var extsprintf = require('extsprintf'); var fs = require('fs'); var verror = require('../lib/verror');
function checkFile(filename, callback) {
fs.stat(filename, function (err) { if (err) /* Annotate the "stat" error with what we were doing. */ return (callback(new verror.VError(err, 'failed to check "%s"', filename))); /* ... */ return (callback()); });
}
function handleRequest(filename, callback) {
checkFile('/nonexistent', function (err) { if (err) /* Annotate the "checkFile" error. */ return (callback(new verror.VError( err, 'request failed'))); /* ... */ return (callback()); });
}
handleRequest('/nonexistent', function (err) {
if (err) { console.log(err.message); console.log(extsprintf.sprintf('%r', err)); } /* ... */
});