Hii I have simple node server, with the following structure
myapp
-config
-default-json
-index.js
-package-lock.json
-package.json
Here is my part of my index.js
'use strict';
const
config = require('config'),
express = require('express'),
request = require('request'),
body_parser = require('body-parser'),
app = express().use(body_parser.json()); // creates express http server
// Sets server port and logs message on success
app.listen(process.env.PORT || 1337, () => console.log('webhook is listening'));
when I run node index.js I get the following error
internal/modules/cjs/loader.js:583
throw err;
^
Error: Cannot find module 'config'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object.<anonymous> (C:\xampp\htdocs\chat\index.js:13:14)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
what is wrong with my code?
I found solution by by installing config from npm
https://www.npmjs.com/package/config
follow the instruction above and it should work , it might help some one in future
You have to explicitly add the config module in your package.json:
"dependencies": {
"config": "version number"
}
https://www.npmjs.com/package/config
It means there is no config.js in your current location. Put the exact location of the config.js file..
Try,
config = require('./config/config'),
Related
I am using html-pdf NPM module to convert my html (bill.html) code to pdf file (bill.pdf), I have simple html with heading tag and exporting that html by fs module below
import { create } from 'html-pdf';
import fs from 'fs';
import path from 'path';
var html = fs.readFileSync(path.resolve(__dirname, "./bill.html"), 'utf8');
var options = { format: 'Letter' };
create(html, options).toFile('./bill.pdf', function(err, res) {
if (err) return console.log(err);
console.log(res);
});
And I am getting this error of 'phantomjs-prebuilt'
html-pdf: Failed to load PhantomJS module. Error: Cannot find module 'phantomjs-prebuilt'
Require stack:
- /home/hardy/Documents/personal/api/node_modules/html-pdf/lib/pdf.js
- /home/hardy/Documents/personal/api/node_modules/html-pdf/lib/index.js
- /home/hardy/Documents/personal/api/src/app.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
at Function.Module._load (internal/modules/cjs/loader.js:686:27)
at Module.require (internal/modules/cjs/loader.js:848:19)
at require (internal/modules/cjs/helpers.js:74:18)
at Object.<anonymous> (/home/hardy/Documents/personal/api/node_modules/html-pdf/lib/pdf.js:7:19)
at Module._compile (internal/modules/cjs/loader.js:955:30)
at Module._extensions..js (internal/modules/cjs/loader.js:991:10)
at Object.require.extensions.<computed> [as .js] (/home/hardy/Documents/personal/api/node_modules/babel-register/lib/node.js:152:7)
at Module.load (internal/modules/cjs/loader.js:811:32)
at Function.Module._load (internal/modules/cjs/loader.js:723:14) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/home/hardy/Documents/personal/api/node_modules/html-pdf/lib/pdf.js',
'/home/hardy/Documents/personal/api/node_modules/html-pdf/lib/index.js',
'/home/hardy/Documents/personal/api/src/app.js'
]
}
Debugger listening on ws://127.0.0.1:5858/508c0ea9-c495-4254-9b05-cd2fd3cd8ae3
For help, see: https://nodejs.org/en/docs/inspector
assert.js:374
throw err;
^
AssertionError [ERR_ASSERTION] [ERR_ASSERTION]: html-pdf: Failed to load PhantomJS module. You have to set the path to the PhantomJS binary using 'options.phantomPath'
at new PDF (/home/hardy/Documents/personal/api/node_modules/html-pdf/lib/pdf.js:38:3)
at createPdf (/home/hardy/Documents/personal/api/node_modules/html-pdf/lib/index.js:10:14)
at Object.<anonymous> (/home/hardy/Documents/personal/api/src/app.js:8:1)
at Module._compile (internal/modules/cjs/loader.js:955:30)
at loader (/home/hardy/Documents/personal/api/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.<computed> [as .js] (/home/hardy/Documents/personal/api/node_modules/babel-register/lib/node.js:154:7)
at Module.load (internal/modules/cjs/loader.js:811:32)
at Function.Module._load (internal/modules/cjs/loader.js:723:14)
at Function.Module.runMain (internal/modules/cjs/loader.js:1043:10)
at Object.<anonymous> (/home/hardy/Documents/personal/api/node_modules/babel-cli/lib/_babel-node.js:154:22) {
generatedMessage: false,
code: 'ERR_ASSERTION',
actual: undefined,
expected: true,
operator: '=='
}
Waiting for the debugger to disconnect...
As phantomjs-rebuilt is a deprecated
You can still install it forcefully and resolve the error.
Command - npm i phantomjs-prebuilt --force
In index.js I have
'use strict';
const config = require('./config');
In config.js I have
'use strict';
const config = new function() {
this.port = 3000;
this.redirectUri = "http://localhost:" + this.port + "/auth";
}
module.exports = config;
On x64 Windows running node v6.9.5 this runs fine.
On a Raspberry Pi Zero (Raspbian Pixel, ARM v6) running node 6.10.2 however, I get the following error:
module.js:590
throw err;
^
SyntaxError: /home/pi/pihas-api/config.json: Unexpected token ' in JSON at position 0
at Object.parse (native)
at Object.Module._extensions..json (module.js:587:27)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/home/pi/pihas-api/index.js:8:16)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
I know this is because I'm using 'use strict'; in config.js, but I'm wondering why it does work on Windows, and whether or not there's a way to get this to work on the Pi Zero as well.
JSON is not Javascript. You cannot "use strict"; in JSON.
