[Kimchi-devel] [WIP PATCH 4/5] Render different types of data in generate_action_handler

[Aline Manera]

Reviewed-by: Aline Manera <alinefm at linux.vnet.ibm.com>

On 10/17/2014 05:26 AM, Crístian Viana wrote:
> The function "generate_action_handler" creates a function which handles
> a string being returned by the underlying action function. However, in
> some cases, another type of element might be returned. The action
> "swupdate", for example, doesn't use "generate_action_handler" because
> it returns a Task instead of a string.
>
> Make the function "generate_action_handler" more modular so it can
> process different types of data.
>
> Signed-off-by: Crístian Viana <vianac at linux.vnet.ibm.com>
> ---
>   src/kimchi/control/base.py | 37 +++++++++++++++++++++++++++----------
>   src/kimchi/control/host.py | 18 +++---------------
>   2 files changed, 30 insertions(+), 25 deletions(-)
>
> diff --git a/src/kimchi/control/base.py b/src/kimchi/control/base.py
> index 1eb10bd..60db1df 100644
> --- a/src/kimchi/control/base.py
> +++ b/src/kimchi/control/base.py
> @@ -65,6 +65,29 @@ class Resource(object):
>               raise cherrypy.HTTPRedirect(self.uri_fmt % tuple(uri_params), code)
>   
>       def generate_action_handler(self, action_name, action_args=None):
> +        def _render_element(self, ident):
> +            self._redirect(ident)
> +            uri_params = []
> +            for arg in self.model_args:
> +                if arg is None:
> +                    arg = ''
> +                uri_params.append(urllib2.quote(arg.encode('utf-8'),
> +                                  safe=""))
> +            raise internal_redirect(self.uri_fmt % tuple(uri_params))
> +
> +        return self._generate_action_handler_base(action_name, _render_element,
> +                                                  action_args)
> +
> +    def generate_action_handler_task(self, action_name, action_args=None):
> +        def _render_task(self, task):
> +            cherrypy.response.status = 202
> +            return kimchi.template.render('Task', task)
> +
> +        return self._generate_action_handler_base(action_name, _render_task,
> +                                                  action_args)
> +
> +    def _generate_action_handler_base(self, action_name, render_fn,
> +                                      action_args=None):
>           def wrapper(*args, **kwargs):
>               validate_method(('POST'), self.role_key, self.admin_methods)
>               try:
> @@ -76,16 +99,10 @@ class Resource(object):
>                   if action_args is not None:
>                       request = parse_request()
>                       model_args.extend(request[key] for key in action_args)
> -                fn = getattr(self.model, model_fn(self, action_name))
> -                ident = fn(*model_args)
> -                self._redirect(ident)
> -                uri_params = []
> -                for arg in self.model_args:
> -                    if arg is None:
> -                        arg = ''
> -                    uri_params.append(urllib2.quote(arg.encode('utf-8'),
> -                                      safe=""))
> -                raise internal_redirect(self.uri_fmt % tuple(uri_params))
> +
> +                action_fn = getattr(self.model, model_fn(self, action_name))
> +                action_result = action_fn(*model_args)
> +                return render_fn(self, action_result)
>               except MissingParameter, e:
>                   raise cherrypy.HTTPError(400, e.message)
>               except InvalidParameter, e:
> diff --git a/src/kimchi/control/host.py b/src/kimchi/control/host.py
> index 7bcae72..4362da7 100644
> --- a/src/kimchi/control/host.py
> +++ b/src/kimchi/control/host.py
> @@ -17,12 +17,9 @@
>   # License along with this library; if not, write to the Free Software
>   # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
>   
> -import cherrypy
> -
>   from kimchi.control.base import Collection, Resource, SimpleCollection
> -from kimchi.control.utils import UrlSubNode, validate_method
> -from kimchi.exception import OperationFailed, NotFoundError
> -from kimchi.template import render
> +from kimchi.control.utils import UrlSubNode
> +from kimchi.exception import NotFoundError
>   
>   
>   @UrlSubNode('host', True)
> @@ -41,16 +38,7 @@ class Host(Resource):
>           self.repositories = Repositories(self.model)
>           self.users = Users(self.model)
>           self.groups = Groups(self.model)
> -
> -    @cherrypy.expose
> -    def swupdate(self):
> -        validate_method(('POST'), self.role_key, self.admin_methods)
> -        try:
> -            task = self.model.host_swupdate()
> -            cherrypy.response.status = 202
> -            return render("Task", task)
> -        except OperationFailed, e:
> -            raise cherrypy.HTTPError(500, e.message)
> +        self.swupdate = self.generate_action_handler_task('swupdate')
>   
>       @property
>       def data(self):