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fix(ios): accept application/a2ui+json in A2AResponseParser #208

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Merged
lansana merged 1 commit into from
Oct 20, 2026
Merged

fix(ios): accept application/a2ui+json in A2AResponseParser #208

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3 changes: 2 additions & 1 deletion client/ios/GoogleMapsA2UI/Sources/GoogleMapsA2UI/A2AResponseParser.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ public enum A2AParserError: Error {
/// Declared as a case-less enum to prevent instantiation.
public enum A2AResponseParser {
private static let a2uiJsonMimeType = "application/json+a2ui"
private static let a2uiV1MimeType = "application/a2ui+json"
private static let a2uiJsonTagOpen = "<a2ui-json>"
private static let a2uiJsonTagClose = "</a2ui-json>"

Expand Down Expand Up @@ -94,7 +95,7 @@ public enum A2AResponseParser {
mimeType
?? (isA2UIPayload(dataPayload) ? a2uiJsonMimeType : nil)

if resolvedMimeType == a2uiJsonMimeType {
if resolvedMimeType == a2uiJsonMimeType || resolvedMimeType == a2uiV1MimeType {
a2uiPayloads.append(dataPayload)
} else {
flushA2UI()
Expand Down
26 changes: 26 additions & 0 deletions client/ios/GoogleMapsA2UI/Tests/A2AResponseParserTests.swift
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Expand Up @@ -187,6 +187,32 @@ final class A2AResponseParserTests: XCTestCase {
XCTAssertEqual(a2uiArray.count, 1)
}

/// Tests that a data part with the standard `application/a2ui+json` mime type is parsed and batched into an array.
func testParse_dataPartWithStandardA2UIMimeType() throws {
let payload: [String: Any] = [
"parts": [
[
"kind": "data",
"data": [
"version": "v0.9",
"updateComponents": [
"surfaceId": "sushi-seattle",
"components": [],
],
],
"metadata": ["mimeType": "application/a2ui+json"],
]
]
]

let events = try A2AResponseParser.parse(payload)
XCTAssertEqual(events.count, 1)
XCTAssertEqual(events.first?.metadataMimeType, "application/json+a2ui")

let a2uiArray = try XCTUnwrap(events.first?.dataArray)
XCTAssertEqual(a2uiArray.count, 1)
}

/// Tests that a data part is inferred as A2UI if it contains recognized keys, even without a mime type.
func testParse_dataPartWithImplicitA2UIKey() throws {
let payload: [String: Any] = [
Expand Down
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