LeetLLM
MediumParsingPython 3

SSE Event Parser

Parse chunked server-sent events while handling split lines, comments, and multiline data payloads.

35m3 sample tests5 hidden tests

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 beginning with data: add payload text.
  • 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

python
1chunks = ["data: hello\\n", "data: world\\n\\n"] 2assert parse_sse_events(chunks) == ["hello\\nworld"]

Constraints

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

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