To pass variable names and
content to the server, you might do something like this:
<go href="/cgi-bin/somescript?name=$(name)&age=$(age)"/>
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If the user inputs a name string that
contains special characters such as a spaces or apostrophes, it will result in an illegal
URL. If the user typed "Espen Lyngaas" and I'm 32 years old, the URL would be:
/cgi-bin/somescript?name="Espen Lyngaas"&age=I'm 32 years old
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The server that receives this URL is
unlikely to accept that. The solution to the problem is to enable so called character
escaping when the variable is replaced. The general syntax is $ (variablename:escaopemode)
where variablename is the name of the variable and escapemode is noesc which means
do not escape or unescape the variable, escape which means that the variable should be
escaped, and unescape which means that the variable should be converted from an escaped
format to a normal format. The following will solve the above problem:
<go href="/cgi-bin/somescript?name=$(name:escape)&age=$(age:escape)"/>
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This will produce an URL like this:
/cgi-bin/somescript?name=%22Espen+Lyngaas%22&age=I%27m+32+years+old
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Escaping can be used wherever variable
replacement is used in the WML code, for instance <setvar name ="var1"
value="$(myname:escape)">. |
