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https://issues.apache.org/jira/browse/HTTPCLIENT-1982?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCLIENT-1982.
-------------------------------------------
    Resolution: Invalid

'=' character is not reserved. Please see section A. Collected BNF of RFC 2396.

https://www.rfc-editor.org/rfc/rfc2396.txt

{noformat}
      path_segments = segment *( "/" segment )
      segment       = *pchar *( ";" param )
      param         = *pchar
      pchar         = unreserved | escaped |
                      ":" | "@" | "&" | "=" | "+" | "$" | ","
{noformat}

Oleg

> Encoded equals(=) are not preservered
> -------------------------------------
>
>                 Key: HTTPCLIENT-1982
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1982
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>    Affects Versions: 4.5.8
>            Reporter: Anton Pozhidaev
>            Priority: Major
>
> This issue is very similar to HTTPCLIENT-1968. 
> But instead of encoded slash, it affects encoded equals (%3D). 
> Encoded equals are decoded back in URL ( "%3D" => "=") *only if normalization 
> is set to true*. 
> However, I believe this is shouldn't be part of normalization.
> The issue is happening somewhere inside URIBuilder.setPathSegments() which is 
> called from 
> `rewriteURI(URI uri, HttpHost target, EnumSet<URIUtils.UriFlag> flags)` line 
> 103
> PS. If the issue will be acknowledged as valid one I can try to prepare PR :) 



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