khanon
30 lines
800 B
TypeScript
30 lines
800 B
TypeScript
export type ServerSentEvent = { id?: string; type?: string; data: string };
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/** Given a string of SSE data, parse it into a `ServerSentEvent` object. */
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export function parseEvent(event: string) {
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const buffer: ServerSentEvent = { data: "" };
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return event.split(/\r?\n/).reduce(parseLine, buffer);
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}
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function parseLine(event: ServerSentEvent, line: string) {
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const separator = line.indexOf(":");
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const field = separator === -1 ? line : line.slice(0, separator);
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const value = separator === -1 ? "" : line.slice(separator + 1);
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switch (field) {
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case "id":
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event.id = value.trim();
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break;
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case "event":
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event.type = value.trim();
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break;
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case "data":
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event.data += value.trimStart();
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break;
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default:
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break;
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}
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return event;
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}
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