Gerard Bouchar created NUTCH-2554:
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Summary: parsechecker can't fetch some URLs
Key: NUTCH-2554
URL: https://issues.apache.org/jira/browse/NUTCH-2554
Project: Nutch
Issue Type: Bug
Reporter: Gerard Bouchar
The parserchecker (org.apache.nutch.parse.ParserChecker) calls
_URLUtil.toASCII_ on the url it is given, reencoding already percent-encoded
URLs.
For instance, let's say we want to query _http://example.com_, passing a GET
parameter with name 'q' and value '/'. '/' is a special character, and thus has
to be encoded before being sent.
If we pass '[_http://example.com/?q=/_'|http://example.com/?q=/%27] to the
parserchecker, then it doesn't encode the '/', and tries to fetch the URL as
is, which is invalid.
If we try to encode the parameter beforehand, and call the parsechecker with
'http://example.com/?q=%2F', then it encodes the '%' sign to '%25', and thus
fetches '[http://example.com/?q=%252F'.|http://example.com/?q=%252F%27.]
This actually makes it impossible to fetch the correct URL
(http://example.com/?q=%2F) from the parsechecker.
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