sebbASF opened a new issue #513: Bug: cluster generator fails to parse non-ascii subject and sender URL: https://github.com/apache/incubator-ponymail/issues/513 The cluster generator uses fields of the msg assuming that they will be strings. However that is not the case if non-ascii characters have been used. In such cases, code such as msg.get('subject') will return an email.header.Header object. This causes code such as bytes(subject, encoding = 'ascii') to fail with TypeError: encoding without a string argument In turn, this causes the archiver to revert to a very basic fallback mid: mid = hashlib.sha224(str("%s-%s" % (lid, msg_metadata['archived-at'])).encode('utf-8')).hexdigest() + "@" + (lid if lid else "none") **Unless archived-at is defined, this will be constant for a given list id** This is relatively easy to fix; the generator should use the msg_metadata dict which the archiver has already set up. HOWEVER, to ensure that it's possible to regenerate the same Permalinks, any fix MUST be implemented as a new generator type, with a new syntax (i.e. change the 'r' prefix). There are probably some other changes that need to be made to the cluster generator. For example, Message-Id should be canonicalised. Note that the fallback mid cannot be changed, as that would affect all the generators.
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