Node.js : Express app.get with multiple query para

问题:

I want to query the yelp api, and have the following route:

app.get("/yelp/term/:term/location/:location", yelp.listPlaces)

When I make a GET request to

http://localhost:3000/yelp?term=food&location=austin,

I get the error

Cannot GET /yelp?term=food&location=austin

What am I doing wrong?

回答1:

Have you tried calling it like this?

http://localhost:30000/yelp/term/food/location/austin

The URL you need to call usually looks pretty much like the route, you could also change it to:

/yelp/:location/:term

To make it a little prettier:

http://localhost:30000/yelp/austin/food

回答2:

In the requested url http://localhost:3000/yelp?term=food&location=austin

• base url/address is localhost:3000
• route used for matching is /yelp
• querystring url-encoded data is ?term=food&location=austin i.e. data is everything after ?

Query strings are not considered when peforming these matches, for example "GET /" would match the following route, as would "GET /?name=tobi".

So you should either :

• use app.get("/yelp") and extract the term and location from req.query like req.query.term
• use app.get("/yelp/term/:term/location/:location") but modify the url accordingly as luto described.

回答3:

I want to add to @luto's answer. There is no need to define query string parameters in the route. For instance the route /a will handle the request for /a?q=value.

The url parameters is a shortcut to define all the matches for a pattern of route so the route /a/:b will match

1. /a/b
2. /a/c
3. /a/anything

it wont match

/a/b/something or /a