Details
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Improvement
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Status: Closed
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Minor
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Resolution: Implemented
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5.3
Description
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:
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