--- airprint-generate.py	2012-10-06 19:49:51.000000000 +0200
+++ airprint-generate-rh.py	2015-04-07 20:35:38.626843480 +0200
@@ -20,6 +20,14 @@
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
+
+2015-04-07 Frank Bergmann, www.tuxad.com:
+ - blacklist some more types
+ - Red Hat / Fedora specific modifications:
+   * use /etc/avahi/services as default
+   * if image/urf is not available then create types/convs files (with
+     convs using pdftops as filter), recommend restarting cups and running
+     this script again
 """
 
 import cups, os, optparse, re, urlparse
@@ -85,8 +93,10 @@
     'image/x-xwindowdump': False,
     'image/x-xpixmap': False,
     'image/x-xbitmap': False,
+    'image/x-bitmap': False,
     'image/x-sun-raster': False,
     'image/x-sgi-rgb': False,
+    'image/x-photocd': False,
     'image/x-portable-pixmap': False,
     'image/x-portable-graymap': False,
     'image/x-portable-bitmap': False,
@@ -95,6 +105,8 @@
     'application/x-perl': False,
     'application/x-csource': False,
     'application/x-cshell': False,
+    'application/vnd.cups-raw': False,
+    'text/css': False,
 }
 
 class AirPrintGenerate(object):
@@ -107,6 +119,7 @@
         self.directory = directory
         self.prefix = prefix
         self.adminurl = adminurl
+        self.types_created = False
         
         if self.user:
             cups.setUser(self.user)
@@ -191,7 +204,17 @@
                         defer.append(a)
 
                 if 'image/urf' not in fmts:
-                    sys.stderr.write('image/urf is not in mime types, %s may not be available on ios6 (see https://github.com/tjfontaine/airprint-generate/issues/5)%s' % (p, os.linesep))
+                    if not os.path.exists('/usr/share/cups/mime/airprint.types'):
+                        sys.stderr.write('image/urf is not in mime types, generating airprint.types and airprint.convs; you should restart cups by "systemctl restart cups.service" and run this script again\n')
+                        file = open('/usr/share/cups/mime/airprint.types', 'w')
+                        file.write('image/urf urf string(0,UNIRAST<00>)\n')
+                        file.close()
+                        file = open('/usr/share/cups/mime/airprint.convs', 'w')
+                        file.write('image/urf application/vnd.cups-postscript 66 pdftops\n')
+                        file.close()
+                        self.types_created = True
+                    if not self.types_created:
+                        sys.stderr.write('image/urf is not in mime types, %s may not be available on ios6 (see https://github.com/tjfontaine/airprint-generate/issues/5)%s' % (p, os.linesep))
 
                 fmts = ','.join(fmts+defer)
 
@@ -243,7 +266,7 @@
         dest='username', help='Username to authenticate with against CUPS',
         metavar='USER')
     parser.add_option('-d', '--directory', action="store", type="string",
-        dest='directory', help='Directory to create service files',
+        dest='directory', help='Directory to create service files, default: /etc/avahi/services',
         metavar='DIRECTORY')
     parser.add_option('-v', '--verbose', action="store_true", dest="verbose",
         help="Print debugging information to STDERR")
@@ -261,15 +284,21 @@
     cups.setPasswordCB(getpass)
     
     if options.directory:
-        if not os.path.exists(options.directory):
-            os.mkdir(options.directory)
+        servicedir = options.directory
+        if not os.path.exists(servicedir):
+            os.mkdir(servicedir)
+    else:
+        # default on Red Hat / Fedora:
+        servicedir = "/etc/avahi/services"
+        if not os.path.exists(servicedir):
+            raise Exception('avahi services directory does not exist, maybe you should install avahi.')
     
     apg = AirPrintGenerate(
         user=options.username,
         host=options.hostname,
         port=options.port,
         verbose=options.verbose,
-        directory=options.directory,
+        directory=servicedir,
         prefix=options.prefix,
         adminurl=options.adminurl,
     )