how to monitor the network on node.js similar to chrome/firefox developer tools?
When developing client side javascript applications, the developer network panel is invaluable for debugging network issues:
How does a developer creating a NodeJS application monitor the network traffic from the nodejs application to a http/https server? For example how to debug the following network traffic?
var http = require('http');
var req = http.request ...
req.write ...
req.send()
My code is making a call to a third party https server, so I am unable to use wireshark or similar packet sniffing tools.
For more information, the problem I am trying to investigate is here.
EDIT:
Here are similar questions asking how to do the same thing in other languages:
- PYTHON: How can I see the entire HTTP request that's being sent by my Python application?
- JAVA: How to enable logging for apache commons HttpClient on Android
Use external HTTP Debugging tool. Your options include:
- node-http-proxy as seen in How do I use node.js http-proxy for logging HTTP traffic in a computer?
- middlefiddle written in node.js (but abandoned for 3 years now) https://github.com/mdp/middlefiddle
- mitmproxy - a CLI tool http://mitmproxy.org
- fiddler http://www.telerik.com/fiddler
- and many more - https://www.google.pl/search?q=HTTP+debugger
You fire up one of those, tell them where to route the traffic, and point your application at that debugging proxy instead of the real server.
If you only need to see URLs of outgoing traffic and what caused it, You can use debugging-aid
npm i -D debugging-aid
node --require debugging-aid/network app.js
Resulting console output may look like this:
[aid] network, outgoing to: http://example.com/
stack: at Agent.createSocket (_http_agent.js:234:26)
at Agent.addRequest (_http_agent.js:193:10)
at new ClientRequest (_http_client.js:277:16)
at Object.request (http.js:44:10)
at Request.start (myapp-path/node_modules/request/request.js:751:32)
at Request.end (myapp-path/node_modules/request/request.js:1511:10)
[aid] network, outgoing to: http://example.com/
stack: at Agent.createSocket (_http_agent.js:234:26)
at Agent.addRequest (_http_agent.js:193:10)
at new ClientRequest (_http_client.js:277:16)
at Object.request (http.js:44:10)
at get (myapp-path/node_modules/got/source/request-as-event-emitter.js:234:22)
at Immediate.<anonymous> (myapp-path/node_modules/got/source/request-as-event-emitter.js:305:10)
Disclaimer:
I'm the author of debugging-aid
This answer was written when debugging-aid was on version 0.2.1