From a32251487174dffe420980fbc9d43bcf4472d2af Mon Sep 17 00:00:00 2001
From: Jamis Buck <jamis@37signals.com>
Date: Thu, 1 Sep 2005 14:45:10 +0000
Subject: [PATCH] Preserve underscores when unquoting message bodies #1930

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2089 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 actionmailer/CHANGELOG                          |  2 ++
 .../lib/action_mailer/vendor/tmail/quoting.rb   | 11 ++++++-----
 actionmailer/test/mail_service_test.rb          | 10 ++++++++++
 actionmailer/test/tmail_test.rb                 | 17 +++++++++++++++++
 4 files changed, 35 insertions(+), 5 deletions(-)
 create mode 100644 actionmailer/test/tmail_test.rb

diff --git a/actionmailer/CHANGELOG b/actionmailer/CHANGELOG
index 1fe104dcba..1d4118ebff 100644
--- a/actionmailer/CHANGELOG
+++ b/actionmailer/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Preserve underscores when unquoting message bodies #1930
+
 * Encode multibyte characters correctly #1894
 
 * Multipart messages specify a MIME-Version header automatically #2003 [John Long]
diff --git a/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb b/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
index b593efafcd..36bf03f0a3 100644
--- a/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
+++ b/actionmailer/lib/action_mailer/vendor/tmail/quoting.rb
@@ -9,7 +9,7 @@ def unquoted_body(to_charset = 'utf-8')
       case (content_transfer_encoding || "7bit").downcase
         when "quoted-printable"
           Unquoter.unquote_quoted_printable_and_convert_to(quoted_body,
-            to_charset, from_charset)
+            to_charset, from_charset, true)
         when "base64"
           Unquoter.unquote_base64_and_convert_to(quoted_body, to_charset,
             from_charset)
@@ -47,7 +47,7 @@ def body(to_charset = 'utf-8', &block)
 
   class Unquoter
     class << self
-      def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1")
+      def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1", preserve_underscores=false)
         return "" if text.nil?
         if text =~ /^=\?(.*?)\?(.)\?(.*)\?=$/
           from_charset = $1
@@ -55,7 +55,7 @@ def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1")
           text = $3
           case quoting_method.upcase
             when "Q" then
-              unquote_quoted_printable_and_convert_to(text, to_charset, from_charset)
+              unquote_quoted_printable_and_convert_to(text, to_charset, from_charset, preserve_underscores)
             when "B" then
               unquote_base64_and_convert_to(text, to_charset, from_charset)
             else
@@ -66,8 +66,9 @@ def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1")
         end
       end
  
-      def unquote_quoted_printable_and_convert_to(text, to, from)
-        convert_to(text.gsub(/_/," ").unpack("M*").first, to, from)
+      def unquote_quoted_printable_and_convert_to(text, to, from, preserve_underscores=false)
+        text = text.gsub(/_/, " ") unless preserve_underscores
+        convert_to(text.unpack("M*").first, to, from)
       end
  
       def unquote_base64_and_convert_to(text, to, from)
diff --git a/actionmailer/test/mail_service_test.rb b/actionmailer/test/mail_service_test.rb
index 50eb1984b5..c181b14f9a 100755
--- a/actionmailer/test/mail_service_test.rb
+++ b/actionmailer/test/mail_service_test.rb
@@ -145,6 +145,11 @@ def html_mail(recipient)
     content_type "text/html"
   end
 
+  def html_mail_with_underscores(recipient)
+    subject      "html mail with underscores"
+    body         %{<a href="http://google.com" target="_blank">_Google</a>}
+  end
+
   def custom_template(recipient)
     recipients recipient
     subject    "[Signed up] Welcome #{recipient}"
@@ -631,6 +636,11 @@ def test_html_mail
     assert_equal "text/html", mail.content_type
   end
 
+  def test_html_mail_with_underscores
+    mail = TestMailer.create_html_mail_with_underscores(@recipient)
+    assert_equal %{<a href="http://google.com" target="_blank">_Google</a>}, mail.body
+  end
+
   def test_various_newlines
     mail = TestMailer.create_various_newlines(@recipient)
     assert_equal("line #1\nline #2\nline #3\nline #4\n\n" +
diff --git a/actionmailer/test/tmail_test.rb b/actionmailer/test/tmail_test.rb
new file mode 100644
index 0000000000..3930c7d39a
--- /dev/null
+++ b/actionmailer/test/tmail_test.rb
@@ -0,0 +1,17 @@
+$:.unshift(File.dirname(__FILE__) + "/../lib/")
+$:.unshift File.dirname(__FILE__) + "/fixtures/helpers"
+
+require 'test/unit'
+require 'action_mailer'
+
+class TMailMailTest < Test::Unit::TestCase
+  def test_body
+    m = TMail::Mail.new
+    expected = 'something_with_underscores'
+    m.encoding = 'quoted-printable'
+    quoted_body = [expected].pack('*M')
+    m.body = quoted_body
+    assert_equal "something_with_underscores=\n", m.quoted_body
+    assert_equal expected, m.body
+  end
+end
-- 
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