In this screencast, I demonstrate how to work with the latest Rails as well as navigate through the source.
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Wanna Learn Objective-C, Cocoa, and iOS?
Try this channel. He does a fantastic job of explaining the fundamentals. The best series I’ve found for teaching new students.
YouTube Channel: http://www.youtube.com/user/AppleProgramming
Tutorial List: His Site
Posted in Objective-C, Screencast
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RubyHead Minute: Better RSpec Guide
Better RSpec Guide from Joon You on Vimeo.
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Enabling Public Access To Development Machine
Show Note
open ssh tunnel from your local machine
For running Rails app in development, you can do this since rails s runs on port 3000.
localhost$ ssh -R 8088:localhost:3000 remote_server -N &
This creates a tunnel that binds remote TCP port 8088 to local TCP port 3000.
-R flag is for remote binding which tell the remote server to send TCP traffic on port 8088 to my machine. This is basically reverse of -L which binds the local machine’s port to remote.
8088: specifies the port on remote server. Therefore, following command on remote server will give a result assuming that I’m running a Rails app on port 3000.
remote_server$ curl localhost:8088
localhost is the host, obviously my local machine where the traffic will bind to.
:3000 is the local port you want to bind the traffic to.
-N tells ssh to not execute a remote command. Should always use this if we’re just tunneling.
& makes it run in background.
install socat if not installed on remote server
This is the definition from socat.
Socat is a command line based utility that establishes two bidirectional byte streams and transfers data
between them
For Ubuntu, remote_server$ sudo apt-get install socat will do.
run socat to relay public traffic
On remote server, expose a public port and then route the traffic to local port that’s bound to my local machine.
remote_server$ socat TCP-LISTEN:8090,fork,reuseaddr TCP-CONNECT:127.0.0.1:8088 &
TCP-LISTEN:8090,fork,reuseaddr tells socat to listen TCP on port 8090, creating a server at that port. The options are self-explanatory.
TCP-CONNECT:127.0.0.1:8088 tells socat to connect TCP to localhost at port 8088 which is bound to my machine.
Posted in Screencast
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Gem Annoyance – SSL
Sick of this when you’re bundle install?
`connect': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)
The fix:
I use RVM thanks to Wayne’s awesome response to my issue reported in IRC channel.
me$ gem update --system
me$ rvm get head
me$ rvm osx-ssl-certs update all
**UPDATE**
Forgot to include updating system gem.
Posted in Tutorial
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Ruby 2.0 – Prepending Module
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Ruby 2.0 – Getting Started & Named Parameters
Start of me playing with Ruby 2.0. Covers my installation and named parameter to start.
Ruby 2.0 – Getting Started & Named Parameters from Joon You on Vimeo.
Posted in Screencast, Tutorial
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Fresh OS X Mountain Lion Install & Homebrew
Ok, so my desktop computer blew up. The power supply died and in the process, it screwed up my hard drive. Rather than restoring from backup, I decided to do a fresh install to clean out old crap.
To my shock, when I tried to install Homebrew, it failed miserably even though I installed Xcode and Commandline Tools. It appears that simply running
ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
does not work! Instead, I get ugly
e:178: syntax error, unexpected ':', expecting $end
WTF?
Then again, it hit me that I was in fact running Ruby that came with Mac OS X. In order to install Homebrew on fresh install of Mountain Lion, here’s what you need to do:
>curl -O https://raw.github.com/mxcl/homebrew/go
>sh go
So simple, yet it’s a little gotcha that can drive you nuts.
Once you have brew, then you can install RVM and all other good stuff.
Posted in Tutorial
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