[SOLVED] What is the difference between res.send and res.write in express?

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

I am a beginner to express.js and I am trying to understand the difference between res.send & res.write ?

Solution

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:

response.write(chunk[, encoding][, callback])
Anatomy of an HTTP Transaction: Sending Response Body