Update proxy.py

proxy.py

@@ -14,13 +14,13 @@ def home():
 def render():
     src = request.args.get("src", "")
     r = requests.get(PLANTUML_URL + "/render", params={"src": src}, stream=True)
-    return Response(r.content, content_type=r.headers.get("content-type"))
+    return Response(r.content, mimetype=r.headers.get("Content-Type"))
 
 @app.route("/render/svg")
 def render_svg():
     src = request.args.get("src", "")
     r = requests.get(PLANTUML_URL + "/render/svg", params={"src": src}, stream=True)
-    return Response(r.content, content_type=r.headers.get("content-type"))
+    return Response(r.content, mimetype=r.headers.get("Content-Type"))
 
 if __name__ == "__main__":
     app.run(host="0.0.0.0", port=7860)