mirror of
https://github.com/rubyjs/therubyracer
synced 2023-03-27 23:21:42 -04:00
158 lines
No EOL
4.5 KiB
Markdown
158 lines
No EOL
4.5 KiB
Markdown
# therubyracer
|
|
|
|
* [http://github.com/cowboyd/therubyracer](http://github.com/cowboyd/therubyracer)
|
|
* [http://groups.google.com/group/therubyracer](http://groups.google.com/group/therubyracer)
|
|
* [irc://irc.freenode.net/therubyracer](http://groups.google.com/group/therubyracer)
|
|
* [Documentation](https://github.com/cowboyd/therubyracer/wiki)
|
|
|
|
## DESCRIPTION:
|
|
|
|
Embed the V8 Javascript interpreter into Ruby.
|
|
|
|
|
|
## FEATURES/PROBLEMS:
|
|
|
|
* Evaluate Javascript from with in Ruby
|
|
* Embed your Ruby objects into the Javascript world
|
|
* Manipulate JavaScript objects and call JavaScript functions from Ruby
|
|
* API compatible with the The Ruby Rhino (for JRuby: http://github.com/cowboyd/therubyrhino)
|
|
|
|
## SYNOPSIS:
|
|
|
|
gem install therubyracer ;: stable
|
|
gem install therubyracer --pre ;: bleeding edge
|
|
|
|
then in your ruby code
|
|
|
|
require 'v8'
|
|
|
|
evaluate some simple javascript
|
|
|
|
cxt = V8::Context.new
|
|
cxt.eval('7 * 6') #=> 42
|
|
|
|
embed values into the scope of your context
|
|
|
|
cxt['foo'] = "bar"
|
|
cxt.eval('foo') # => "bar"
|
|
|
|
embed ruby code into your scope and call it from javascript
|
|
|
|
cxt["say"] = lambda {|word, times| word * times}
|
|
cxt.eval("say('Hello', 3)") #=> HelloHelloHello
|
|
|
|
embed a ruby object into your scope and access its properties/methods from javascript
|
|
|
|
class MyMath
|
|
def plus(lhs, rhs)
|
|
lhs + rhs
|
|
end
|
|
end
|
|
|
|
cxt['math'] = MyMath.new
|
|
cxt.eval("math.plus(20,22)") #=> 42
|
|
|
|
make a ruby object *be* your global javascript scope.
|
|
|
|
math = MyMath.new
|
|
V8::Context.new(:with => math) do |cxt|
|
|
cxt.eval("plus(20,22)") #=> 42
|
|
end
|
|
|
|
you can do the same thing with Object#eval_js
|
|
|
|
math.eval_js("plus(20,22)")
|
|
|
|
## Different ways of loading javascript source
|
|
|
|
In addition to just evaluating strings, you can also use streams such as files.
|
|
|
|
evaluate bytes read from any File/IO object:
|
|
|
|
File.open("mysource.js") do |file|
|
|
cxt.eval(file, "mysource.js")
|
|
end
|
|
|
|
or load it by filename
|
|
|
|
cxt.load("mysource.js")
|
|
|
|
|
|
## Safe by default, dangerous by demand
|
|
|
|
The Ruby Racer is designed to let you evaluate javascript as safely as possible unless you tell it to do something more
|
|
dangerous. The default context is a hermetically sealed javascript environment with only the standard javascript objects
|
|
and functions. Nothing from the ruby world is accessible at all.
|
|
|
|
For ruby objects that you explicitly embed into javascript, by default only the _public_ methods _below_ `Object` are
|
|
exposed by default. E.g.
|
|
|
|
class A
|
|
def a
|
|
"a"
|
|
end
|
|
|
|
def to_s
|
|
super
|
|
end
|
|
end
|
|
|
|
class B < A
|
|
def b
|
|
"b"
|
|
end
|
|
end
|
|
|
|
|
|
V8::Context.new do |cxt|
|
|
cxt['a'] = A.new
|
|
cxt['b'] = B.new
|
|
cxt.eval("a.a") # => 'a'
|
|
cxt.eval("b.b") # => 'b'
|
|
cxt.eval("b.a") # => 'a'
|
|
cxt.eval("b.to_s") # => #<B:0x101776be8> (because A explicitly defined it)
|
|
cxt.eval("b.object_id") #=> undefined, object_id is on Object
|
|
end
|
|
|
|
If needed, you can override the [Ruby Access](https://github.com/cowboyd/therubyracer/blob/master/lib/v8/access.rb)
|
|
to allow whatever behavior you'd like
|
|
|
|
More documentation can be found on the [github wiki](https://github.com/cowboyd/therubyracer/wiki)
|
|
|
|
## REQUIREMENTS:
|
|
|
|
* python >= 2.5 (required to compile v8)
|
|
* C++ compiler
|
|
|
|
|
|
## DEVELOP
|
|
* git clone git://github.com/cowboyd/therubyracer.git
|
|
* cd therubyracer
|
|
* git submodule update --init
|
|
* bundle install
|
|
* rake compile
|
|
|
|
## LICENSE:
|
|
|
|
(The MIT License)
|
|
|
|
Copyright (c) 2009,2010,2011 Charles Lowell
|
|
|
|
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. |