Failed to load PDF in chrome/Firefox/IE

protected void doGetFile(final HttpServletRequest request, final HttpServletResponse response,
      final StorageFileItem file) throws IOException
  {
    // ETag, in "shaved" form of {SHA1{e5c244520e897865709c730433f8b0c44ef271f1}} (without quotes)
    // or null if file does not have SHA1 (like Virtual) or generated items (as their SHA1 would correspond to template,
    // not to actual generated content).
    final String etag;
    if (!file.isContentGenerated() && !file.isVirtual()
        && file.getRepositoryItemAttributes().containsKey(StorageFileItem.DIGEST_SHA1_KEY)) {
      etag = "{SHA1{" + file.getRepositoryItemAttributes().get(StorageFileItem.DIGEST_SHA1_KEY) + "}}";
      // tag header ETag: "{SHA1{e5c244520e897865709c730433f8b0c44ef271f1}}", quotes are must by RFC
      response.setHeader("ETag", "\"" + etag + "\"");
    }
    else {
      etag = null;
    }
    // content-type
    response.setHeader("Content-Type", file.getMimeType());

    // last-modified
    response.setDateHeader("Last-Modified", file.getModified());

    // content-length, if known
    if (file.getLength() != ContentLocator.UNKNOWN_LENGTH) {
      // Note: response.setContentLength Servlet API method uses ints (max 2GB file)!
      // TODO: apparently, some Servlet containers follow serlvet API and assume
      // contents can have 2GB max, so even this workaround below in inherently unsafe.
      // Jetty is checked, and supports this (uses long internally), but unsure for other containers
      response.setHeader("Content-Length", String.valueOf(file.getLength()));
    }

    // handle conditional GETs only for "static" content, actual content stored, not generated
    if (!file.isContentGenerated() && file.getResourceStoreRequest().getIfModifiedSince() != 0
        && file.getModified() <= file.getResourceStoreRequest().getIfModifiedSince()) {
      // this is a conditional GET using time-stamp
      response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
    }
    else if (!file.isContentGenerated() && file.getResourceStoreRequest().getIfNoneMatch() != null && etag != null
        && file.getResourceStoreRequest().getIfNoneMatch().equals(etag)) {
      // this is a conditional GET using ETag
      response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
    }
    else {
      // NEXUS-5023 disable IE for sniffing into response content
      response.setHeader("X-Content-Type-Options", "nosniff");

      final List<Range<Long>> ranges = getRequestedRanges(request, file.getLength());

      // pour the content, but only if needed (this method will be called even for HEAD reqs, but with content tossed
      // away), so be conservative as getting input stream involves locking etc, is expensive
      final boolean contentNeeded = "GET".equalsIgnoreCase(request.getMethod());
      if (ranges.isEmpty()) {
        if (contentNeeded) {
          try (final InputStream in = file.getInputStream()) {
            sendContent(in, response);
          }
        }
      }
      else if (ranges.size() > 1) {
        response.setStatus(HttpServletResponse.SC_NOT_IMPLEMENTED);
        renderer.renderErrorPage(request, response, file.getResourceStoreRequest(), new UnsupportedOperationException(
            "Multiple ranges not yet supported!"));
      }
      else {
        final Range<Long> range = ranges.get(0);
        if (!isRequestedRangeSatisfiable(file, range)) {
          response.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
          response.setHeader("Content-Length", "0");
          response.setHeader("Content-Range", "bytes */" + file.getLength());
          return;
        }
        final long bodySize = range.upperEndpoint() - range.lowerEndpoint();
        response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
        response.setHeader("Content-Length", String.valueOf(bodySize));
        response.setHeader("Content-Range",
            range.lowerEndpoint() + "-" + range.upperEndpoint() + "/" + file.getLength());
        if (contentNeeded) {
          try (final InputStream in = file.getInputStream()) {
            in.skip(range.lowerEndpoint());
            sendContent(limit(in, bodySize), response);
          }
        }
      }
    }
  }