Stateless server transport shouldn't require TEXT_EVENT_STREAM

Signed-off-by: Yanming Zhou <zhouyanming@gmail.com>

Author: quaff

mcp-spring/mcp-spring-webflux/src/main/java/io/modelcontextprotocol/server/transport/WebFluxStatelessServerTransport.java

@@ -30,6 +30,7 @@
  * Implementation of a WebFlux based {@link McpStatelessServerTransport}.
  *
  * @author Dariusz Jędrzejczyk
+ * @author Yanming Zhou
  */
 public class WebFluxStatelessServerTransport implements McpStatelessServerTransport {
 
@@ -100,8 +101,7 @@ private Mono<ServerResponse> handlePost(ServerRequest request) {
 		McpTransportContext transportContext = this.contextExtractor.extract(request, new DefaultMcpTransportContext());
 
 		List<MediaType> acceptHeaders = request.headers().asHttpHeaders().getAccept();
-		if (!(acceptHeaders.contains(MediaType.APPLICATION_JSON)
-				&& acceptHeaders.contains(MediaType.TEXT_EVENT_STREAM))) {
+		if (!acceptHeaders.contains(MediaType.APPLICATION_JSON)) {
 			return ServerResponse.badRequest().build();
 		}
 

mcp-spring/mcp-spring-webmvc/src/main/java/io/modelcontextprotocol/server/transport/WebMvcStatelessServerTransport.java

@@ -34,6 +34,7 @@
  * {@link io.modelcontextprotocol.server.transport.WebFluxStatelessServerTransport}
  *
  * @author Christian Tzolov
+ * @author Yanming Zhou
  */
 public class WebMvcStatelessServerTransport implements McpStatelessServerTransport {
 
@@ -104,8 +105,7 @@ private ServerResponse handlePost(ServerRequest request) {
 		McpTransportContext transportContext = this.contextExtractor.extract(request, new DefaultMcpTransportContext());
 
 		List<MediaType> acceptHeaders = request.headers().asHttpHeaders().getAccept();
-		if (!(acceptHeaders.contains(MediaType.APPLICATION_JSON)
-				&& acceptHeaders.contains(MediaType.TEXT_EVENT_STREAM))) {
+		if (!acceptHeaders.contains(MediaType.APPLICATION_JSON)) {
 			return ServerResponse.badRequest().build();
 		}
 

mcp/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStatelessServerTransport.java

@@ -33,6 +33,7 @@
  *
  * @author Christian Tzolov
  * @author Dariusz Jędrzejczyk
+ * @author Yanming Zhou
  */
 @WebServlet(asyncSupported = true)
 public class HttpServletStatelessServerTransport extends HttpServlet implements McpStatelessServerTransport {
@@ -126,9 +127,9 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
 		McpTransportContext transportContext = this.contextExtractor.extract(request, new DefaultMcpTransportContext());
 
 		String accept = request.getHeader(ACCEPT);
-		if (accept == null || !(accept.contains(APPLICATION_JSON) && accept.contains(TEXT_EVENT_STREAM))) {
+		if (accept == null || !accept.contains(APPLICATION_JSON)) {
 			this.responseError(response, HttpServletResponse.SC_BAD_REQUEST,
-					new McpError("Both application/json and text/event-stream required in Accept header"));
+					new McpError("application/json required in Accept header"));
 			return;
 		}