使用node-inspector调试节点src / http.js

Question

I'm having some bad luck debugging a node.js application. The problem is that I need to set a breakpoint in a file that isn't loaded at start (when --debug-blk) hits in. The file is http.js from node itself.

So I would like to modify the file to add a debugger; statement, but I'm unable to find this http.js file on my disk? The only place I see it on my disk is in the source distribution of node (lib/http.js). Where is this file located after a make install in node-src, and how can I set breakpoints inside it?

Answer 1

http.js is internal to the node executable. It doesn't exist on disk, and the only way to modify it is to build node from source.

Do this:

var http = require('http');
debugger;

// the rest of your app

Your app will start, load http, and then pause. Now you can use the inspector to set breakpoints inside http. (You won't need --debug-brk since the debugger statement will pause the app before anything really happens.)