Param Pam Pam solution and explanations

Directions:

Create an Express.js server that takes a parameter from a browser’s request (in this case, it’s going to take a parameter from the request called ‘id’) and PUT it in a specified endpoint (in this case, PUT '/message/:id').

(So that if ‘id’ is ‘526aa677a8,’ the endpoint ends up like this:   ‘/message/526aa677a8’ )

Then, for your response, return the SHA1 hash of the current date

plus the sent ID (basically, take the current date plus the ID and encrypt all of it!)

Use SHA1 hash to encrypt stuff this way:

                                require('crypto')

                                  .createHash('sha1')

                                 .update(new Date().toDateString() + id)

                                .digest('hex')

Code:

var express = require('express')

var app = express();

app.put('/message/:id', function (req, res) {

                 var id = req.params.id // ‘params’ on the IncomingMessage object is ‘params: { id: '4b693a688d2115d70c6f1d95edac8651' }’

                // if you want to, do this to see the request from the browser:          var test1 = req      console.log(test1)

                 var str = require('crypto'). // Now, add it to the current date and encrypt everything

createHash('sha1').

update(new Date().

toDateString() + id).

digest('hex')

                 res.send(str)  // send the string of encrypted characters back to the client

})

app.listen(process.argv[2]) //OK, to get the ball rolling listen for requests here

OUTPUT:

‘1d408bcfd164a6c39dc07530c1505c353f103d98’  (yep, a bunch of gobbledygook-  because it’s encrypted!)