After many tries, I am unnable to connect node.js to Neo4j installed in my computer. I am able to access both separately, and both work fine. I have install in my Node.js directory the Thingdom ('neo4j') module in the directory, but when require('neo4j') prints an error.
Image of my Node.js folder with Neo4j installed in modules
var neo4j = require("neo4j");
var db = new neo4j.GraphDatabase("http://localhost:7474");
var node = db.createNode({hello: 'world'}); // instantaneous, but...
node.save(function (err, node) { // ...this is what actually persists.
if (err) {
console.error('Error saving new node to database:', err);
} else {
console.log('Node saved to database with id:', node.id);
}
});
And when using in the cmd: "node index.js" it throws me this error:
C:\Users\RRamos\Documents\Projects\test-neo4j>node index.js
module.js:341
throw err;
^
Error: Cannot find module 'neo4j'
at Function.Module._resolveFilename (module.js:339:15)
at Function.Module._load (module.js:290:25)
at Module.require (module.js:367:17)
at require (internal/module.js:16:19)
at Object.<anonymous> (C:\Users\RRamos\Documents\Projects\test-neo4j\index.js:1:75)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)
at Function.Module._load (module.js:314:12)
at Function.Module.runMain (module.js:447:10)
I got the same problem. As there's no solution in this post, I just add mine.
After running $ npm init and $ npm install --save neo4j-driver, I copy and paste the neo4j example code in index.js:
var neo4j = require("neo4j");
var db = new neo4j.GraphDatabase('http://neo4j:<password>#localhost:7474');
And then I got the same error when running $ node index.js.
In my package.json, I found:
"dependencies": {
"neo4j-driver": "^1.1.0-M02"
}
It's neo4j-driver not neo4j. So replace it in index.js:
var neo4j = require("neo4j-driver");
var db = new neo4j.GraphDatabase('http://neo4j:<password>#localhost:7474');
Now you will get rid of the Cannot find module 'neo4j' error!
In addition, if you use the 1.1.0 version of neo4j-driver(for Neo4j 3.0.0+), you may get this error:
var db = new neo4j.GraphDatabase('http://neo4j:<password>#localhost:7474');
^
TypeError: neo4j.GraphDatabase is not a constructor
at Object.<anonymous> (D:\Codes\neo4j_test\server.js:2:10)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
at Function.Module._load (module.js:409:3)
at Module.runMain (module.js:575:10)
at run (bootstrap_node.js:352:7)
at startup (bootstrap_node.js:144:9)
at bootstrap_node.js:467:3
It seems neo4j.GraphDatabase is only available in older version of neo4j-driver.
Here's the up-to-date tutorial of neo4j-driver.
Use the following code instead:
var neo4j = require('neo4j-driver').v1;
var driver = neo4j.driver("bolt://localhost", neo4j.auth.basic("neo4j", "<password>"));
// Create a session to run Cypher statements in.
// Note: Always make sure to close sessions when you are done using them!
var session = driver.session();
// Run a Cypher statement, reading the result in a streaming manner as records arrive:
session
.run("MERGE (alice:Person {name : {nameParam} }) RETURN alice.name", { nameParam:'Alice' })
.subscribe({
onNext: function(record) {
console.log(record._fields);
},
onCompleted: function() {
// Completed!
session.close();
},
onError: function(error) {
console.log(error);
}
});
Ive allready read 3-4 topics on this here at stackoverflow, but i simply cant seem to run my node.
I Try to run:
node app.js local
and it returns:
Error: Cannot find module './config'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/Users/larsfalcon/Documents/lkrieger/git/testinggrounds/app.js:2:14)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
Before i run this command i do:
npm i
And it installs my packages, i can physicaly see in my node_modules that express is there, but even if i try run express in the CLI it says its not a bash so i assume its not installed somehow still?
here is a review of my 2 app.js and index.js files that i need to run my node.
App.js
var config = require('./config')();
http.createServer(app).listen(config.port, function(){
console.log('Express server listening on port ' + config.port);
});
index.js
var config = {
local: {
mode: 'local',
port: 3000
},
staging: {
mode: 'staging',
port: 4000
},
production: {
mode: 'production',
port: 5000
}
}
module.exports = function(mode) {
return config[mode || process.argv[2] || 'local'] || config.local;
}
What should i do?
So that means that there is no config.js in the same folder as the app.js.
UPDATE: you'll want require('./config/config').
I am new to node.js. I was trying a script which is using express module.
I have installed express, using,
npn install express
When I run the code I got the error
TypeError: Cannot read property 'handle' of undefined
at Function.app.use (c:\node_modules\express\lib\application.js:113:9)
at Object.<anonymous> (c:\node\uploadResize.js:13:6)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:901:3
How to solve this issue?
Here is my node script.
var http = require('http'), // Libraries
util = require('util'),
fs = require('fs'),
couch = require('cradle'),
connect = require('express'),
endsWith, // Internal Functions
determineMimeType,
upload;
connect()
.use(connect.bodyParser())
.use(upload)
.listen(3000);
upload = function (req, res, next) {
// function body
}
You need to assign upload a value before passing it to app.use
Use something like this:
var app = express();
app.configure(function() {
var hourMs = 1000*60*60;
app.use(express.static('c:\\node', { maxAge: hourMs }));
app.use(express.directory('c:\\node'));
app.use(express.errorHandler());
});
the code not is npm install express ??
then the dir node_modules in the same dir in witch you have your app
C:\node\node_modules
C:\node\app.js