Get a string representing a URI in IETF standard format
(see http://www.ietf.org/rfc/rfc2396.txt) from which the object's content
may be streamed in the specified mime-type, if one is available.
If mime_type is NULL, the URI for the default (and possibly only) mime-type is
returned.
Note that it is possible for get_uri to return NULL but for
get_stream to work nonetheless, since not all GIOChannels connect to URIs.
Since 1.12
Get a string representing a URI in IETF standard format (see http://www.ietf.org/rfc/rfc2396.txt) from which the object's content may be streamed in the specified mime-type, if one is available. If mime_type is NULL, the URI for the default (and possibly only) mime-type is returned. Note that it is possible for get_uri to return NULL but for get_stream to work nonetheless, since not all GIOChannels connect to URIs. Since 1.12