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

by

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:

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:

More Related Contents:

  1. npm WARN package.json: No repository field
  2. Purpose of installing Twitter Bootstrap through npm?
  3. npm can’t find package.json
  4. Error “npm WARN package.json: No repository field”
  5. Difference between `npm start` & `node app.js`, when starting app?
  6. How to organise file structure of backend and frontend in MERN
  7. How to store a file with file extension with multer?
  8. collection is not defined in mongodb
  9. Express.js req.body undefined
  10. NPM modules won’t install globally without sudo
  11. How do I install a module globally using npm?
  12. “message failed to fetch from registry” while trying to install any module
  13. NodeJS – Error installing with NPM
  14. How to use private Github repo as npm dependency
  15. npm ERR! Error: EPERM: operation not permitted, rename
  16. How to get all registered routes in Express?
  17. How can I solve error gypgyp ERR!ERR! find VSfind VS msvs_version not set from command line or npm config?
  18. Error installing bcrypt with npm
  19. npm WARN npm npm does not support Node.js v9.1.0
  20. Error: No default engine was specified and no extension was provided
  21. node.js http.get hangs after 5 requests to remote site
  22. Express res.sendfile throwing forbidden error
  23. ExpressJS & Websocket & session sharing
  24. Error message “ENOENT, no such file or directory”
  25. Node.js, can’t open files. Error: ENOENT, stat ‘./path/to/file’
  26. GYP ERR! build error. stack Error: ‘make’ failed with exit code 2
  27. What is the pwa-node type launch configuration on VSCode?
  28. Why POST redirects to GET and PUT redirects to PUT?
  29. Why can’t we do multiple response.send in Express.js?
  30. Node.js: how to limit the HTTP request size and upload file size?

Leave a Comment