thumbor / ruby-thumbor

ruby-thumbor is the client library to thumbor.

ruby-thumbor

ruby-thumbor is the Ruby client to the thumbor imaging service (http://github.com/thumbor/thumbor).

Features

• Generate thumbor encrypted URLs
• Obtain metadata from image operations in thumbor

Install

gem install ruby-thumbor

Using it

require 'ruby-thumbor'

image = Thumbor::Cascade.new('my-security-key', 'remote-image.com/path/to/image.jpg')
image.width(300).height(200).watermark_filter('http://remote-image.com/path/to/image.jpg', 30).generate

# url will contain something like:
# /2913921in321n3k2nj32hjhj3h22/remote-image.com/path/to/image.jpg

# Now you just need to concatenate this generated path, with your thumbor server url

or

require 'ruby-thumbor'

crypto = Thumbor::CryptoURL.new 'my-security-key'

url = crypto.generate(width: 200, height: 300, image: 'remote-image.com/path/to/image.jpg')

Available Thumbor arguments

meta: bool # flag that indicates that thumbor should return only meta-data on the operations it would otherwise perform;

crop: [<int>, <int>, <int>, <int>] # Coordinates for manual cropping. The first item is the two arguments are the coordinates for the left, top point and the last two are the coordinates for the right, bottom point (thus forming the square to crop);

width: <int> # the width for the thumbnail;

height: <int> # the height for the thumbnail;

flip: <bool> # flag that indicates that thumbor should flip horizontally (on the vertical axis) the image;

flop: <bool> # flag that indicates that thumbor should flip vertically (on the horizontal axis) the image;

halign: :left, :center or :right # horizontal alignment that thumbor should use for cropping;

valign: :top, :middle or :bottom # horizontal alignment that thumbor should use for cropping;

smart: <bool> # flag that indicates that thumbor should use smart cropping;

filters: ['blur(20)', 'watermark(http://my.site.com/img.png,-10,-10,50)'] # array of filters and their arguments

If you need more info on what each option does, check thumbor's documentation at https://thumbor.readthedocs.io/en/latest/index.html.

Uploading to Rubygems

To upload a new version to Rubygems, simply update the version on the file lib/thumbor/version.rb then use the commit message Bump to <new version>, this will trigger the release process on Github actions.

License

(The MIT License)

Copyright (c) 2022 Bernardo Heynemann [email protected]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

ruby-thumbor's Issues

Please add debug option

It would be helpful to have the debug boolean option.

remove unused file

Very simple fix and no big deal.

Looks like the https://github.com/heynemann/ruby-thumbor/blob/master/install-python.sh file is not used and can be removed since this commit:

14235b7

Thumbor.key global value is set in Thumbor::CryptoURL initializer

This can cause weird behavior in specs or other environments where the key might change. It's also not a good practice for ruby.

ruby-thumbor/lib/thumbor/crypto_url.rb

Line 11 in b2cfed1

Thumbor.key = key

Upgrade to Thumbor 3 secure url style

In case anybody may need this or can upgrade this gem to use Thumbor3 secure urls style.

Currently I use the following quick helper (build from standard gems only):

url = 'https://xxxx.cloudfront.net/200x200/images/12345.jpg'

def thumbor_secure_url(url)
  uri = URI.parse(url)
  hmac = OpenSSL::HMAC.digest("sha1", SECURITY_KEY, uri.path[1..-1])
  signature = Base64.encode64(hmac).tr("+", "-").tr("/", "_").chomp
  "#{uri.scheme}://#{uri.host}/#{signature}#{uri.path}"
end

Also JS version inspired original: https://github.com/dcaramelo/ThumborUrlBuilder/blob/master/index.js#L258-L278

Spec "should allow thumbor to decrypt it properly with filters" is failing

I am attempting to run the ruby-thumbor specs on my local machine and they are all passing except for one. I have Thumbor 3.5.2 installed and am testing with Ruby 1.9.3.

1) Thumbor::CryptoURL#generate :old => true should allow thumbor to decrypt it properly with filters
   Failure/Error: decrypted["filters"].should == "quality(20):brightness(10)"
     expected: "quality(20):brightness(10)"
          got: "" (using ==)
   # ./spec/ruby-thumbor_spec.rb:433:in `block (2 levels) in <top (required)>'

The most recent travis-ci build for ruby-thumbor is green but it built with Thumbor 3.0.1. My current guess is that something changed between 3.0.1 and 3.5.2 that is causing this test to fail.