node.js

问题 I'm writing a Node.js app to control a small drone. Here are the instructions from the SDK: Use Wi-Fi to establish a connection between the Tello and PC, Mac, or mobile device. Send Command & Receive Response Tello IP: 192.168.10.1 UDP PORT: 8889 <<-->> PC/Mac/Mobile Step 1: Set up a UDP client on the PC, Mac, or mobile device to send and receive message from the Tello via the same port. Step 2: Before sending any other commands, send 'command' to the Tello via UDP PORT 8889 to initiate SDK

问题 i am trying to pass a variable from jQuery to nodejs, but i am not getting the right results, nodejs returns [object Object]. how can it return a string variable on nodejs side. $('.test').click(function(){ var tsId = "Hello World"; alert(tsId); console.log(tsId); $.ajax({ 'type': 'post', 'data':tsId, 'url': '/test/testing', 'success': function (data) { alert(data); } }) }); router.post('/testing', function(req, res) { var tsID = req.body; console.log("stsID "+tsID );\\ outputs [object Object

问题 I have a text file. I need to read the file inside a function and return it as a JSON object. The following is throwing an error "Unexpected token V in JSON at position 0" . Server.js fs.readfile('result.txt', 'utf8', function(err,data) { if(err) throw err; obj = JSON.parse(data); console.log(obj); }); result.txt looks like the following VO1: 10 5 2 VO2: 5 3 2 I think I cannot use JSON.parse directly. How do I proceed? 回答1: Assuming the following: Every line is separated by a newline

问题 I have this scenario: I have a zip file for users to download but for each download, I want to include a 'readme' file with user specific content ( e.g. with user's name and download time ). I used archiver (zip-stream) module to zip and stream zipped content to the browser. The goal is to minimise CPU usage (i.e. zipping) and storage ( i.e. creating copy of the same zip). Here are some of the possible ways to achieve this with cons. Upon every download, make a copy of the original zip, and

问题 I have this scenario: I have a zip file for users to download but for each download, I want to include a 'readme' file with user specific content ( e.g. with user's name and download time ). I used archiver (zip-stream) module to zip and stream zipped content to the browser. The goal is to minimise CPU usage (i.e. zipping) and storage ( i.e. creating copy of the same zip). Here are some of the possible ways to achieve this with cons. Upon every download, make a copy of the original zip, and

问题 Looks as really simple task but it's difficult to find good example on it. So, the task is following: AWS lambda puts some message to AWS-SQS. Code of AWS lambda contains such line: var QUEUE_URL = 'https://sqs.us-west-2.amazonaws.com/ID/QUEUE_NAME';", In order to get rid of this code there are possible two options: Create query that will lookup this queue based on region and queue name SQS has predictable names; Create Cloud Formaion script and specify these dependencies there. Based on this

问题 I'm trying to write a script to reply to a tweet, using the twit npm module. However whenever I pass the in_reply_to_status_id_str or in_reply_to_status_id this seems to be ignored. Not sure what the issue is? T.get('search/tweets', { q: `golf since:2011-07-11`, count: 1 }).then(function (response) { const userName = response.data.statuses[0].user.screen_name; const tweetId = response.data.statuses[0].id_str; T.post('statuses/update', { in_reply_to_status_id_str: tweetId, status: `@${userName

问题 Is it possible to fork a child_process from an electron render process? I found some posts across the net, but there were no hint how helps me to get my code working. I created a module, that fork child processes. This code works, when I run this with cmd and under node. But when I try to integrate it in my electron app, I can not communicate with the child.send() method. // create fork const fork = require('child_process').fork; const fs = require('fs'); const img_path = [ 'path/to/an/image1

问题 I have a server running on Kubernetes to handle hourly processing jobs. Thinking of using a service to expose the pods, and using an (external) cron job to hit the load balancer so that kubernetes can autoscale to handle the higher load as required. However in implementation, if the cron job sends, say, 100 requests at the same time while there's only 1 pod, all the traffic will go to that pod whereas subsequently spun up pods will still not have any traffic to handle. How can I get around

问题 i'm learning how to use node.js with mysql. I've tried to find some good documentation but in vain. i'm at the point where I can get my mysql data displayed in my browser but I want to handle it through my index.html and a css file at some point. This is my app.js: // moduels var express = require('express'); var app = express(); var mysql = require('mysql'); var bodyParser = require('bodyParser') // app.use(express.static(__dirname + '/public')); app.use(bodyParser.urlencoded({extended: