astro/dist/assets/utils/remoteProbe.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { AstroError, AstroErrorData } from "../../core/errors/index.js";
import { imageMetadata } from "./metadata.js";
async function inferRemoteSize(url) {
  const response = await fetch(url);
  if (!response.body || !response.ok) {
    throw new AstroError({
      ...AstroErrorData.FailedToFetchRemoteImageDimensions,
      message: AstroErrorData.FailedToFetchRemoteImageDimensions.message(url)
    });
  }
  const reader = response.body.getReader();
  let done, value;
  let accumulatedChunks = new Uint8Array();
  while (!done) {
    const readResult = await reader.read();
    done = readResult.done;
    if (done) break;
    if (readResult.value) {
      value = readResult.value;
      let tmp = new Uint8Array(accumulatedChunks.length + value.length);
      tmp.set(accumulatedChunks, 0);
      tmp.set(value, accumulatedChunks.length);
      accumulatedChunks = tmp;
      try {
        const dimensions = await imageMetadata(accumulatedChunks, url);
        if (dimensions) {
          await reader.cancel();
          return dimensions;
        }
      } catch {
      }
    }
  }
  throw new AstroError({
    ...AstroErrorData.NoImageMetadata,
    message: AstroErrorData.NoImageMetadata.message(url)
  });
}
export {
  inferRemoteSize
};