astro/dist/core/request-body.js

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

async function readBodyWithLimit(request, limit) {
  const contentLengthHeader = request.headers.get("content-length");
  if (contentLengthHeader) {
    const contentLength = Number.parseInt(contentLengthHeader, 10);
    if (Number.isFinite(contentLength) && contentLength > limit) {
      throw new BodySizeLimitError(limit);
    }
  }
  if (!request.body) return new Uint8Array();
  const reader = request.body.getReader();
  const chunks = [];
  let received = 0;
  while (true) {
    const { done, value } = await reader.read();
    if (done) break;
    if (value) {
      received += value.byteLength;
      if (received > limit) {
        throw new BodySizeLimitError(limit);
      }
      chunks.push(value);
    }
  }
  const buffer = new Uint8Array(received);
  let offset = 0;
  for (const chunk of chunks) {
    buffer.set(chunk, offset);
    offset += chunk.byteLength;
  }
  return buffer;
}
class BodySizeLimitError extends Error {
  limit;
  constructor(limit) {
    super(`Request body exceeds the configured limit of ${limit} bytes`);
    this.name = "BodySizeLimitError";
    this.limit = limit;
  }
}
export {
  BodySizeLimitError,
  readBodyWithLimit
};