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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_sg0vhvv89kvhd36q0i2isu76kr, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
// TODO: only works with NanoHTTPD for now
sclass HttpFromFileSystem {
  File baseDir;
  bool serveDirectoryListings;
  
  O serve(S uri) {
    LS parts = nempties(splitAtSlash(uri));
    
    // process . and ..
    for i over parts:
      if (eq(parts.get(i), ".")) parts.remove(i);
      else if (eq(parts.get(i), ".."))
        if (i == 0) fail(".. leading nowhere: " + uri);
        else {
          parts.remove(i);
          parts.remove(--i);
        }
      
    if (all validFileName(parts)) fail("Bad path: " + uri);
    
    File f = baseDir;
    if (!isDirectory(dir)) print("Base dir not found: " + f2s(f));
    for (S part : parts) {
      f = newFile(f, part);
      if (!fileExists(f))
        fail("Path not found: " + uri);
    }
    if (isDirectory(f))
      ret serveListing(f);
    else
      ret serveFile(f);
  }
  
  O serveFile(File f) {
    ret main serveFile(f, contentTypeForFile(f));
  }
  
  O serveListing(File dir) {
    if (!serveDirectoryListings) fail("Can't serve directory listings");
    ret "Directory listing"
      + ul_htmlEncode(listFileNames(dir));
  }
  
  swappable S contentTypeForFile(File f) {
    ret or2(extensionToMimeType(f), binaryMimeType());
  }
  
  swappable bool validFileName(S name) { ret isValidFileName(name); }
}