].to_s + # (nil.to_s => '', so this is fine for vm_params we don't use) vm_params["image_num_colors"].to_s + vm_params["image_colors"].to_s + vm_params["expire_at"].to_s + vm_params["licensee_id"].to_s + # ... then do all the security parameters vm_params["sequence_number"].to_s + vm_params["timestamp"].to_s vm_params["signature"] = sign(string_to_sign) #no problem # Workaround class for handling multipart posts mp = Multipart::MultipartPost.new query, headers = mp.prepare_query(vm_params) # Handles the file parameter in a special way (see /lib/multipart.rb) file.close # mp has read the contents, we can close the file now response = post_form(URI.parse(CREATE_URL), query, headers) logger.info(response.body) response_hash = ActiveSupport::JSON.decode(response.body) # Decode the JSON response string ##I have understood below def sign(string_to_sign) #logger.info("String to sign: '#{string_to_sign}'") Base64.encode64(HMAC::SHA1.digest(DEVELOPER_KEY, string_to_sign)) end # Within Multipart modul I have this: class MultipartPost BOUNDARY = 'tarsiers-rule0000' HEADER = {"Content-type" => "multipart/form-data, boundary=" + BOUNDARY + " "} def prepare_query (params) fp = [] params.each {|k,v| if v.respond_to?(:read) fp.push(FileParam.new(k, v.path, v.read)) else fp.push(Param.new(k,v)) end } query = fp.collect {|p| "--" + BOUNDARY + "\r\n" + p.to_multipart }.join("") + "--" + BOUNDARY + "--" return query, HEADER end end end Thanks for your help.

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  • How do I use rest-client for ruby to post an image?

    - by Angela
    I am trying to find a way to use the Postful API and I need to post an image in the body of the request. I am trying to use rest-client (but am open to other ways): This is how I am trying to use it after looking at the restclient.rb file but I'm still not clear: class ContactPostfulsController < ApplicationController require 'rest_client' RestClient.post 'http://www.postful.com/service/upload', 'the actual image...?', :content_type => 'application/octet-stream' end

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  • I see gem in "gem list" but have "no such file to load"

    - by lublushokolad
    I am on Ubuntu10 sudo apt-get install ruby1.9.1-full then download sources of rubygem 1.3.7 and install it sudo ruby setup.rb then, for example, install sinatra sudo gem install sinatra Finally open irb and type require "rubygems" require "sinatra" and get error LoadError: no such file to load -- sinatra from (irb):2:in `require' from (irb):2 from /usr/bin/irb:12:in `<main>' Gem.path is the same to INSTALLATION DIRECTORY from "gem environment"

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  • Radio button inside anchor element is reset after jQuery click handler

    - by GrievousAngel
    I have a situation where an element, of type radio, is contained in an element. The anchor element has a href but I want to override that behaviour by adding a jQuery 'click' handler to the element. The click handler makes the radio button inside it the selected one within the group. This all works when the anchor is clicked, however, when the radio button is clicked it appears that jQuery resets the selected radio to the previously selected one! Here is a the simplified page that duplicates the issue: <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#a1").click(function(event) { anchorClicked("a1"); return false; }); $("#a2").click(function(event) { anchorClicked("a2"); return false; }); }); function anchorClicked(anchorId) { $('#' + anchorId + ' input:radio').attr("checked", true); alert("Look at what is selected and what happens after the event when this dialog is closed!"); } </script> </head> <body> <form> <ul> <li id="li1"> <a id="a1" href="javascript:alert('default functionality')"> <input value="1" name="rb" type="radio" id="rb1"> <span>Details 1</span> </a> </li> <li id="li2"> <a id="a2" href="javascript:alert('default functionality')"> <input value="2" name="rb" type="radio" id="rb2"> <span>Details 2</span> </a> </li> </ul> </form> </body> Does anyone have any idea how I can prevent jQuery for resetting the radio button?

