root / api / images.py @ f533f224
History | View | Annotate | Download (9.7 kB)
| 1 |
#
|
|---|---|
| 2 |
# Copyright (c) 2010 Greek Research and Technology Network
|
| 3 |
#
|
| 4 |
|
| 5 |
from django.conf.urls.defaults import patterns |
| 6 |
from django.http import HttpResponse |
| 7 |
from django.template.loader import render_to_string |
| 8 |
from django.utils import simplejson as json |
| 9 |
|
| 10 |
from synnefo.api import util |
| 11 |
from synnefo.api.common import method_not_allowed |
| 12 |
from synnefo.api.faults import BadRequest |
| 13 |
from synnefo.db.models import Image, ImageMetadata |
| 14 |
|
| 15 |
|
| 16 |
urlpatterns = patterns('synnefo.api.images',
|
| 17 |
(r'^(?:/|.json|.xml)?$', 'demux'), |
| 18 |
(r'^/detail(?:.json|.xml)?$', 'list_images', {'detail': True}), |
| 19 |
(r'^/(\d+)(?:.json|.xml)?$', 'image_demux'), |
| 20 |
(r'^/(\d+)/meta(?:.json|.xml)?$', 'metadata_demux'), |
| 21 |
(r'^/(\d+)/meta/(.+?)(?:.json|.xml)?$', 'metadata_item_demux'), |
| 22 |
) |
| 23 |
|
| 24 |
def demux(request): |
| 25 |
if request.method == 'GET': |
| 26 |
return list_images(request)
|
| 27 |
elif request.method == 'POST': |
| 28 |
return create_image(request)
|
| 29 |
else:
|
| 30 |
return method_not_allowed(request)
|
| 31 |
|
| 32 |
def image_demux(request, image_id): |
| 33 |
if request.method == 'GET': |
| 34 |
return get_image_details(request, image_id)
|
| 35 |
elif request.method == 'DELETE': |
| 36 |
return delete_image(request, image_id)
|
| 37 |
else:
|
| 38 |
return method_not_allowed(request)
|
| 39 |
|
| 40 |
def metadata_demux(request, image_id): |
| 41 |
if request.method == 'GET': |
| 42 |
return list_metadata(request, image_id)
|
| 43 |
elif request.method == 'POST': |
| 44 |
return update_metadata(request, image_id)
|
| 45 |
else:
|
| 46 |
return method_not_allowed(request)
|
| 47 |
|
| 48 |
def metadata_item_demux(request, image_id, key): |
| 49 |
if request.method == 'GET': |
| 50 |
return get_metadata_item(request, image_id, key)
|
| 51 |
elif request.method == 'PUT': |
| 52 |
return create_metadata_item(request, image_id, key)
|
| 53 |
elif request.method == 'DELETE': |
| 54 |
return delete_metadata_item(request, image_id, key)
|
| 55 |
else:
|
| 56 |
return method_not_allowed(request)
|
| 57 |
|
| 58 |
|
| 59 |
def image_to_dict(image, detail=True): |
| 60 |
d = {'id': image.id, 'name': image.name}
|
| 61 |
if detail:
|
| 62 |
d['updated'] = util.isoformat(image.updated)
|
| 63 |
d['created'] = util.isoformat(image.created)
|
| 64 |
d['status'] = image.state
|
| 65 |
d['progress'] = 100 if image.state == 'ACTIVE' else 0 |
| 66 |
if image.sourcevm:
|
| 67 |
d['serverRef'] = image.sourcevm.id
|
| 68 |
|
| 69 |
metadata = {}
|
| 70 |
for meta in ImageMetadata.objects.filter(image=image): |
| 71 |
metadata[meta.meta_key] = meta.meta_value |
| 72 |
|
| 73 |
if metadata:
|
| 74 |
d['metadata'] = {'values': metadata} |
| 75 |
|
| 76 |
return d
|
| 77 |
|
| 78 |
def metadata_to_dict(image): |
| 79 |
image_meta = image.imagemetadata_set.all() |
| 80 |
return dict((meta.meta_key, meta.meta_value) for meta in image_meta) |
| 81 |
|
| 82 |
|
| 83 |
@util.api_method('GET') |
| 84 |
def list_images(request, detail=False): |
| 85 |
# Normal Response Codes: 200, 203
|
| 86 |
# Error Response Codes: computeFault (400, 500),
|
| 87 |
# serviceUnavailable (503),
|
| 88 |
# unauthorized (401),
|
| 89 |
# badRequest (400),
|
| 90 |
# overLimit (413)
|
| 91 |
|
| 92 |
since = util.isoparse(request.GET.get('changes-since'))
|
| 93 |
