Error: No defaultengine was specified and no extension was provided.this.defaultEngine) {
throw new Error('No defaultengine was specified and no extension was provided
function(err, raw) { if (err) throw err;})Error: No defaultengine was specified and no extension was provided.{ ok: 0, n: 0, nModified: 0 }
对对象数组进行硬编码会产生相同的结果
main.use('/ud/files', express.static(path.join(__dirname, 'public/files')));Error: No defaultengine was specified and no extension was provided. at new View (bla bla)
对于/ud/files/tX2r8z/u