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  • Writing a spec for helper with Ruby on Rails and RSpec

    - by TK
    I have been writing specs for controllers and models, but I have never written a helper spec. I have no idea where I start. I have the following snippet in application_helper.rb def title(page_title) content_for(:title) { page_title } end How should I write a helper spec on the code? Also if there's any open-source Rails app to show good helper testing/specing, do let me know.

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  • Any special assertion to test if the resulting integer lies within a range

    - by barerd
    I would like to test if an instance variable lies in a range of numbers. I solved the problem by using assert_in_delta but would like to know if there is a formal assertion for this. #part of the tested class def initialize(value = 70 + rand(30)) @value = value end #test_value.rb class ValueTestCase < Test::Unit::TestCase def test_if_value_in_range assert_in_delta(85, p.value, 15) end end

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  • How do I set up a route in rails?

    - by NotDan
    In my routes.rb I have this: map.namespace :admin do |admin| admin.resources :galleries do |galleries| galleries.resources :gallery_images, :as=>'images' end end rake routes shows the route created like this: admin_gallery GET /admin/galleries/:id and when I go to this url in my browser: http://192.168.2.2:3000/admin/galleries/11/ I get this error: Unknown action No action responded to 11 But I would have expected it to use the show action/view, what am I doing wrong?

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  • Where do you extend classes in your rails application?

    - by ro
    Just about to extend the Array class with the following extension: class Array def shuffle! size.downto(1) { |n| push delete_at(rand(n)) } self end end However, I was wondering where a good place to keep these sort of extensions. I was thinking environment.rb or putting in its own file in the initializers directory.

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  • Rails send mail with GMail

    - by Danny McClelland
    Hi Everyone, I am on rails 2.3.5 and have the latest Ruby installed and my application is running well, except, GMail emails. I am trying to setup my gmail imap connection which has worked previously but now doesnt want to know. This is my code: # Be sure to restart your server when you modify this file # Uncomment below to force Rails into production mode when # you don't control web/app server and can't set it the proper way # ENV['RAILS_ENV'] ||= 'production' # Specifies gem version of Rails to use when vendor/rails is not present RAILS_GEM_VERSION = '2.3.5' unless defined? RAILS_GEM_VERSION # Bootstrap the Rails environment, frameworks, and default configuration require File.join(File.dirname(__FILE__), 'boot') Rails::Initializer.run do |config| # Gems config.gem "capistrano-ext", :lib => "capistrano" config.gem "configatron" # Make Time.zone default to the specified zone, and make Active Record store time values # in the database in UTC, and return them converted to the specified local zone. config.time_zone = "London" # The internationalization framework can be changed to have another default locale (standard is :en) or more load paths. # All files from config/locales/*.rb,yml are added automatically. # config.i18n.load_path << Dir[File.join(RAILS_ROOT, 'my', 'locales', '*.{rb,yml}')] #config.i18n.default_locale = :de # Your secret key for verifying cookie session data integrity. # If you change this key, all old sessions will become invalid! # Make sure the secret is at least 30 characters and all random, # no regular words or you'll be exposed to dictionary attacks. config.action_controller.session = { :session_key => '_base_session', :secret => '7389ea9180b15f1495a5e73a69a893311f859ccff1ffd0fa2d7ea25fdf1fa324f280e6ba06e3e5ba612e71298d8fbe7f15fd7da2929c45a9c87fe226d2f77347' } config.active_record.observers = :user_observer end ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS.merge!(:default => '%d/%m/%Y') ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS.merge!(:default => '%d/%m/%Y') require "will_paginate" ActionMailer::Base.delivery_method = :smtp ActionMailer::Base.smtp_settings = { :enable_starttls_auto => true, :address => "smtp.gmail.com", :port => 587, :domain => "XXXXXXXX.XXX", :authentication => :plain, :user_name => "XXXXXXXXXX.XXXXXXXXXX.XXX", :password => "XXXXX" } But the above just results in an SMTP auth error in the production log. I have read varied reports of this not working in Rails 2.2.2 but nothing for 2.3.5, anyone got any ideas? Thanks, Danny

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