Function globHandler

lib/handlers/get.mjs:171–238

(req, res, next)

}

async function globHandler (req, res, next) {
  const { ldp } = req.app.locals

  // Ensure this is a glob for all files in a single folder
  // https://github.com/solid/solid-spec/pull/148
  const requestUrl = await ldp.resourceMapper.getRequestUrl(req)
  if (!/^[^*]+\/\*$/.test(requestUrl)) {
    return next(HTTPError(404, 'Unsupported glob pattern'))
  }

  // Extract the folder on the file system from the URL glob
  const folderUrl = requestUrl.substr(0, requestUrl.length - 1)
  const folderPath = (await ldp.resourceMapper.mapUrlToFile({ url: folderUrl, searchIndex: false })).path

  const globOptions = {
    noext: true,
    nobrace: true,
    nodir: true
  }

  try {
    const matches = await glob(`${folderPath}*`, globOptions)
    if (matches.length === 0) {
      debugGlob('No files matching the pattern')
      return next(HTTPError(404, 'No files matching glob pattern'))
    }

    // Matches found
    const globGraph = $rdf.graph()

    debugGlob('found matches ' + matches)
    await Promise.all(matches.map(match => new Promise(async (resolve, reject) => {
      const urlData = await ldp.resourceMapper.mapFileToUrl({ path: match, hostname: req.hostname })
      fs.readFile(match, { encoding: 'utf8' }, function (err, fileData) {
        if (err) {
          debugGlob('error ' + err)
          return resolve()
        }
        // Files should be Turtle
        if (urlData.contentType !== 'text/turtle') {
          return resolve()
        }
        // The agent should have Read access to the file
        hasReadPermissions(match, req, res, function (allowed) {
          if (allowed) {
            try {
              $rdf.parse(fileData, globGraph, urlData.url, 'text/turtle')
            } catch (parseErr) {
              debugGlob(`error parsing ${match}: ${parseErr}`)
            }
          }
          return resolve()
        })
      })
    })))

    const data = $rdf.serialize(undefined, globGraph, requestUrl, 'text/turtle')
    // TODO this should be added as a middleware in the routes