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  # HTTP Parser 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'); // ... ``` ## Testing Simply run `npm test`. The tests are copied from node and mscedex/io.js, with some modifcations. ## Status 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. ### Node versions `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. ## Standalone usage 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`](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. ## License MIT. See [LICENSE.md](LICENSE.md)