How to limit upload file size in express.js
Express uses connect middleware, you can specify the file upload size by using the following app.use(express.limit(‘4M’)); Connect Limit middleware
node.js
How to convert PHP regex to JavaScript regex
Nothing really special. PHP regex syntax is very much the same as in JavaScript: str = str.replace(/\(\d*\)|\/\(P\)\//g, “”); You can find more information about regular expressions in JavaScript in this manual from MDN: https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Regular_Expressions.
Node JS fs module inside browser
That’s right, exports is node-specific JS (used to make part of your module available outside the module) and isn’t supported by web-browsers. Even though NodeJS is technically JS, there are client specific properties (like the window property for browsers, and exports for NodeJS apps) that can’t be interchanged. That said, here’s a client side JS … Read more
Cannot create a string longer than 0x1fffffe8 characters in JSON.parse?
0x1fffffe8 is exactly 512MB. The many commenters are correct: you are bumping up against a system limit. I agree with @Pointy that it is mostly likely a Node string length limit. fs-extra has nothing to do with the limit In any case, you’re going to have to process that JSON in chunks. Below are different … Read more
INSERT INTO fails with node-mysql
Pay attention to the documentation of node-mysql: If you paid attention, you may have noticed that this escaping allows you to do neat things like this: var post = {id: 1, title: ‘Hello MySQL’}; var query = connection.query(‘INSERT INTO posts SET ?’, post, function(err, result) { // Neat! }); console.log(query.sql); // INSERT INTO posts SET … Read more
Create unique autoincrement field with mongoose [duplicate]
const ModelIncrementSchema = new Schema({ model: { type: String, required: true, index: { unique: true } }, idx: { type: Number, default: 0 } }); ModelIncrementSchema.statics.getNextId = async function(modelName, callback) { let incr = await this.findOne({ model: modelName }); if (!incr) incr = await new this({ model: modelName }).save(); incr.idx++; incr.save(); return incr.idx; }; const … Read more
How do I render an EJS template file in Node.js?
There is a function in EJS to render files, you can just do: ejs.renderFile(__dirname + ‘/template.ejs’, function(err, data) { console.log(err || data); }); Source: Official EJS documentation
body-parser – extended option (qs vs querystring)
The reason for this message is that body-parser is about to change default value for extended from true to false. Extended protocol uses qs library to parse x-www-form-urlencoded data. The main advantage of qs is that it uses very powerful serialization/deserialization algorithm, capable of serializing any json-like data structure. But web-browsers don’t normally use this … Read more
Express.js Routing error: Can’t set headers after they are sent
You need to add the ‘return’ so that you don’t reply twice. // save post and check for errors post.save(function(err) { if (err) { return res.send(); } res.json({ message: ‘post created!’ }); });
Approach to multiple MySQL queries with Node.js
One should avoid the pyramid of doom: var express = require(‘express’); var Q = require(‘Q’); var app = express(); app.get(“https://stackoverflow.com/”,function(req,res){ var mysql = require(‘mysql’); var connection = mysql.createConnection({ host : ‘localhost’, user : ‘root’, password : ” }); connection.connect(); function doQuery1(){ var defered = Q.defer(); connection.query(‘SELECT 1 AS solution’,defered.makeNodeResolver()); return defered.promise; } function doQuery2(){ var … Read more