Node http 模块 - 拦截 http.request 函数时获取请求体

Question

I'm writing an internal logger that intercepts Node's http module by overriding the request method.
This is what I have so far:

const http = require('http');

const oldHttpRequest = http.request;
http.request = (options, callback) => {
    const newCallback = (res) => {
        // Do logging logic here

        return callback(res);
    }

    return oldHttpRequest(options, newCallback);
};

From options and res objects I'm able to retrieve everything I need (method, path, request headers, response headers, response body, etc..).
Everything but the outgoing request body.

What am I missing?

Answer 1

Managed to do it, posting the solution if anyone is interested.

I ended up having to monkey patch the write method as well:

const http = require('http');

const oldHttpRequest = http.request;

http.request = (options, callback) => {
    const requestBodyChunks = [];
    const newCallback = (res) => {
        // Do logging logic here
        console.log('Request body:', requestBodyChunks.join())

        return callback(res);
    }

    const clientRequest = oldHttpRequest(options, newCallback);
    const oldWrite = clientRequest.write.bind(clientRequest);

    clientRequest.write = (data: any) => {
        requestBodyChunks.push(data.toString());
        return oldWrite(data);
    };

    return clientRequest;
};