This probably has a simple answer, but I don't know it.
Let's say I have a ruby script called hello.rb
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
end
I want to call that script from within an HTML document. How would I do
so? Within the HTML document, would I just treat it the same way I call
external javascript:
<script src="path/to/hello.rb" type="text/ruby"></script>
How would I make the function call?
--
Posted via http://www.ruby-forum.com/.
Hi,
I think the best way is to use eruby. You then just have to put your script inside '<%' and '%>' (no output in the html) or '<%=' and '%>' (with output). For instance :
...
<body>
<% def greeting %>
<% "Hello world!" %>
<% end %>
<%= greeting %>
</body>
...
I hope this will help.
Naked Sushi a écrit :
This probably has a simple answer, but I don't know it.
Let's say I have a ruby script called hello.rb
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
endI want to call that script from within an HTML document. How would I do
so? Within the HTML document, would I just treat it the same way I call
external javascript:<script src="path/to/hello.rb" type="text/ruby"></script>
How would I make the function call?
I want to call that script from within an HTML document. How would I do
so? Within the HTML document, would I just treat it the same way I call
external javascript:
The call to a script embedded or linked to an HTML document would have
to be performed by some software reading the HTML. That software could
be on the client side (like a browser) or on the server side (like an
HTTP server plugin). JavaScript usually runs in the browser, and so
<script> tags are normaly ignored by the server.
To embed Ruby in HTML, the most popular choice seems to be ERB:
http://www.ruby-doc.org/stdlib/libdoc/erb/rdoc/classes/ERB.html
That woud be interpreted on the server-side, provided your HTTP server
is properly configured.
If you want to use Ruby to generate dynamic pages, you should look
into Ruby on Rails or Camping. Those provide not only a way to embed
Ruby in HTML, but some extra functionality to build dynamc sites.
Cheers,
Luciano
Naked Sushi <runfaster@runawaysquirrels.com> writes:
This probably has a simple answer, but I don't know it.
The answer is "no". 
Let's say I have a ruby script called hello.rb
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
endI want to call that script from within an HTML document. How would I do
so?
You can't.
Within the HTML document, would I just treat it the same way I call
external javascript:
It's not javascript, so no.
How would I make the function call?
Use eruby as someone suggested, use server-parsed html (SHTML), use a
CGI instead of a plain HTMl file, probably something else I haven't
thought of. But you can't do it with just plain HTML.
-=Eric
Naked Sushi wrote:
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
endI want to call that script from within an HTML document. How would I do
so?
Read this (it's very short):
http://xkr.us/js/clientserver
When you see "PHP" in there, think "My Ruby Script". For your question,
when you see "JS", you can think "HTML".
Hopefully that very brief story will help you understand how the
'magic' of the WWW works; where your Ruby code can run on the server,
and why you can't run server code from a user's web browser. The only
thing you can do is use HTML and/or JavaScript to make a new request
back to the web server, and get the results from it.
# Let's say I have a ruby script called hello.rb
From: list-bounce@example.com:
#
# #!/usr/bin/ruby
# def greeting ()
# return "Hello world!"
# end
#
# I want to call that script from within an HTML document. How
# would I do
# so? Within the HTML document, would I just treat it the same
# way I call
# external javascript:
#
# <script src="path/to/hello.rb" type="text/ruby"></script>
#
# How would I make the function call?
if you mean like javascript, there is something close, and it's activescriptruby http://www.geocities.co.jp/SiliconValley-PaloAlto/9251/ruby/main.html
close since it runs only on windows ie.
hope someone would write a ruby equivalent to javascript. that would be a killer.
kind regards -botp
Naked Sushi wrote:
This probably has a simple answer, but I don't know it.
Let's say I have a ruby script called hello.rb
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
endI want to call that script from within an HTML document. How would I do
so? Within the HTML document, would I just treat it the same way I call
external javascript:<script src="path/to/hello.rb" type="text/ruby"></script>
How would I make the function call?
I have been interested in making this happen using an applet in JRuby. By wiring in a call to the applet that loads the ruby file, it should be possible to get the applet to run the script and return some result. The interplay between the page and the applet would have to go over "liveconnect" or something similar to work.
The applet part is basically taken care of, and has been used to create an IRB GUI that runs in a browser. The LiveConnect/javascript stuff I have only done very cursory research into, but it seems that it should be possible.
If you're interested in this angle further, you can contact me or join the jruby lists...or just talk about it here, though I'm not as good about checking ruby-talk lately
--
Charles Oliver Nutter, JRuby Core Developer
Blogging on Ruby and Java @ headius.blogspot.com
Help spec out Ruby today! @ Welcome to headius.com
headius@headius.com -- charles.nutter@sun.com
Naked Sushi wrote:
This probably has a simple answer, but I don't know it.
