Upload to non-existent place.

src/allmydata/storage/http_server.py

@@ -250,8 +250,8 @@ class HTTPServer(object):
         try:
             bucket = self._uploads[storage_index].shares[share_number]
         except (KeyError, IndexError):
-            # TODO return 404
+            request.setResponseCode(http.NOT_FOUND)
-            raise
+            return b""
 
         finished = bucket.write(offset, data)
 

src/allmydata/test/test_storage_http.py

@@ -583,6 +583,39 @@ class ImmutableHTTPAPITests(SyncTestCase):
         storage_index = b"".join(bytes([i]) for i in range(16))
         self.assertEqual(result_of(im_client.list_shares(storage_index)), set())
 
+    def test_upload_non_existent_storage_index(self):
+        """
+        Uploading to a non-existent storage index or share number results in
+        404.
+        """
+        im_client = StorageClientImmutables(self.http.client)
+        upload_secret = urandom(32)
+        lease_secret = urandom(32)
+        storage_index = b"".join(bytes([i]) for i in range(16))
+        result_of(
+            im_client.create(
+                storage_index, {1}, 10, upload_secret, lease_secret, lease_secret
+            )
+        )
+
+        def unknown_check(storage_index, share_number):
+            with self.assertRaises(ClientException) as e:
+                result_of(
+                    im_client.write_share_chunk(
+                        storage_index,
+                        share_number,
+                        upload_secret,
+                        0,
+                        b"0123456789",
+                    )
+                )
+            self.assertEqual(e.exception.code, http.NOT_FOUND)
+
+        # Wrong share number:
+        unknown_check(storage_index, 7)
+        # Wrong storage index:
+        unknown_check(b"X" * 16, 7)
+
     def test_multiple_shares_uploaded_to_different_place(self):
         """
         If a storage index has multiple shares, uploads to different shares are