Issue #4551 has been updated by naruse.

Description updated
Status changed from Open to Assigned
Assignee set to naruse


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Feature #4551: uri.set_scheme should downcase schemes
https://bugs.ruby-lang.org/issues/4551#change-24911

Author: drbrain
Status: Assigned
Priority: Normal
Assignee: naruse
Category: lib
Target version: 


=begin
From RFC 2396 section 3.1:

"For resiliency, programs interpreting URI should treat upper case letters as equivalent to lower case in scheme names (e.g., allow 'HTTP' as well as 'http')."

Currently programs using URI for HTTP vs HTTPS protocol check which protocol to use with a comparison like:

 http.use_ssl = uri.scheme == 'https'

Since URI does not modify the input scheme this makes the check fragile.  For example:

 URI.parse('httpS://example').scheme # => "httpS"

Since RFC 2396 allows uppercase letters to be treated like lowercase I think #set_scheme should downcase its value.
=end



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