C++ cupsServer函数代码示例

static const char *iprint_server(void)
{
	if ((lp_iprint_server() != NULL) && (strlen(lp_iprint_server()) > 0)) {
		DEBUG(10, ("iprint server explicitly set to %s\n",
			   lp_iprint_server()));
		return lp_iprint_server();
	}

	DEBUG(10, ("iprint server left to default %s\n", cupsServer()));
	return cupsServer();
}

/* This function allocates new instance of GtkCupsConnectionTest() and creates
 * a socket for communication with a CUPS server 'server'.
 */
GtkCupsConnectionTest *
gtk_cups_connection_test_new (const char *server,
                              const int   port)
{
  GtkCupsConnectionTest *result = NULL;
  gchar                 *port_str = NULL;

  result = g_new (GtkCupsConnectionTest, 1);

  if (port >= 0)
    port_str = g_strdup_printf ("%d", port);
  else
    port_str = g_strdup_printf ("%d", ippPort ());

  if (server != NULL)
    result->addrlist = httpAddrGetList (server, AF_UNSPEC, port_str);
  else
    result->addrlist = httpAddrGetList (cupsServer (), AF_UNSPEC, port_str);

  g_free (port_str);

  result->socket = -1;
  result->current_addr = NULL;
  result->last_wrong_addr = NULL;
  result->at_init = GTK_CUPS_CONNECTION_NOT_AVAILABLE;

  result->at_init = gtk_cups_connection_test_get_state (result);

  return result;
}

int getPrinterSharingStatus() {
  http_t* cups = nullptr;
  int num_settings = 0;
  cups_option_t* settings = nullptr;
  const char* value = nullptr;

  cups = httpConnect2(cupsServer(),
                      ippPort(),
                      nullptr,
                      AF_INET,
                      cupsEncryption(),
                      1,
                      30000,
                      nullptr);
  if (cups == nullptr) {
    return 0;
  }
  int ret = cupsAdminGetServerSettings(cups, &num_settings, &settings);
  if (ret != 0) {
    value = cupsGetOption("_share_printers", num_settings, settings);
    cupsFreeOptions(num_settings, settings);
  } else {
    VLOG(1) << "Unable to get CUPS server settings: " << cupsLastErrorString();
  }
  httpClose(cups);

  if (value != nullptr) {
    return *value == '1' ? 1 : 0;
  }
  return 0;
}

/*
* call-seq:
*   PrintJob.new(filename, printer=nil)
*
* Initializes a new PrintJob object. If no target printer/class is specified, the default is chosen.
* Note the specified file does not have to exist until print is called.
*/
static VALUE job_init(int argc, VALUE* argv, VALUE self)
{
  VALUE filename, printer, job_options;

  rb_scan_args(argc, argv, "12", &filename, &printer, &job_options);

  rb_iv_set(self, "@filename", filename);
  rb_iv_set(self, "@url_path", rb_str_new2(cupsServer()));

  if (NIL_P(job_options)) {
    rb_iv_set(self, "@job_options", rb_hash_new());
  } else {
    rb_iv_set(self, "@job_options", job_options);
  }

  if (NIL_P(printer)) {

    // Fall back to default printer
    VALUE def_p = rb_funcall(rubyCups, rb_intern("default_printer"), 0);

    if (def_p == Qfalse) {
			rb_raise(rb_eRuntimeError, "There is no default printer!");
		} else {
			rb_iv_set(self, "@printer", def_p);
		}

  } else {
    if (printer_exists(printer)) {
      rb_iv_set(self, "@printer", printer);
    } else {
      rb_raise(rb_eRuntimeError, "The printer or destination doesn't exist!");
    }
  }
  return self;
}

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line args */
     char *argv[])			/* I - Command-line arguments */
{
  int		i,			/* Looping var */
		num_settings;		/* Number of settings */
  cups_option_t	*settings;		/* Settings */
  http_t	*http;			/* Connection to server */


 /*
  * Connect to the server using the defaults...
  */

  http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC,
                      cupsEncryption(), 1, 30000, NULL);

 /*
  * Set the current configuration if we have anything on the command-line...
  */

  if (argc > 1)
  {
    for (i = 1, num_settings = 0, settings = NULL; i < argc; i ++)
      num_settings = cupsParseOptions(argv[i], num_settings, &settings);

    if (cupsAdminSetServerSettings(http, num_settings, settings))
    {
      puts("New server settings:");
      cupsFreeOptions(num_settings, settings);
    }
    else
    {
      printf("Server settings not changed: %s\n", cupsLastErrorString());
      return (1);
    }
  }
  else
    puts("Current server settings:");

