{"id":191,"date":"2013-12-04T14:06:34","date_gmt":"2013-12-04T05:06:34","guid":{"rendered":"http:\/\/isitea.net\/wordpress\/?p=191"},"modified":"2013-12-04T14:06:34","modified_gmt":"2013-12-04T05:06:34","slug":"c-chrome-extension-app-communicate-using-port-sendnativemessage","status":"publish","type":"post","link":"https:\/\/isitea.net\/wordpress\/2013\/12\/04\/c-chrome-extension-app-communicate-using-port-sendnativemessage\/","title":{"rendered":"C# – Chrome extension \/ App communicate using port \/ sendNativeMessage"},"content":{"rendered":"

C#<\/p>\n

private static string OpenStandardStreamIn()
\n{
\n\/\/\/\/ We need to read first 4 bytes for length information
\nStream stdin = Console.OpenStandardInput();
\nint length = 0;
\nbyte[] bytes = new byte[4];
\nstdin.Read(bytes, 0, 4);
\nlength = System.BitConverter.ToInt32(bytes, 0);<\/p>\n

string input = “”;
\nfor (int i = 0; i < length;i++ )
\n{
\ninput += (char)stdin.ReadByte();
\n}<\/p>\n

return input;
\n}<\/p>\n

private static void OpenStandardStreamOut(string stringData)
\n{
\n\/\/\/\/ We need to send the 4 btyes of length information
\nint DataLength = stringData.Length;
\nStream stdout = Console.OpenStandardOutput();
\nstdout.WriteByte((byte)((DataLength >> 0) & 0xFF));
\nstdout.WriteByte((byte)((DataLength >> 8) & 0xFF));
\nstdout.WriteByte((byte)((DataLength >> 16) & 0xFF));
\nstdout.WriteByte((byte)((DataLength >> 24) & 0xFF));
\n\/\/Available total length : 4,294,967,295 ( FF FF FF FF )<\/p>\n

Console.Write(stringData);
\n}<\/p><\/blockquote>\n

“OpenStandardStremIn()”\u00a0returns a string which contains JSON type data.<\/p>\n

and OpenStandardStreamOut( string stringData ) must start with a string which belongs in JSON.<\/p>\n

 <\/p>\n

Chrome<\/p>\n

\/\/ Copyright 2013 The Chromium Authors. All rights reserved.
\n\/\/ Use of this source code is governed by a BSD-style license that can be
\n\/\/ found in the LICENSE file.<\/p>\n

var port = null;<\/p>\n

var getKeys = function(obj){
\nvar keys = [];
\nfor(var key in obj){
\nkeys.push(key);
\n}
\nreturn keys;
\n}
\nfunction appendMessage(text) {
\ndocument.getElementById(‘response’).innerHTML += “<p>” + text + “<\/p>”;
\n}<\/p>\n

function updateUiState() {
\nif (port) {
\ndocument.getElementById(‘connect-button’).style.display = ‘none’;
\ndocument.getElementById(‘input-text’).style.display = ‘block’;
\ndocument.getElementById(‘send-message-button’).style.display = ‘block’;
\n} else {
\ndocument.getElementById(‘connect-button’).style.display = ‘block’;
\ndocument.getElementById(‘input-text’).style.display = ‘none’;
\ndocument.getElementById(‘send-message-button’).style.display = ‘none’;
\n}
\n}<\/p>\n

function sendNativeMessage() {
\nmessage = {“text”: document.getElementById(‘input-text’).value};
\nport.postMessage(message);
\nappendMessage(“Sent message: <b>” + JSON.stringify(message) + “<\/b>”);
\n}<\/p>\n

function onNativeMessage(message) {
\nappendMessage(“Received message: <b>” + JSON.stringify(message) + “<\/b>”);
\n}<\/p>\n

function onDisconnected() {
\nappendMessage(“Failed to connect: ” + chrome.runtime.lastError.message);
\nport = null;
\nupdateUiState();
\n}<\/p>\n

function connect() {
\nvar hostName = “com.google.chrome.example.echo”;
\nappendMessage(“Connecting to native messaging host <b>” + hostName + “<\/b>”)
\nport = chrome.runtime.connectNative(hostName);
\nport.onMessage.addListener(onNativeMessage);
\nport.onDisconnect.addListener(onDisconnected);
\nupdateUiState();
\n}<\/p>\n

document.addEventListener(‘DOMContentLoaded’, function () {
\ndocument.getElementById(‘connect-button’).addEventListener(
\n‘click’, connect);
\ndocument.getElementById(‘send-message-button’).addEventListener(
\n‘click’, sendNativeMessage);
\nupdateUiState();
\n});<\/p><\/blockquote>\n

 <\/p>\n

Chrome extension \/ app side script comes from Chromium project NativeMessaging example<\/p>\n","protected":false},"excerpt":{"rendered":"

C# private static string OpenStandardStreamIn() { \/\/\/\/ We need to read first 4 bytes for length information Stream stdin = Console.OpenStandardInput(); int length = 0; byte[] bytes = new byte[4]; stdin.Read(bytes, 0, 4); length = System.BitConverter.ToInt32(bytes, 0); string input = “”; for (int i = 0; i < length;i++ ) { input += (char)stdin.ReadByte(); } […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-191","post","type-post","status-publish","format-standard","hentry","category-it"],"_links":{"self":[{"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/posts\/191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/comments?post=191"}],"version-history":[{"count":1,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/posts\/191\/revisions"}],"predecessor-version":[{"id":192,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/posts\/191\/revisions\/192"}],"wp:attachment":[{"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/media?parent=191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/categories?post=191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/isitea.net\/wordpress\/wp-json\/wp\/v2\/tags?post=191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}