[sup-devel] pass //IGNORE to iconv

From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: sup-devel <sup-devel@rubyforge.org>
Subject: [sup-devel] pass //IGNORE to iconv
Date: Tue, 09 Nov 2010 12:27:06 -0300	[thread overview]
Message-ID: <1289316270-sup-7500@alvh.no-ip.org> (raw)

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With the current code, an encoding failure means we see (and quote)
stuff like \xab\xbc\x07 in the text.  Using the //IGNORE flag allows the
code to ignore broken chars instead of displaying large amounts of junk.

I note that the text containing broken chars is coming from external
sources, so there's nothing that could be done locally to fix it.

-- 
Álvaro Herrera <alvherre@alvh.no-ip.org>

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From 9f604264731745b30927ac6822739d94a3e4e492 Mon Sep 17 00:00:00 2001
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: Tue, 9 Nov 2010 12:13:47 -0300
Subject: [PATCH 3/3] Make encoding conversion pass //IGNORE to iconv

This makes transcoding failure a bit more user-friendly by discarding
broken chars and displaying what can be successfully transcoded, instead
of punting and displaying the ASCII representation.

This is particularly useful when corporate email systems append a
disclaimer that's encoded in a different encoding than whatever the user
has set up in the MUA; or when broken remote MUAs fail to re-encode the
quoted part when they reply in a different encoding.
---
 lib/sup/util.rb |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/sup/util.rb b/lib/sup/util.rb
index 4a0e4e7..8b9c6a5 100644
--- a/lib/sup/util.rb
+++ b/lib/sup/util.rb
@@ -712,9 +712,9 @@ class Iconv
     end
 
     begin
-      returning(Iconv.iconv(target, charset, text + " ").join[0 .. -2]) { |str| str.check }
+      returning(Iconv.iconv(target + "//IGNORE", charset, text + " ").join[0 .. -2]) { |str| str.check }
     rescue Errno::EINVAL, Iconv::InvalidEncoding, Iconv::InvalidCharacter, Iconv::IllegalSequence, String::CheckError
-      debug "couldn't transcode text from #{orig_charset} (#{charset}) to #{target}) (#{text[0 ... 20].inspect}...) (got #{$!.message} (#{$!.class}))"
+      debug "couldn't transcode text from #{orig_charset} (#{charset}) to #{target} (#{text[0 ... 20].inspect}...): got #{$!.class} (#{$!.message})"
       text.ascii
     end
   end
-- 
1.7.1


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