Function fetchFileContent

server/api/registry/file/[...pkg].get.ts:49–89

* Fetch file content from jsDelivr CDN.

(
  packageName: string,
  version: string,
  filePath: string,
)

 * Fetch file content from jsDelivr CDN.
 */
async function fetchFileContent(
  packageName: string,
  version: string,
  filePath: string,
): Promise<{ content: string; contentType: string | null }> {
  const url = `https://cdn.jsdelivr.net/npm/${packageName}@${version}/${filePath}`
  const response = await fetch(url)

  if (!response.ok) {
    if (response.status === 404) {
      throw createError({ statusCode: 404, message: 'File not found' })
    }
    throw createError({
      statusCode: 502,
      message: 'Failed to fetch file from jsDelivr',
    })
  }

  const contentType = response.headers.get('content-type')

  // Check content-length header if available
  const contentLength = response.headers.get('content-length')
  if (contentLength && parseInt(contentLength, 10) > MAX_FILE_SIZE) {
    throw createError({
      statusCode: 413,
      message: `File too large (${(parseInt(contentLength, 10) / 1024 / 1024).toFixed(1)}MB). Maximum size is ${MAX_FILE_SIZE / 1024}KB.`,
    })
  }

  const content = await response.text()

  // Double-check size after fetching (in case content-length wasn't set)
  if (content.length > MAX_FILE_SIZE) {
    throw createError({
      statusCode: 413,
      message: `File too large (${(content.length / 1024 / 1024).toFixed(1)}MB). Maximum size is ${MAX_FILE_SIZE / 1024}KB.`,
    })
  }

  return { content, contentType }
}

/**
 * Returns syntax-highlighted HTML for a file in a package.