deepseek-ai/deepseek-harness · error · WebError

WEB_INVALID_URL

WEB_INVALID_URL

Error message

URL exceeds the maximum length of ${maxUrlLength}

What it means

Error "URL exceeds the maximum length of ${maxUrlLength}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/web/web-fetch-http/src/policy.ts:26

import { WebError } from '@deepseek-ai/dsh-web'

/** The body kinds this provider decodes. */
export type FetchableKind = 'html' | 'text'

/**
 * Validate a request URL against the basic transport hygiene the provider
 * enforces before any network access: http(s) only, no embedded credentials,
 * bounded length. Returns the parsed `URL`. Throws {@link WebError} otherwise.
 * (SSRF / private-network blocking is deferred — see the package Agent Note.)
 *
 * @param input - the raw URL string from the fetch request.
 * @param maxUrlLength - inclusive upper bound on `input`'s length.
 * @returns the parsed `URL`.
 */
export function validateFetchUrl(input: string, maxUrlLength: number): URL {
  if (input.length > maxUrlLength) {
    throw new WebError(`URL exceeds the maximum length of ${maxUrlLength}`, 'WEB_INVALID_URL')
  }
  let url: URL
  try {
    url = new URL(input)
  } catch (error: unknown) {
    throw new WebError(`invalid URL: ${input}`, 'WEB_INVALID_URL', { cause: error })
  }
  if (url.protocol !== 'http:' && url.protocol !== 'https:') {
    throw new WebError(`unsupported URL scheme "${url.protocol}" (only http and https are allowed)`, 'WEB_INVALID_URL')
  }
  if (url.username.length > 0 || url.password.length > 0) {
    throw new WebError('credentials in URLs are not allowed', 'WEB_BLOCKED_URL')
  }
  return url
}

/**
 * Two URLs are same-origin when scheme, hostname, and port match. A redirect

View on GitHub (pinned to b150a551b8)

Solutions

1. Shorten the URL below the maximum length, or raise maxUrlLength in configuration.

When it happens

Trigger: Thrown at packages/web/web-fetch-http/src/policy.ts:26 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/9ddd353a144f0620. Report an issue: GitHub.