Uwe Schindler created SOLR-4283:
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Summary: Improve URL decoding (followup of SOLR-4265)
Key: SOLR-4283
URL: https://issues.apache.org/jira/browse/SOLR-4283
Project: Solr
Issue Type: Improvement
Affects Versions: 4.0
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Fix For: 4.1, 5.0
Attachments: SOLR-4283.patch
Followup of SOLR-4265:
SOLR-4265 has 2 problems:
- it reads the whole InputStream into a String and this one can be big. This
wastes memory, especially when your query string from the POSted form data is
near the 2 Megabyte limit. The String is then packed in splitted form into a
big Map.
- it does not report corrupt UTF-8
The attached patch will do 2 things:
- The decoding of the POSTed form data is done on the ServletInputStream,
directly parsing the bytes (not chars). Key/Value pairs are extracted and
%-decoded to byte[] on the fly. URL-parameters from getQueryString() are parsed
with the same code using ByteArrayInputStream on the original String,
interpreted as UTF-8 (this is a hack, because Servlet API does not give back
the original bytes from the HTTP request). To be standards conform, the query
String should be interpreted as US-ASCII, but with this approach, not full
escaped UTF-8 from the HTTP request survive.
- the byte[] key/value pairs are converted to Strings using CharsetDecoder
This will be memory efficient and will report incorrect escaped form data, so
people will no longer complain if searches hit no results or similar.
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