Resize image on the client side with Rails [closed] - ruby-on-rails

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I was wondering if there is any way to resize an image on the client side before it is uploaded to the server. I'm using nested attributes for the image portion of the form. Ideally, it wouldn't be uploaded immediately - just resized and it would only then be upload upon submission of the form.
Does anyone know of any plugins that will do this?
EDIT: If there are plugins that will work with IE that would be great too.

See these:
Image resizing client-side with javascript before upload to the server
http://www.rubydesigner.com/blog/resizing-images-before-upload-using-html5-canvas
Here's the code for the last one:
https://github.com/josefrichter/resize/blob/master/public/preprocess.js
https://github.com/josefrichter/resize

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iOS Flicker API to simply upload a public image? [closed]

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Is there suppose to be a Flickr API (provided by Flickr)?
If not, i see a couple of flickr "kits" on GitHub (objectiveflickr and flickrkit).
Which is preferred?
Or maybe it is better to just write my own custom routine (all i need to do is authenticate (if required) and upload an image)?
Your thoughts appreciated.
Their website lists APIs.
https://www.flickr.com/services/api/
First hit on Google for Flickr API.

Avatar rails generator [closed]

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I am trying to find some rails gem or any API delivering some random (non figurative) picture for avatar users, as the one that SO uses.
I tried gravatar but when I create some random hash and that I call the api via http://www.gravatar.com/avatar/#{hash}, I always get the same default image (independently of the hash)
So perhaps I misunderstood the purpose of gravatar, so is there any API or rails gem offering this service ?
Just add ?d=identicon to your query.
Docs here

Looking for an open source PDF Framework for iPad [closed]

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My customer wants a pdf reader which has a page curl effect. Also, he wants it to be zoomable as well. I tried using the UIPageViewController but it doesn't support zooming (as far as I know). I also tried using both UIScrollViewController and UIPageViewController by switching between these 2, but it's not so smooth.
Does anyone know any free framework that meets my requirements?
I don't want any content searching, highlighting or anything, just the reader and thumbnail view.
Have a look at this:
https://www.cocoacontrols.com/controls/pdf-reader-core
https://www.cocoacontrols.com/controls/pdfreportkit
Hope this helps...

Capture screenshots for a Ruby on Rails application [closed]

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I have a Rails app that I want to capture a screenshot of a webpage when the user enters a url.
Is it possible to do this in Rails (is there any gem that would do this?)
If not, are there any reliable services that generate live screenshots
I use IMGKit gem for that: https://github.com/csquared/IMGKit
Related topic: How to respond_to PNG or JPG in Rails and generate image from HTML?
ScreenCap gem which uses PhantomJS under the hood. Grab whole pages or just specific divs, or even exact x y coordinates.
I have used GrabzIt for this. This is quite simple.

Multiple files uploading on Ruby on Rails 3 [closed]

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I would like to upload multiple pictures to my Rails 3 application. I am currently using Paperclip to upload a picture, and I have some post processing operations assigned to the model Photo.
I saw some samples on the net (integrating uploadify, swfupload or some other libraries), but none was very detailed, and each one misses some steps.
What is the simplest way to do this?
A good JQuery uploader is jQuery-File-Upload . It has some paperclip samples and you can find a demo here
#params = {
"FacialImage" => UploadIO.new(File.new('C:\temp\ATDD\Test\test\sachin.jpg'), "image/jpeg"),
"Login" => UploadIO.new(File.new('C:\temp\ATDD\Test\test\login.txt'), "application/json")
}

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