src/read-capped.ts

Functions

Imports

It imports no other module of this repo. Imported by src/live-checks.ts, src/ops-snapshot.ts.

Source

1// No imports: the explorer build loads this through ops-snapshot.ts (.github/workflows/explorer.yml).
2
3/** The body as text, read no further than `max` bytes. */
4export async function readCapped(res: Response, max: number): Promise<{ text: string; truncated: boolean }> {
5  if (!res.body) return { text: await res.text(), truncated: false };
6  const reader = res.body.getReader();
7  const decoder = new TextDecoder();
8  let text = "";
9  let size = 0;
10  for (;;) {
11    const { done, value } = await reader.read();
12    if (done) return { text: text + decoder.decode(), truncated: false };
13    size += value.byteLength;
14    if (size > max) {
15      await reader.cancel();
16      return { text, truncated: true };
17    }
18    text += decoder.decode(value, { stream: true });
19  }
20}