|
| 94 |
if since:
|
| 95 |
avail_images = Image.objects.filter(owner=request.user, |
| 96 |
updated__gte=since) |
| 97 |
if not avail_images: |
| 98 |
return HttpResponse(status=304) |
| 99 |
else:
|
| 100 |
avail_images = Image.objects.filter(owner=request.user) |
| 101 |
|
| 102 |
images = [image_to_dict(image, detail) for image in avail_images] |
| 103 |
|
| 104 |
if request.serialization == 'xml': |
| 105 |
data = render_to_string('list_images.xml', {
|
| 106 |
'images': images,
|
| 107 |
'detail': detail})
|
| 108 |
else:
|
| 109 |
data = json.dumps({'images': {'values': images}})
|
| 110 |
|
| 111 |
return HttpResponse(data, status=200) |
| 112 |
|
| 113 |
@util.api_method('POST') |
| 114 |
def create_image(request): |
| 115 |
# Normal Response Code: 202
|
| 116 |
# Error Response Codes: computeFault (400, 500),
|
| 117 |
# serviceUnavailable (503),
|
| 118 |
# unauthorized (401),
|
| 119 |
# badMediaType(415),
|
| 120 |
# itemNotFound (404),
|
| 121 |
# badRequest (400),
|
| 122 |
# serverCapacityUnavailable (503),
|
| 123 |
# buildInProgress (409),
|
| 124 |
# resizeNotAllowed (403),
|
| 125 |
# backupOrResizeInProgress (409),
|
| 126 |
# overLimit (413)
|
| 127 |
|
| 128 |
req = util.get_request_dict(request) |
| 129 |
|
| 130 |
try:
|
| 131 |
d = req['image']
|
| 132 |
server_id = d['serverRef']
|
| 133 |
name = d['name']
|
| 134 |
except (KeyError, ValueError): |
| 135 |
raise BadRequest('Malformed request.') |
| 136 |
|
| 137 |
owner = request.user |
| 138 |
vm = util.get_vm(server_id, owner) |
| 139 |
image = Image.objects.create(name=name, owner=owner, sourcevm=vm) |
| 140 |
|
| 141 |
imagedict = image_to_dict(image) |
| 142 |
if request.serialization == 'xml': |
| 143 |
data = render_to_string('image.xml', {'image': imagedict}) |
| 144 |
else:
|
| 145 |
data = json.dumps({'image': imagedict})
|
| 146 |
|
| 147 |
return HttpResponse(data, status=202) |
| 148 |
|
| 149 |
@util.api_method('GET') |
| 150 |
def get_image_details(request, image_id): |
| 151 |
# Normal Response Codes: 200, 203
|
| 152 |
# Error Response Codes: computeFault (400, 500),
|
| 153 |
# serviceUnavailable (503),
|
| 154 |
# unauthorized (401),
|
| 155 |
# badRequest (400),
|
| 156 |
# itemNotFound (404),
|
| 157 |
# overLimit (413)
|
| 158 |
|
| 159 |
image = util.get_image(image_id, request.user) |
| 160 |
imagedict = image_to_dict(image) |
| 161 |
|
| 162 |
if request.serialization == 'xml': |
| 163 |
data = render_to_string('image.xml', {'image': imagedict}) |
| 164 |
else:
|
| 165 |
data = json.dumps({'image': imagedict})
|
| 166 |
|
| 167 |
return HttpResponse(data, status=200) |
| 168 |
|
| 169 |
@util.api_method('DELETE') |
| 170 |
def delete_image(request, image_id): |
| 171 |
# Normal Response Code: 204
|
| 172 |
# Error Response Codes: computeFault (400, 500),
|
| 173 |
# serviceUnavailable (503),
|
| 174 |
# unauthorized (401),
|
| 175 |
# itemNotFound (404),
|
| 176 |
# overLimit (413)
|
| 177 |
|
| 178 |
image = util.get_image(image_id, request.user) |
| 179 |
image.delete() |
| 180 |
return HttpResponse(status=204) |
| 181 |
|
| 182 |
@util.api_method('GET') |
| 183 |
def list_metadata(request, image_id): |
| 184 |
# Normal Response Codes: 200, 203
|
| 185 |
# Error Response Codes: computeFault (400, 500),
|
| 186 |
# serviceUnavailable (503),
|
| 187 |
# unauthorized (401),
|
| 188 |
# badRequest (400),
|
| 189 |
# overLimit (413)
|
| 190 |
|
| 191 |
image = util.get_image(image_id, request.user) |
| 192 |
metadata = metadata_to_dict(image) |
