I'm trying to create an http server. The server is created correctly but does NOT show the html content. It works when I do it without listeners. What am I failing then?
app.js
var server = require("./server.js");
server.server3((req, res, html) => {
res.writeHead(200, {"Content-Type": "text/html"});
html.pipe(res);
res.end();
}, 3000, "./index.html");
server.js
function Server3(applyFunction, port, path) {
var fs = require("fs"),
html = fs.createReadStream(path.toString().trim()), // Create stream from path
http = require("http");
html.on("data", _ => {})
.on("end", () => { // create server when all data is ready
http.createServer(function(req, res){ // createServer method
applyFunction(req, res, html); // execute the function
}).listen(+port); // add the port
});
}
module.exports.server3 = Server3;
If you're just trying to create an HTTP server on node.js, using the express framework (npm install express --save) would simplify your life a great deal. If you place the index.html file in the same directory as app.js, you can create the server with the following 5 lines of code:
// Setup Express
const express = require("express");
const app = express();
// Use main directory to find HTML file
app.use(express.static(__dirname));
// Render index.html
app.get("/", (req, res) => res.render("index"));
// Start Server on port 3000
app.listen(3000, () => console.log('Server started on port 3000'));
Related
I'm on shared hosting and let's say my domain is example.com and I want to run a socket.io app in one folder called myapp so it can be accessed from here: example.com/myapp. Then I install node.js and put the app.js file right under example.com/myapp so whenever I access it I get the confirmation message: hello world node.js. The file looks like this:
const http = require('http')
const hostname = '127.0.0.1';
const port = 3000;
const server = http.createServer((req, res) => {
res.statusCode = 200;
res.setHeader('Content-Type', 'text/plain');
res.end('Hello world node.js \n');
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
next, I install the modules, inside the same folder: npm install express and npm install socket.io so I get a folder called node_modules directly under /myapp so the path will look like myapp/node_modules, right?
My question is, where do I put the files of my socket.io app (it's a chat)? The index.js file looks like this:
const app = require('express')();
const http = require('http').Server(app);
const io = require('socket.io')(http);
const port = process.env.PORT || 3000;
app.get('/', (req, res) => {
res.sendFile(__dirname + '/index.html');
});
io.on('connection', (socket) => {
socket.on('chat message', msg => {
io.emit('chat message', msg);
});
});
http.listen(port, () => {
console.log(`Socket.IO server running at http://localhost:${port}/`);
});
Should I put it in the same folder as app.js or somewhere else? Because if I put it along with app.js then this happens: if I access example.com/myapp I get the "hello world" page, which I don't want whereas in order to see the front page of my chat app I need to add a / like this: example.com/myapp/ but that is not accepted by cpanel as a valid application on the application manager. What's the right method to do this?
Thank you.
I am writing a server that is meant to serve and receive files. It is written in node.js, using express.js. I also have a client, also written in node, which is meant to send a request to the server and receive the files on the server.
Server-side
const express = require("express");
const app = express();
const file = "./samplefiles/Helloworld.txt";
app.get("/", (res)=>{
res.download(file);
});
module.exports = app; //this exports to server.js
const http = require("http");
const app = require("./app.js);
const port = 8080;
const server = http.createServer(app);
server.listen(port, () => {
console.clear();
console.log("server running");
})
Client-side
const request = require("request");
request.get("http://localhost:8080/", (req, body) => {
console.log(body);
console.log(res);
});
If I try to access it by my browser I am asked what I want to do with the file, it works. However, Is I run my client-side code it prints the body and the res(being null). I expected the file name and it's content to be in the body but only the content of the file was in the body.
I want to receive the whole file, is possible, or at least get the name of it so that I can "make" a copy of it on the client-side.
Change code your server side to:
const port = 8080;
const express = require("express");
const app = express();
const path = require('path');
app.get("/", function(req, res){
res.sendFile(path.join(__dirname, 'app.js'));
});
app.listen(port, () => {
console.clear();
console.log("server running");
});
Change code your client-side to:
var request = require('request');
request('http://localhost:8080/', function (error, response, body) {
console.log('error:', error); // Print the error if one occurred
console.log('statusCode:', response && response.statusCode); // Print the response status code if a response was received
console.log('body:', body); // Print data of your file
});
You need to install request npm i request for client side
You can serve up any files you want with express static method:
app.use(express.static('public'))
in this case just put all the files you want to serve in folder called public and then you can access it by localhost:8080/Helloworld.txt.
I ended up working around it.
I sent the file name as a header and was thus able to create a replica of the file I wanted to download using the body info and the filenameheader.
Follow on from this question: Axios can GET but not POST to the same URL
I've been trying to figure this out for too long now.
I want to POST from my React app to a .JSON file. Can anyone tell me what I'm doing wrong?
My AJAX POST function using axios always returns a 404. I'm listening for it on the node server but app.post never fires.
Thanks.
