What sets res.redirect apart from res.sendfile?

I recently completed a tutorial challenge where I set up a 'failure' page that included a 'Try again' button. This button redirects the user back to '/signup/html'. In my code, I utilized

app.post("/failure", (req, res) => {
  res.sendFile(__dirname + "/signup.html");
});

However, in the tutorial, they used the res.redirect method instead.

While the end result may be the same, I'm curious if there are any differences or implications between using res.redirect and res.sendFile behind the scenes?

Thanks for your help!

javascriptexpress

Answer №1

Initially, it may seem that utilizing the redirect function leads to a redirect while the sendFile function simply sends a file.

Assuming in other parts of the codebase, there is a response to a specific path like /signin by employing the redirect function to send the same file. Although the end outcome might appear similar, there are significant differences:

  1. When using redirect, you only have to specify the filename once, which makes maintenance easier.

  2. If there is middleware set up on the other route (/signin or another), that middleware will be executed with a redirect but not when using direct code.

  3. The redirect sends an instruction back to the browser asking for the other URL, whereas your code directly transmits the file.

  4. By utilizing redirect, you can choose to set the HTTP status code for the redirection, giving you the option to specify if it is permanent (e.g., using status code 302).

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