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https://issues.apache.org/jira/browse/HTTPCORE-778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17934319#comment-17934319
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Oleg Kalnichevski commented on HTTPCORE-778:
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> However, there are cases which require some of those characters to not be
> encoded (OAuth's 'fragment' response type, for example, but there are more).
[~peterhalicky] In those case request consumers fail to conform to the section
6 of RFC 3986 (Normalization and Comparison). You should take the problem up
with the developers / maintainers of those systems
> However, older version of httpclient (4.x) uses URIC set of safe characters
> (i.e. non-encoded), which makes it a regression.
No, it is not. Versions of HttpClient older than 5.1 conform to RFC RFC2396 not
RFC 3986.
> URIBuilder is taking the choice away and just encodes everything.
You are welcome to change this ticket to a feature request. Otherwise I will
have to close it as INVALID.
Oleg
> URIBuilder uses incorrect encoding method for URI fragment
> ----------------------------------------------------------
>
> Key: HTTPCORE-778
> URL: https://issues.apache.org/jira/browse/HTTPCORE-778
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore
> Affects Versions: 5.3.3
> Reporter: Peter Halicky
> Priority: Major
>
> URI fragment is encoded in URIBuilder using:
> {code:java}
> PercentCodec.encode(sb, this.fragment, this.charset); {code}
> (line 401, end of buildString method)
> This encodes all characters except UNRESERVED using the percent-format.
> As per (obsoleted) RFC2396, URI fragment should use URIC safe-chars.
> As per RFC3986, quite a bit more characters should not be encoded:
> {code:java}
> pct-encoded = "%" HEXDIG HEXDIG
> unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
> sub-delims = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / "," / ";" /
> "="
> pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
> fragment = *( pchar / "/" / "?" ) {code}
> Note that URIBuilder in httpclient 4.5.13 conforms to at least the old
> RFC2396, as it uses URIC set of safe characters (i.e. this is in fact a
> regression).
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