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From "Shankar Unni (JIRA)" <axis-...@ws.apache.org>
Subject [jira] Updated: (AXIS-2025) Illegal XML characters in String arguments and return values cause XML exceptions in Axis calls
Date Tue, 31 May 2005 22:11:05 GMT
     [ http://issues.apache.org/jira/browse/AXIS-2025?page=all ]

Shankar Unni updated AXIS-2025:
-------------------------------

    Attachment: Axis1.2echoAPI.log

Client-side exception for "String echo(String msg)" API. No server-side error logged. Notice
that this one didn't even make it over to the server side - the exception was thrown during
the encoding itself.

No tcpmon output (because no call made).


> Illegal XML characters in String arguments and return values cause XML exceptions in
Axis calls
> -----------------------------------------------------------------------------------------------
>
>          Key: AXIS-2025
>          URL: http://issues.apache.org/jira/browse/AXIS-2025
>      Project: Axis
>         Type: Bug
>   Components: Serialization/Deserialization
>     Versions: 1.2
>  Environment: All (but reproduced on WinXP).
> Axis 1.1 and 1.2
>     Reporter: Shankar Unni
>  Attachments: Axis1.1badmsgAPI.log, Axis1.1echoAPI.log, Axis1.2badmsgAPI.log, Axis1.2echoAPI.log
>
> Arguments and return values of Java type String are incorrectly handled if they contain
non-printing illegal ASCII characters.
> Example 1: bad return values:
> - - - - - - - - - - - - - - -
> E.g. the string 
>   "bad char: " + (char)3 + "."
> Trivial example:
> foo.jws:
>   public class foo {
>     public String badmsg()
>     {
>       return "bad: " + (char)3 + ".";
>     }
>   }
> When calling this method and the server is running on Axis 1.1, it returns XML with the
illegal character ASCII "3" in the text:
>    <badmsgReturn xsi:type="xsd:string">bad: .</badmsgReturn>  
> This causes an XML parse exception on the client side ("org.xml.sax.SAXParseException:
An invalid XML character (Unicode: 0x3) was found in the element content of the document.")
> With Axis 1.2, the server doesn't even return a valid response: I get an HTTP 200 OK
with an empty content, causing a different XML parse error.
> Example 2: bad parameter values:
> - - - - - - - - - - - - - - - -
> A similar problem exists when passing such a string from the the client side.
> If I have a method in foo.jws:
>   public class foo {
>     public String echo(String s)
>     {
>       return s;
>     }
>   }
> Then if I write an ordinary Java client to call this, and pass it a bad string as in
the beginning of this post, I get an exception thrown while the call is being composed:
> java.lang.IllegalArgumentException: The char '0x3' in 'bad char: ?.' is not a valid XML
character.
> This is somewhat absurd: shouldn't the serialization layer be encoding these illegal
XML characters as entity escapes? They're entirely legal in the current locale (US), and normal
Java code handles this character quite normally.  Why should it croak when passed by XML/RPC?

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