Ruby QR code decoder?

Rails
1

I’d like to use be able to decode QR codes that people submit to my
rails app. I’m using phonegap for iPhone, so I need to create a work-
around for a native QR code reader. The best I can come up with is
having someone take a picture of the code and submit it, then have
ruby parse it.*

I’ve searched this forum and online, and all I can find is the zxing
library for Java. Question is:

a) is there a rails plugin or a ruby gem that can decode a qr code
image
or b) is it possible to run a java command from ruby?

Thanks for any guidance.

Cameron

*yes, I will be looking into obj-c eventually, but want to prototype
asap

2

i don’t mean to be a jerk, but “asap?” really?

http://www.ruby-forum.com/topic/198410

-eric

3

Eric: Why so incredulous? My point is that I’d rather prototype
something quickly for user testing before I try learn a completely new
language.

To anyone else interested: I found out how to execute java using %x|
java …| . I think latency would be an issue in the scenario I’m
describing, but I’m going to give it a shot.

Cameron

4

Just that in 10 months of asap you could have implemented any of:

Nothing personal, just sayin’. And yeah, there seem to be any number
of system call solutions.

-eric

5

Eric wrote:

Just that in 10 months of asap you could have implemented any of:

camera - QR code (2D barcode) coding and decoding algorithms? - Stack Overflow

Nothing personal, just sayin’. And yeah, there seem to be any number
of system call solutions.

Or use JRuby and RJB.

-eric

Best,

Marnen Laibow-Koser
http://www.marnen.org
[email protected]

6

Eric, I think I see the confusion. Check
Ruby QR code decoder? - Rails - Ruby-Forum,
you’ll see that the timestamps are borked (see your reply from 10
months ago). In any event, thanks for the link.

7

ckundo wrote:

Eric, I think I see the confusion. Check
Ruby QR code decoder? - Rails - Ruby-Forum,
you’ll see that the timestamps are borked (see your reply from 10
months ago). In any event, thanks for the link.

There is nothing wrong with the timestamps. They’re just European-style
DMY.

Best,

Marnen Laibow-Koser
http://www.marnen.org
[email protected]

8

Thanks, I’ll give those a shot.

Cameron

On Nov 1, 6:00 pm, Marnen Laibow-Koser <rails-mailing-l…@andreas-

9

Hi, friends. I happen to come to this thread. I am an barcode expert. I
know good barcode site(http://www.onbarcode.com/) where you can find
various qr code decoders.