做个记录
res.send() will send the HTTP response. Its syntax is,
res.send([body])
The body parameter can be a Buffer object, a String, an object, or an Array. For example:
res.send(new Buffer(‘whoop‘));
res.send({ some: ‘json‘ });
res.send(‘<p>some html</p>‘);
res.status(404).send(‘Sorry, we cannot find that!‘);
res.status(500).send({ error: ‘something blew up‘ });
See this for more info.
res.end() will end the response process. This method actually comes from Node core, specifically the response.end() method of http.ServerResponse. It is used to quickly end the response without any data. For example:
res.end(); res.status(404).end();
Read this for more info.