[SIPForum-discussion] help:Header Field Format?
雨 陈
chen.yu26 at yahoo.com.cn
Wed Dec 19 13:54:46 UTC 2007
Hi, all
Now , I meet a big problem in the SIP message parsing―the structure of header field:
1. field-name : field-value
on either side of the colon(":"), the arbitrary amount of whitespace is unlimited in theory. So what does the “whitespace” mean? a SP or HTAB?
2. a folding field-value
If the SIP header field values be folded onto multiple lines.
For instance,
Subject: This is a test => Subject: This
is a test
So on the two lines, which kind of character will follow the word “This" and "test"as an end of each line?
Is there still a CRLF? before interpreting the field value of “Subject”, should I use a single SP instead of all the special spaces between “This” and “is”?
Moreover, is there any possible that these following fields to be split into a multiple line representation?
Call-ID, CSeq, From, Context-Type
Merry Christmas!
Nora
---------------------------------
雅虎邮箱传递新年祝福,个性贺卡送亲朋!
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