forked from humcycles/node-parsley
/
index.js
63 lines (55 loc) · 1.64 KB
/
index.js
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module.exports = function (stream, cb) {
return new Parser(stream, cb);
};
function Parser (stream, cb) {
var self = this;
self.stream = stream;
self.cb = cb;
self._onData = function (buf) {
self.execute(buf, 0, buf.length);
};
stream.on('data', self._onData);
this.mode = 'begin';
}
Parser.prototype.execute = function (buf, start, len) {
for (var i = start; i < len && i >= 0; ) {
i = this.modes[this.mode].call(this, buf, i, len - i);
if (i < 0) {
this.stream.removeListener('data', this._onData);
if (this.request) {
var err = new Error('error parsing ' + this.mode);
this.request.emit('error', err);
}
break;
}
}
};
Parser.prototype.upgrade = function () {
var self = this;
if (self.request
&& (self.mode === 'begin' || self.mode === 'method'
|| self.mode === 'url' || self.mode === 'versionBegin'
|| self.mode === 'version' || self.mode === 'headerField'
|| self.mode === 'headerValue')) {
self.mode = 'upgrade';
self.request.emit('upgrade');
}
else if (self.request) {
self.request.once('headers', function () {
self.mode = 'upgrade';
self.request.emit('upgrade');
});
}
else {
var cb = self.cb;
self.cb = function () {
cb.apply(this, arguments);
self.upgrade();
};
}
var ended = false;
self.stream.on('end', function () {
if (self.request) self.request.emit('end');
});
};
Parser.prototype.modes = require('./lib/modes');