Add content-type support

Author: ecarreras

minio_backend/fields.py

@@ -4,6 +4,7 @@
 import base64
 from io import BytesIO
 from .minio_backend import get_minio_client
+import magic
 
 
 class S3File(fields.text):
@@ -55,8 +56,12 @@ def set(self, cursor, obj, rid, name, value, user=None, context=None):
 
                 content = base64.b64decode(value)
                 length = len(content)
+                content_type = magic.from_buffer(content, mime=True)
                 content = BytesIO(content)
-                client.put_object(self.bucket, filename, content, length=length)
+                client.put_object(
+                    self.bucket, filename, content, length=length,
+                    content_type=content_type
+                )
                 value = filename
             return super(S3File, self).set(
                 cursor, obj, rid, name, value, user, context

minio_backend/requirements.txt

@@ -1 +1,2 @@
-minio<7.0.0
+minio<7.0.0
+python-magic