ValidatorTool javascript generator can generate invalid Javascript
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Key: VELTOOLS-52
URL: http://issues.apache.org/jira/browse/VELTOOLS-52
Project: VelocityTools
Type: Bug
Components: VelocityStruts
Versions: 1.2
Environment: Using JDK1.4.2 / Linux 2.4 kernel / Tomcat 4.1
Reporter: Christopher Schultz
Assigned to: Nathan Bubna
Fix For: 1.2
ValidatorTool can create invalid javascript in a few situations.
Here is an example of such a situation and also an example of the invalid
javascript it generates.
Suppose you have the following dynamic action form validation rules defined
(this is actually text field which is intended to be used as an "other" input
when a drop-down has the value of "Other").
<pre>
<field property="selectOther"
depends="validwhen,maxlength"
page="1">
<arg0 key="prompt.selectOther"/>
<arg1 name="maxlength" key="${var:maxlength}" resource="false" />
<var><var-name>maxlength</var-name><var-value>255</var-value></var>
<var>
<var-name>test</var-name>
<var-value>
(((select == "Other") and (*this* != null)) or
(select != "Other"))
</var-value>
</var>
</field>
</pre>
When ValidatorTool generates Javascript for this, you get the following:
<pre>
.
.
.
this.a3 = new Array("orgTypeOther", "The field Organization Type cannot be
greater than 255 characters.", new Function ("varName", "this.maxlength='255';
this.test='(((orgType == "Other") and (*this* != null)) or
(orgType != "Other"))'; return this[varName];"));
.
.
.
</pre>
Note that there is a newline in the string literal (invalid) and that the
double-quotes used in my "validwhen" rule have not been escaped, which
prematurely ends the double-quoted string starting with
<code>"this.maxlength</code>, which really confuses the Javascript interpreter.
It turns out that switching from double-quotes to single-quotes doesn't help,
since there are also single-quoted strings within that double-quoted string, so
basically it won't work no matter what you do (since backslash-escaping the
quotes will cause the validwhen test itself to become invalid.
I see two solutions: properly escape the variable values being dumped into
Javascript, or avoid adding the "test" variable to the Javascript, since it
will be ignored, anyway.
I propose fixing the escaping, since there may be other validator "var" values
with this same problem.
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