Implement images API for newton

Change-Id: Icf18a9906bd09b12c46c65e2c73262e7f449fac2
Issue-Id: MULTIVIM-22
Signed-off-by: Bin Yang <bin.yang@windriver.com>

2 files changed, 228 insertions, 0 deletions

diff --git a/newton/newton/requests/urls.py b/newton/newton/requests/urls.py
index 2b0e011b..fd5c988d 100644
--- a/newton/newton/requests/urls.py
+++ b/newton/newton/requests/urls.py
@@ -17,6 +17,7 @@ from rest_framework.urlpatterns import format_suffix_patterns
 
 from views import network
 from views import subnet
+from views import image
 from views import vport
 from views import limits
 from views import hosts
@@ -27,6 +28,8 @@ urlpatterns = [
         network.Networks.as_view()),
     url(r'^subnets(/(?P<subnetid>[0-9a-zA-Z_-]+))?',
         subnet.Subnets.as_view()),
+    url(r'^images(/(?P<imageid>[0-9a-zA-Z_-]+))?',
+        image.Images.as_view()),
     url(r'^ports(/(?P<portid>[0-9a-zA-Z_-]+))?',
         vport.Vports.as_view()),
     url(r'^flavors(/(?P<flavorid>[0-9a-zA-Z_-]+))?',
diff --git a/newton/newton/requests/views/image.py b/newton/newton/requests/views/image.py
new file mode 100644
index 00000000..24f4cb47
--- /dev/null
+++ b/newton/newton/requests/views/image.py
@@ -0,0 +1,225 @@
+# Copyright (c) 2017 Wind River Systems, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import logging
+import json
+import urllib2
+import threading
+
+from rest_framework import status
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from newton.pub.exceptions import VimDriverNewtonException
+
+from util import VimDriverUtils
+
+logger = logging.getLogger(__name__)
+
+running_threads = {}
+running_thread_lock = threading.Lock()
+
+class imageThread (threading.Thread):
+    service = {'service_type': 'image',
+               'interface': 'public',
+               'region_name': 'RegionOne'}
+    def __init__(self, vimid, tenantid, imageid, imagefd):
+        threading.Thread.__init__(self)
+        self.vimid = vimid
+        self.tenantid = tenantid
+        self.imageid = imageid
+        self.imagefd = imagefd
+
+    def run(self):
+        logger.debug("start imagethread %s, %s, %s" % (self.vimid, self.tenantid, self.imageid))
+        self.transfer_image(self.vimid, self.tenantid, self.imageid, self.imagefd)
+        logger.debug("stop imagethread %s, %s, %s" % (self.vimid, self.tenantid, self.imageid))
+        running_thread_lock.acquire()
+        running_threads.pop(self.imageid)
+        running_thread_lock.release()
+
+    def transfer_image(self, vimid, tenantid, imageid, imagefd):
+        logger.debug("Images--transfer_image::> %s" % (imageid))
+        try:
+            # prepare request resource to vim instance
+            req_resouce = "v2/images/%s/file" % imageid
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+
+            #open imageurl
+            resp = sess.put(req_resouce, endpoint_filter=self.service, data=imagefd.read(),
+                    headers={"Content-Type": "application/octet-stream",
+                             "Accept": ""})
+
+            logger.debug("response status code of transfer_image %s" % resp.status_code)
+            return None
+        except Exception as e:
+            logger.debug("Failed to transfer_image:%s" % str(e))
+            return None
+        pass
+
+class Images(APIView):
+    service = {'service_type': 'image',
+               'interface': 'public',
+               'region_name': 'RegionOne'}
+    keys_mapping = [
+        ("project_id", "tenantId"),
+        ("disk_format", "imageType"),
+        ("container_format", "containerFormat")
+    ]
+
+    def get(self, request, vimid="", tenantid="", imageid=""):
+        logger.debug("Images--get::> %s" % request.data)
+        try:
+            # prepare request resource to vim instance
+            query = VimDriverUtils.get_query_part(request)
+            content, status_code = self.get_images(query, vimid, tenantid, imageid)
+            return Response(data=content, status=status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    def get_images(self, query="", vimid="", tenantid="", imageid=""):
+        logger.debug("Images--get_images::> %s" % imageid)
+
+        # prepare request resource to vim instance
+        req_resouce = "v2/images"
+        if imageid:
+            req_resouce += "/%s" % imageid
+        elif query:
+            req_resouce += "?%s" % query
+
+        vim = VimDriverUtils.get_vim_info(vimid)
+        sess = VimDriverUtils.get_session(vim, tenantid)
+        resp = sess.get(req_resouce, endpoint_filter=self.service)
