SSE Event Parser

Parse server-sent event chunks into complete data payloads.

Requirements

• Define parse_sse_events(chunks).
• chunks is a list of strings from a streaming response.
• Events are separated by a blank line.
• Lines may end with LF or CRLF; strip a trailing \r from each completed line before field handling.
• Lines beginning with data: add payload text. After the colon, if the next character is a single space, remove that one space and keep any further spaces (WHATWG SSE rule).
• Multiple data: lines in one event join with \n.
• Lines beginning with : are comments and should be ignored.
• Ignore other fields such as event: and id:.
• Return a list of completed event data strings.
• Ignore an incomplete final event without a trailing blank line.

Example

Constraints

• Chunk boundaries may split lines anywhere.
• Use an explicit state machine or careful line buffering.
• Don't require network or async code.