A pure JS HTTP parser
npm install @achingbrain/http-parser-js> This is a fork of http-parser-js without the dependency on node:buffer and converted to ESM
This library parses HTTP protocol for requests and responses.
It was created to replace http_parser.c since calling C++ functions from JS is really slow in V8.
However, it is now primarily useful in having a more flexible/tolerant HTTP parser when dealing with legacy services that do not meet the strict HTTP parsing rules Node's parser follows.
This is packaged as a standalone npm module.
To use in node, monkeypatch HTTPParser.
``js
// Monkey patch before you require http for the first time.
process.binding('http_parser').HTTPParser = require('http-parser-js').HTTPParser;
var http = require('http');
// ...
`
Simply run npm test.
The tests are copied from node and mscedex/io.js, with some modifcations.
This should now be usable in any node application, it now supports (nearly) everything http_parser.c does while still being tolerant with corrupted headers, and other kinds of malformed data.
http-parser-js should work via monkey-patching on Node v6-v11, and v13-14.
Node v12.x renamed the internal http parser, and did not expose it for monkey-patching, so to be able to monkey-patch on Node v12, you must run node --http-parser=legacy file.js to opt in to the old, monkey-patchable http_parser binding.
While this module is intended to be used as a replacement for the internal Node.js parser, it can be used as a standalone parser. The standalone-example.js` demonstrates how to use the somewhat awkward API (coming from compatibility with the Node.js internals) to parse HTTP from raw Buffers.
MIT.
See LICENSE.md