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https://issues.apache.org/jira/browse/HTTPCLIENT-1995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17153501#comment-17153501
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Michael Osipov edited comment on HTTPCLIENT-1995 at 7/8/20, 10:55 AM:
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[~olegk], It'd be nice if you could drop some words here since a lot of
information has been provided by some authoritative people.
was (Author: michael-o):
[~olegk], I'd be nice if you could drop some words here since a lot of
information has been provided by some authoritative people.
> Percent-encoded ampersand in URI path not preserved
> ---------------------------------------------------
>
> Key: HTTPCLIENT-1995
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1995
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 4.5.8, 4.5.9
> Environment: Linux Mint 19, OpenJDK 8
> Reporter: none_
> Priority: Major
>
> Starting with HttpClient 4.5.8, percent-encoded ampersand characters in URI
> path segments are not preserved any longer but written in decoded form to
> wire due to path normalization performed by URIUtils.rewriteURI(URI,
> HttpHost).
>
> According to RFC 3986 (page 11+), the ampersand character is a delimiter and
> thus needs to be percent-encoded when not used for this purpose. Path
> normalization, as performed by HttpClient v4.5.8+, creates a new URI that is
> not equivalent to the original URI and thus leads to misinterpretation on
> server/receiver side.
> ??URIs that differ in the replacement of a reserved character with its??
> ??corresponding percent-encoded octet are not equivalent. Percent-??
> ??encoding a reserved character, or decoding a percent-encoded octet??
> ??that corresponds to a reserved character, will change how the URI is??
> ??interpreted by most applications??.
>
> A very simple test case is as follows:
> {code:java}
> @Test
> public void testAmpersand() throws Throwable
> {
> final URI uri = new
> URI("http://example.org/some/path%26with%20percent/encoded/segments";);
> final URI uri2 = URIUtils.rewriteURI(uri, null);
>
> Assert.assertEquals(uri, uri2);
> }
> {code}
>
>
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