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fix: Fix SseLineSubscriber lacking request. #507

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fix: Fix SseLineSubscriber lacking request. #507

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5 changes: 4 additions & 1 deletion mcp/src/main/java/io/modelcontextprotocol/client/transport/ResponseSubscribers.java
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Original file line number Diff line number Diff line change
Expand Up @@ -141,7 +141,6 @@ protected void hookOnSubscribe(Subscription subscription) {

@Override
protected void hookOnNext(String line) {

if (line.isEmpty()) {
// Empty line means end of event
if (this.eventBuilder.length() > 0) {
Expand All @@ -158,23 +157,27 @@ protected void hookOnNext(String line) {
if (matcher.find()) {
this.eventBuilder.append(matcher.group(1).trim()).append("\n");
}
upstream().request(1);
}
else if (line.startsWith("id:")) {
var matcher = EVENT_ID_PATTERN.matcher(line);
if (matcher.find()) {
this.currentEventId.set(matcher.group(1).trim());
}
upstream().request(1);
}
else if (line.startsWith("event:")) {
var matcher = EVENT_TYPE_PATTERN.matcher(line);
if (matcher.find()) {
this.currentEventType.set(matcher.group(1).trim());
}
upstream().request(1);
}
else if (line.startsWith(":")) {
// Ignore comment lines starting with ":"
// This is a no-op, just to skip comments
logger.debug("Ignoring comment line: {}", line);
upstream().request(1);
}
else {
// If the response is not successful, emit an error
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