From 4ed4b5bdb227ad579892f6b7a13934e48e3d0d59 Mon Sep 17 00:00:00 2001
From: Olivier Desenfans <desenfans.olivier@gmail.com>
Date: Sun, 25 Jan 2026 23:33:10 +0100
Subject: [PATCH] fix: make streaming chunk sizes consistent across filesystem
 and IPFS

---
 src/aleph/services/ipfs/service.py | 10 +++++++---
 src/aleph/storage.py               | 31 +++++-------------------------
 2 files changed, 12 insertions(+), 29 deletions(-)

diff --git a/src/aleph/services/ipfs/service.py b/src/aleph/services/ipfs/service.py
index 8f09796ec..9f8c9df98 100644
--- a/src/aleph/services/ipfs/service.py
+++ b/src/aleph/services/ipfs/service.py
@@ -20,8 +20,8 @@
 
 async def fetch_raw_cid_streamed(
     aioipfs_client: aioipfs.AsyncIPFS,
+    chunk_size: int,
     params: Optional[Dict] = None,
-    chunk_size: int = 16 * 1024,
 ) -> AsyncIterable[bytes]:
     driver = aioipfs_client.core.driver
     params = params or {}
@@ -208,10 +208,14 @@ async def get_ipfs_content(
         return result
 
     async def get_ipfs_content_iterator(
-        self, cid: str
+        self, cid: str, chunk_size: int
     ) -> Optional[AsyncIterable[bytes]]:
         params = {aioipfs.helpers.ARG_PARAM: cid}
-        return fetch_raw_cid_streamed(aioipfs_client=self.ipfs_client, params=params)
+        return fetch_raw_cid_streamed(
+            aioipfs_client=self.ipfs_client,
+            chunk_size=chunk_size,
+            params=params,
+        )
 
     async def get_json(self, hash, timeout=1, tries=1):
         result = await self.get_ipfs_content(hash, timeout=timeout, tries=tries)
diff --git a/src/aleph/storage.py b/src/aleph/storage.py
index 5e3a70f4f..f1f386ec3 100644
--- a/src/aleph/storage.py
+++ b/src/aleph/storage.py
@@ -36,6 +36,7 @@
 
 U0000_STR: Final = "\\u0000"
 U0000_BYTES: Final = U0000_STR.encode("utf-8")
+STREAM_CHUNK_SIZE: Final = 128 * 1024
 
 
 def check_for_u0000(item_content: aleph_json.SerializedJsonInput):
@@ -248,7 +249,7 @@ async def get_hash_content_iterator(
         source = None
 
         content_iterator = await self.storage_engine.read_iterator(
-            filename=content_hash
+            filename=content_hash, chunk_size=STREAM_CHUNK_SIZE
         )
         if content_iterator is not None:
             source = ContentSource.DB
@@ -259,34 +260,12 @@ async def get_hash_content_iterator(
                 ipfs_enabled = config.ipfs.enabled.value
                 if ipfs_enabled:
                     content_iterator = (
-                        await self.ipfs_service.get_ipfs_content_iterator(content_hash)
+                        await self.ipfs_service.get_ipfs_content_iterator(
+                            content_hash, chunk_size=STREAM_CHUNK_SIZE
+                        )
                     )
                     source = ContentSource.IPFS
 
-        if content_iterator is None:
-            # Fallback to non-streaming if only P2P is available or if streaming failed
-            # This is a bit suboptimal but keeps it working.
-            # However, for GET /storage/raw/ we really want streaming.
-            # If we reach here and it's not in DB/IPFS, we might have to load it from P2P and then wrap it.
-            try:
-                content = await self.get_hash_content(
-                    content_hash,
-                    engine=engine,
-                    timeout=timeout,
-                    tries=tries,
-                    use_network=use_network,
-                    use_ipfs=use_ipfs,
-                    store_value=True,
-                )
-                source = content.source
-
-                async def _iterator():
-                    yield content.value
-
-                content_iterator = _iterator()
-            except ContentCurrentlyUnavailable:
-                content_iterator = None
-
         if content_iterator is None:
             raise ContentCurrentlyUnavailable(
                 f"Could not fetch content for '{content_hash}'."