text encoding for external filter

[xunam]

Hello,

Message parts that are sent to external filters are sent without charset conversion but there seems to be no way to inform the filter of the charset it receives.

Consequence: filtering a text/html part in ISO-8859-1 through Pandoc makes it crash, since it only accepts UTF-8 input, and there is no way to iconv the data first to fix this.

[xunam]

Come to think of it, why not use .mailcap in the first place ? It provides the same functionality as bower's open_part and filter configuration but in a way that is already well established and thought out. It is certainly some work to implement it but there might be libraries for that.

[wangp]

The obvious thing would be to pass the content-type and charset through environment variables. Rather not deal with mailcap.

[xunam]

indeed, that seems to be the right solution assuming mailcap is not used (which can be argued for).

[wangp]

The environment variables are PART_CONTENT_TYPE and PART_CHARSET.