URI processing module

[William Candillon]

URI processing is a very common operation in XQuery and expath http client requires a lot of URI processing,

Zorba should provide the following functions:
uri:parse($uri as xs:string) as schema-element(uri:uri)
uri:serialize($uri as schema-element(uri:uri) ) as xs:string

[Chris Hillery (ceejatec)]

Luis - this should be implemented using Zorba's internal URI class (src/zorbatypes/URI.cpp), so it'll have to be a built-in module.

Suggested steps:

1. Define a schema for the <uri:uri> element in the function signatures above. It should be fairly simple - just needs child elements or attributes for all the component parts of a URI: scheme, authority, path, query, fragment, and possibly host, username, etc. See http://docs.oracle.com/javase/1.4.2/docs/api/java/net/URI.html for a good discussion of the form of a URI. Time: 1 day for initial proposal, plus some discussion.

2. Implement uri:parse() using URI.cpp to break apart the URI into a <uri:uri> element; don't forget lots of tests for all possible forms. Time: 2 days.

3. Implement uri:serialize() to put it back together again; tests. Time: 2 days.

4. Extend URI.cpp to more clearly support opaque URIs, and extend schema and module to support them. Time: 2 days.

[Chris Hillery (ceejatec)]

As mentioned - sorry, Luis, but the current thinking is that this module should accept and produce JSON rather than XML. Please suggest a JSON object structure based on your current XML schema.