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'use strict';
const FreeList = require('internal/freelist').FreeList;
const HTTPParser = process.binding('http_parser').HTTPParser;
const incoming = require('_http_incoming');
const IncomingMessage = incoming.IncomingMessage;
const readStart = incoming.readStart;
const readStop = incoming.readStop;
const debug = require('util').debuglog('http');
exports.debug = debug;
exports.CRLF = '\r\n';
exports.chunkExpression = /chunk/i;
exports.continueExpression = /100-continue/i;
exports.methods = HTTPParser.methods;
const kOnHeaders = HTTPParser.kOnHeaders | 0;
const kOnHeadersComplete = HTTPParser.kOnHeadersComplete | 0;
const kOnBody = HTTPParser.kOnBody | 0;
const kOnMessageComplete = HTTPParser.kOnMessageComplete | 0;
// Only called in the slow case where slow means
// that the request headers were either fragmented
// across multiple TCP packets or too large to be
// processed in a single run. This method is also
// called to process trailing HTTP headers.
function parserOnHeaders(headers, url) {
// Once we exceeded headers limit - stop collecting them
if (this.maxHeaderPairs <= 0 ||
this._headers.length < this.maxHeaderPairs) {
this._headers = this._headers.concat(headers);
}
this._url += url;
}
// `headers` and `url` are set only if .onHeaders() has not been called for
// this request.
// `url` is not set for response parsers but that's not applicable here since
// all our parsers are request parsers.
function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
url, statusCode, statusMessage, upgrade,
shouldKeepAlive) {
var parser = this;
if (!headers) {
headers = parser._headers;
parser._headers = [];
}
if (!url) {
url = parser._url;
parser._url = '';
}
parser.incoming = new IncomingMessage(parser.socket);
parser.incoming.httpVersionMajor = versionMajor;
parser.incoming.httpVersionMinor = versionMinor;
parser.incoming.httpVersion = versionMajor + '.' + versionMinor;
parser.incoming.url = url;
var n = headers.length;
// If parser.maxHeaderPairs <= 0 assume that there's no limit.
if (parser.maxHeaderPairs > 0)
n = Math.min(n, parser.maxHeaderPairs);
parser.incoming._addHeaderLines(headers, n);
if (typeof method === 'number') {
// server only
parser.incoming.method = HTTPParser.methods[method];
} else {
// client only
parser.incoming.statusCode = statusCode;
parser.incoming.statusMessage = statusMessage;
}
parser.incoming.upgrade = upgrade;
var skipBody = false; // response to HEAD or CONNECT
if (!upgrade) {
// For upgraded connections and CONNECT method request, we'll emit this
// after parser.execute so that we can capture the first part of the new
// protocol.
skipBody = parser.onIncoming(parser.incoming, shouldKeepAlive);
}
return skipBody;
}
// XXX This is a mess.
// TODO: http.Parser should be a Writable emits request/response events.
function parserOnBody(b, start, len) {
var parser = this;
var stream = parser.incoming;
// if the stream has already been removed, then drop it.
if (!stream)
return;
var socket = stream.socket;
// pretend this was the result of a stream._read call.
if (len > 0 && !stream._dumped) {
var slice = b.slice(start, start + len);
var ret = stream.push(slice);
if (!ret)
readStop(socket);
}
}
function parserOnMessageComplete() {
var parser = this;
var stream = parser.incoming;
if (stream) {
stream.complete = true;
// Emit any trailing headers.
var headers = parser._headers;
if (headers) {
parser.incoming._addHeaderLines(headers, headers.length);
parser._headers = [];
parser._url = '';
}
// For emit end event
stream.push(null);
}
// force to read the next incoming message
readStart(parser.socket);
}
var parsers = new FreeList('parsers', 1000, function() {
var parser = new HTTPParser(HTTPParser.REQUEST);
parser._headers = [];
parser._url = '';
// Only called in the slow case where slow means
// that the request headers were either fragmented
// across multiple TCP packets or too large to be
// processed in a single run. This method is also
// called to process trailing HTTP headers.
parser[kOnHeaders] = parserOnHeaders;
parser[kOnHeadersComplete] = parserOnHeadersComplete;
parser[kOnBody] = parserOnBody;
parser[kOnMessageComplete] = parserOnMessageComplete;
return parser;
});
exports.parsers = parsers;
// Free the parser and also break any links that it
// might have to any other things.
// TODO: All parser data should be attached to a
// single object, so that it can be easily cleaned
// up by doing `parser.data = {}`, which should
// be done in FreeList.free. `parsers.free(parser)`
// should be all that is needed.
function freeParser(parser, req, socket) {
if (parser) {
parser._headers = [];
parser.onIncoming = null;
if (parser.socket)
parser.socket.parser = null;
parser.socket = null;
parser.incoming = null;
if (parsers.free(parser) === false)
parser.close();
parser = null;
}
if (req) {
req.parser = null;
}
if (socket) {
socket.parser = null;
}
}
exports.freeParser = freeParser;
function ondrain() {
if (this._httpMessage) this._httpMessage.emit('drain');
}
function httpSocketSetup(socket) {
socket.removeListener('drain', ondrain);
socket.on('drain', ondrain);
}
exports.httpSocketSetup = httpSocketSetup;
/**
* Verifies that the given val is a valid HTTP token
* per the rules defined in RFC 7230
**/
const token = /^[a-zA-Z0-9_!#$%&'*+.^`|~-]+$/;
function checkIsHttpToken(val) {
return typeof val === 'string' && token.test(val);
}
exports._checkIsHttpToken = checkIsHttpToken;
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