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fix(rest): support application/a2a+json content type #1181

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Merged
ehsavoie merged 2 commits into from
Sep 25, 2026
Merged

fix(rest): support application/a2a+json content type #1181

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eae33bc
fix(rest): support application/a2a+json content type
JakubWorek Sep 25, 2026
8ad8f08
refactor(rest): accept a2a+json on server but send old one
JakubWorek Sep 25, 2026
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3 changes: 3 additions & 0 deletions common/src/main/java/org/a2aproject/sdk/common/MediaType.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,4 +5,7 @@ public interface MediaType {

/** MIME type for JSON content: {@code application/json}. */
String APPLICATION_JSON = "application/json";

/** MIME type accepted from HTTP+JSON clients alongside {@code application/json}: {@code application/a2a+json}. */
String APPLICATION_A2A_JSON = "application/a2a+json";
}
8 changes: 5 additions & 3 deletions reference/rest/src/main/java/org/a2aproject/sdk/server/rest/quarkus/A2AServerRoutes.java
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@@ -1,5 +1,6 @@
package org.a2aproject.sdk.server.rest.quarkus;

import static org.a2aproject.sdk.common.MediaType.APPLICATION_A2A_JSON;
import static org.a2aproject.sdk.server.ServerCallContext.TRANSPORT_KEY;
import static org.a2aproject.sdk.spec.A2AMethods.CANCEL_TASK_METHOD;
import static org.a2aproject.sdk.spec.A2AMethods.SEND_STREAMING_MESSAGE_METHOD;
Expand Down Expand Up @@ -774,13 +775,14 @@ private String extractTenant(RoutingContext rc) {
}

/**
* Check if the request content type is application/json.
* Check if the request content type is application/json or application/a2a+json.
* @param rc the routing context
* @return true if the content type is application/json - false otherwise.
* @return true if the content type is one of those - false otherwise.
*/
private boolean validateContentType(RoutingContext rc) {
String contentType = rc.request().getHeader(CONTENT_TYPE);
if (contentType == null || !contentType.trim().startsWith(APPLICATION_JSON)) {
if (contentType == null || !(contentType.trim().startsWith(APPLICATION_JSON)
|| contentType.trim().startsWith(APPLICATION_A2A_JSON))) {
sendResponse(rc, jsonRestHandler.createErrorResponse(new ContentTypeNotSupportedError(null, null, null)));
return false;
}
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