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emotic-cordova-plugin-tcp-sockets

v1.1.0

Published

This Cordova plugin provides JavaScript API, that allows you to communicate with server through TCP protocol. Currently we support these platforms: iOS, Android, WP8.

Downloads

6

Readme

emotic-cordova-plugin-tcp-sockets

This Cordova plugin provides JavaScript API, that allows you to communicate with server through TCP raw packages.

This is a fork of https://github.com/philipptrenz/cordova-plugin-tcp-sockets only to get a stable version

Installation

Install this plugin simply by:

cordova plugin add emotic-cordova-plugin-tcp-sockets

Sample usage

Here is simple example of how to connect to remote server, consume data from it and close the connection.

Create instance of Socket type:

var socket = new Socket();

Set data consumer, error and close handlers:

socket.onData = function(data) {
  // invoked after new batch of data is received (typed array of bytes Uint8Array)
};
socket.onError = function(errorMessage) {
  // invoked after error occurs during connection
};
socket.onClose = function(hasError) {
  // invoked after connection close
};

Connect to server someremoteserver.com, with port 1234:

socket.open(
  "someremoteserver.com",
  1234,
  function() {
    // invoked after successful opening of socket
  },
  function(errorMessage) {
    // invoked after unsuccessful opening of socket
  });

Send "Hello world" to server:

var dataString = "Hello world";
var data = new Uint8Array(dataString.length);
for (var i = 0; i < data.length; i++) {
  data[i] = dataString.charCodeAt(i);
}
socket.write(data);

Close the connection gracefully by sending FIN to server:

socket.shutdownWrite();  

or close the connection immediately:

socket.close();

API

Event handlers

onData: (data: Uint8Array) => void

Invoked after new batch of data is received by the client. Data are represented as typed array of bytes (Uint8Array).

onClose: (hasError: boolean) => void

Invoked after connection close. Native resources are released after this handler is invoked. Parameter hasError indicates whether connection was closed as a result of some error.

onError: (message: string) => void

Invoked when some error occurs during connection.

Properties

state: Socket.State

Provides state of the socket. It can have 4 values represented by Socket.State enum:

  • Socket.State.CLOSED
  • Socket.State.OPENING
  • Socket.State.OPENED
  • Socket.State.CLOSING

Initial state of socket is CLOSED. Invoking open method changes state to OPENING. If it's successfuly opened, it goes to OPENED state. If opening fails, it goes back to CLOSED. Socket goes to CLOSING state immediately after close method is called. When socket is closed (by the server or by calling close method), it goes to CLOSED state.

Example

Check if socket is connected:

if (socket.state == Socket.State.OPENED) {
  console.log("Socket is opened");
}

Methods

open(host, port, onSuccess?, onError?): void

Establishes connection with the remote host.

| parameter | type | description | | ----------- |-----------------------------|--------------| | host | string | Remote host/ip address | | port | number | Tcp port number | | onSuccess | () => void | Success callback - called after successfull connection to the remote host. (optional)| | onError | (message: string) => void | Error callback - called when some error occurs during connecting to the remote host. (optional)|

write(data, onSuccess?, onError?): void

Sends data to remote host.

| parameter | type | description | | ----------- |-----------------------------|--------------| | data | Uint8Array | Typed array of bytes, that will be written to output stream. | | onSuccess | () => void | Success callback - called after data are successfully written to the output stream. (optional)| | onError | (message: string) => void | Error callback - called when some error occurs during writing of data to the output stream. (optional)|

shutdownWrite(onSuccess?, onError?): void

Sends FIN to remote host and finishes data sending. You cannot call write method after you call shutdownWrite, otherwise onError callback (of write method) will be called.

| parameter | type | description | | ----------- |-----------------------------|--------------| | onSuccess | () => void | Success callback - called after sending of data is finished. (optional)| | onError | (message: string) => void | Error callback - called when some error occurs during this procedure. (optional)|

close(onSuccess?, onError?): void

Closes the connection. onClose event handler is called when connection is successfuly closed.

| parameter | type | description | | ----------- |-----------------------------|--------------| | onSuccess | () => void | Success callback, called after connection is successfully closed. onClose event handler is called before that callback. (optional)| | onError | (message: string) => void | Error callback, called when some error occurs during this procedure. (optional)|

BSD License

Copyright (c) 2015, Blocshop s.r.o. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by the Blocshop s.r.o..
  4. Neither the name of the Blocshop s.r.o. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY Blocshop s.r.o. ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.