How to parse variables in querystring using Express?

问题

I have a request being sent to the server:

"/stuff?a=a&b=b&c=c"

Using express, how do I get these values?

I have tried the following...

app.get( "/stuff?:a&:b&:c", function( req, res ){});

...however it does not seem to recognize the route.

Thanks (in advance) for your help.

回答1:

It's not a good idea to use a query string inside a route.

In Express logic you need create a route for "/stuff". The query string will be available in req.query.

回答2:

You can declare your route directly with /stuff, then query parameters are accessible through req.query, which is a JSON object. Here's your example:

app.get("/stuff", function(req, res) {
    var a = req.query.a;
    ...
});

In your case, req.query is equal to:

{ a: 'a',
  b: 'b',
  c: 'c' }

In Express' documentation (either 4.x and 3.x) you can find additional examples: Express - req.query.

来源：https://stackoverflow.com/questions/14669669/how-to-parse-variables-in-querystring-using-express