| # NOTICE: to get Nginx+Unicorn best-practices configuration see the gist https://gist.github.com/3052776 | |
| $ cd /usr/src | |
| $ wget http://nginx.org/download/nginx-1.2.1.tar.gz | |
| $ tar xzvf ./nginx-1.2.1.tar.gz && rm -f ./nginx-1.2.1.tar.gz | |
| $ wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.30.tar.gz | |
| $ tar xzvf pcre-8.30.tar.gz && rm -f ./pcre-8.30.tar.gz | |
| $ wget http://www.openssl.org/source/openssl-1.0.1c.tar.gz |
| class ApplicationController < ActionController::Base | |
| # Tell Devise to redirect after sign_in | |
| def after_sign_in_path_for(resource_or_scope) | |
| some_url(:protocol => 'http') | |
| end | |
| # Tell Devise to redirect after sign_out | |
| def after_sign_out_path_for(resource_or_scope) | |
| some_url(:protocol => 'http') | |
| end |
| # I put this as spec/support/factory_girl_singleton.rb | |
| # this get required from spec_helper.rb | |
| # creates a class variable for factories that should be only created once | |
| class Factory | |
| @@singletons = {} | |
| def self.singleton(factory_key) | |
| begin | |
| @@singletons[factory_key] = Factory.create factory_key | |
| rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique | |
| end |
By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:
/people/6
But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.
| #!/usr/bin/env ruby | |
| # s3-delete-bucket.rb | |
| # Fog-based script for deleting large Amazon AWS S3 buckets (~100 files/second) | |
| # Forked from this excellent script: https://github.com/SFEley/s3nuke | |
| require 'rubygems' | |
| require 'thread' | |
| require 'fog' |
| class ArticleImageUploader < ImageUploader | |
| process :fix_exif_rotation | |
| process :strip | |
| process :convert => 'jpg' | |
| process :quality => 85 # Percentage from 0 - 100 | |
| version :gallery_thumb do | |
| process :resize_to_fill => Settings.images.article_images.processing.gallery_thumb #44x44 | |
| end |
by Jonathan Rochkind, http://bibwild.wordpress.com
Capistrano automates pushing out a new version of your application to a deployment location.
I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".
| # One liner for counting unique IP addresses from nginx logs | |
| # Feel free to comment with better ideas - I'm sure it's not the best way of doing this (I'm no awk ninja!) | |
| # | |
| # Sample output: | |
| # | |
| # $ cat example.com.access.log | awk -F " " '{a[$1]++ } END { for (b in a) { print b, "\t", a[b] } }' | |
| # 66.65.145.220 49 | |
| # 92.63.28.68 126 | |
| cat example.com.access.log | awk -F " " '{a[$1]++ } END { for (b in a) { print b, "\t", a[b] } }' |
| fields = [:switch, :sha_ind, :dtdm, :utdm, :ttdm, :actual] | |
| def create_struct name, fields | |
| Struct.new(name, *fields) | |
| end | |
| def create_singleton_struct name, fields | |
| if Struct::const_defined? name | |
| Struct.const_get name | |
| else |
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |