implement share API by item_id

+# Generated by Django 3.0.6 on 2020-06-06 08:17
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0002_auto_20200605_1851'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='shareditem',
+            old_name='valid',
+            new_name='expires',
+        ),
+    ]

+# Generated by Django 3.0.6 on 2020-06-06 08:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0003_auto_20200606_0817'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='shareditem',
+            name='created_time',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AddField(
+            model_name='user',
+            name='created_time',
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AlterField(
+            model_name='item',
+            name='created_time',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]

@@ -11,7 +11,7 @@ class Item(models.Model):
     user_id = models.IntegerField()
     size = models.IntegerField()
     is_deleted = models.BooleanField(default = False)
-    created_time = models.DateTimeField(blank = False)
+    created_time = models.DateTimeField(auto_now=True)
     updated_time = models.DateTimeField()
     status = models.BooleanField()
 
@@ -24,9 +24,9 @@ class Item(models.Model):
 class SharedItem(models.Model):
     item_id = models.IntegerField()
     #file_id?
-    valid = models.DateTimeField()
+    expires = models.DateTimeField()
     password = models.CharField(max_length = 20)
-
+    created_time = models.DateTimeField(auto_now=True)
     class Meta:
         ordering = ['item_id']
 
@@ -38,6 +38,6 @@ class User(models.Model):
     password = models.CharField(max_length = 20)
     total_size = models.IntegerField()
     current_size = models.IntegerField()
-
+    created_time = models.DateTimeField(auto_now=True)
     class Meta:
         ordering = ['int_id']

@@ -5,11 +5,9 @@ import boto3
 
 from django.contrib.auth.models import User
 from django.core import serializers
-from django.http import HttpResponse, JsonResponse
+from django.views.decorators.csrf import csrf_exempt
 from rest_framework import viewsets
 from rest_framework import permissions
-from django.views.decorators.csrf import csrf_exempt
-from rest_framework import renderers
 from rest_framework.views import APIView
 from rest_framework.response import Response
 from rest_framework.decorators import action
@@ -17,9 +15,10 @@ from rest_framework.parsers import JSONParser
 from rest_framework.permissions import IsAuthenticated, AllowAny
 
 from api.models import Item, SharedItem
-from api.serializers import UserSerializer,GroupSerializer,ItemSerializer
+from api.serializers import UserSerializer,GroupSerializer,ItemSerializer,SharedItemSerializer
 from rest_framework import generics
 from rest_framework import status
+from annoying.functions import get_object_or_None
 
 class UserViewSet(viewsets.ModelViewSet):
     """
@@ -37,48 +36,6 @@ class ItemViewSet(viewsets.ModelViewSet):
     permission_classes = [permissions.IsAuthenticatedOrReadOnly, permissions.AllowAny,
                           #IsOwnerOrReadOnly
                           ]
-    # url: /upload
-    @action(methods=['POST'], detail=True, permission_classes=[AllowAny],
-            url_path='upload', url_name='upload')
-    def upload(self, request, pk):
-        if request.method == 'POST':
-            s3 = boto3.client('s3')
-            #s3_bucket = os.environ.get('AWS_STORAGE_BUCKET_NAME')
-            s3_bucket = 'arn:aws:s3:::[s3id]'
-            #file_name = request.GET['image_name']
-            file_name = request.GET.get('image_name', '')
-            file_type = mimetypes.guess_type(file_name)[0]
-            presigned_post = s3.generate_presigned_post(
-                Bucket=s3_bucket,
-                Key=file_name,
-                Fields={"acl": "private", "Content-Type": file_type},
-                Conditions=[
-                    {"acl": "public-read"},
-                    {"Content-Type": file_type}
-                ],
-                ExpiresIn=3600
-            )
-
-            data = {
-                "signed_url": presigned_post,
-                'url': 'https://%s.s3.amazonaws.com/%s' % (s3_bucket, file_name)
-            }
-            return presigned_post['url']
-
-    # url: /status
-    @action(methods=['POST'], detail=True, permission_classes=[AllowAny],
-                     url_path='status', url_name='status')
-    def status(self, request):
-        if request.method == 'POST':
-            #name = request.POST['name']
-            name = request.POST.get('name', '')
-            up_time = request.POST.get('updated_time', '')
-            try:
-                item = Item.objects.get(name=name, updated_time=up_time)
-            except Item.DoesNotExist:
-                return Response({'Error': 'File Upload Error'}, status=status.HTTP_200_OK)
-            return Response({'Message': 'File Upload Successful'}, status=status.HTTP_200_OK)
-
 
     # url: items/search
     @action(methods=['GET'], detail=False, permission_classes=[AllowAny], url_path='search', url_name='search')
@@ -90,3 +47,33 @@ class ItemViewSet(viewsets.ModelViewSet):
             data = serializers.serialize("json", item_list)
             return Response({'data': {'list' : data}}, status=status.HTTP_200_OK)
 
+class SharedItemViewSet(viewsets.ModelViewSet):
+
+    queryset = SharedItem.objects.all()
+    serializer_class = SharedItemSerializer
+    permission_classes = [permissions.IsAuthenticatedOrReadOnly, permissions.AllowAny,
+                          # IsOwnerOrReadOnly
+                          ]
+    # url: http://localhost:8000/items/1/share/
+    # 마지막 slash도 써주어야함
+    @csrf_exempt
+    @action(methods=['POST'], detail=True, permission_classes=[AllowAny], url_path='share', url_name='share')
+    def share(self, request, pk):
+        if request.method == 'POST':
+            password = request.POST.get('password', '')
+            expires = request.POST.get('expires', '')
+
+            sharedfile = get_object_or_None(SharedItem, item_id=pk)
+            if sharedfile != None:
+                # 서버는 정상이나 이미 공유객체로 등록된 파일임
+                return Response({'Message': 'This file is already shared'}, status=status.HTTP_200_OK)
+            sharedfile = SharedItem(item_id =pk, password=password, expires = expires)
+            sharedfile.save()
+            sharedfile = SharedItem.objects.get(item_id = pk)
+
+            # sf = serializers.serialize("json", sharedfile)
+            item = Item.objects.filter(item_id = pk)
+            item_json = serializers.serialize("json", item)
+
+            # data = serializers.serialize("json", item_list)
+            return Response({"shared": sharedfile.created_time , 'data': item_json}, status=status.HTTP_200_OK)
\ No newline at end of file

@@ -22,14 +22,14 @@ from django.conf.urls import url
 router = routers.DefaultRouter()
 router.register(r'users', views.UserViewSet)
 router.register(r'items', views.ItemViewSet)
+router.register(r'items', views.SharedItemViewSet)
 
 # Wire up our API using automatic URL routing.
 # Additionally, we include login URLs for the browsable API.
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('', include(router.urls)),
-    url(r'^upload/$', views.ItemViewSet.upload, name='upload'),
-    url(r'^status/$', views.ItemViewSet.status, name='status'),
     url(r'^search/$', views.ItemViewSet.search, name='search'),
+    url(r'^<int:pk>/share/$', views.SharedItemViewSet.share, name='share'),
 
 ]