Setting a node/express rest api with SQL Server - node.js

Question

I am trying to set a nodejs rest api with SQL Server. I managed to make my GET method to work, but the PUT doesn't respond at all. I call the PUT method with postman like this: http://localhost:8080/api/user/1?firstname=John. What I am doing wrong?
var express = require("express");
var bodyParser = require("body-parser");
var sql = require("mssql");
var app = express();
// Body Parser Middleware
app.use(bodyParser.json());
// CORS Middleware
app.use(function (req, res, next) {
// Enabling CORS
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Methods", "GET,HEAD,OPTIONS,POST,PUT");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, contentType,Content-Type, Accept, Authorization");
next();
});
// Setting up server
var server = app.listen(process.env.PORT || 8080, function () {
var port = server.address().port;
console.log("App now running on port", port);
});
// Initiallising connection string
var dbConfig = { ... };
//Function to connect to database and execute query
var executeQuery = function(res, query) {
new sql.ConnectionPool(dbConfig).connect().then(pool => {
return pool.request().query(query)
}).then(result => {
let rows = result.recordset
res.setHeader('Access-Control-Allow-Origin', '*')
res.status(200).json(rows);
sql.close();
}).catch(err => {
res.status(500).send({ message: "${err}"})
sql.close();
});
}
// GET API
app.get("/api/user/:id", function(req , res, next) {
var query = "Select * from TestTable where id= " + req.params.id;
executeQuery (res, query);
});
// PUT API
app.put("/api/user/:id", function(req , res, next) {
var query = "UPDATE TestTable SET firstname= " + req.body.firstname + " WHERE Id= " + req.params.id;
executeQuery (res, query);
});

Answer 1

Your request handler handles the body of the request.
app.put("/api/user/:id", function(req , res, next){
// req.body is the body of the request
// req.query is the query parameters in the URL ( like ?firstname=1 )
var query = "UPDATE TestTable SET firstname= " + req.body.firstname + " WHERE Id= " + req.params.id;
executeQuery (res, query);
});
In order for your request to work you need to provide a proper PUT request containing JSON body. A curl version would look like :
curl -H 'Content-Type: application/json' \
-X PUT \
-d '{"firstname": "John"}' \
http://localhost:8080/api/user/1