CODEWITHSUNDEEP
javascriptnode.jsexpress
Shane
Shane

Reputation: 5677

Nodejs Two requests are getting fired at a time

Why is my NodeJS app firing two requests every time? I am not sure why this OPTIONS is getting fired each and every time, when i am actually only calling the HTTP Methods => [GET, POST, PUT, DELETE]

OPTIONS /api/v1/admin/user/55e1d606803478cc1edacfa0 200 0.149 ms - -
DELETE /api/v1/admin/user/55e1d606803478cc1edacfa0 200 7.598 ms - 58

Below is my code where i am calling OPTIONS.

app.all('/*', function(req, res, next){
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Methods", "GET, PUT, POST, DELETE, OPTIONS");
    res.header("Access-Control-Allow-Headers", "Content-type,Accept,X-Access-Token,X-Key");

    if(req.method === 'OPTIONS'){
        res.status(200).end();
    } else {
        next();
    }

});

Because of this two users are getting deleted at the same time.

Upvotes: 0

Views: 158

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074148

Why is my NodeJS app firing two requests every time?

It isn't; the browser is.

I am not sure why this OPTIONS is getting fired each and every time, when i am actually only calling the HTTP Methods => [GET, POST, PUT, DELETE]

Most likely because you're making cross-origin calls, using ajax in a web browser. The OPTIONS call is the preflight call the browser makes prior to the real call to ensure that the destination server accepts cross-origin calls from a given origin and, if so, to find out what headers, methods, credentials, etc. the server accepts from that origin.

More in the specification.

Not all cross-origin calls require a preflight, but many (possibly most) do; the rules are here.

Upvotes: 4

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