He-Pin commented on code in PR #744:
URL: https://github.com/apache/pekko-http/pull/744#discussion_r2326556854
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docs/src/main/paradox/common/sse-support.md:
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@@ -56,6 +56,49 @@ Scala
Java
: @@snip
[EventStreamMarshallingTest.java](/http-tests/src/test/java/org/apache/pekko/http/javadsl/unmarshalling/sse/EventStreamUnmarshallingTest.java)
{ #event-stream-unmarshalling-example }
+## Configuration
+
+Apache Pekko HTTP provides several configuration options for Server-Sent
Events handling:
+
+### Message Size Limits
+
+The SSE client parser has configurable limits to handle various message sizes:
+
+```hocon
+pekko.http.sse {
+ # The maximum size for parsing received server-sent events.
+ # This value must be larger than `max-line-size`. Set to 0 to disable limit
entirely (unlimited).
+ max-event-size = 115713
+
+ # The maximum size for parsing received lines of a server-sent event. Set to
0 to disable limit entirely (unlimited).
+ max-line-size = 115712
+}
+```
+
+### Oversized Message Handling
+
+When SSE messages exceed the configured `max-line-size`, Apache Pekko HTTP
provides four handling strategies:
+
+- **fail-stream** (default): Fails the stream with a clear error message,
maintaining backward compatibility
+- **log-and-skip**: Logs a warning and skips the oversized message, continuing
stream processing
+- **truncate**: Logs a warning and truncates the message to the configured
limit, continuing processing
+- **dead-letter**: Logs a warning and sends the oversized message to the dead
letter queue, continuing processing
+
+```hocon
+pekko.http.sse {
+ # How to handle messages that exceed max-line-size limit
+ # Options:
+ # "fail-stream" - Fail the stream with a clear error message (default)
+ # "log-and-skip" - Log a warning and skip the oversized message
+ # "truncate" - Log a warning and truncate the message to max-line-size
+ # "dead-letter" - Log a warning, send oversized message to dead letters
+ oversized-message-handling = "fail-stream"
Review Comment:
if the dead leatter can not be consumed fast , may be an oom？
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