Backport #4098: URI.decode_www_form hangs for some input strings

• Status: Closed
• Assignee: yugui (Yuki Sonoda)

[iconara (Theo Hultberg)]

=begin
Running

require 'uri'
URI.decode_www_form('a=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA&b')

will hang seemingly forever. If you decrease the number of A's you will eventually see that it just takes a very, very long time to realize that the string is a malformed query string (there's no = in the last parameter). The culprit is line 828 of uri/common.rb, which looks like this:

unless /\A#{WFKV_}=#{WFKV_}(?:[;&]#{WFKV_}=#{WFKV_})*\z/o =~ str

I haven't even tried to decode that regexp, but it's clear that with a string like the one above it will take a very long time to realize that it can't match.
=end

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

=begin
This issue was solved with changeset r29976.
Theo, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end

[nobu (Nobuyoshi Nakada)]

• Category set to lib
• Status changed from Closed to Assigned
• Assignee set to yugui (Yuki Sonoda)

=begin

=end

[yugui (Yuki Sonoda)]

• Status changed from Assigned to Closed

=begin
This issue was solved with changeset r30306.
Theo, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end