 /*
  * Get the current configuration...
  */

  if (cupsAdminGetServerSettings(http, &num_settings, &settings))
  {
    show_settings(num_settings, settings);
    cupsFreeOptions(num_settings, settings);
    return (0);
  }
  else
  {
    printf("    %s\n", cupsLastErrorString());
    return (1);
  }
}

static rdpPrintJob* printer_cups_create_printjob(rdpPrinter* printer, UINT32 id)
{
	rdpCupsPrinter* cups_printer = (rdpCupsPrinter*) printer;
	rdpCupsPrintJob* cups_printjob;

	if (cups_printer->printjob != NULL)
		return NULL;

	cups_printjob = (rdpCupsPrintJob*) malloc(sizeof(rdpCupsPrintJob));
	ZeroMemory(cups_printjob, sizeof(rdpCupsPrintJob));

	cups_printjob->printjob.id = id;
	cups_printjob->printjob.printer = printer;

	cups_printjob->printjob.Write = printer_cups_write_printjob;
	cups_printjob->printjob.Close = printer_cups_close_printjob;

#ifndef _CUPS_API_1_4

	cups_printjob->printjob_object = _strdup(tmpnam(NULL));

#else
	{
		char buf[100];

		cups_printjob->printjob_object = httpConnectEncrypt(cupsServer(), ippPort(), HTTP_ENCRYPT_IF_REQUESTED);

		if (cups_printjob->printjob_object == NULL)
		{
			DEBUG_WARN("httpConnectEncrypt: %s", cupsLastErrorString());
			free(cups_printjob);
			return NULL;
		}

		printer_cups_get_printjob_name(buf, sizeof(buf));
		cups_printjob->printjob_id = cupsCreateJob((http_t*) cups_printjob->printjob_object,
			printer->name, buf, 0, NULL);

		if (cups_printjob->printjob_id == 0)
		{
			DEBUG_WARN("cupsCreateJob: %s", cupsLastErrorString());
			httpClose((http_t*) cups_printjob->printjob_object);
			free(cups_printjob);
			return NULL;
		}

		cupsStartDocument((http_t*) cups_printjob->printjob_object,
			printer->name, cups_printjob->printjob_id, buf, CUPS_FORMAT_AUTO, 1);
	}

#endif

	cups_printer->printjob = cups_printjob;
	
	return (rdpPrintJob*)cups_printjob;
}

uint32
printer_hw_create(IRP * irp, const char * path)
{
	PRINTER_DEVICE_INFO * info;

	info = (PRINTER_DEVICE_INFO *) irp->dev->info;

	/* Server's print queue will ensure no two print jobs will be sent to the same printer.
	   However, we still want to do a simple locking just to ensure we are safe. */
	if (info->printjob_object)
	{
		return RD_STATUS_DEVICE_BUSY;
	}

#ifndef _CUPS_API_1_4

	info->printjob_id++;
	info->printjob_object = strdup(tmpnam(NULL));

#else
	{
		char buf[100];

		info->printjob_object = httpConnectEncrypt(cupsServer(), ippPort(), HTTP_ENCRYPT_IF_REQUESTED);
		if (info->printjob_object == NULL)
		{
			LLOGLN(0, ("printer_hw_create: httpConnectEncrypt: %s", cupsLastErrorString()));
			return RD_STATUS_DEVICE_BUSY;
		}

		printer_hw_get_printjob_name(buf, sizeof(buf));
		info->printjob_id = cupsCreateJob((http_t *) info->printjob_object,
			info->printer_name, buf,
			0, NULL);

		if (info->printjob_id == 0)
		{
			LLOGLN(0, ("printer_hw_create: cupsCreateJob: %s", cupsLastErrorString()));
			httpClose((http_t *) info->printjob_object);
			info->printjob_object = NULL;
			/* Should get the right return code based on printer status */
			return RD_STATUS_DEVICE_BUSY;
		}
		cupsStartDocument((http_t *) info->printjob_object,
			info->printer_name, info->printjob_id, buf,
			CUPS_FORMAT_POSTSCRIPT, 1);
	}

#endif

	LLOGLN(10, ("printe_hw_create: %s id=%d", info->printer_name, info->printjob_id));
	irp->fileID = info->printjob_id;

	return RD_STATUS_SUCCESS;
}

static http_t *cups_connect(TALLOC_CTX *frame)
{
	http_t *http = NULL;
	char *server = NULL, *p = NULL;
	int port;
	int timeout = lp_cups_connection_timeout();
	size_t size;

	if (lp_cups_server(talloc_tos()) != NULL && strlen(lp_cups_server(talloc_tos())) > 0) {
		if (!push_utf8_talloc(frame, &server, lp_cups_server(talloc_tos()), &size)) {
			return NULL;
		}
	} else {
		server = talloc_strdup(frame,cupsServer());
	}
	if (!server) {
		return NULL;
	}

	p = strchr(server, ':');
	if (p) {
		port = atoi(p+1);
		*p = '\0';
	} else {
		port = ippPort();
	}

