jhillyerd / enmime / 31328812564

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Add ContentTransferEncoding field to force CTE on a Part (#396)

* Add ContentTransferEncoding field to force CTE on a Part

Allows callers to override the automatic Content-Transfer-Encoding
selection on a per-part basis. Valid values are "7bit", "8bit",
"base64", and "quoted-printable". Empty or unrecognised values
fall back to automatic detection.

This is useful for ASCII-safe content like PGP armor
(application/pgp-encrypted, application/pgp-signature) that would
otherwise be unnecessarily base64-encoded.

The forced CTE takes precedence over both the TextContent() gate
and the Encoder.ForceQuotedPrintableCte option.

Closes #395

* small improvements

Signed-off-by: James Hillyerd <james@hillyerd.com>

* always emit header when forced

Signed-off-by: James Hillyerd <james@hillyerd.com>

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Signed-off-by: James Hillyerd <james@hillyerd.com>

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