repeated :encoding-delimiter

[d-t-w]

Hi Zach,

I'm using Gloss to decode different types of repeated headers, often following the Internet Message (RFC-5322) style.

Given the simple case of a repeated header in the style "key:value\r\n" where the total section is delimited by "\r\n\r\n", I can decode fine with a codec like:

(defcodec basic-header
  [(string :utf-8 :delimiters [":"]) 
   (string :utf-8 :delimiters ["\r\n" "\r\n\r\n"])])

(defcodec basic-headers
  (repeated basic-header :delimiters ["\r\n\r\n"]
                         :strip-delimiters? false))

i.e. Leave the repeated section delimiter to be consumed by the inner codec.

Decoding is fine, the problem is when encoding Gloss will emit a delimiter for each inner header, "\r\n", then the delimiter for the repeated section "\r\n\r\n", leaving me with one too many "\r\n\r\n"

While I'm not actually encoding headers, I thought it might be a nice addition to be able to specify the encoding-delimiter for a repeated section:

(defcodec basic-headers
  (repeated basic-header :delimiters ["\r\n\r\n"]
                         :encoding-delimiter "\r\n"
                         :strip-delimiters? false))

If this is agreeable I'd be happy to supply a pull-request for you.

More information here: http://derek.troywest.com/articles/by-example-gloss/#basic-limitations

Thanks, Derek