[asterisk-users] PJSIP and the pound (#) as %23

[Matthew Jordan]

On Wed, Jul 20, 2016 at 6:47 AM, Saint Michael <venefax at gmail.com> wrote:
>
> Is there any way to make PJSIP send the "#" as "#" and not as %23 in the INVITE?
> I cannot figure this out.
>

The '#' character is a delimiter in URIs, and must be escaped if not
being used as such. Quoting RFC 2396, 2.4.3 [1]:

> The angle-bracket "<" and ">" and double-quote (") characters are
> excluded because they are often used as the delimiters around URI in
> text documents and protocol fields.  The character "#" is excluded
> because it is used to delimit a URI from a fragment identifier in URI
> references (Section 4). The percent character "%" is excluded because
> it is used for the encoding of escaped characters.
>
> delims      = "<" | ">" | "#" | "%" | <">

PJSIP is doing the "right thing" by escape encoding the reserved character.

[1] https://www.ietf.org/rfc/rfc2396.txt

-- 
Matthew Jordan
Digium, Inc. | CTO
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
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