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node.js - What is the difference between res.send and res.write in express?

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replyed Oct 17, 2021 by 深蓝 (71.8m points)

res.send

res.send is only in Express.js.
Performs many useful tasks for simple non-streaming responses.
Ability to automatically assigns the Content-Length HTTP response header field.
Ability to provides automatic HEAD & HTTP cache freshness support.
Practical explanation
- res.send can only be called once, since it is equivalent to res.write + res.end()
- Example:
```
app.get('/user/:id', function (req, res) {
    res.send('OK');
});
```

For more details:

Express.js: Response

res.write

Can be called multiple times to provide successive parts of the body.

Example:

response.write('<html>');
response.write('<body>');
response.write('<h1>Hello, World!</h1>');
response.write('</body>');
response.write('</html>');
response.end();

For more details:

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