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https://issues.apache.org/jira/browse/HTTPCLIENT-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16756264#comment-16756264
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Jay Modi commented on HTTPCLIENT-1968:
--------------------------------------
I think encoded slashes should be preserved based on [RFC
3986|https://tools.ietf.org/html/rfc3986]. The forward slash is a reserved
character so [section 2.4|https://tools.ietf.org/html/rfc3986#section-2.4]
applies from the RFC:
{quote}When a URI is dereferenced, the components and subcomponents significant
to the scheme-specific dereferencing process (if any) must be parsed and
separated before the percent-encoded octets within those components can be
safely decoded, as otherwise the data may be mistaken for component delimiters.
The only exception is for percent-encoded octets corresponding to characters in
the unreserved set, which can be decoded at any time.
{quote}
Given this, I think that the httpclient should not change the encoded slash
when it is doing path normalization. I'd expect that if I pass a URI to the
httpclient that it does not change the URI in a manner that results in a
different path.
> Encoded forward slashes are not preserved when rewriting URI
> ------------------------------------------------------------
>
> Key: HTTPCLIENT-1968
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1968
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Affects Versions: 4.5.7
> Reporter: Jay Modi
> Priority: Major
> Attachments: rewrite_preserve_forward_slash.diff
>
>
> URIs that contain an encoded forward slash (%2F) are no longer preserved when
> the HTTP client executes. I came across this when upgrading from 4.5.2 to
> 4.5.7 and my requests that contained an encoded forward slash suddenly
> started failing. The appears to be due to decoding and re-encoding of the
> path that takes place in the URIUtils#rewriteURI method. I've attached a
> patch that restores the old behavior but if a URI contains two slashes in a
> row in addition to an encoded slash the encoded forward slash will be decoded.
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