Node-red node for parsing pathparams in routes for RESTful Web Services

[Mike Hill]

Hello all,

New to Node/Node-Red. I had a hard time figuring out how to get Node-Red to return pathparams similar to the behavior in Express, basically returning key/value pairs on any route with parms defined starting with ":".

Since I couldn't find the answer quickly, build my own node to parse through the route and return key/value pairs in msg.req.route.parms. Probably a better way already exists, but I wanted to get my hands dirty in development and I need to use this functionality a lot...

Thought I'd publish my results and make it available in case it's useful to someone else...

node-red-contrib-route-parser

https://www.npmjs.com/package/node-red-contrib-route-parser.

Feedback appreciated.

Mike

[Nicholas O'Leary]

Hi Mike,

the msg.req object is the request object straight from Express (3.x) and msg.req.params is the object containing the url parameters you want.

Here's an example that shows it in action:

[{"id":"7ab6512d.8549b","type":"http in","name":"","url":"/api/test/:lastname/:firstname","method":"get","x":167,"y":58,"z":"dbf8b34b.24075","wires":[["6e08ecaa.91f714","5bfe7d89.a40184","8f07ac18.70f85"]]},{"id":"6e08ecaa.91f714","type":"http response","name":"","x":430,"y":124,"z":"dbf8b34b.24075","wires":[]},{"id":"5bfe7d89.a40184","type":"debug","name":"","active":true,"console":"false","complete":"req.params.lastname","x":489,"y":40,"z":"dbf8b34b.24075","wires":[]},{"id":"8f07ac18.70f85","type":"debug","name":"","active":true,"console":"false","complete":"req.params.firstname","x":489,"y":79,"z":"dbf8b34b.24075","wires":[]}]

Nick

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[Mike Hill]

Nick,

Thanks for the update. I can't believe I missed that. I looked through all of the objects and swear I couldn't find them... Anyway, I've created a redundant node... ;)

Should I pull it from NPM?

Mike

[Nicholas O'Leary]

No problem.... We do need to get some of this better documented, rather than just point at the express docs and leave the user to figure it out.

Up to you what to do with your node... hopefully the exercise of producing it was useful in itself.

Nick