node.js | 易学教程

Node.js multiple subdomains

阅读更多关于 Node.js multiple subdomains

问题 I am using node.js to build a multi-tenant application where different clients with their own subdomains will be accessing a single instance of my app. My questions is: Is there a way for the app to find out which subdomain a user is on? That way, I can route the user to the correct database schema (postgresql). Thanks in advance! Additional information: I am using the Express framework I'm not using multiple instances because I expect to have upwards of thousands of users and I don't want to

Moment.js 24-hour time format, dealing with the 24th hour

阅读更多关于 Moment.js 24-hour time format, dealing with the 24th hour

问题 I am using momentjs to check difference in minutes between two time stamps of a train trip. The API that I'm using to grab the data from returns times in 24 hours format (momentjs: HH:mm:ss). If the trip continues to the next day, the time is shown as, for example, "24:12:00" which is pretty weird. Momentjs can't deal with this, and if I try to calculate time difference with such values I get "NaN". So I created a function to convert any "24" occurrence to "00". function maintainHour

passport.authenticate - username and password are null

阅读更多关于 passport.authenticate - username and password are null

问题 this is probably some basic mistake but I am watching tutorial and even though I think I done everything exactly like I should after submitting login form I am redirected to the "failureRedirect" page. When I looked at source code in passport module I something. After this: Strategy.prototype.authenticate = function(req, options) { options = options || {}; var username = lookup(req.body, this._usernameField) || lookup(req.query, this._usernameField); var password = lookup(req.body, this.

How to Allow Form-Data in NodeJS

阅读更多关于 How to Allow Form-Data in NodeJS

问题 I recently created an API that accepts files. I am trying to test the API using Postman. If I make a post request using x-wwww-form-urlencoded body type, everything works and I get all the expected data. The only problem is that it does not allow to send a file. If I use form-data body type, that allows you to send files, I don't receive anything at the back-end. Not sure if something is wrong with Postman or if I am doing something wrong. My hunch is that the back-end doesn't accept form

How to securely store the Access-Token of a Discord(OAuth2) User?

阅读更多关于 How to securely store the Access-Token of a Discord(OAuth2) User?

问题 I'm struggling to find a way to securely save an Access-Token, which my web application retrieved from the DiscordAPI after the user authorized the application. I'm creating a web-interface for a Discord Bot. Here it is important, that not everyone can use it. Only server-moderators and such on a specific Discord server should be allowed to access most parts of the website. For this I'm using the OAuth2 stuff from Discord to retrieve an Access-Token with which I can get user info, such as

How to use tesseract.js on a base64 encoded image

阅读更多关于 How to use tesseract.js on a base64 encoded image

问题 I'm working on a personal project where I'm given a base64 string that is some image. I'm trying to run tesseract OCR on that image, however, I'm not sure how to do that. var base64String = 'data:image/jpg;base64,' + givenImage; var buffer = Buffer.from(base64String, 'base64'); var output = tesseract.recognize(buffer); return output; This doesn't seem to work at all and I'm not really sure why. This is run on a node.js server. 回答1: I think you're very nearly there. When parsing the base64

How to list all members from a specific server?

阅读更多关于 How to list all members from a specific server?

问题 My code is const list = client.guilds.find("id", "335507048017952771") for (user of list.users){ console.log(user[1].username); } This does literally nothing. There is no error or anything. I just want the bot to find a server and then log all members from said server. Displaying all connected users Discord.js The answers in this question didn't really help me at all. I did try using message.guild.users but that also did nothing. Can't seem to find anything on the Discord.js site to help me

How to use tesseract.js on a base64 encoded image

阅读更多关于 How to use tesseract.js on a base64 encoded image

Cannot start mongo db

阅读更多关于 Cannot start mongo db

问题 I have did the mongodb installation process mentioned in the following link https://docs.mongodb.com/manual/installation/ but i can't start the mongodb this is my log kindly tell me the possible way to start mongo db C:\>"C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe" 2017-03-12T12:42:55.378+0530 I CONTROL [initandlisten] MongoDB starting : pid=5 400 port=27017 dbpath=C:\data\db\ 64-bit host=vimals 2017-03-12T12:42:55.379+0530 I CONTROL [initandlisten] targetMinOS: Windows 7/W indows

nodejs npm cnpm vue-cli 环境初始化

阅读更多关于 nodejs npm cnpm vue-cli 环境初始化

windows 版安装下载安装安装 http://nodejs.cn/ 默认路径C:\Program Files\nodejs\ 验证配置命令行配置参数 npm config set prefix " D:\Program Files\nodejs\node_global " npm config set cache " D:\Program Files\nodejs\node_cache " 配置环境变量 NODE_PATH D:\Program Files\nodejs\node_global\node_modules 验证 npm install express -g 安装完成后D:\Program Files\nodejs\node_global\node_modules\express 有express目录命令验证查看path ，确认path已加载加载成功安装cnpm 安装 npm install -g cnpm --registry=https://registry.npm.taobao.org 环境变量添加 D:\Program Files\nodejs\node_global 测试 cnpm -v linux版环境安装 #todo vue-cli安装 npm install -g vue-cli 安装完测试vue命令正常安装vue init