[cups.development] Add Network Printer through libcups API

[Chad Hulbert]

The usage message for lpadmin indicates that -p is how you add a printer,
which ultimately arrives at set_printer_options().  That's where you should
be looking.

-Chad

On 8/30/11 4:59 PM, "Azuri" <azuri.shah at fmr.com> thusly spake:

> 
> The code I am currently using from lpadmin.c file is below. I get error saying
> can't find printer or class.
> 
> 
>  http_t *http ;
>     char *printer = "socket://10.105.152.49:9100";
>     char *pclass;
>     int  i;   /* Looping var */
>     ipp_t  *request,  /* IPP Request */
>     *response;  /* IPP Response */
>     ipp_attribute_t *attr,  /* Current attribute */
>     *members;  /* Members in class */
>     char  uri[HTTP_MAX_URI]; /* URI for printer/class */
> 
> 
> 
> 
>     /*
>      * Build an IPP_GET_PRINTER_ATTRIBUTES request, which requires the
> following
>      * attributes:
>      *
>      *    attributes-charset
>      *    attributes-natural-language
>      *    printer-uri
>      */
>     http = httpConnectEncrypt(cupsServer(), ippPort(), cupsEncryption());
>     request = ippNewRequest(IPP_GET_PRINTER_ATTRIBUTES);
> 
>     httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
>                      "localhost", 0, "/classes/%s", pclass);
>     ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
>                  "printer-uri", NULL, uri);
> 
>     /*
>      * Do the request and get back a response...
>      */
> 
>     response = cupsDoRequest(http, request, "/");
> 
>     /*
>      * Build a CUPS_ADD_CLASS request, which requires the following
>      * attributes:
>      *
>      *    attributes-charset
>      *    attributes-natural-language
>      *    printer-uri
>      *    member-uris
>      */
> 
>     request = ippNewRequest(CUPS_ADD_CLASS);
> 
>     ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
>                  "printer-uri", NULL, uri);
> 
>     /*
>      * See if the printer is already in the class...
>      */
> 
>     if (response != NULL &&
>         (members = ippFindAttribute(response, "member-names", IPP_TAG_NAME))
> != NULL)
>         for (i = 0; i < members->num_values; i ++)
>             if (strcasecmp(printer, members->values[i].string.text) == 0)
>             {
> 
>                 ippDelete(request);
>                 ippDelete(response);
>                 //return (0);
>             }
> 
>     /*
>      * OK, the printer isn't part of the class, so add it...
>      */
> 
>     httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
>                      "localhost", 0, "/printers/%s", printer);
> 
>     if (response != NULL &&
>         (members = ippFindAttribute(response, "member-uris", IPP_TAG_URI)) !=
> NULL)
>     {
>         /*
>          * Add the printer to the existing list...
>          */
> 
>         attr = ippAddStrings(request, IPP_TAG_PRINTER, IPP_TAG_URI,
>                              "member-uris", members->num_values + 1, NULL,
> NULL);
>         for (i = 0; i < members->num_values; i ++)
>             attr->values[i].string.text =
> _cupsStrAlloc(members->values[i].string.text);
> 
>         attr->values[i].string.text = _cupsStrAlloc(uri);
>     }
>     else
>         ippAddString(request, IPP_TAG_PRINTER, IPP_TAG_URI, "member-uris",
> NULL,
>                      uri);
> 
>     /*
>      * Then send the request...
>      */
> 
>     ippDelete(response);
> 
>     if ((response = cupsDoRequest(http, request, "/admin/")) == NULL)
>     {
> 
>     }
>     else if (response->request.status.status_code > IPP_OK_CONFLICT)
>     {
>         _cupsLangPrintf(stderr, "lpadmin: %s\n", cupsLastErrorString());
> 
>         ippDelete(response);
> 
>     }
>     else
>     {
>         ippDelete(response);
> 
>     }
> 
> 
> 
> 
> 
> 
> 
>> I did look at lpadmin.c file both its not working . But I am totally confusd.
>> I did look more into add_printer_to_class method but its not working. All I
>> want is when user enters socket://123.45.45.67 to UI, my code should go ahead
>> and add the printer tot he mac. I have spent hello lot of time trying to
>> figure this out using API's but no success at all so far. Your help will be
>> appreciated.
>> 
>> Russell,
>>> 
>>> Just download the CUPS source and look at the lpadmin tool.
>>> 
>>> -Chad
>>> 
>>> On 8/30/11 4:30 PM, "Azuri" <azuri.shah at fmr.com> thusly spake:
>>> 
>>>>> Russell Stewart wrote:
>>>>>> Michael Sweet wrote:
>>>>>> 
>>>>>>> You need to create an IPP request and send it using cupsDoFileRequest
>>>>>>> (assuming you are using a PPD file or interface script for the queue)
>>>>>> 
>>>>>> OK, I see. So I assume that ippNewRequest() is the method to call for
>>>>>> creating the IPP request, right?
>>>>> 
>>>>> Yes.  See the "CUPS Implementation of IPP" document for documentation
>>>>> on the attributes and operations:
>>>>> 
>>>>>      http://www.cups.org/documentation.php/spec-ipp.html
>>>>> 
>>>>> --
>>>>> ______________________________________________________________________
>>>>> Michael Sweet, Easy Software Products           mike at easysw dot com
>>>> 
>>>> 
>>>> Can you please provice code on how u did it? I am trying to do the same
>>>> time
>>>> but have no success so far. How can I use API's to add printer to my mac. I
>>>> am
>>>> developing a Coca app which provides GUI and takes user input to add
>>>> printer
>>>> using cups. Please let me know
>>>> _______________________________________________
>>>> cups-dev mailing list
>>>> cups-dev at easysw.com
>>>> http://lists.easysw.com/mailman/listinfo/cups-dev
>>> 
>>> Chad Hulbert
>>> Software Engineer
>>> Xerox Corporation
>>> 800 Phillips Rd
>>> Webster, NY 14580
>>> 
>>> p 585.427.3295  (8*707.3295)
>>> 
>> 
> 
> _______________________________________________
> cups-dev mailing list
> cups-dev at easysw.com
> http://lists.easysw.com/mailman/listinfo/cups-dev

Chad Hulbert
Software Engineer
Xerox Corporation
800 Phillips Rd
Webster, NY 14580

p 585.427.3295  (8*707.3295)