Fixed #24072 -- Added FileResponse for streaming binary files.

1 files changed, 19 insertions, 0 deletions

diff --git a/django/http/response.py b/django/http/response.py
index 2735e3c59d..5168834b23 100644
--- a/django/http/response.py
+++ b/django/http/response.py
@@ -417,6 +417,9 @@ class StreamingHttpResponse(HttpResponseBase):
 
     @streaming_content.setter
     def streaming_content(self, value):
+        self._set_streaming_content(value)
+
+    def _set_streaming_content(self, value):
         # Ensure we can never iterate on "value" more than once.
         self._iterator = iter(value)
         if hasattr(value, 'close'):
@@ -429,6 +432,22 @@ class StreamingHttpResponse(HttpResponseBase):
         return b''.join(self.streaming_content)
 
 
+class FileResponse(StreamingHttpResponse):
+    """
+    A streaming HTTP response class optimized for files.
+    """
+    block_size = 4096
+
+    def _set_streaming_content(self, value):
+        if hasattr(value, 'read'):
+            self.file_to_stream = value
+            filelike = value
+            value = iter(lambda: filelike.read(self.block_size), b'')
+        else:
+            self.file_to_stream = None
+        super(FileResponse, self)._set_streaming_content(value)
+
+
 class HttpResponseRedirectBase(HttpResponse):
     allowed_schemes = ['http', 'https', 'ftp']