When I run npm start I keep getting this error: I have reinstalled it, added nearly everything as an environmental variable and nothing has worked. I also cannot find anything like nodemon.app in my folders. My package.json: Answer Apologies Guys, turns out I had the wrong filename in my package.json, so it e…
Tag: node.js
Build Docker Image with Java and Node.js together (Error : java: not found )
I’ve an API application that run both node and java files(jar) together. When I run the application locally it works, but once I create a docker image for it, I got an error from the postman . I believe that I’m missing the jave configuration in docker file but I don’t know how to put the co…
I am have a problem reading some data using the serial.read() command
I am periodically reading the temperature and Humidity values from a DHT22 sensor in a green house tunnel. The sensor is attached to a Arduino Pro Mini. The Pro Mini also has a nF24l01 transceiver attached to it, and the readings are transmitted to another nF24L01/Arduino Pro Mini in my office. The Arduino is…
call/run function from Kotlin with Nodejs
I’ve wrote some lines of code in Kotlin now i want to execute this function from Javascrip or Nodejs is that possible? I only find solution for calling JS functions but not for calling Kotlin functions for example: JS: Kotlin: I heared from Kotlin/JS but there are some difrents from the normal JS and Ko…
Extract .jar file with NodeJS
I need to extract a JAR file using NodeJS and I have no idea how, also I’m not sure if StackOverFlow is the right place for this so sorry if it’s not. Answer so jar files are just java archive files that can be unzipped with any commonly available operating system tool like unzip or jar, so a simp…
Java Decrypt with NodeJS Encrypt padding and oaepHash
I need to decrypt some information coming from an external service built with NodeJS. This service ask for a RSA (2048) public key in pem format in base64, in order to encrypt the information. I am creating the key pair in Java: The external service is encrypting the information as follows and is returning th…
How can I use a child process to run a .class file from a parent directory?
In this case, I am using Node.js ChildProcess. Let’s say the application file (index.js, for example) is in folder1. This folder also has folder2, which is where the class file is. So, when I call spawn from folder1, the command’s current directory is folder1. However, I can’t do java ./fold…
Validating strings with Java and NodeJS
vo.getResultFun() and cod returns ‘G’ Java validation NodeJS isEqual Why NodeJS return the callback and Java don’t throws the exception? Answer The result of this js part : is false as the result of this java part: So there are several options : Validator.isNullUndefinedEmpty doesn’t w…
TypeError: expressJwt is not a function
I’m trying to write middleware for user authorization in my app. I use this function to check if a route requires being sign in. The code is as follows: However, I get the following error: What could be the problem? None of the other answers seem to be helpful. Answer With the curly brackets you are try…
How to create docker image with nodejs 12, java, gcc, g++,python3, monocs
I am trying to dockerize my NodeJs & Express API . In my API iam using https://www.npmjs.com/package/compile-run package to compile and run C, Cpp,Java,JavaScript(Node.js env), Python languages. This package requires all 5 compilers(gcc,g++,nodejs,python3,javac) installed on the server. If any compiler mi…