chrome-native-messaging

I am implementing communication between a web page and a Mac application using Chrome's Native Messaging feature. All seems to go well until I make the javascript call to chrome.runtime.connectNative("my_native_host_app_name"), which produces the following error in the console: Error in event handler for runtime.onMessageExternal: Error connecting to native app: com.allinlearning.nmhforbrowserextension Stack trace: Error: Error connecting to native app: com.allinlearning.nmhforbrowserextension at Object.<anonymous> (extensions::runtime:189:11) at Function.target.(anonymous function)

Is it possible to create Chrome extension which can embed a program into Chrome? I mean something like old NPAPI plugins such as VLC player, java, etc... I found some native messaging examples, but every example is only for sending simple messages to control an external program. But for example IE Tab is using native messaging and their IE tab engine is running inside in Chrome... or does IE Tab use something else? Updated answer: So as pointed out in comments, it does obviously use native messaging; what I can't figure out is what they are doing. The project claims to be open source (and GPL)

I did write an chrome extension that calls this connect() function to connect to a local C++ program: function connect() { console.log("test1"); //port = chrome.extension.connectNative('com.a.chrome_interface'); port = chrome.runtime.connectNative('com.a.chrome_interface'); port.onMessage.addListener(onNativeMessage); port.onDisconnect.addListener(onDisconnected); console.log("test5"); } I can see the test1 in the Console, but afterwards I got the error Uncaught TypeError: undefined is not a function in the line port = chrome.runtime.connectNative('com.a.chrome_interface'); My extensions

I am trying Chrome Native Messaging API for Chrome extension. Manifest.json for native app: { "name": "app.native", "description": "Native Message API Test.", "path": "native.exe", "type": "stdio", "allowed_origins": ["chrome-extension://kembignchdjhopkkcolnamikcenaocdm/"] } Windows Registry value: HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\NativeMessagingHosts\app.native=D:\connectNative\manifest.json I also tried D:\\\\connectNative\\\\manifest.json And I add "nativeMessaging" to "permissions" in Chrome extension manifest.json. Native app cpp: #include <iostream> #include <string> #include

I have a native-app written in c++. I am able to send data from my native-app to chrome extension using How to send message FROM native app TO Chrome extension? But I am unable to figure out the other way. Chrome doc. states : Chrome starts each native messaging host in a separate process and communicates with it using standard input (stdin) and standard output (stdout). The same format is used to send messages in both directions: each message is serialized using JSON, UTF-8 encoded and is preceded with 32-bit message length in native byte order. how do I read/interpret data from stdin, sent