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fix: When call the MCP SSE endpoint, the Content-Type header not passed by default (#489)

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shaoyin.zj 2025-08-26 13:51:07 +08:00 • committed by Christian Tzolov
commit 1e29adefb0
1 changed files with 2 additions and 2 deletions
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4
mcp/src/main/java/io/modelcontextprotocol/client/transport/HttpClientSseClientTransport.java
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@ -244,8 +244,7 @@ public class HttpClientSseClientTransport implements McpClientTransport {
private ObjectMapper objectMapper = new ObjectMapper(); private ObjectMapper objectMapper = new ObjectMapper();
private HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() private HttpRequest.Builder requestBuilder = HttpRequest.newBuilder();
.header("Content-Type", "application/json");
private AsyncHttpRequestCustomizer httpRequestCustomizer = AsyncHttpRequestCustomizer.NOOP; private AsyncHttpRequestCustomizer httpRequestCustomizer = AsyncHttpRequestCustomizer.NOOP;
@ -540,6 +539,7 @@ public class HttpClientSseClientTransport implements McpClientTransport {
return Mono.defer(() -> { return Mono.defer(() -> {
var builder = this.requestBuilder.copy() var builder = this.requestBuilder.copy()
.uri(requestUri) .uri(requestUri)
.header("Content-Type", "application/json")
.header(MCP_PROTOCOL_VERSION_HEADER_NAME, MCP_PROTOCOL_VERSION) .header(MCP_PROTOCOL_VERSION_HEADER_NAME, MCP_PROTOCOL_VERSION)
.POST(HttpRequest.BodyPublishers.ofString(body)); .POST(HttpRequest.BodyPublishers.ofString(body));
return Mono.from(this.httpRequestCustomizer.customize(builder, "POST", requestUri, body)); return Mono.from(this.httpRequestCustomizer.customize(builder, "POST", requestUri, body));