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Guard dev health JSON parsing

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Co-Authored-By: Paperclip <noreply@paperclip.ing>
This commit is contained in:
dotta 2026-04-06 20:17:47 -05:00
parent bfa60338cc
commit 9a8a169e95
7 changed files with 122 additions and 8 deletions
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42
scripts/dev-runner-output.mjs
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@ -1,7 +1,12 @@
const DEFAULT_CAPTURED_OUTPUT_BYTES = 256 * 1024;
const DEFAULT_JSON_RESPONSE_BYTES = 64 * 1024;
function normalizeByteLimit(maxBytes) {
return Math.max(1, Math.trunc(maxBytes));
}
export function createCapturedOutputBuffer(maxBytes = DEFAULT_CAPTURED_OUTPUT_BYTES) {
const limit = Math.max(1, Math.trunc(maxBytes));
const limit = normalizeByteLimit(maxBytes);
const chunks = [];
let bufferedBytes = 0;
let totalBytes = 0;
@ -51,3 +56,38 @@ export function createCapturedOutputBuffer(maxBytes = DEFAULT_CAPTURED_OUTPUT_BY
},
};
}
export async function parseJsonResponseWithLimit(response, maxBytes = DEFAULT_JSON_RESPONSE_BYTES) {
const limit = normalizeByteLimit(maxBytes);
const contentLength = Number.parseInt(response.headers.get("content-length") ?? "", 10);
if (Number.isFinite(contentLength) && contentLength > limit) {
throw new Error(`Response exceeds ${limit} bytes`);
}
if (!response.body) {
return JSON.parse("");
}
const reader = response.body.getReader();
const decoder = new TextDecoder();
let text = "";
let totalBytes = 0;
try {
while (true) {
const { done, value } = await reader.read();
if (done) break;
totalBytes += value.byteLength;
if (totalBytes > limit) {
await reader.cancel("response too large");
throw new Error(`Response exceeds ${limit} bytes`);
}
text += decoder.decode(value, { stream: true });
}
text += decoder.decode();
} finally {
reader.releaseLock();
}
return JSON.parse(text);
}