Rails - Dec 2006 - Scaping quotes and backslashes (I hope you understand my pro

Hi you all, I have a weird problem escaping characters.

The user types in a text area the following:
<a href="javascript: void(0);" class="defns"
onmouseover="coolTip(''&lt;a
href=\''#\''&gt;Appears as secondary character
in...&lt;/a&gt;'',
STICKY,MOUSEOFF, TEXTSIZE, ''1.5em'',
FGCOLOR,''rgb(224,244,181)'');"
onmouseout="nd();">Hello</a>

When the page is rendered with the .to_html of RedCloth this works.

(I''m using a Javscript code called CoolTip, that, when the mouse is
over
a word or words with this javascript, a tip appears. In this tip, a link
can be written. The whole sentence about is the called to the
javascript, but this is not important)

I don''t want the user to type this stuff. So, I write that in rails, in
a string:

semantic_link = ''<a href="javascript: void(0);"
class="defns"
onmouseover="coolTip(\''&lt;a href=\\\''#\\\''
&gt;Appears as secondary
character in...&lt;/a&gt;\'', STICKY, MOUSEOFF, TEXTSIZE,
\''1.5em\'',
FGCOLOR,\''rgb(224,244,181)\'');"
onmouseout="nd();">Hello</a>''

But this does not work; what rails renders is a mess. Am I doing
something wrong escaping the rare characters? Cause the code at the very
beginning does work, so the problem isn''t RedCloth or the javascript
call...

Thanks :(

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Can you maybe boil it down to a smaller example?  The only thing I can
think of is maybe it''s un-escaping the characters too many times, or
not enough times.


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Andrew Roth wrote:
> Can you maybe boil it down to a smaller example? 
Yes; I was kind of desperate and I just threw the whole stuff :D

I have to write this code, for a Javscript function:
onmouseover="coolTip(''<a 
href=\''/wiki/show_appears?value=Fidel+Castro&name=primaryCharacter\''>Appears...</a>'',
STICKY,MOUSEOFF);"

If I write this in a text area, as it is, and then I render the page, 
everything is ok. However, this whoole string will be given as a 
variable in my app. So I tried with this:
semantic_link = ''onmouseover="coolTip(\''<a 
href=\\\''/wiki/show_appears?value=Fidel+Castro&name=primaryCharacter\\\''
>Appears...</a>\'', STICKY,
MOUSEOFF);"''

The problem is in the a href=\\\''/wiki/ ...
If i put 2 backslashes (to return a backslash), and another one to 
return the '',
what rails render is a dot. I ve tried with other combinations but... 
they didn''t work! How can I do it?


-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

If I hardcode the anchor tag in my rhtml file as follows it works fine
for me. I did have to dispense with the \\ though. However, I get the
impression you were not hardcoding this in your view. If your still
having trouble with it, post your controller and view code.

<a href="javascript: void(0);" class="defns"
onmouseover="coolTip(''&lt;a
href=\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\''
&gt;Appears...&lt;/a&gt;'',STICKY, MOUSEOFF);"
onmouseout="nd();">Hello</a>

-Paul


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Paul Corcoran wrote:
> If I hardcode the anchor tag in my rhtml file as follows it works fine
> for me. I did have to dispense with the \\ though. However, I get the
> impression you were not hardcoding this in your view. If your still
> having trouble with it, post your controller and view code.
> 
> <a href="javascript: void(0);" class="defns"
> onmouseover="coolTip(''&lt;a
>
href=\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\''
> &gt;Appears...&lt;/a&gt;'',STICKY, MOUSEOFF);"
> onmouseout="nd();">Hello</a>
> 
> -Paul
This anchor tag also works for me if I write it as it is in a rhtml 
file. But I have to generate it from the application. So I have to write 
the anchor inside a string (cause the link /wiki/show... will change 
depending on several things). My problem is having the anchor tag inside 
a string variable in rails.

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Ok, I understand you need to change it programmatically. I added the \\
back in, put it in a string assigned to an instance variable and did a
simple render in the view. It seems to work just fine for me. Here is
the string in my controller:

 @testvar = ''<a href="javascript: void(0);"
class="defns"
onmouseover="coolTip(\''&lt;a
href=\\\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\\\''
&gt;Appears...&lt;/a&gt;\'',STICKY, MOUSEOFF);"
onmouseout="nd();">Hello</a>''

Here is the rhtml code:

<%= @testvar %>

And here is the html as it appears in the browser when I do view
source:

<a href="javascript: void(0);" class="defns"
onmouseover="coolTip(''&lt;a
href=\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\''
&gt;Appears...&lt;/a&gt;'',STICKY, MOUSEOFF);"
onmouseout="nd();">Hello</a>

By the way I am using Firefox 1.0.5.9 and IE 6.