POST request from my React app:
postJson = (postJsonData) => {
axios.post('./postJson/', {
postJsonData
})
.then(function (response) {
console.log("success!");
console.log(response);
})
.catch(function (error) {
console.log(error);
});
}
app.js (node server):
/*========== Default Setup for node server copied from node website ==========*/
const http = require('http');
const hostname = '127.0.0.1';
const port = 3001;
const server = http.createServer((req, res) => {
res.statusCode = 200;
res.setHeader('Content-Type', 'text/plain');
res.end('Hello World\n');
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
/*========== Listen for POST (Trying to get the data from my REACT app
- will then assign it to "obj" below) ==========*/
var express = require("express");
var myParser = require("body-parser");
var app = express();
app.post("./postJson/", function(request, response) {
console.log("MURRRR");
console.log(request.body); //This prints the JSON document received (if it is a JSON document)
/*=== JSON Stuff ===*/
var jsonfile = require('jsonfile')
var file = './scene-setup.json'
var obj = {name: 'JP'}
jsonfile.writeFile(file, obj, function (err) {
console.error(err)
})
});
//Start the server and make it listen for connections on port 3000
app.listen(3000, function(){
console.log("server is listening to 3000");
});
Two things I noticed:
Your post endpoint doesn't need a leading "." I would make it just "/postJson"
Make sure you are posting to "http://localhost:3000/postJson"
Make sure you have the network tab open to see the actual URL you are requesting to.
Cheers
Turns out both react and my node server were running on localhost:3000 simultaneously which is apparently not okay.
Running my node server on localhost:3001 from a new command line window allowed me to do both at the same time.
Not sure how this would work when making a production build though.
I'm building a react app
In one component I'm writing this GET request which works:
In another component I'm writing this POST request:
Which then returns this 404 error:
And I have no idea how my GET works but my POST returns 404:not found when I'm requesting the same file both times?
UPDATE:
I'm running a node.js server now but it's a bit of a frankenstein's monster as this really isn't an area I have an understanding of. Does anyone know what I'm doing wrong?
// Server setup from node.js website
const http = require('http');
const hostname = '127.0.0.1';
const port = 3000;
const server = http.createServer((req, res) => {
res.statusCode = 200;
res.setHeader('Content-Type', 'text/plain');
res.end('Hello World\n');
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
// Trying to listen for data from React app to feed into JSON (broken)
var express = require("express");
var myParser = require("body-parser");
var app = express();
app.use(myParser.urlencoded({extended : true}));
app.post("/scene-setup.json", function(request, response) {
console.log(request.body); //This prints the JSON document received (if it is a JSON document)
});
app.listen(3001);
// Updating JSON file with "obj" (working)
var jsonfile = require('jsonfile')
var file = './scene-setup.json'
var obj = {name: 'JP'}
jsonfile.writeFile(file, obj, function (err) {
console.error(err)
})
Axios is used for making HTTP requests. So, you should have a backend server running that can handle these requests. I am not sure what exactly is the data that you want to save. If you need access to that data, should be saving it on the backend.
If you want to save some data just on the client side, HTML5 filesystem API might be something you want to look at. It can manage some data in the limited sandboxed part of user's filesystem.
I have a nodejs application where I have created project structure. package.json and index.js files, one json file also which I want that user can download it.
This is how my project structure
I have deployed nodejs application on heroku server. It is running perfectly, able to access index.js
How I can implement a functionality here so users can download swagger.json also. I tried to access this like https://heroku-address/swagger.json but it is showing only "Hello World"
index.js
var http = require("http");
http.createServer(function (request, response) {
// Send the HTTP header
// HTTP Status: 200 : OK
// Content Type: text/plain
response.writeHead(200, {'Content-Type': 'text/plain'});
// Send the response body as "Hello World"
response.end('Hello World\n');
}).listen(process.env.PORT);
Let's start with defining server and app variables,
var express = require('express')
var app = module.exports = express();
Now,To show a tags on which if users click file will be downloaded,below is code to show links,
app.get('/', function(req, res){
res.send('<ul>'
+ '<li> package.json.</li>'
+ '<li> swagger.json.</li>'
+ '</ul>');
});
Now,When user clicks on one of the above link then code shown below will be executed,and file will be downloaded,
app.get('/:file(*)', function(req, res, next){
var file = req.params.file
, path = __dirname + '/' + file;
res.download(path);
});
finally code for listening on port,
app.listen(8080);
console.log('Express started on port %d', 8080);
So,your full server.js file will look like,
var express = require('express')
, app = module.exports = express();
app.get('/', function(req, res){
res.send('<ul>'
+ '<li>Download package.json.</li>'
+ '<li>Download swagger.json.</li>'
+ '</ul>');
});
app.get('/:file(*)', function(req, res, next){
var file = req.params.file
, path = __dirname + '/' + file;
res.download(path);
});
app.listen(8080);
console.log('Express started on port %d', 8080);