Hi ,
I am implementing a SIP Parser . The parser is being developed based on RFC
3261.
I need a help on the following issue.
How will the parser be able to distinguish whether the uri is having opaque
part or is it consisting of username hostname etc for headers like Contact To
,From wherein both absolute URI and the normal type of URI are allowed
eg: To:"Disp"<http:[EMAIL PROTECTED]>
In case of headers that have only absoluteURI like Alert-Info ,Call-Info ,it
easy to get opaque part. What do we do in case of headers like To, From etc
RFC 3261 ABNF
absoluteURI := abs-scheme ":" ( hier-part / opaque-part )
abs-scheme := scheme
hier-part := ( net-path / abs-path ) [ "?" query ]
net-path := "//" authority [ abs-path ]
abs-path := "/" path-segments
opaque-part := uric-no-slash *uric
uric := reserved / unreserved / escaped
uric-no-slash := unreserved / escaped / ";" / "?" / ":" / "@"
/ "&" / "=" / "+" / "$" / ","
Thanks in advance
veda
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