json-line-protocol v0.0.3

JsonLineProtocol

A stream protocol handler for JSON-encoded values delimited by CRLF.

Installation

npm i json-line-protocol

Development

npm i json-line-protocol --devel
make test

Usage

var protocol = new(require('json-line-protocol').JsonLineProtocol)();

protocol.on('value', function (value) {
  console.log(util.inspect(value));
});

protocol.feed('{"say":"goodbye","who":"you"}\r\n{"say":"hello","who":"I"}\r\n{"cmd');
// note fragment at the end: {"cmd                                           ^^^^^

// then suddenly, the rest of the command arrives in another chunk!
protocol.feed('":"hey-la hey-hey-lo-la","who":"everybody"}\r\n');

Methods

new JsonLineProtocol(max_size)

max_size is the number of bytes fed input can be allowed to grow to before emitting an 'overflow' error.

feed(input)

input is a UTF-8 encoded string chunk. input does not have to contain a CRLF suffix; keep feeding the protocol instance as you receive data from a readable stream.

Events

value (parsed_value)

For each full line containing a JSON value is parsed.

error (error, line)

If a line is not valid JSON.

drain ()

When all fed input has been processed.

partial ()

When fed input contains a partial line after processing.

overflow ()

When fed input + previous partial input is larger than max_size.

Author

Brian Hammond brian@fictorial.com (http://fictorial.com)

License

Copyright (c) 2011 Fictorial LLC.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.