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http-parser-js

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    http-parser-js

A pure JS HTTP parser for node.


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Package description

What is http-parser-js?

The http-parser-js npm package is a pure JavaScript implementation of the HTTP parsing component of Node.js. It can be used as a drop-in replacement for the built-in http parser in Node.js, providing a way to parse HTTP messages (requests and responses) without relying on the native parser. This can be useful in environments where the native parser is not available or when a different parsing behavior is desired.

What are http-parser-js's main functionalities?

Parsing HTTP Requests

This code sample demonstrates how to use http-parser-js to parse an HTTP request. The parser object is created with the type HTTPParser.REQUEST, and callback functions are assigned to handle headers, body, and the completion of the message.

const httpParser = require('http-parser-js').HTTPParser;
const parser = new httpParser(httpParser.REQUEST);

parser[httpParser.kOnHeadersComplete] = function(headers, url) {
  // Use headers and url
};

parser[httpParser.kOnBody] = function(body) {
  // Use body
};

parser[httpParser.kOnMessageComplete] = function() {
  // Message is complete
};

// Simulate receiving data
const data = Buffer.from('GET / HTTP/1.1\r\nHost: example.com\r\n\r\n');
parser.execute(data);

Parsing HTTP Responses

This code sample shows how to parse an HTTP response using http-parser-js. The parser object is created with the type HTTPParser.RESPONSE, and callback functions are set up to process headers, body, and the end of the message.

const httpParser = require('http-parser-js').HTTPParser;
const parser = new httpParser(httpParser.RESPONSE);

parser[httpParser.kOnHeadersComplete] = function(headers, statusCode) {
  // Use headers and statusCode
};

parser[httpParser.kOnBody] = function(body) {
  // Use body
};

parser[httpParser.kOnMessageComplete] = function() {
  // Message is complete
};

// Simulate receiving data
const data = Buffer.from('HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\nHello World');
parser.execute(data);

Other packages similar to http-parser-js

Readme

Source

HTTP Parser

This library parses HTTP protocol for requests and responses. It was created to replace http_parser.c since calling C++ function from JS is really slow in V8.

This was further modified by Jimbly to be useable in parsing responses, specifically tested with the "request" module, and addresses issues such as corrupt HTTP headers, which would otherwise cause Node's parser to throw a fatal error (HPE_INVALID_HEADER_TOKEN).

Jan Schär (jscissr) made some bigger changes and added tests. This fixed some bugs and added many missing features.

This is packaged as a standalone npm module. To use in node, monkeypatch HTTPParser.

// 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 do 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.

License

MIT. See LICENSE.md

Keywords

FAQs

Last updated on 03 Feb 2018

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