	DEBUG(10, ("connecting to cups server %s:%d\n",
		   server, port));

	gotalarm = 0;

	if (timeout) {
                CatchSignal(SIGALRM, gotalarm_sig);
                alarm(timeout);
        }

#ifdef HAVE_HTTPCONNECTENCRYPT
	http = httpConnectEncrypt(server, port, lp_cups_encrypt());
#else
	http = httpConnect(server, port);
#endif


	CatchSignal(SIGALRM, SIG_IGN);
        alarm(0);

	if (http == NULL) {
		DEBUG(0,("Unable to connect to CUPS server %s:%d - %s\n",
			 server, port, strerror(errno)));
	}

	return http;
}

http_t * oyGetCUPSConnection()
{
  if(!cups_http_)
  {
    httpInitialize();
    /* Open access to printer(s) installed on system. */
    cups_http_ = httpConnectEncrypt ( cupsServer(),
                                      ippPort(),
                                      cupsEncryption());
  }
  return cups_http_;
}

static void
connection_test_thread (GTask        *task,
                        gpointer      source_object,
                        gpointer      task_data,
                        GCancellable *cancellable)
{
  http_t *http;

  http = httpConnectEncrypt (cupsServer (), ippPort (), cupsEncryption ());
  g_task_return_boolean (task, http != NULL);

  httpClose (http);
}

static int GetCupsPrinters(char ***printer)
{
   http_t *http=NULL;     /* HTTP object */
   ipp_t *request=NULL;  /* IPP request object */
   ipp_t *response=NULL; /* IPP response object */
   ipp_attribute_t *attr;     /* Current IPP attribute */
   int cnt=0;

   /* Connect to the HTTP server */
   if ((http = httpConnectEncrypt(cupsServer(), ippPort(), cupsEncryption())) == NULL)
      goto bugout;

   /* Assemble the IPP request */
   request = ippNew();

   ippSetOperation( request, CUPS_GET_PRINTERS );
   ippSetRequestId( request, 1 );

   ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET, "attributes-charset", NULL, "utf-8");
   ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE, "attributes-natural-language", NULL, "en");
   ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD, "requested-attributes", NULL, "device-uri");

   /* Send the request and get a response. */
   if ((response = cupsDoRequest(http, request, "/")) == NULL)
      goto bugout;

   for (attr = ippFirstAttribute ( response ); attr != NULL; attr = ippNextAttribute( response ))
   {
      /* Skip leading attributes until we hit a printer. */
      while (attr != NULL && ippGetGroupTag( attr ) != IPP_TAG_PRINTER)
         attr = ippNextAttribute( response );

      if (attr == NULL)
         break;

      while (attr != NULL && ippGetGroupTag( attr ) == IPP_TAG_PRINTER)
      {
         if (strcmp(ippGetName( attr ), "device-uri") == 0 && ippGetValueTag( attr ) == IPP_TAG_URI && AddCupsList(ippGetString( attr, 0, NULL ), printer) == 0)
            cnt++;
         attr = ippNextAttribute( response );
      }

      if (attr == NULL)
         break;
   }

   ippDelete(response);

 bugout:
   return cnt;
}

static http_t *				/* O - New HTTP connection */
connect_server(const char *command,	/* I - Command name */
               http_t     *http)	/* I - Current HTTP connection */
{
  if (!http)
  {
    http = httpConnectEncrypt(cupsServer(), ippPort(),
	                      cupsEncryption());

    if (http == NULL)
    {
      _cupsLangPrintf(stderr, _("%s: Unable to connect to server."), command);
      exit(1);
    }
  }

  return (http);
}

//.........这里部分代码省略.........
        * Delete the specified job ID.
	*/

        dest   = NULL;
	op     = IPP_CANCEL_JOB;
        job_id = atoi(argv[i]);
      }
      else
      {
       /*
        * Bad printer name!
	*/

        _cupsLangPrintf(stderr,
	                _("%s: Error - unknown destination \"%s\"!\n"),
			argv[0], argv[i]);
	return (1);
      }

     /*
      * For Solaris LP compatibility, ignore a destination name after
      * cancelling a specific job ID...
      */

      if (job_id && (i + 1) < argc &&
          cupsGetDest(argv[i + 1], NULL, num_dests, dests) != NULL)
        i ++;

     /*
      * Open a connection to the server...
      */

      if (http == NULL)
	if ((http = httpConnectEncrypt(cupsServer(), ippPort(),
	                               cupsEncryption())) == NULL)
	{
	  _cupsLangPrintf(stderr,
	                  _("%s: Unable to contact server!\n"),
			  argv[0]);
	  return (1);
	}

