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gns3-server/gns3server/web/response.py

105 lines
3.6 KiB
Python

# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import json
import jsonschema
import aiohttp.web
import logging
import sys
import jinja2
from ..utils.get_resource import get_resource
from ..version import __version__
log = logging.getLogger(__name__)
renderer = jinja2.Environment(loader=jinja2.FileSystemLoader(get_resource('templates')))
class Response(aiohttp.web.Response):
def __init__(self, request=None, route=None, output_schema=None, headers={}, **kwargs):
self._route = route
self._output_schema = output_schema
self._request = request
headers['Access-Control-Allow-Origin'] = '*'
headers['X-Route'] = self._route
headers['Server'] = "Python/{0[0]}.{0[1]} GNS3/{1}".format(sys.version_info, __version__)
super().__init__(headers=headers, **kwargs)
def start(self, request):
if log.getEffectiveLevel() == logging.DEBUG:
log.info("%s %s", request.method, request.path_qs)
log.debug("%s", dict(request.headers))
if isinstance(request.json, dict):
log.debug("%s", request.json)
log.info("Response: %d %s", self.status, self.reason)
log.debug(dict(self.headers))
if hasattr(self, 'body') and self.body is not None and self.headers["CONTENT-TYPE"] == "application/json":
log.debug(json.loads(self.body.decode('utf-8')))
return super().start(request)
def html(self, answer):
"""
Set the response content type to text/html and serialize
the content.
:param anwser The response as a Python object
"""
self.content_type = "text/html"
self.body = answer.encode('utf-8')
def template(self, template_filename, **kwargs):
"""
Render a template
:params template: Template name
:params kwargs: Template parameters
"""
template = renderer.get_template(template_filename)
kwargs["gns3_version"] = __version__
kwargs["gns3_host"] = self._request.host
self.html(template.render(**kwargs))
def json(self, answer):
"""
Set the response content type to application/json and serialize
the content.
:param anwser The response as a Python object
"""
self.content_type = "application/json"
if hasattr(answer, '__json__'):
answer = answer.__json__()
if self._output_schema is not None:
try:
jsonschema.validate(answer, self._output_schema)
except jsonschema.ValidationError as e:
log.error("Invalid output query. JSON schema error: {}".format(e.message))
raise aiohttp.web.HTTPBadRequest(text="{}".format(e))
self.body = json.dumps(answer, indent=4, sort_keys=True).encode('utf-8')
def redirect(self, url):
"""
Redirect to url
:params url: Redirection URL
"""
raise aiohttp.web.HTTPFound(url)