When you start playing around with custom request headers you will get a CORS preflight. This is a request that uses the HTTP OPTIONS verb and includes several headers, one of which being Access-Control-Request-Headers listing the headers the client wants to include in the request. You need to reply to that CORS preflight with the … Read more
I think you’re conflating the use of the response object with that of the request. The response object is for sending the HTTP response back to the calling client, whereas you are wanting to access the body of the request. See this answer which provides some guidance. If you are using valid JSON and are … Read more
In Postman of the 3 options available for content type select “X-www-form-urlencoded” and it should work. Also to get rid of error message replace: app.use(bodyParser.urlencoded()) With: app.use(bodyParser.urlencoded({ extended: true })); See https://github.com/expressjs/body-parser The ‘body-parser’ middleware only handles JSON and urlencoded data, not multipart As @SujeetAgrahari mentioned, body-parser is now inbuilt with express.js. Use app.use(express.json()); to … Read more
Change this.foo() to module.exports.foo()
You might have guessed it already: it’s a connection error. “ECONNRESET” means the other side of the TCP conversation abruptly closed its end of the connection. This is most probably due to one or more application protocol errors. You could look at the API server logs to see if it complains about something. But since … Read more
It looks like you might not have defined a start script in your package.json file or your project does not contain a server.js file. If there is a server.js file in the root of your package, then npm will default the start command to node server.js. https://docs.npmjs.com/misc/scripts#default-values You could either change the name of your … Read more
Express 4.x To get a URL parameter’s value, use req.params app.get(‘/p/:tagId’, function(req, res) { res.send(“tagId is set to ” + req.params.tagId); }); // GET /p/5 // tagId is set to 5 If you want to get a query parameter ?tagId=5, then use req.query app.get(‘/p’, function(req, res) { res.send(“tagId is set to ” + req.query.tagId); }); … Read more
Update Express has a helper for this to make life easier. app.get(‘/download’, function(req, res){ const file = `${__dirname}/upload-folder/dramaticpenguin.MOV`; res.download(file); // Set disposition and send it. }); Old Answer As far as your browser is concerned, the file’s name is just ‘download’, so you need to give it more info by using another HTTP header. res.setHeader(‘Content-disposition’, … Read more
The app object is instantiated on creation of the Express server. It has a middleware stack that can be customized in app.configure()(this is now deprecated in version 4.x). To setup your middleware, you can invoke app.use(<specific_middleware_layer_here>) for every middleware layer that you want to add (it can be generic to all paths, or triggered only … Read more
Current versions of Windows use Powershell as the default shell, so use: $env:NODE_ENV=”production” Per @jsalonen’s answer below. If you’re in CMD (which is no longer maintained), use set NODE_ENV=production This should be executed in the command prompt where you intend to run your Node.js application. The above line would set the environment variable NODE_ENV for … Read more