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This is done to avoid a couple of bugs to do with Blob#stream and\n * Readable#to/fromWeb in Node versions we support:\n * - https://github.com/nodejs/node/issues/42694 (fixed in Node 18.14)\n * - https://github.com/nodejs/node/issues/48916 (fixed in Node 20.6)\n *\n * Once these versions are no longer supported, we may be able to stop doing this.\n *\n * @internal\n */\nconst rawContent: unique symbol = Symbol(\"rawContent\");\n\n/**\n * Type signature of a blob-like object with a raw content property.\n */\nexport interface RawContent extends Blob {\n [rawContent](): Uint8Array | NodeJS.ReadableStream | ReadableStream<Uint8Array>;\n}\n\n/**\n * Type guard to check if a given object is a blob-like object with a raw content property.\n */\nexport function hasRawContent(x: unknown): x is RawContent {\n return typeof (x as RawContent)[rawContent] === \"function\";\n}\n\n/**\n * Extract the raw content from a given blob-like object. If the input was created using createFile\n * or createFileFromStream, the exact content passed into createFile/createFileFromStream will be used.\n * For true instances of Blob and File, returns the actual blob.\n *\n * @internal\n */\nexport function getRawContent(\n blob: Blob,\n): Blob | NodeJS.ReadableStream | ReadableStream<Uint8Array> | Uint8Array {\n if (hasRawContent(blob)) {\n return blob[rawContent]();\n } else {\n return blob;\n }\n}\n\n/**\n * Create an object that implements the File interface. This object is intended to be\n * passed into RequestBodyType.formData, and is not guaranteed to work as expected in\n * other situations.\n *\n * Use this function to:\n * - Create a File object for use in RequestBodyType.formData in environments where the\n * global File object is unavailable.\n * - Create a File-like object from a readable stream without reading the stream into memory.\n *\n * @param stream - the content of the file as a callback returning a stream. When a File object made using createFile is\n * passed in a request's form data map, the stream will not be read into memory\n * and instead will be streamed when the request is made. In the event of a retry, the\n * stream needs to be read again, so this callback SHOULD return a fresh stream if possible.\n * @param name - the name of the file.\n * @param options - optional metadata about the file, e.g. file name, file size, MIME type.\n */\nexport function createFileFromStream(\n stream: () => ReadableStream<Uint8Array> | NodeJS.ReadableStream,\n name: string,\n options: CreateFileFromStreamOptions = {},\n): File {\n return {\n ...unimplementedMethods,\n type: options.type ?? \"\",\n lastModified: options.lastModified ?? new Date().getTime(),\n webkitRelativePath: options.webkitRelativePath ?? \"\",\n size: options.size ?? -1,\n name,\n stream: () => {\n const s = stream();\n if (isNodeReadableStream(s)) {\n throw new Error(\n \"Not supported: a Node stream was provided as input to createFileFromStream.\",\n );\n }\n\n return s;\n },\n [rawContent]: stream,\n } as File & RawContent;\n}\n\n/**\n * Create an object that implements the File interface. This object is intended to be\n * passed into RequestBodyType.formData, and is not guaranteed to work as expected in\n * other situations.\n *\n * Use this function create a File object for use in RequestBodyType.formData in environments where the global File object is unavailable.\n *\n * @param content - the content of the file as a Uint8Array in memory.\n * @param name - the name of the file.\n * @param options - optional metadata about the file, e.g. file name, file size, MIME type.\n */\nexport function createFile(\n content: Uint8Array,\n name: string,\n options: CreateFileOptions = {},\n): File {\n if (isNodeLike) {\n return {\n ...unimplementedMethods,\n type: options.type ?? \"\",\n lastModified: options.lastModified ?? new Date().getTime(),\n webkitRelativePath: options.webkitRelativePath ?? \"\",\n size: content.byteLength,\n name,\n arrayBuffer: async () => content.buffer,\n stream: () => new Blob([toArrayBuffer(content)]).stream(),\n [rawContent]: () => content,\n } as File & RawContent;\n } else {\n return new File([toArrayBuffer(content)], name, options);\n }\n}\n\nfunction toArrayBuffer(source: Uint8Array): Uint8Array<ArrayBuffer> {\n if (\"resize\" in source.buffer) {\n // ArrayBuffer\n return source as Uint8Array<ArrayBuffer>;\n }\n // SharedArrayBuffer\n return source.map((x) => x);\n}\n"]}
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