diff --git a/changelog.d/7044.bugfix b/changelog.d/7044.bugfix
new file mode 100644
index 0000000000..790088ddb4
--- /dev/null
+++ b/changelog.d/7044.bugfix
@@ -0,0 +1 @@
+Fix a bug that renders UTF-8 text files incorrectly when loaded from media. Contributed by @TheStranjer.
diff --git a/synapse/rest/media/v1/_base.py b/synapse/rest/media/v1/_base.py
index ba28dd089d..503f2bed98 100644
--- a/synapse/rest/media/v1/_base.py
+++ b/synapse/rest/media/v1/_base.py
@@ -30,6 +30,22 @@ from synapse.util.stringutils import is_ascii
logger = logging.getLogger(__name__)
+# list all text content types that will have the charset default to UTF-8 when
+# none is given
+TEXT_CONTENT_TYPES = [
+ "text/css",
+ "text/csv",
+ "text/html",
+ "text/calendar",
+ "text/plain",
+ "text/javascript",
+ "application/json",
+ "application/ld+json",
+ "application/rtf",
+ "image/svg+xml",
+ "text/xml",
+]
+
def parse_media_id(request):
try:
@@ -96,7 +112,14 @@ def add_file_headers(request, media_type, file_size, upload_name):
def _quote(x):
return urllib.parse.quote(x.encode("utf-8"))
- request.setHeader(b"Content-Type", media_type.encode("UTF-8"))
+ # Default to a UTF-8 charset for text content types.
+ # ex, uses UTF-8 for 'text/css' but not 'text/css; charset=UTF-16'
+ if media_type.lower() in TEXT_CONTENT_TYPES:
+ content_type = media_type + "; charset=UTF-8"
+ else:
+ content_type = media_type
+
+ request.setHeader(b"Content-Type", content_type.encode("UTF-8"))
if upload_name:
# RFC6266 section 4.1 [1] defines both `filename` and `filename*`.
#
|