     /*
      * Build an IPP request, which requires the following
      * attributes:
      *
      *    attributes-charset
      *    attributes-natural-language
      *    printer-uri + job-id *or* job-uri
      *    [requesting-user-name]
      */

      request = ippNewRequest(op);

      if (dest)
      {
	httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
	                 "localhost", 0, "/printers/%s", dest);
	ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
	             "printer-uri", NULL, uri);
	ippAddInteger(request, IPP_TAG_OPERATION, IPP_TAG_INTEGER, "job-id",
	              job_id);
      }
      else
      {
        sprintf(uri, "ipp://localhost/jobs/%d", job_id);

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line arguments */
     char *argv[])			/* I - Command-line arguments */
{
  const char	*printer;		/* Printer name */
  const char	*user;			/* Username */
  http_t	*http;			/* Connection to the server */
  ipp_t		*request,		/* IPP request */
		*response;		/* IPP response */
  ipp_attribute_t *attr;		/* IPP attribute */
  const char	*op;			/* Operation to perform, if any */
  static const char *def_attrs[] =	/* Attributes for default printer */
		{
		  "printer-name",
		  "printer-uri-supported"
		};


 /*
  * Get any form variables...
  */

  cgiInitialize();

  op = cgiGetVariable("OP");

 /*
  * Set the web interface section...
  */

  cgiSetVariable("SECTION", "printers");
  cgiSetVariable("REFRESH_PAGE", "");

 /*
  * See if we are displaying a printer or all printers...
  */

  if ((printer = getenv("PATH_INFO")) != NULL)
  {
    printer ++;

    if (!*printer)
      printer = NULL;

    if (printer)
      cgiSetVariable("PRINTER_NAME", printer);
  }

 /*
  * See who is logged in...
  */

  user = getenv("REMOTE_USER");

 /*
  * Connect to the HTTP server...
  */

  http = httpConnectEncrypt(cupsServer(), ippPort(), cupsEncryption());

 /*
  * Get the default printer...
  */

  if (!op || !cgiIsPOST())
  {
   /*
    * Get the default destination...
    */

    request = ippNewRequest(CUPS_GET_DEFAULT);

    ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD,
                  "requested-attributes",
		  sizeof(def_attrs) / sizeof(def_attrs[0]), NULL, def_attrs);

    if ((response = cupsDoRequest(http, request, "/")) != NULL)
    {
      if ((attr = ippFindAttribute(response, "printer-name", IPP_TAG_NAME)) != NULL)
        cgiSetVariable("DEFAULT_NAME", attr->values[0].string.text);

      if ((attr = ippFindAttribute(response, "printer-uri-supported", IPP_TAG_URI)) != NULL)
      {
	char	url[HTTP_MAX_URI];	/* New URL */


        cgiSetVariable("DEFAULT_URI",
	               cgiRewriteURL(attr->values[0].string.text,
		                     url, sizeof(url), NULL));
      }

      ippDelete(response);
    }

   /*
    * See if we need to show a list of printers or the status of a
    * single printer...
    */

    if (!printer)
//.........这里部分代码省略.........

http_t *				/* O - HTTP connection */
_cupsConnect(void)
{
  _cups_globals_t *cg = _cupsGlobals();	/* Pointer to library globals */


 /*
  * See if we are connected to the same server...
  */

  if (cg->http)
  {
   /*
    * Compare the connection hostname, port, and encryption settings to
    * the cached defaults; these were initialized the first time we
    * connected...
    */

    if (strcmp(cg->http->hostname, cg->server) ||
        cg->ipp_port != httpAddrPort(cg->http->hostaddr) ||
        (cg->http->encryption != cg->encryption &&
	 cg->http->encryption == HTTP_ENCRYPTION_NEVER))
    {
     /*
      * Need to close the current connection because something has changed...
      */

      httpClose(cg->http);
      cg->http = NULL;
    }
    else
    {
     /*
      * Same server, see if the connection is still established...
      */

      char	ch;			/* Connection check byte */
      ssize_t	n;			/* Number of bytes */

#ifdef WIN32
      if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK)) == 0 ||
          (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK))
#else
      if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK | MSG_DONTWAIT)) == 0 ||
          (n < 0 && errno != EWOULDBLOCK))
#endif /* WIN32 */
      {
       /*
        * Nope, close the connection...
        */

	httpClose(cg->http);
	cg->http = NULL;
      }
    }
  }

 /*
  * (Re)connect as needed...
  */

  if (!cg->http)
  {
    if ((cg->http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC,
				 cupsEncryption(), 1, 30000, NULL)) == NULL)
    {
      if (errno)
        _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, NULL, 0);
      else
        _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE,
	              _("Unable to connect to host."), 1);
    }
  }

 /*
  * Return the cached connection...
  */

  return (cg->http);
}