google chrome - Java + Native messaging doesn't work good -

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i have problem java application , google chrome due npapi deprecation.. reading articles , blogs, i've found "solution" : native messaging.

but examples made in c++/c#/python, , java there nothing.. if me this..

here's schema (see image): google chrome extension -> native messaging -> java app (jar)

problem: extension calls java app, java app runs doesn't receive , when returns, nothing comes extension.

here's code:

chrome extension

background.js:

chrome.runtime.onconnect.addlistener(function(port) {    port.onmessage.addlistener(    function(message) {	  	chrome.tabs.query({active: true, currentwindow: true}, function(tabs) {  		console.log( 'background.js received msg [' + message.text + ']');   		console.log( 'port.postmessage({content: "generated background.js"}); [' + tabs[0].id + "/" + tabs[0].url + ']');  		chrome.runtime.sendnativemessage('cnb.digitalsigning',message,function(response) {      console.log("received native " + response);    });  	  		chrome.tabs.sendmessage(tabs[0].id, {content: "generated background.js"});  	});  	return true;    });        port.ondisconnect.addlistener(function() {    console.log("background.js port disconnected");  });    });      //native messaging

content_script.js 

window.addeventlistener("message", function(event) {    // accept messages ourselves        if (event.source != window)      return;      if (event.data.type && (event.data.type == "digital_signer_msg")) {      console.log("content script received  webpage: " + event.data.text);  	console.log('calling port.postmessage(event.data.text); ...' + event.data.text );  	port = chrome.runtime.connect();	  	port.postmessage({text: event.data.text});    }  }, false);      chrome.runtime.onmessage.addlistener(    function(response, sender, sendresponse) {  	alert("receiving response extension" + response.content );    });

manifest.json 

{    "name": "test",    "description": "test",    "version": "0.1",    "manifest_version": 2,    "background": {  		"persistent" : true,        "scripts": ["background.js"]	      },    "content_scripts": [      {        "matches": ["*://*/*"],        "js": ["content_script.js"]      }    ],    "permissions": [             "nativemessaging"          ]  }

html

<html>  <script>  function myfunc(){    	console.log('call func');  	window.postmessage({ type: "digital_signer_msg", text: "do it, baby!" }, "*");  	console.log('func called');  }      </script>  <body>  <div>page</div>    <form>  <button  id="caller" onclick="myfunc()">call extension</button>  <div id="reponsediv" style="border: 3px; border-color: blue;">no response loaded</div>  </form>  </body>    </html>

host

installreg.bat

reg add "hkcu\software\google\chrome\nativemessaginghosts\digitalsigning" /ve /t reg_sz /d "%~dp0digitalsigning.json" /f    pause

launch.bat

c:\location\to\java\jre\bin\java.exe -cp c:\component\target\java.jar com.org.app  pause

digitalsigning.json

{    "name": "digitalsigning",    "description": "digitalsigning",    "path": "c:\\place\\launch.bat",    "type": "stdio",    "allowed_origins": [      "chrome-extension://<google extension id generated>/"    ]  }

the aplication contains main captures message using system.in.read , response extension using system.out.write..

how communication? correct way start java app?

at https://stackoverflow.com/a/25617143/865284 can see how send data in proper way. system.in should correct way, now, didn't find way receive data in java.


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