Jungle Disk is a really neat application that allows you to store/backup files online using the Amazon S3 storage service. Basically it is a really inexpensive, fast and efficient way to save important files and access them from anywhere. On top of all that, it runs on just about every platform I would ever use: Linux, Mac OS X, and Windows. (In no order of preference, oh wait... )
If you're not much into computer science, that's pretty much all you need to know. If you are though, keep reading. :)
Jungle Disk is not open source. This would normally raise a huge dilemma for me. Without it being open source, how can I be absolutely sure that I will be able to retrieve my data in the future? The software could have a lockout feature of some kind hidden inside the application that would prevent me from getting my data. I refuse to be held hostage by stupid software!
(By no means am I an open source
zealot purist that only uses free software. I use a few high quality closed source, commercial applications (VMWare workstation comes to mind) I just think that open source software tends to be of much higher quality and is able to mature a lot faster than your typical closed source variety. I also detest software patents.)
Jungle Disk is a bit different, even though it's closed source, they have released a portion of their code under the GPL: the decoding/retrieval code. What this proves is that your data can be retrieved without any dependence on closed source, secretive, software.
But I still don't want to take their word for it. So I set out to compile the code and try it myself. The code is written for Visual Studio (which only runs on windows), but that's not so much of a problem because the Mono project has brought most of the .NET framework to Linux.
Here's how to compile the Jungle disk retrieval code on Linux using Mono:
Install the latest version of Mono (I used 1.2.4. 220.127.116.11 didn't have all of the functionality I needed).
Download and extract the source code:
mkdir jds cd jds wget http://downloads.jungledisk.com/jungledisk/JungleDiskSourceExample.zip unzip JungleDiskSourceExample.zip
Compile the code:
gmcs *.cs -r:System.Web -out:jungle_example.exe
Cool! It compiled without warnings nor errors.
Now try running it:
mono jungle_example.exe Your_S3_ID Your_S3_Key listbuckets Error executing command: Error getting response stream (Trust failure): TrustFailure System.Net.WebException: Error getting response stream (Trust failure): TrustFailure ---> System.Net.WebException: Error getting response stream (Trust failure): TrustFailure ---> System.IO.IOException: The authentication or decryption has failed. ---> Mono.Security.Protocol.Tls.TlsException: Invalid certificate received from server.
Ouch, we're not accepting the certificate for whatever reason. I don't know much about CSharp at all, but I found a page on the Mono project site that explains the problem and possible solutions. I applied the dumbest of all the possible solutions, which is to ignore the certificate trust issue altogether -- caveat emptor. Here's my patch.
Apply the patch and recompile
wget http://tinyurl.com/2zutxz -O - | patch -p1 gmcs *.cs -r:System.Web -out:jungle_example.exe
Try running again:
mono jungle_example.exe Your_S3_ID Your_S3_Key listbuckets
If it lists your buckets, it worked!
You can also list files in the directory like so:
mono jungle_example.exe Your_S3_ID Your_S3_Key dir default / mono jungle_example.exe Your_S3_ID Your_S3_Key dir default /pictures mono jungle_example.exe Your_S3_ID Your_S3_Key dir default /music
You can retrieve your files like so:
mono jungle_example.exe ID Key getfile default "/Some File.zip" stuff.zip