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From "Daniel Rabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1085) Connection is never reused if response is gzip with non-negative Content-Length
Date Thu, 12 May 2011 17:17:47 GMT
Connection is never reused if response is gzip with non-negative Content-Length

                 Key: HTTPCLIENT-1085
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1085
             Project: HttpComponents HttpClient
          Issue Type: Improvement
          Components: HttpClient
    Affects Versions: 4.1.1
            Reporter: Daniel Rabe
            Priority: Minor

While debugging a separate issue, I noticed that DefaultConnectionReuseStrategy is very sensitive
to whether the server returns a positive content-length or content-length=-1 with chunked
encoding. In particular, I saw two cases:
(1) Server returns gzip response with Content-Length=-1, chunked encoding. The connection
is reused.
(2) Server returns gzip response with Content-Length=<actual-number-of-bytes-in-response>
The connection is NOT reused.

This is because of the following code in DefaultConnectionReuseStrategy:

           if (entity.getContentLength() < 0) {
                if (!entity.isChunked() ||
                    ver.lessEquals(HttpVersion.HTTP_1_0)) {
                    // if the content length is not known and is not chunk
                    // encoded, the connection cannot be reused
                    return false;

GzipDecompressingEntity implements its getContentLength as always returning -1. However, it
is not chunked. Therefore, the connection is not reused.

I'm not sure if you would consider this a bug or a request for enhancement, but it seems to
me that if the server is returning an accurate content-length, the client should be able to
consume that number of bytes, then reuse the connection.

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