var type = Cc["@mozilla.org/uriloader/external-helper-app-service;1"] .getService(Ci.nsIMIMEService) .getTypeFromFile(file); 
return Cc["@mozilla.org/uriloader/external-helper-app-service;1"] .getService(Ci.nsIMIMEService) .getTypeFromFile(file); 
function getTypeFromFile(file){  try  {    var type = Cc["@mozilla.org/uriloader/external-helper-app-service;1"]                 .getService(Ci.nsIMIMEService)                 .getTypeFromFile(file);  }  catch (e)  {    type = "application/octet-stream";  }  return type;}
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/83ffd0f377352f73cd8d129e6518b12639a482e4/httpd.js/clean/netwerk/test/httpserver/httpd.js