Using multiple parameters in URL in express

Question

I am using Express with Node and I have a requirement in which the user can request the URL as: http://myhost/fruit/apple/red.

Such a request will return a JSON response.

The JSON data, before the above call looks like:

{
    "fruit": {
        "apple": "foo"
    }
}

With the above request, the response JSON data should be:

{
    "apple": "foo",
    "color": "red"
}

I have configured express to route as follows:

app.get('/fruit/:fruitName/:fruitColor', function(request, response) {
    /*return the response JSON data as above using request.params.fruitName and 
request.params.fruitColor to fetch the fruit apple and update its color to red*/
    });

But this does not work. I am unsure of how to pass multiple parameters, that is, I am unsure if /fruit/:fruitName/:fruitColor is the correct way to do this. Is it?

chovy · Accepted Answer · 2013-02-28 06:37:37Z

180

app.get('/fruit/:fruitName/:fruitColor', function(req, res) {
    var data = {
        "fruit": {
            "apple": req.params.fruitName,
            "color": req.params.fruitColor
        }
    }; 

    send.json(data);
});

If that doesn't work, try using console.log(req.params) to see what it is giving you.

answered Feb 28, 2013 at 6:37

chovy

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5 Comments

MadPhysicist Over a year ago

Do you know if something like this is possible? /fruit/:fruitName/vegetable/:vegetableName'

chovy Over a year ago

sure. just do it like that then do req.params.fruitName and req.params.vegetableName

loretoparisi Over a year ago

It works, but it happens that static resources will be addressed under /fruit in this case like /fruit/js/main.js where I have public/js/main.js as my static files folder.

Dipanshu Mahla Over a year ago

this does not work when one of the parameters is missing

eran otzap Over a year ago

@chovy what is the correct query string to call such an endpoint ?fruitName=${fruitName}&fruitColor=${fruitColor}

ndonohoe · Accepted Answer · 2019-11-06 18:59:30Z

43

For what you want I would've used

    app.get('/fruit/:fruitName&:fruitColor', function(request, response) {
       const name = request.params.fruitName 
       const color = request.params.fruitColor 
    });

or better yet

    app.get('/fruit/:fruit', function(request, response) {
       const fruit = request.params.fruit
       console.log(fruit)
    });

where fruit is a object. So in the client app you just call

https://mydomain.dm/fruit/{"name":"My fruit name", "color":"The color of the fruit"}

and as a response you should see:

    //  client side response
    // { name: My fruit name, color:The color of the fruit}

edited Nov 6, 2019 at 18:59

ndonohoe

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answered Sep 14, 2017 at 3:23

robin is the true main hero

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3 Comments

james Over a year ago

This seems to work just fine and is more extensible if you add params later. I did a JSON.stringify on the client side when building the URL and a JSON.parse on the server in the routing.

robin is the true main hero Over a year ago

Ah, you're correct. I forgot to add JSON's .parse and .stringify to my suggested answer but I do the same too when passing an object as a parameter so I am sure that I am passing the correct form of the object as a string.

Edeph Over a year ago

Please explain to me how does this work? Giving a stringified JSON as parameter to a GET request. This seems like a really bad idea. If the JSON exceeds the GET char limit then what are you going to do ? Also if the JSON contains some value that breaks the URL encoding it will break (but that's easily fixable though).

MD SHAYON · Accepted Answer · 2021-10-08 11:00:41Z

7

Both of the way is correct you can use any of them First way

app.get('/fruit/:one/:two', function(req, res) {
    console.log(req.params.one, req.params.two)
});

Another way using & symbol

app.get('/fruit/:one&:two', function(req, res) {
    console.log(req.params.one, req.params.two)
});

edited Oct 8, 2021 at 11:00

answered Aug 21, 2021 at 11:07

MD SHAYON

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