| 193 |
return util.render_metadata(request, metadata, use_values=True, status=200) |
| 194 |
|
| 195 |
@util.api_method('POST') |
| 196 |
def update_metadata(request, image_id): |
| 197 |
# Normal Response Code: 201
|
| 198 |
# Error Response Codes: computeFault (400, 500),
|
| 199 |
# serviceUnavailable (503),
|
| 200 |
# unauthorized (401),
|
| 201 |
# badRequest (400),
|
| 202 |
# buildInProgress (409),
|
| 203 |
# badMediaType(415),
|
| 204 |
# overLimit (413)
|
| 205 |
|
| 206 |
image = util.get_image(image_id, request.user) |
| 207 |
req = util.get_request_dict(request) |
| 208 |
try:
|
| 209 |
metadata = req['metadata']
|
| 210 |
assert isinstance(metadata, dict) |
| 211 |
except (KeyError, AssertionError): |
| 212 |
raise BadRequest('Malformed request.') |
| 213 |
|
| 214 |
updated = {}
|
| 215 |
|
| 216 |
for key, val in metadata.items(): |
| 217 |
try:
|
| 218 |
meta = ImageMetadata.objects.get(meta_key=key, image=image) |
| 219 |
meta.meta_value = val |
| 220 |
meta.save() |
| 221 |
updated[key] = val |
| 222 |
except ImageMetadata.DoesNotExist:
|
| 223 |
pass # Ignore non-existent metadata |
| 224 |
|
| 225 |
if updated:
|
| 226 |
image.save() |
| 227 |
|
| 228 |
return util.render_metadata(request, updated, status=201) |
| 229 |
|
| 230 |
@util.api_method('GET') |
| 231 |
def get_metadata_item(request, image_id, key): |
| 232 |
# Normal Response Codes: 200, 203
|
| 233 |
# Error Response Codes: computeFault (400, 500),
|
| 234 |
# serviceUnavailable (503),
|
| 235 |
# unauthorized (401),
|
| 236 |
# itemNotFound (404),
|
| 237 |
# badRequest (400),
|
| 238 |
# overLimit (413)
|
| 239 |
|
| 240 |
image = util.get_image(image_id, request.user) |
| 241 |
meta = util.get_image_meta(image, key) |
| 242 |
return util.render_meta(request, meta, status=200) |
| 243 |
|
| 244 |
@util.api_method('PUT') |
| 245 |
def create_metadata_item(request, image_id, key): |
| 246 |
# Normal Response Code: 201
|
| 247 |
# Error Response Codes: computeFault (400, 500),
|
| 248 |
# serviceUnavailable (503),
|
| 249 |
# unauthorized (401),
|
| 250 |
# itemNotFound (404),
|
| 251 |
# badRequest (400),
|
| 252 |
# buildInProgress (409),
|
| 253 |
# badMediaType(415),
|
| 254 |
# overLimit (413)
|
| 255 |
|
| 256 |
image = util.get_image(image_id, request.user) |
| 257 |
req = util.get_request_dict(request) |
| 258 |
try:
|
| 259 |
metadict = req['meta']
|
| 260 |
assert isinstance(metadict, dict) |
| 261 |
assert len(metadict) == 1 |
| 262 |
assert key in metadict |
| 263 |
except (KeyError, AssertionError): |
| 264 |
raise BadRequest('Malformed request.') |
| 265 |
|
| 266 |
meta, created = ImageMetadata.objects.get_or_create( |
| 267 |
meta_key=key, |
| 268 |
image=image) |
| 269 |
|
| 270 |
meta.meta_value = metadict[key] |
| 271 |
meta.save() |
| 272 |
image.save() |
| 273 |
return util.render_meta(request, meta, status=201) |
| 274 |
|
| 275 |
@util.api_method('DELETE') |
| 276 |
def delete_metadata_item(request, image_id, key): |
| 277 |
# Normal Response Code: 204
|
| 278 |
# Error Response Codes: computeFault (400, 500),
|
| 279 |
# serviceUnavailable (503),
|
| 280 |
# unauthorized (401),
|
| 281 |
# itemNotFound (404),
|
| 282 |
# badRequest (400),
|
| 283 |
# buildInProgress (409),
|
| 284 |
# badMediaType(415),
|
| 285 |
# overLimit (413),
|
| 286 |
|
| 287 |
image = util.get_image(image_id, request.user) |
| 288 |
meta = util.get_image_meta(image, key) |
| 289 |
meta.delete() |
| 290 |
image.save() |
| 291 |
return HttpResponse(status=204) |