+        content = resp.json()
+        vim_dict = {
+            "vimName": vim["name"],
+            "vimId": vim["vimId"],
+            "tenantId": tenantid,
+        }
+        content.update(vim_dict)
+
+        if not imageid:
+            # convert the key naming in images
+            for image in content["images"]:
+                VimDriverUtils.replace_key_by_mapping(image,
+                                                      self.keys_mapping)
+        else:
+            # convert the key naming in the image specified by id
+            #image = content.pop("image", None)
+            VimDriverUtils.replace_key_by_mapping(content,
+                                                  self.keys_mapping)
+            #content.update(image)
+
+        return content, resp.status_code
+
+    def post(self, request, vimid="", tenantid="", imageid=""):
+        logger.debug("Images--post::> %s" % request.data)
+        try:
+            #check if created already: check name
+            query = "name=%s" % request.data["name"]
+            content, status_code = self.get_images(query, vimid, tenantid)
+            existed = False
+            if status_code == 200:
+                for image in content["images"]:
+                    if image["name"] == request.data["name"]:
+                        existed = True
+                        break
+                    pass
+                if existed == True:
+                    vim_dict = {
+                        "returnCode": 0,
+                    }
+                    image.update(vim_dict)
+                    return Response(data=image, status=status_code)
+
+            imageurl = request.data.pop("imagePath", None)
+            imagefd = None
+            if not imageurl:
+                return Response(data={'error': 'imagePath is not specified'}, status=500)
+
+            #valid image url
+            imagefd = urllib2.urlopen(imageurl)
+            if not imagefd:
+                logger.debug("image is not available at %s" % imageurl)
+                return Response(data={'error': 'cannot access to specified imagePath'}, status=500)
+
+                # prepare request resource to vim instance
+            req_resouce = "v2/images"
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+            image = request.data
+            VimDriverUtils.replace_key_by_mapping(image,
+                                                  self.keys_mapping, True)
+            #req_body = json.JSONEncoder().encode({"image": image})
+            req_body = json.JSONEncoder().encode(image)
+            resp = sess.post(req_resouce, data=req_body,
+                             endpoint_filter=self.service)
+            #resp_body = resp.json()["image"]
+            resp_body = resp.json()
+            VimDriverUtils.replace_key_by_mapping(resp_body, self.keys_mapping)
+            vim_dict = {
+                "vimName": vim["name"],
+                "vimId": vim["vimId"],
+                "tenantId": tenantid,
+                "returnCode": 1,
+            }
+            resp_body.update(vim_dict)
+
+            #launch a thread to download image and upload to VIM
+            if resp.status_code == 201:
+                imageid = resp_body["id"]
+                logger.debug("launch thread to upload image: %s" % imageid)
+                tmp_thread = imageThread(vimid, tenantid,imageid,imagefd)
+                running_thread_lock.acquire()
+                running_threads[imageid] = tmp_thread
+                running_thread_lock.release()
+                tmp_thread.start()
+            else:
+                logger.debug("resp.status_code: %s" % resp.status_code)
+                pass
+
+            return Response(data=resp_body, status=resp.status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except urllib2.URLError as e:
+            return Response(data={'error': 'image is not accessible:%s' % str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        pass
+
+    def delete(self, request, vimid="", tenantid="", imageid=""):
+        logger.debug("Images--delete::> %s" % request.data)
+        try:
+            # prepare request resource to vim instance
+            req_resouce = "v2/images"
+            if imageid:
+                req_resouce += "/%s" % imageid
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+            resp = sess.delete(req_resouce, endpoint_filter=self.service)
+            return Response(status=resp.status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        pass