response-iterator/dist/umd/response-iterator.cjs.map

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

{"version":3,"file":"response-iterator.cjs","sources":["../../src/iterators/async.ts","../../src/iterators/nodeStream.ts","../../src/iterators/promise.ts","../../src/iterators/reader.ts","../../src/index.ts"],"sourcesContent":["export default function asyncIterator<T>(source): AsyncIterableIterator<T> {\n  const iterator = source[Symbol.asyncIterator]();\n  return {\n    next(): Promise<IteratorResult<T, boolean>> {\n      return iterator.next();\n    },\n    [Symbol.asyncIterator](): AsyncIterator<T> {\n      return this;\n    },\n  } as AsyncIterableIterator<T>;\n}\n","import type { Readable as NodeReadableStream } from 'stream';\n\nconst hasIterator = typeof Symbol !== 'undefined' && Symbol.asyncIterator;\n\n/* c8 ignore start */\nexport default function nodeStreamIterator<T>(stream: NodeReadableStream): AsyncIterableIterator<T> {\n  let cleanup = null;\n  let error = null;\n  let done = false;\n  const data = [];\n  const waiting = [];\n\n  function onData(chunk) {\n    if (error) return;\n    if (waiting.length) return waiting.shift()[0]({ value: chunk, done: false });\n    data.push(chunk);\n  }\n  function onError(err) {\n    error = err;\n    const all = waiting.slice();\n    all.forEach((pair) => {\n      pair[1](err);\n    });\n    !cleanup || cleanup();\n  }\n  function onEnd() {\n    done = true;\n    const all = waiting.slice();\n    all.forEach((pair) => {\n      pair[0]({ value: undefined, done: true });\n    });\n    !cleanup || cleanup();\n  }\n\n  cleanup = () => {\n    cleanup = null;\n    stream.removeListener('data', onData);\n    stream.removeListener('error', onError);\n    stream.removeListener('end', onEnd);\n    stream.removeListener('finish', onEnd);\n    stream.removeListener('close', onEnd);\n  };\n  stream.on('data', onData);\n  stream.on('error', onError);\n  stream.on('end', onEnd);\n  stream.on('finish', onEnd);\n  stream.on('close', onEnd);\n\n  function getNext(): Promise<IteratorResult<T, boolean>> {\n    return new Promise((resolve, reject) => {\n      if (error) return reject(error);\n      if (data.length) return resolve({ value: data.shift(), done: false });\n      if (done) return resolve({ value: undefined, done: true });\n      waiting.push([resolve, reject]);\n    });\n  }\n\n  const iterator = {\n    next(): Promise<IteratorResult<T, boolean>> {\n      return getNext();\n    },\n  };\n\n  if (hasIterator) {\n    iterator[Symbol.asyncIterator] = function (): AsyncIterator<T> {\n      return this;\n    };\n  }\n\n  return iterator as AsyncIterableIterator<T>;\n}\n/* c8 ignore stop */\n","const hasIterator = typeof Symbol !== 'undefined' && Symbol.asyncIterator;\n\n/* c8 ignore start */\nexport default function promiseIterator<T>(promise): AsyncIterableIterator<T> {\n  let resolved = false;\n\n  const iterator = {\n    next(): Promise<IteratorResult<T, boolean>> {\n      if (resolved) return Promise.resolve({ value: undefined, done: true });\n      resolved = true;\n      return new Promise((resolve, reject) => {\n        promise\n          .then((value) => {\n            resolve({ value, done: false });\n          })\n          .catch(reject);\n      });\n    },\n  };\n\n  if (hasIterator) {\n    iterator[Symbol.asyncIterator] = function (): AsyncIterator<T> {\n      return this;\n    };\n  }\n\n  return iterator as AsyncIterableIterator<T>;\n}\n/* c8 ignore stop */\n","const hasIterator = typeof Symbol !== 'undefined' && Symbol.asyncIterator;\n\n/* c8 ignore start */\nexport default function readerIterator<T>(reader): AsyncIterableIterator<T> {\n  const iterator = {\n    next(): Promise<IteratorResult<T, boolean>> {\n      return reader.read();\n    },\n  };\n\n  if (hasIterator) {\n    iterator[Symbol.asyncIterator] = function (): AsyncIterator<T> {\n      return this;\n    };\n  }\n\n  return iterator as AsyncIterableIterator<T>;\n}\n/* c8 ignore stop */\n","import type { Readable as NodeReadableStream } from 'stream';\nimport type { AxiosResponse } from 'axios';\nimport type { Response as NodeResponse } from 'node-fetch';\n\nimport asyncIterator from './iterators/async';\nimport nodeStreamIterator from './iterators/nodeStream';\nimport promiseIterator from './iterators/promise';\nimport readerIterator from './iterators/reader';\n\ninterface CrossFetchResponse {\n  _bodyBlob: Blob;\n}\n\nconst hasIterator = typeof Symbol !== 'undefined' && Symbol.asyncIterator;\n\n/**\n * @param response A response. Supports fetch, node-fetch, and cross-fetch\n */\nexport default function responseIterator<T>(response: unknown): AsyncIterableIterator<T> {\n  if (response === undefined) throw new Error('Missing response for responseIterator');\n\n  // determine the body\n  let body: unknown = response;\n  if ((response as NodeResponse).body) body = (response as NodeResponse).body;\n  // node-fetch, browser fetch, undici\n  else if ((response as AxiosResponse).data) body = (response as AxiosResponse).data;\n  // axios\n  /* c8 ignore start */ else if ((response as CrossFetchResponse)._bodyBlob) body = (response as CrossFetchResponse)._bodyBlob; // cross-fetch\n  /* c8 ignore stop */\n\n  // adapt the body\n  if (hasIterator && body[Symbol.asyncIterator]) return asyncIterator<T>(body as AsyncIterableIterator<T>);\n  /* c8 ignore start */\n  if ((body as ReadableStream<T>).getReader) return readerIterator<T>((body as ReadableStream<T>).getReader());\n  if ((body as Blob).stream) return readerIterator<T>(((body as Blob).stream() as unknown as ReadableStream<T>).getReader());\n  if ((body as Blob).arrayBuffer) return promiseIterator<T>((body as Blob).arrayBuffer());\n  if ((body as NodeReadableStream).pipe) return nodeStreamIterator<T>(body as NodeReadableStream);\n  /* c8 ignore stop */\n\n  throw new Error('Unknown body type for responseIterator. 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