Regex to extract boundary and content type out of Mail headers

Question

I'm using a parsing service and we get the following headers string when an email is received:

Message-ID: <[email protected]>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----=_NextPart_000_00EB_01CCE26A.183F8AD0"
X-Mailer: Microsoft Office Outlook 12.0

Unfortunately i'm weak at regex and wondering how to extract the boundary and content type to end up with just:

[:content_type] => multipart/mixed
[:boundary] => ----=_NextPart_000_00EB_01CCE26A.183F8AD0

Richard Brown · Accepted Answer · 2013-03-18T23:03:41.350

1

This regex will match the text:

/Type:\s{0,}(.*?);\sboundary=\"(.*?)\"/

Note the two capture groups for the data you want.

edited Mar 18 '13 at 23:03

answered Mar 18 '13 at 22:42

Richard Brown

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This worked until i added a space after `\s` because sometimes there's multiple spaces. Thanks! – CodeOverload Mar 18 '13 at 22:49
I think there should be also multiple-space control right before boundary= – Jaime Aug 09 '16 at 06:15

score 0 · Answer 2 · answered Jan 21 '22 at 20:45

0

Based on the allowed characters the regex would be something like this.

boundary=\"?([a-zA-Z0-9'\(\)+_,-.\/:=? ]*)(?<! )\"?

answered Jan 21 '22 at 20:45

Adam Eri

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Regex to extract boundary and content type out of Mail headers

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