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Express - get value of path matching string

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0

Question

I've got several nested routers, and would like to get access to the whole string that the request's path matched. It's a little hard to say with english, so take a look at this code:

const express = require('express')
const app = express()
const router1 = express.Router()
const router2 = express.Router()

// set up router 2 paths
router2.get('/path2/:param2', (req, res, next) => 
 const someVar = req.something // the value I'll talk about in a second
 return res.status(200).send( someVar )
)

// set up router1 paths
router1.use('/path1/:param1', router2)

// connect the routers behind a base url
app.use('/api/v1', router1)

app.listen(3000, function () 
 console.log('Example app listening on port 3000!')
)

If I were to make a GET request with:

curl -X GET http://localhost:3000/api/v1/path1/myparam1/path2/myparam2

I want that to return an object like this:

 "someVar": "/api/v1/path1/:param1/path2/:param2"

Context

I have middleware in my app which logs the path to an elasticsearch cluster, and I'd like the cluster to group paths by the string they used to match the request, rather than the request itself. That way I can get a visual of which request endpoints are being hit the most.

node.js express

share|improve this question

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

add a comment | 

0

Question

I've got several nested routers, and would like to get access to the whole string that the request's path matched. It's a little hard to say with english, so take a look at this code:

const express = require('express')
const app = express()
const router1 = express.Router()
const router2 = express.Router()

// set up router 2 paths
router2.get('/path2/:param2', (req, res, next) => 
 const someVar = req.something // the value I'll talk about in a second
 return res.status(200).send( someVar )
)

// set up router1 paths
router1.use('/path1/:param1', router2)

// connect the routers behind a base url
app.use('/api/v1', router1)

app.listen(3000, function () 
 console.log('Example app listening on port 3000!')
)

If I were to make a GET request with:

curl -X GET http://localhost:3000/api/v1/path1/myparam1/path2/myparam2

I want that to return an object like this:

 "someVar": "/api/v1/path1/:param1/path2/:param2"

Context

I have middleware in my app which logs the path to an elasticsearch cluster, and I'd like the cluster to group paths by the string they used to match the request, rather than the request itself. That way I can get a visual of which request endpoints are being hit the most.

node.js express

share|improve this question

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

add a comment | 

Question

I've got several nested routers, and would like to get access to the whole string that the request's path matched. It's a little hard to say with english, so take a look at this code:

const express = require('express')
const app = express()
const router1 = express.Router()
const router2 = express.Router()

// set up router 2 paths
router2.get('/path2/:param2', (req, res, next) => 
 const someVar = req.something // the value I'll talk about in a second
 return res.status(200).send( someVar )
)

// set up router1 paths
router1.use('/path1/:param1', router2)

// connect the routers behind a base url
app.use('/api/v1', router1)

app.listen(3000, function () 
 console.log('Example app listening on port 3000!')
)

If I were to make a GET request with:

curl -X GET http://localhost:3000/api/v1/path1/myparam1/path2/myparam2

I want that to return an object like this:

 "someVar": "/api/v1/path1/:param1/path2/:param2"

Context

I have middleware in my app which logs the path to an elasticsearch cluster, and I'd like the cluster to group paths by the string they used to match the request, rather than the request itself. That way I can get a visual of which request endpoints are being hit the most.

node.js express

share|improve this question

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

const express = require('express')
const app = express()
const router1 = express.Router()
const router2 = express.Router()

// set up router 2 paths
router2.get('/path2/:param2', (req, res, next) => 
 const someVar = req.something // the value I'll talk about in a second
 return res.status(200).send( someVar )
)

// set up router1 paths
router1.use('/path1/:param1', router2)

// connect the routers behind a base url
app.use('/api/v1', router1)

app.listen(3000, function () 
 console.log('Example app listening on port 3000!')
)

curl -X GET http://localhost:3000/api/v1/path1/myparam1/path2/myparam2

 "someVar": "/api/v1/path1/:param1/path2/:param2"

share|improve this question

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

share|improve this question

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

asked Mar 22 at 3:40

CorbfonCorbfon

1,8161519

1 Answer
1

active

oldest

votes

0

// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var router1 = express.Router(mergeParams: true);

share|improve this answer

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok! That's a great answer to part of the question. What would I log, then, if I wanted to get access to the parameter matching string? e.g. /path1/:param1?
  
  – Corbfon
  Mar 22 at 5:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you can get the original url using "req.url"
  
  – Mahendra suthar
  Mar 22 at 6:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So in this case, if I implement the mergeParams option, req.url would return /api/v1/path1/myparam1/path2/myparam2 where I want the value used in express to match the path, /api/v1/path1/:param1/path2/:param2. Is there a way to get this without adding specialized middleware?
  
  – Corbfon
  Mar 22 at 20:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  mergeParams in no specialized midlleware..you can use "req.url" to get the full request path and mergeParams option is to preserve the req.params values from the parent router.
  
  – Mahendra suthar
  Mar 23 at 11:54
  

  
  
  
  

add a comment | 

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0

// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var router1 = express.Router(mergeParams: true);

share|improve this answer

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok! That's a great answer to part of the question. What would I log, then, if I wanted to get access to the parameter matching string? e.g. /path1/:param1?
  
  – Corbfon
  Mar 22 at 5:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you can get the original url using "req.url"
  
  – Mahendra suthar
  Mar 22 at 6:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So in this case, if I implement the mergeParams option, req.url would return /api/v1/path1/myparam1/path2/myparam2 where I want the value used in express to match the path, /api/v1/path1/:param1/path2/:param2. Is there a way to get this without adding specialized middleware?
  
  – Corbfon
  Mar 22 at 20:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  mergeParams in no specialized midlleware..you can use "req.url" to get the full request path and mergeParams option is to preserve the req.params values from the parent router.
  
  – Mahendra suthar
  Mar 23 at 11:54
  

  
  
  
  

add a comment | 

0

// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var router1 = express.Router(mergeParams: true);

share|improve this answer

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok! That's a great answer to part of the question. What would I log, then, if I wanted to get access to the parameter matching string? e.g. /path1/:param1?
  
  – Corbfon
  Mar 22 at 5:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you can get the original url using "req.url"
  
  – Mahendra suthar
  Mar 22 at 6:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So in this case, if I implement the mergeParams option, req.url would return /api/v1/path1/myparam1/path2/myparam2 where I want the value used in express to match the path, /api/v1/path1/:param1/path2/:param2. Is there a way to get this without adding specialized middleware?
  
  – Corbfon
  Mar 22 at 20:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  mergeParams in no specialized midlleware..you can use "req.url" to get the full request path and mergeParams option is to preserve the req.params values from the parent router.
  
  – Mahendra suthar
  Mar 23 at 11:54
  

  
  
  
  

add a comment | 

// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var router1 = express.Router(mergeParams: true);

share|improve this answer

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var router1 = express.Router(mergeParams: true);

share|improve this answer

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112

answered Mar 22 at 4:02

Mahendra sutharMahendra suthar

241112