[cups] Printer-Attributes question

[Дмитрий Воронин]

Hello,

> Yes, printer-uri-supported is a "1setOf uri" attribute, which means 1 or more values.  But there should only be a single instance of the printer-uri-supported attribute, regardless of the number of values.

> No.

> Some operations return multiple groups of attributes so (for example) you'll see multiple "job-name" attributes in the response to Get-Jobs.  Each group of attributes is separated by an xxx-group-tag on the wire, which shows up as an empty attribute in the list with > a NULL name and group tag of IPP_TAG_ZERO.

> For operations that only return a single group of attributes, you can assume that attribute names are unique within that group and can rely on the return value from ippFindAttribute.

Ok, here I run this code for getting printers:

    ipp_t *request = ippNewRequest( CUPS_GET_PRINTERS );

    ippAddString( request
                 , IPP_TAG_OPERATION
                 , IPP_TAG_KEYWORD
                 , "requested-attributes"
                 , NULL
                 , "printer-description"/*"all"*/ );
    ipp_t *responce = cupsDoRequest( &connection
                                   , request
                                   , "/" );
    for ( ipp_attribute_t *attribute = ippFirstAttribute( responce );
          attribute;
          attribute = ippNextAttribute( responce ) )
    {
		/* get attribute and it's value */
    }


When code is running, I have output: (please see attachmnent). I see that as part of one group comes 2 attribute printer-uri-supported.

I use CUPS 2.1.3

-- 
Best regards, Dmitry Voronin