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Node http2 - cannot read this.socket.readable

Freshabout 21 hours ago
Mar 14, 20260 views
Confidence Score55%
55%

Problem

Testing node's new http2 native module I couldn't get express to serve requests over http2, Using node master build with `--expose-http2` flag: [code block] When requesting /express the server crashed with the following error: [code block]

Error Output

Error: Cannot read property 'readable' of undefined

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1 Fix

Canonical Fix
Unverified Fix
New Fix – Awaiting Verification

Fix http2 Socket Readable Error in Express

Medium Risk

The error 'Cannot read property 'readable' of undefined' occurs because the http2 module in Node.js does not correctly initialize the socket object when using Express. This is likely due to the way the request and response objects are handled in the http2 context, which differs from the traditional http module. The Express framework may not be fully compatible with the http2 implementation without specific adjustments.

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  1. 1

    Install Required Packages

    Ensure that you have the latest version of Express and http2 packages installed, as they may contain necessary updates for compatibility.

    bash
    npm install express http2
  2. 2

    Modify Server Initialization

    Change the way the Express app is initialized to use the http2.createServer method instead of the standard http.createServer. This ensures that the server is set up to handle HTTP/2 requests properly.

    javascript
    const http2 = require('http2');
const express = require('express');
const app = express();

const server = http2.createServer(app);
  3. 3

    Handle HTTP/2 Specific Features

    Ensure that you handle HTTP/2 specific features such as streams and headers correctly in your Express routes. For example, you may need to use the 'stream' object to send responses.

    javascript
    app.get('/express', (req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello HTTP/2');
});
  4. 4

    Start the Server

    Start the server using the http2 server instance and ensure it listens on the desired port.

    javascript
    server.listen(3000, () => {
  console.log('HTTP/2 server listening on port 3000');
});
  5. 5

    Test the HTTP/2 Endpoint

    Use a tool like curl with HTTP/2 support or a browser that supports HTTP/2 to test the /express endpoint and ensure it responds correctly without crashing.

    bash
    curl -i --http2 http://localhost:3000/express

Validation

Confirm that the server starts without errors and that requests to the /express endpoint return the expected response without crashing. Additionally, check that the response headers indicate HTTP/2 usage.

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

expressnode.jsapiinvestigate