-Paul


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Paul Corcoran wrote:
> Ok, I understand you need to change it programmatically. I added the \\
> back in, put it in a string assigned to an instance variable and did a
> simple render in the view. It seems to work just fine for me. Here is
> the string in my controller:
> 
>  @testvar = ''<a href="javascript: void(0);"
class="defns"
> onmouseover="coolTip(\''&lt;a
>
href=\\\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\\\''
> &gt;Appears...&lt;/a&gt;\'',STICKY, MOUSEOFF);"
> onmouseout="nd();">Hello</a>''
> 
> Here is the rhtml code:
> 
> <%= @testvar %>
> 
> And here is the html as it appears in the browser when I do view
> source:
> 
> <a href="javascript: void(0);" class="defns"
> onmouseover="coolTip(''&lt;a
>
href=\''/wiki/show_appears?value=Fidel+Castro&amp;name=primaryCharacter\''
> &gt;Appears...&lt;/a&gt;'',STICKY, MOUSEOFF);"
> onmouseout="nd();">Hello</a>
> 
> By the way I am using Firefox 1.0.5.9 and IE 6.
> 
> -Paul

No, sorry :( It does not work for me. The three backslashes turned into 
a dot.
Dunno why :( I''m not using RedCloth at all, I just throw the variable
as
you in the rhtml. Can it be the Rails version? I''m using rails 1.1.4 :(

Thanks a lot



-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

I''m narrowing the error...

I have test the variable
var = ''\\\''''

and when this var is rendered in an rhtml, it works fine, as you''ve
told
me. The render symbols are \''

Buuuuut, what i have to do is programatically substitute a pattern for 
the link tag. So when I do:

semantic_body.gsub!(''test'',var)... this does not work!! It
adds a dot.

Why this behaviour????


(in fact, it not only returns a dot, but the following paragrpahs are 
mixed in a mess..living the dot a paragraph away instead!! dunno)

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

I was using rails v1.1.2 but I just upgraded to v1.1.6 and it still
works fine for me. I am using Ruby v1.8.4 on a Windows XP box. I guess
at this point I would check the development.log to see if there is
something in there that might give you a clue. I suppose it''s also
possible a plug-in might be causing the problem Otherwise, I think your
only recourse is to rebuild the environment by installing a clean
version of ruby on rails. Don''t install any plug-ins and give it
another shot.

-Paul

PS:<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1" />


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Damaris - if you can post an example of working code that fails I think
we can figure this out. Show me a real code fragment, something I can
recreate on my end.

Thanks,
Paul


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Ok, instead of giving my rails stuff code, try this in a simple Ruby 
file:

var = ''\\\''''
varTest1 = ''hola''
print "ARG" + var
print "ERG" + varTest1.gsub!(''hola'', var)

The two "prints" should return the same, should''n they? But
they don''t
:(
The first "print" returns my so lovely \'' but the second
returns
nothing.

Could you please try if you obtain the same results? Cause if I have to 
uninstall everything... pfff, I''m gonna die :(((

(I have ruby version 1.8.2)

Thanks for your help, really :(



-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

It seems we need to add another set of double backslashes to get the
desired results. I don''t understand this as the documentation says that
on a single quoted string that a double backslash converts to a single
backslash.

puts "ERG" + varTest1.gsub!(''hola'',
''\\\\\'''') --> ERG\''

-Paul


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Paul Corcoran wrote:
> It seems we need to add another set of double backslashes to get the
> desired results. I don''t understand this as the documentation says
that
> on a single quoted string that a double backslash converts to a single
> backslash.
> 
> puts "ERG" + varTest1.gsub!(''hola'',
''\\\\\'''') --> ERG\''
> 
> -Paul
Wow!! It works!! You''ve saved my life!!!!!!!!!!!!!!!!!!!!
Thank you really much.

I don''t understand either, cause all works fine according to the 
documentation but the "gsub" function.

Thanks again, thanks for your help, and patience.

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Glad to see it fixed the problem. I''ve added this to my growing list of
gotcha''s. :)


--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Damaris Fuentes wrote:
> Paul Corcoran wrote:
>> It seems we need to add another set of double backslashes to get the
>> desired results. I don''t understand this as the documentation
says that
>> on a single quoted string that a double backslash converts to a single
>> backslash.
>> 
>> puts "ERG" + varTest1.gsub!(''hola'',
''\\\\\'''') --> ERG\''
>> 
>> -Paul
> 
> Wow!! It works!! You''ve saved my life!!!!!!!!!!!!!!!!!!!!
> Thank you really much.
> 
> I don''t understand either, cause all works fine according to the 
> documentation but the "gsub" function.
> 
> Thanks again, thanks for your help, and patience.
Its because the string is going to the regexp replacement engine.
If you do:

  a = ''\\1''
  # that gives you a slash and a 1 in a string. however:
  b = ''blah''
  b.gsub! /(l)a/, a
  b
  # => ''blh'', no slash 1 in sight.

Thats because \[0-9] is used for the back-references.
A (probably slower) solution, is to avoid this by using the block 
approach:

  b.gsub!(/(l)a/) { a }
  # => "b\\1h"

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---