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Re: Java code to output escaped Javascript?

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From	"laredotornado@zipmail.com" <laredotornado@gmail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Java code to output escaped Javascript?
Date	Wed, 1 Jun 2011 09:58:41 -0700 (PDT)
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On Jun 1, 9:50 am, Joshua Cranmer <Pidgeo...@verizon.invalid> wrote:
> On 06/01/2011 09:11 AM, laredotornado wrote:
>
> > Hi,
>
> > I'm using Java 6.  I want to output code for a Javascript variable ...
>
> >                    String jsValue = escapeForJS(value);
> >                    String expression = "storedVars['myVar'] = \"" + jsValue + "\";";
>
> > Is there anything standard that will do this?  I came up with my own
> > function, but I don't want to worry about leaving anything out.
>
> Any Java->JSON library worth its salt should be able to do this.
>
> >    /* creates a JS expression that can be used within quotes. */
> >    private String escapeForJS(String value) {
> >            value = value.replace("\n", "\\n");
> >            value = value.replace("\r", "\\r");
> >            value = value.replace("\"", "\\\"");
> >            return value;
> >    }
>
> You also forgot `\' as well as every character in the range
> '\u0000'-'\u001f' and '\u007f-\uffff' [if you have to worry about
> non-BMP characters, keep in mind that JS is like Java in that it has the
> same UCS-2/UTF-16 hairyness].
>
> --
> Beware of bugs in the above code; I have only proved it correct, not
> tried it. -- Donald E. Knuth

Yeah, you hit on exactly what I was talking -- a bunch of characters
that it is not practical to hard-code for.  I'm not outputting JSON
objects, so is the Java -> JSON route you suggest still the way to go?
- Dave

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Thread

Java code to output escaped Javascript? laredotornado <laredotornado@zipmail.com> - 2011-06-01 06:11 -0700
  Re: Java code to output escaped Javascript? Travers Naran <tnaran@gmail.com> - 2011-06-01 07:47 -0700
  Re: Java code to output escaped Javascript? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-06-01 10:50 -0400
    Re: Java code to output escaped Javascript? "laredotornado@zipmail.com" <laredotornado@gmail.com> - 2011-06-01 09:58 -0700
    Re: Java code to output escaped Javascript? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-06-02 10:17 +1200
      Re: Java code to output escaped Javascript? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-06-01 21:47 -0400

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