Ch"*SrSSKrSSKJr SSKJr SSKJr SSKJ r J r SSK r SSK J r Jr SSKJr SS KJr SS KJr SS KJr SS KJrJrJr SSKJr SS KJrJr SSK J!r!J"r" \RF"\$5r%"SS5r&g)a SSE Server Transport Module This module implements a Server-Sent Events (SSE) transport layer for MCP servers. Example usage: ``` # Create an SSE transport at an endpoint sse = SseServerTransport("/messages/") # Create Starlette routes for SSE and message handling routes = [ Route("/sse", endpoint=handle_sse, methods=["GET"]), Mount("/messages/", app=sse.handle_post_message), ] # Define handler functions async def handle_sse(request): async with sse.connect_sse( request.scope, request.receive, request._send ) as streams: await app.run( streams[0], streams[1], app.create_initialization_options() ) # Return empty response to avoid NoneType error return Response() # Create and run Starlette app starlette_app = Starlette(routes=routes) uvicorn.run(starlette_app, host="127.0.0.1", port=port) ``` Note: The handle_sse function must return a Response to avoid a "TypeError: 'NoneType' object is not callable" error when client disconnects. The example above returns an empty Response() after the SSE connection ends to fix this. See SseServerTransport class documentation for more details. N)asynccontextmanager)Any)quote)UUIDuuid4)MemoryObjectReceiveStreamMemoryObjectSendStream)ValidationError)EventSourceResponse)Request)Response)ReceiveScopeSend)TransportSecurityMiddlewareTransportSecuritySettings)ServerMessageMetadataSessionMessagec^\rSrSr%Sr\\S'\\\ \ \ -4\S'\ \S'SS\S\ S-S S4U4S jjjr\S \S \S \4Sj5rS \S \S \S S4SjrSrU=r$)SseServerTransport@a SSE server transport for MCP. This class provides _two_ ASGI applications, suitable to be used with a framework like Starlette and a server like Hypercorn: 1. connect_sse() is an ASGI application which receives incoming GET requests, and sets up a new SSE stream to send server messages to the client. 2. handle_post_message() is an ASGI application which receives incoming POST requests, which should contain client messages that link to a previously-established SSE session. _endpoint_read_stream_writers _securityNendpointsecurity_settingsreturnc0>[TU]5 SU;d"URS5(d SU;dSU;a[SUS35eURS5(dSU-nXl0Ul[ U5Ul[RSU35 g ) a? Creates a new SSE server transport, which will direct the client to POST messages to the relative path given. Args: endpoint: A relative path where messages should be posted (e.g., "/messages/"). security_settings: Optional security settings for DNS rebinding protection. Note: We use relative paths instead of full URLs for several reasons: 1. Security: Prevents cross-origin requests by ensuring clients only connect to the same origin they established the SSE connection with 2. Flexibility: The server can be mounted at any path without needing to know its full URL 3. Portability: The same endpoint configuration works across different environments (development, staging, production) Raises: ValueError: If the endpoint is a full URL instead of a relative path z://z//?#zGiven endpoint: z] is not a relative path (e.g., '/messages/'), expecting a relative path (e.g., '/messages/')./z.SseServerTransport initialized with endpoint: N) super__init__ startswith ValueErrorrrrrloggerdebug)selfrr __class__s H/home/james-whalen/.local/lib/python3.13/site-packages/mcp/server/sse.pyr#SseServerTransport.__init__Ps.  H  3 3D 9 9SH_PSW_P_"8*-BB  ""3''X~H!$&!45FG EhZPQscopereceivesendc^^ ^ ^^^^^# USS:wa [RS5 [S5e[X5nURR USS9IShvN nU(aU"XU5IShvN [S5e[R S5 [R"S 5um n[R"S 5unm[5mT URT'[R S T35 URS S 5nURS 5UR-n [U 5STR3m [R[ ["[$4"S 5ummU UU4Sjm[R&"5IShvN n S[(S[*S[,4U UUUU4Sjjn [R S5 U R/XX#5 [R S5 Xg47v SSS5IShvN gGNGNN{N !,IShvN (df  g=f7f)Ntypehttpz%connect_sse received non-HTTP requestz)connect_sse can only handle HTTP requestsFis_postzRequest validation failedzSetting up SSE connectionrzCreated new session with ID: root_pathr!z ?session_id=c B># [RS5 TIShvN TIShvN TRSTS.5IShvN [RST35 TShvN n[RSU35 TRSURR SSS9S.5IShvN MWNNNyNXN SSS5IShvN O!,IShvN (df  O=fSSS5IShvN g!,IShvN (df  g=f7f) NzStarting SSE writerr)eventdatazSent endpoint event: zSending message via SSE: messageT)by_alias exclude_none)r&r'r/r:model_dump_json)session_messageclient_post_uri_datasse_stream_writerwrite_stream_readers r* sse_writer2SseServerTransport.connect_sse..sse_writers LL. /((*=*=',,zK_-`aaa 45I4JKL-@/LL#<_*=*=*=*=*=((((((sDB<DDB>DCCC%C)C *C-AC5C 6C<D>DCCCC DCDC0 C" C0 ,D3 D>D?DD D DDr-r.r/c># [TTS9"XU5IShvN TR5IShvN TR5IShvN [R"ST35 gNNN8N"7f)z The EventSourceResponse returning signals a client close / disconnect. In this case we close our side of the streams to signal the client that the connection has been closed. )contentdata_sender_callableNzClient session disconnected )r acloseloggingr')r-r.r/read_stream_writer session_idsse_stream_readerrBrAs r*response_wrapper8SseServerTransport.connect_sse..response_wrapperso *2CZdeD)//111)00222 >wPU>VV  6 6 689 9 01+0*K*KA*N'K,1,M,Ma,P) )W 0B!!*- 4ZLAB IIk2. (1'7'7's r*handle_post_message&SseServerTransport.handle_post_messagesg ,-%) $~~>>wPT>UU '== ="//33LA  # NN@ A 8cJH!%$77 7 8"23J LL.zl; < **..z: NN>tDG LL5gY? @)A(D :?:KLMJC8ut,,,kk/***WV= 8  8 NN:;K:LM N 4#FH!%$777 7 88#     6 7 9sKH540 0 0++c" " "    -*s>J"G)J"G,A J"&G/'J",!G2 AJ"H6J"5H96J"7H< AJ" J J"#J $J",J"/J"28H3*H-+H30J"2H33J"9J"< J+J1I42J J JJ"JJ" J")rrr)N)__name__ __module__ __qualname____firstlineno____doc__rV__annotations__rUrr r Exceptionrrr#rrrrr_rr__static_attributes__ __classcell__)r)s@r*rr@s Nt%;NYrs^%N* R$-&(00E   8 $y+y+r,