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{"version":3,"file":"stream.cjs","sources":["../src/stream.ts"],"sourcesContent":["import {createParser} from './parse.ts'\nimport type {EventSourceMessage, EventSourceParser} from './types.ts'\n\n/**\n * Options for the EventSourceParserStream.\n *\n * @public\n */\nexport interface StreamOptions {\n /**\n * Behavior when a parsing error occurs.\n *\n * - A custom function can be provided to handle the error.\n * - `'terminate'` will error the stream and stop parsing.\n * - Any other value will ignore the error and continue parsing.\n *\n * @defaultValue `undefined`\n */\n onError?: ('terminate' | ((error: Error) => void)) | undefined\n\n /**\n * Callback for when a reconnection interval is sent from the server.\n *\n * @param retry - The number of milliseconds to wait before reconnecting.\n */\n onRetry?: ((retry: number) => void) | undefined\n\n /**\n * Callback for when a comment is encountered in the stream.\n *\n * @param comment - The comment encountered in the stream.\n */\n onComment?: ((comment: string) => void) | undefined\n}\n\n/**\n * A TransformStream that ingests a stream of strings and produces a stream of `EventSourceMessage`.\n *\n * @example Basic usage\n * ```\n * const eventStream =\n * response.body\n * .pipeThrough(new TextDecoderStream())\n * .pipeThrough(new EventSourceParserStream())\n * ```\n *\n * @example Terminate stream on parsing errors\n * ```\n * const eventStream =\n * response.body\n * .pipeThrough(new TextDecoderStream())\n * .pipeThrough(new EventSourceParserStream({terminateOnError: true}))\n * ```\n *\n * @public\n */\nexport class EventSourceParserStream extends TransformStream<string, EventSourceMessage> {\n constructor({onError, onRetry, onComment}: StreamOptions = {}) {\n let parser!: EventSourceParser\n\n super({\n start(controller) {\n parser = createParser({\n onEvent: (event) => {\n controller.enqueue(event)\n },\n onError(error) {\n if (onError === 'terminate') {\n controller.error(error)\n } else if (typeof onError === 'function') {\n onError(error)\n }\n\n // Ignore by default\n },\n onRetry,\n onComment,\n })\n },\n transform(chunk) {\n parser.feed(chunk)\n },\n })\n }\n}\n\nexport {type ErrorType, ParseError} from './errors.ts'\nexport type {EventSourceMessage} from './types.ts'\n"],"names":["createParser"],"mappings":";;;AAwDO,MAAM,gCAAgC,gBAA4C;AAAA,EACvF,YAAY,EAAC,SAAS,SAAS,UAAA,IAA4B,CAAA,GAAI;AAC7D,QAAI;AAEJ,UAAM;AAAA,MACJ,MAAM,YAAY;AAChB,iBAASA,MAAAA,aAAa;AAAA,UACpB,SAAS,CAAC,UAAU;AAClB,uBAAW,QAAQ,KAAK;AAAA,UAC1B;AAAA,UACA,QAAQ,OAAO;AACT,wBAAY,cACd,WAAW,MAAM,KAAK,IACb,OAAO,WAAY,cAC5B,QAAQ,KAAK;AAAA,UAIjB;AAAA,UACA;AAAA,UACA;AAAA,QAAA,CACD;AAAA,MACH;AAAA,MACA,UAAU,OAAO;AACf,eAAO,KAAK,KAAK;AAAA,MACnB;AAAA,IAAA,CACD;AAAA,EACH;AACF;;;"} |