Let's say I have a ruby script called hello.rb
#!/usr/bin/ruby
def greeting ()
return "Hello world!"
end
I believe what you're looking for is explained in these documents:
http://www.rubycentral.com/book/web.html
http://nubyonrails.com/articles/2006/02/01/rjs-and-content-type-header
The first method is the easy one and will do exactly what you want - at
least, I think so since I have a similar requirement. I need to be able
to run Ruby on one server but be able to call a script on the first
server from a different server's HTML content. I've done something
similar with Python and PHP and it worked fine. So I believe the first
link examples should work as well though I still haven't tried it. The
second document about RJS appears to provide a more complicated way to
do the same thing but again I'm not absolutely certain since I haven't
tried it out 
Incidentally, if you set up Ruby to output HTML in the above fashion,
the example call you used:
<script src="path/to/hello.rb" type="text/ruby"></script>
would have to be done as follows:
<script src="path/to/hello.rb"></script>
Hope this helps, or at least puts you on the right track
Fahim
--
Posted via http://www.ruby-forum.com/\.
côme wrote:
I think the best way is to use eruby.
I think that's the problem. I can make it work with eruby, but I would
rather just have it as an external script.
--
Posted via http://www.ruby-forum.com/\.
Peña wrote:
hope someone would write a ruby equivalent to javascript. that would be a killer.
It's rather unprobable this will happen. Firstly, JavaScript is
standardised, for better or worse. I've seen the first bout of browser
wars, I've seen the second, Lite edition (e.g. how much of Dojo will
break on $BROWSER) - yay, very subtly incompatible handling of
window.location.href updates and onload/onclose events; I don't want to
see the third bout, aka how many scripting language interpreters will
you bundle with or half-assedly reimplement in $BROWSER.
Not to mention the development principles of the two languages (or
rather standard libraries) are almost contrary, you'd have to rip out
and retrofit significant amounts of Ruby to be able to embed it safely.
David Vallner
javascript is a rubyer language than it looks:
http://whytheluckystiff.net/clog/ruby/rubyDotJs.html
martin
On 12/22/06, Peña, Botp <botp@delmonte-phil.com> wrote:
hope someone would write a ruby equivalent to javascript. that would be a killer.
For someone that likes Ruby, Javascript does not matter.
It feels like a crippled down, specialized language.
Ruby syntax would be a lot nicer.
And that Javascript is standardized doesnt make it
better. Its ok if everyone can use standardized
Javascript - but I personally, I'd dump Javascript
the moment it would be possible to live with
pure Ruby instead. But guess Javascript is stuck
for years 
--
Posted via http://www.ruby-forum.com/.
Marc Heiler wrote:
For someone that likes Ruby, Javascript does not matter.
It feels like a crippled down, specialized language.
It's *supposed to be* specialised. Different roles and all that. Where
JS is used, you're not supposed to be expressing complex logic anyway.
Before anyone mentions Ajax, refer to my gruesome bias against the
hack^Wconcept. It's also *supposed to be* crippled. JS is a language for
a domain that requires restrictions first because of the possible impact
and woes fixing if there was a security issue with the language itself.
If I was a nastier person I'd say you're missing the point by leagues.
Oh, wait, I -am-, so, you are. Ruby wasn't around when the need for
scripting web browsers emerged. So, JS got into the standard. Standards
are the only thing that preserve the web from collapsing on itself in a
rain of tears and any touching them will lead to at best pain. (So, can
anyone recall actual use of XHTML 1.1 in the wild?). And even if Ruby
were around by then, it wouldn't be the Ruby you know, the domain itself
would necessitate crippling and specialisation. Allowing it to be used
"pure" is completely impossible.
By the way, you're confusing language and programming environment. JS
the language is, in terms of language power, incrementally or at worst
linearly inferior than Ruby the language, and could probably match it in
more features than you can think of. The standard library is Good Enough
for the task the language is primarily supposed to fulfill (script a
HTML rendering engine).
David Vallner
<...>
(So, can
anyone recall actual use of XHTML 1.1 in the wild?).
<...>
Yeeep: Musings
Regards,
Rimantas
Anyone thinking of Javascript as crippled or inferior would do well to
take a look at Loell
martin
On 12/23/06, David Vallner <david@vallner.net> wrote:
By the way, you're confusing language and programming environment. JS
the language is, in terms of language power, incrementally or at worst
linearly inferior than Ruby the language, and could probably match it in
more features than you can think of. The standard library is Good Enough
for the task the language is primarily supposed to fulfill (script a
HTML rendering engine).
Very interesting, Martin. Thanks for the link.
But I must say I failed to notice how Loell would change the mind of
somebody who considers Javascript crippled or inferior (except to
demonstrate that Javascript is Turing Complete).
Cheers, and a healthy, peaceful and productive 2007 to all!
On 12/23/06, Martin DeMello <martindemello@gmail.com> wrote:
Anyone thinking of Javascript as crippled or inferior would do well to
take a look at Loell
--
Luciano
The guy obviously knows what he's doing, and he had a choice of
languages in which to implement his stuff - he clearly felt javascript
was up to it. I would never have tried something like that in java or
c, for instance.
martin
On 12/24/06, Luciano Ramalho <ramalho@gmail.com> wrote:
On 12/23/06, Martin DeMello <martindemello@gmail.com> wrote:
> Anyone thinking of Javascript as crippled or inferior would do well to
> take a look at LoellVery interesting, Martin. Thanks for the link.
But I must say I failed to notice how Loell would change the mind of
somebody who considers Javascript crippled or inferior (except to
demonstrate that Javascript is Turing Complete).