Added GET request handler, command for key generation. Changed KeyPair format for ecdsa (use to_string instead of to_pem because it's shorter)

boards/management/commands/generate_keypair.py

@@ -0,0 +1,17 b''
+__author__ = 'neko259'
+
+
+from django.core.management import BaseCommand
+from django.db import transaction
+
+from boards.models import KeyPair
+
+
+class Command(BaseCommand):
+    help = 'Generates the new keypair. The first one will be primary.'
+
+    @transaction.atomic
+    def handle(self, *args, **options):
+        key = KeyPair.objects.generate_key(
+            primary=not KeyPair.objects.has_primary())
+        print(key)
  No newline at end of file

boards/tests/test_sync.py

@@ -0,0 +1,55 b''
+from boards.models import KeyPair, Post
+from boards.tests.mocks import MockRequest
+from boards.views.sync import respond_get
+
+__author__ = 'neko259'
+
+
+from django.test import TestCase
+
+
+class SyncTest(TestCase):
+    def test_get(self):
+        """
+        Forms a GET request of a post and checks the response.
+        """
+
+        key = KeyPair(public_key='pubkey', private_key='privkey',
+                      key_type='test_key_type', primary=True)
+        key.save()
+
+        post = Post.objects.create_post(title='test_title', text='test_text')
+
+        request = MockRequest()
+        request.POST['xml'] = (
+            '<request type="get" version="1.0">'
+            '<model name="post" version="1.0">'
+            '<id key="%s" local-id="%d" type="%s" />'
+            '</model>'
+            '</request>' % (post.global_id.key,
+                            post.id,
+                            post.global_id.key_type)
+        )
+
+        self.assertTrue(
+            '<response>'
+            '<status>success</status>'
+            '<models>'
+            '<model name="post" ref-id="1">'
+            '<id key="%s" local-id="%d" type="%s" />'
+            '<title>%s</title>'
+            '<text>%s</text>'
+            '<pub-time>%d</pub-time>'
+            '<edit-time>%d</edit-time>'
+            '</model>'
+            '</models>'
+            '</response>' % (
+                post.global_id.key,
+                post.id,
+                post.global_id.key_type,
+                post.title,
+                post.text.raw,
+                post.get_pub_time_epoch(),
+                post.get_edit_time_epoch(),
+            ) in respond_get(request).content.decode(),
+            'Wrong response generated for the GET request.')
  No newline at end of file

boards/models/signature.py

@@ -24,9 +24,9 b' class GlobalId(models.Model):'
     local_id = models.IntegerField()
 
     def __str__(self):
-        return '%s / %s / %d' % (self.key_type, self.key, self.local_id)
+        return '%s | %s | %d' % (self.key_type, self.key, self.local_id)
 
-    def to_xml_element(self, element: et.SubElement):
+    def to_xml_element(self, element: et.Element):
         """
         Exports global id to an XML element.
         """
@@ -35,6 +35,28 b' class GlobalId(models.Model):'
         element.set(ATTR_KEY_TYPE, self.key_type)
         element.set(ATTR_LOCAL_ID, str(self.local_id))
 
+    @staticmethod
+    def from_xml_element(element: et.Element, existing=False):
+        """
+        Parses XML id tag and gets global id from it.
+
+        Arguments:
+        element -- the XML 'id' element
+        existing -- if this is False, a new instance of GlobalId will be
+         created. Otherwise, we will search for an existing GlobalId instance
+         and throw DoesNotExist if there isn't one.
+        """
+
+        if existing:
+            return GlobalId.objects.get(key=element.get(ATTR_KEY),
+                                        key_type=element.get(ATTR_KEY_TYPE),
+                                        local_id=int(element.get(
+                                            ATTR_LOCAL_ID)))
+        else:
+            return GlobalId(key=element.get(ATTR_KEY),
+                            key_type=element.get(ATTR_KEY_TYPE),
+                            local_id=int(element.get(ATTR_LOCAL_ID)))
+
 
 class Signature(models.Model):
     class Meta:

boards/models/sync_key.py

@@ -16,8 +16,8 b' class KeyPairManager(models.Manager):'
             private = SigningKey.generate()
             public = private.get_verifying_key()
 
-            private_key_str = private.to_pem().decode()
-            public_key_str = public.to_pem().decode()
+            private_key_str = base64.b64encode(private.to_string()).decode()
+            public_key_str = base64.b64encode(public.to_string()).decode()
 
             return self.create(public_key=public_key_str,
                                private_key=private_key_str,
@@ -27,7 +27,7 b' class KeyPairManager(models.Manager):'
 
     def verify(self, public_key_str, string, signature, key_type=TYPE_ECDSA):
         if key_type == TYPE_ECDSA:
-            public = VerifyingKey.from_pem(public_key_str)
+            public = VerifyingKey.from_string(base64.b64decode(public_key_str))
             signature_byte = base64.b64decode(signature)
             try:
                 return public.verify(signature_byte, string.encode())
@@ -36,6 +36,9 b' class KeyPairManager(models.Manager):'
         else:
             raise Exception('Key type not supported')
 
+    def has_primary(self):
+        return self.filter(primary=True).exists()
+
 
 class KeyPair(models.Model):
     class Meta:
@@ -49,9 +52,10 b' class KeyPair(models.Model):'
     primary = models.BooleanField(default=False)
 
     def __str__(self):
-        return '%s: %s' % (self.key_type, self.public_key)
+        return '%s | %s' % (self.key_type, self.public_key)
 
     def sign(self, string):
-        private = SigningKey.from_pem(self.private_key)
+        private = SigningKey.from_string(base64.b64decode(
+            self.private_key.encode()))
         signature_byte = private.sign(string.encode())
         return base64.b64encode(signature_byte)

boards/templates/boards/post.html

@@ -35,7 +35,7 b''
             {% endif %}
 
             {% if post.global_id %}
-                <span class="global-id">{{ post.global_id.key_type }} / {{ post.global_id.key }} / {{ post.global_id.local_id }}</span>
+                <span class="global-id"> {{ post.global_id }} </span>
             {% endif %}
 
             {% if moderator %}

boards/views/sync.py

@@ -1,6 +1,33 b''
+import xml.etree.ElementTree as et
+from django.http import HttpResponse
+from boards.models import GlobalId, Post
+
+
 def respond_pull(request):
     pass
 
 
 def respond_get(request):
-    pass
+    """
+    Processes a GET request with post ID list and returns the posts XML list.
+    Request should contain an 'xml' post attribute with the actual request XML.
+    """
+
+    request_xml = request.POST['xml']
+
+    posts = []
+
+    root_tag = et.fromstring(request_xml)
+    model_tag = root_tag[0]
+    for id_tag in model_tag:
+        try:
+            global_id = GlobalId.from_xml_element(id_tag, existing=True)
+            posts += Post.objects.filter(global_id=global_id)
+        except GlobalId.DoesNotExist:
+            # This is normal. If we don't have such GlobalId in the system,
+            # just ignore this ID and proceed to the next one.
+            pass
+
+    response_xml = Post.objects.generate_response_get(posts)
+
+    return HttpResponse(content=response_xml)
  No newline at end of file