RFC 2111 - Content-ID and Message-ID Uniform Resource Locators

CID : Content ID 에 대해 기술되어 있음.

 

http://www.faqs.org/rfcs/rfc2111.html

 

처음 본문 파트는 Content-Type: multipart/alternative; 로 구성.

두개의 파트는 multipart/related 포함.

text/html 의 img tag 에는 cidurl 포함.

 

MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_215220_2147150575.1410422452274" Importance: normal X-Priority: 3 (Normal) X-Naver-CIP: 112.216.111.22 ------=_Part_215220_2147150575.1410422452274 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 67O466y4IOyLnOyekSAKIAoK67aE66y4IOyiheujjAo= ------=_Part_215220_2147150575.1410422452274 Content-Type: multipart/related; boundary="----=_Part_215221_844509837.1410422452274" ------=_Part_215221_844509837.1410422452274 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: base64 PGRpdiBzdHlsZT0iZm9udC1zaXplOjEwcHQ7IGZvbnQtZmFtaWx5Okd1bGltOyI+PHA+67O466y4 Jm5ic3A77Iuc7J6RJm5ic3A7PC9wPjxwPiZuYnNwOzwvcD48cD48aW1nIGNsYXNzPSJOSE5fTUFJ TF9JTUFHRSIgc3JjPSJjaWQ6NTc0NmM3NzRmNjQ0MzA4ZDgyNzExY2QzY2M0NmRjNjVAY3dlYjAy Lm5tLm5obnN5c3RlbS5jb20iPjwvcD48cD7rtoTrrLgg7KKF66OMPC9wPjwvZGl2Pg1== ------=_Part_215221_844509837.1410422452274 Content-Type: image/png Content-Transfer-Encoding: base64 Content-Disposition: inline; filename=image.png Content-ID: <5746c774f644308d82711cd3cc46dc65@test.com> iVBORw0KGgoAAAANSUhEUgAAAUAAAADwCAIAAAD+Tyo8AAAHNUlEQVR42u3bTW9T2QHH4dh5Mw7B

22~25 line 을 base64 decoding 을 하면 아래와 같이 IMG tag에 CID 가 있음.

<div style="font-size: 10pt; font-family: Gulim;"> <p>본문 시작 </p> <p> </p> <p> <img src="cid:5746c774f644308d82711cd3cc46dc65@test.com"> </p> <p>분문 종료</p> </div>