jackwener/OpenCLI · error · CommandExecutionError

Pixiv bookmark item returned malformed creation date

Error message

Pixiv bookmark item returned malformed creation date

What it means

dateOnly normalizes a Pixiv bookmark item's creation date into a YYYY-MM-DD string. It throws CommandExecutionError when the value is a non-string or does not start with an ISO date (YYYY-MM-DD, optionally followed by 'T'), meaning the API response item was structurally unexpected.

Source

Thrown at clis/pixiv/bookmark-utils.js:23

  normalizePixivPositiveInteger,
  pixivFetch,
  requirePixivId,
  requirePixivPayloadObject,
  requirePixivString,
} from './utils.js';

export function normalizeBookmarkType(value) {
  const type = String(value ?? 'illust').trim();
  if (type !== 'illust' && type !== 'novel') {
    throw new ArgumentError(`Invalid bookmark type: ${type}. Expected "illust" or "novel".`);
  }
  return type;
}

export function dateOnly(value) {
  if (value == null || value === '') return '';
  if (typeof value !== 'string' || !/^\d{4}-\d{2}-\d{2}(?:T|$)/.test(value)) {
    throw new CommandExecutionError('Pixiv bookmark item returned malformed creation date');
  }
  return value.split('T')[0];
}

export function tagsToString(tags) {
  if (tags == null) return '';
  const values = Array.isArray(tags) ? tags : (Array.isArray(tags?.tags) ? tags.tags : null);
  if (!values) {
    throw new CommandExecutionError('Pixiv item returned malformed tags payload');
  }
  return values.map((entry) => {
    const value = typeof entry === 'string' ? entry : entry?.tag;
    if (typeof value !== 'string' || !value.trim()) {
      throw new CommandExecutionError('Pixiv item returned malformed tag');
    }
    return value.trim();
  }).join(', ');
}

View on GitHub (pinned to 49907e53dc)

Solutions

1. Check the raw API response item and confirm the created date field is an ISO 'YYYY-MM-DD...' string
2. Update the library / re-fetch the item in case the response was truncated or stale
3. If using a custom endpoint or proxy, verify it does not rewrite date formats; pre-normalize dates to ISO

Example fix

// before
item.createdAt = 1735732800000
// after
item.createdAt = '2024-01-02T00:00:00+09:00'

function hasIsoDate(item) { return typeof item?.createdAt === 'string' && /^\d{4}-\d{2}-\d{2}(?:T|$)/.test(item.createdAt); }
if (!bookmarkItems.every(hasIsoDate)) throw new Error('Response contains items with non-ISO createdAt');

function isIsoDateString(v) { return typeof v === 'string' && /^\d{4}-\d{2}-\d{2}(?:T|$)/.test(v); }

try { const rows = items.map(bookmarkRow); /* ... */ } catch (err) { if (err.message.includes('malformed creation date')) { console.error('Pixiv API returned an item with an invalid date; re-fetching...'); } else throw err; }

When it happens

Trigger: Parsing a bookmark list item whose created date field is missing, null-like values that pass the empty check (e.g. whitespace string), numeric timestamps, or API responses in an unexpected date format (e.g. '2024/01/02' or epoch millis).

Common situations: Pixiv API schema changes, partially failed API responses, proxy/mirror endpoints returning reformatted dates, items fetched from unofficial or cached endpoints.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

Related errors

• Pixiv item returned malformed tags payload
• Pixiv item returned malformed tag
• Pixiv bookmark item returned malformed ${label}
• ${label} returned a missing image URL
• ${label} returned a malformed image URL

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/3edef098ba95a313. Report an issue: GitHub.