package envoy.extensions.filters.http.sse_to_metadata.v3

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• optional SseToMetadata.ProcessingRules response_rules = 1

  Rules for processing SSE response streams.

Rules for processing SSE streams and extracting metadata. The filter parses the SSE protocol (events delimited by blank lines), then delegates to a content parser to parse event content and extract metadata. The content parser determines which values to extract and how to write them to metadata.

Used in: SseToMetadata

• optional config.core.v3.TypedExtensionConfig content_parser = 1

  Content parser configuration for parsing event content and extracting metadata. The content parser specifies: - How to parse the event data (e.g., JSON, XML, plaintext) - Which values to extract from the parsed content (e.g., JSON paths like usage.total_tokens) - How to map extracted values to metadata (namespace, key, type conversions) - When to write metadata (on_present, on_missing, on_error actions) [#extension-category: envoy.content_parsers]

• optional google.protobuf.UInt32Value max_event_size = 2

  Maximum size in bytes for a single SSE event before it's considered invalid and discarded. This protects against unbounded memory growth from malicious or malformed streams that never send event delimiters (blank lines). Default is 8192 bytes (8KB), which is sufficient for most legitimate events. Set to 0 to disable the limit (not recommended for production). Maximum allowed value is 10485760 bytes (10MB).