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43 lines
1.8 KiB
43 lines
1.8 KiB
6 years ago
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commit 4e1de20b61ae3227d9fc973193a60cf7997e8606
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Author: Michal Domonkos <mdomonko@redhat.com>
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Date: Fri Feb 19 11:05:23 2016 +0100
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yum-cron: don't crash with non-ascii email. BZ 1202680
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Previously, we constructed our MIMEText object with the default us-ascii
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charset, which caused it to encode the unicode string (self.output) with
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the us-ascii codec. This worked fine as long as the string contained
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ascii-only chars. However, if yum-cron was run with a language which
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makes use of non-ascii chars, this would fail and MIMEText would crash.
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To fix that, we need to tell MIMEText to encode the message with utf-8
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instead. However, that also causes the message to be transfer-encoded
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to base64 which is heavier and uglier, so let's limit that to non-ascii
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email only.
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diff --git a/yum-cron/yum-cron.py b/yum-cron/yum-cron.py
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index 039f537..ccba690 100755
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--- a/yum-cron/yum-cron.py
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+++ b/yum-cron/yum-cron.py
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@@ -223,8 +223,18 @@ class EmailEmitter(UpdateEmitter):
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# Don't send empty emails
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if not self.output:
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return
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- # Build up the email to be sent
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- msg = MIMEText(''.join(self.output))
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+ # Build up the email to be sent. Encode it with us-ascii instead of
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+ # utf-8 if possible. This ensures the email package will not
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+ # transfer-encode it to base64 in such a case (it decides based on the
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+ # charset passed to the MIMEText constructor).
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+ output = ''.join(self.output)
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+ try:
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+ output.encode('us-ascii')
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+ except UnicodeEncodeError:
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+ charset = 'utf-8'
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+ else:
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+ charset = 'us-ascii'
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+ msg = MIMEText(output, 'plain', charset)
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msg['Subject'] = self.subject
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msg['From'] = self.opts.email_from
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msg['To'] = ",".join(self.opts.email_to)
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