use event-stream in decode phase instead

Signed-off-by: zhaohaidao <[email protected]>
Signed-off-by: zhaohaiyuan <[email protected]>
Signed-off-by: zhaohaidao <[email protected]>

Author: zhaohaiyuan

examples/lmcache/disagg_prefill_lmcache_v1/disagg_proxy_server.py

@@ -135,7 +135,7 @@ async def generate_stream():
                 yield chunk
 
         return StreamingResponse(generate_stream(),
-                                 media_type="application/json")
+                                 media_type="text/event-stream")
 
     except Exception as e:
         import sys
@@ -172,7 +172,7 @@ async def generate_stream():
                 yield chunk
 
         return StreamingResponse(generate_stream(),
-                                 media_type="application/json")
+                                 media_type="text/event-stream")
 
     except Exception as e:
         import sys