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-rw-r--r--src/couchdb/couch_db.erl7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/couchdb/couch_db.erl b/src/couchdb/couch_db.erl
index 40d84618..17402c81 100644
--- a/src/couchdb/couch_db.erl
+++ b/src/couchdb/couch_db.erl
@@ -923,10 +923,15 @@ with_stream(Fd, #att{md5=InMd5,type=Type,encoding=Enc}=Att, Fun) ->
write_streamed_attachment(_Stream, _F, 0) ->
ok;
write_streamed_attachment(Stream, F, LenLeft) when LenLeft > 0 ->
- Bin = F(),
+ Bin = read_next_chunk(F, LenLeft),
ok = couch_stream:write(Stream, Bin),
write_streamed_attachment(Stream, F, LenLeft - size(Bin)).
+read_next_chunk(F, _) when is_function(F, 0) ->
+ F();
+read_next_chunk(F, LenLeft) when is_function(F, 1) ->
+ F(lists:min([LenLeft, 16#2000])).
+
enum_docs_since_reduce_to_count(Reds) ->
couch_btree:final_reduce(
fun couch_db_updater:btree_by_seq_reduce/2, Reds).