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https://issues.apache.org/jira/browse/TAP5-1733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13444003#comment-13444003
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Steve Eynon commented on TAP5-1733:
-----------------------------------
Fixes to convert malformed URLs in T5.3.4 into a specific MalformedUrlException
is given here:
How to return HTTP 404 for in-exact URL requests
http://tapestry.1045711.n5.nabble.com/How-to-return-HTTP-404-for-in-exact-URL-requests-td5715875.html
> Throw bespoke exceptions so they may be more easily identified by Error
> Handlers
> --------------------------------------------------------------------------------
>
> Key: TAP5-1733
> URL: https://issues.apache.org/jira/browse/TAP5-1733
> Project: Tapestry 5
> Issue Type: Improvement
> Components: tapestry-core
> Affects Versions: 5.3
> Reporter: Steve Eynon
> Priority: Minor
> Labels: exception-handling
>
> Two exceptions in particular tend to be thrown prolifically by live sites
> when they are crawled by robots. They are:
> - java.lang.RuntimeException: Forms require that the request method be POST
> and that the t:formdata query parameter have values.
> - java.lang.IllegalArgumentException: Input string 'XXX' is not valid; the
> character 'X' at position X is not valid.
> To save needless reporting of benign errors (and to prevent the error logs
> from filling up) these exceptions are usually ignored by implementing Error
> Handlers. But the ErrorHandler has to currently check the exception message:
> if (e.getMessage().contains("Forms require that the request method be POST"))
> {
> doIgnore();
> }
> which is both brittle and nasty. Instead it'd be great if Tapestry could
> throw some bespoke exceptions so the above could be re-written as:
> if (e instanceof FormsRequirePostException) {
> doIngore();
> }
> Email thread below:
> http://tapestry.1045711.n5.nabble.com/Safari-for-example-browser-history-and-form-exception-td4942074.html
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