fallback for suggested file name and tests

lbry/extras/daemon/json_response_encoder.py

@@ -329,7 +329,7 @@ def encode_file(self, managed_stream):
                 'streaming_url': managed_stream.stream_url,
                 'stream_hash': managed_stream.stream_hash,
                 'stream_name': managed_stream.descriptor.stream_name,
-                'suggested_file_name': managed_stream.descriptor.suggested_file_name,
+                'suggested_file_name': managed_stream.suggested_file_name,
                 'sd_hash': managed_stream.descriptor.sd_hash,
                 'mime_type': managed_stream.mime_type,
                 'key': managed_stream.descriptor.key,

lbry/stream/managed_stream.py

@@ -82,7 +82,15 @@ def stream_hash(self) -> str:
 
     @property
     def file_name(self) -> Optional[str]:
-        return self._file_name or (self.descriptor.suggested_file_name if self.descriptor else None)
+        return self._file_name or self.suggested_file_name
+
+    @property
+    def suggested_file_name(self) -> Optional[str]:
+        if self.descriptor and self.descriptor.suggested_file_name and self.descriptor.suggested_file_name.strip():
+            return self.descriptor.suggested_file_name
+        elif self.stream_claim_info and self.stream_claim_info.claim:
+            return sanitize_file_name(self.stream_claim_info.claim.stream.source.name)
+        return "lbry_download"  # default replacement for invalid name. Ideally we should never get here
 
     @property
     def written_bytes(self) -> int:
@@ -116,7 +124,7 @@ def blobs_remaining(self) -> int:
 
     @property
     def mime_type(self):
-        return guess_media_type(os.path.basename(self.descriptor.suggested_file_name))[0]
+        return guess_media_type(os.path.basename(self.suggested_file_name))[0]
 
     @property
     def download_path(self):
@@ -162,7 +170,7 @@ async def start(self, timeout: Optional[float] = None,
                 if not self._file_name:
                     self._file_name = await get_next_available_file_name(
                         self.loop, self.download_directory,
-                        self._file_name or sanitize_file_name(self.descriptor.suggested_file_name)
+                        self._file_name or sanitize_file_name(self.suggested_file_name)
                     )
                 file_name, download_dir = self._file_name, self.download_directory
             else:
@@ -294,14 +302,14 @@ async def save_file(self, file_name: Optional[str] = None, download_directory: O
         self.download_directory = download_directory or self.download_directory or self.config.download_dir
         if not self.download_directory:
             raise ValueError("no directory to download to")
-        if not (file_name or self._file_name or self.descriptor.suggested_file_name):
+        if not (file_name or self._file_name or self.suggested_file_name):
             raise ValueError("no file name to download to")
         if not os.path.isdir(self.download_directory):
             log.warning("download directory '%s' does not exist, attempting to make it", self.download_directory)
             os.mkdir(self.download_directory)
         self._file_name = await get_next_available_file_name(
             self.loop, self.download_directory,
-            file_name or self._file_name or sanitize_file_name(self.descriptor.suggested_file_name)
+            file_name or self._file_name or sanitize_file_name(self.suggested_file_name)
         )
         await self.blob_manager.storage.change_file_download_dir_and_file_name(
             self.stream_hash, self.download_directory, self.file_name

tests/unit/stream/test_managed_stream.py

@@ -8,6 +8,8 @@
 from lbry.blob_exchange.server import BlobServerProtocol
 from lbry.dht.node import Node
 from lbry.dht.peer import make_kademlia_peer
+from lbry.extras.daemon.storage import StoredContentClaim
+from lbry.schema import Claim
 from lbry.stream.managed_stream import ManagedStream
 from lbry.stream.descriptor import StreamDescriptor
 from tests.unit.blob_exchange.test_transfer_blob import BlobExchangeTestBase
@@ -23,7 +25,10 @@ async def create_stream(self, blob_count: int = 10, file_name='test_file'):
         with open(file_path, 'wb') as f:
             f.write(self.stream_bytes)
         descriptor = await StreamDescriptor.create_stream(self.loop, self.server_blob_manager.blob_dir, file_path)
-        self.sd_hash = descriptor.calculate_sd_hash()
+        descriptor.suggested_file_name = file_name
+        descriptor.stream_hash = descriptor.get_stream_hash()
+        self.sd_hash = descriptor.sd_hash = descriptor.calculate_sd_hash()
+        await descriptor.make_sd_blob()
         return descriptor
 
     async def setup_stream(self, blob_count: int = 10):
@@ -47,6 +52,19 @@ async def test_client_sanitizes_file_name(self):
         self.assertEqual(self.stream.full_path, os.path.join(self.client_dir, 'tt_f'))
         self.assertTrue(os.path.isfile(os.path.join(self.client_dir, 'tt_f')))
 
+    async def test_empty_name_fallback(self):
+        descriptor = await self.create_stream(file_name=" ")
+        descriptor.suggested_file_name = " "
+        claim = Claim()
+        claim.stream.source.name = "cool.mp4"
+        self.stream = ManagedStream(
+            self.loop, self.client_config, self.client_blob_manager, self.sd_hash, self.client_dir,
+            claim=StoredContentClaim(serialized=claim.to_bytes().hex())
+        )
+        await self._test_transfer_stream(10, skip_setup=True)
+        self.assertTrue(self.stream.completed)
+        self.assertEqual(self.stream.suggested_file_name, "cool.mp4")
+
     async def test_status_file_completed(self):
         await self._test_transfer_stream(10)
         self.assertTrue(self.stream.output_file_exists)