Question

我创建了一个支持本机消息传递的chrome扩展。扩展程序正常运行，使用chrome：// apps运行扩展程序。现在我尝试从网页触发扩展程序，只有当我从chrome：// apps打开我的扩展程序时它才有用，但如果我没有打开扩展程序它就不起作用，而扩展程序安装在chrome中。

mainifest.json：

{

  "name": "Native Messaging Example",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Send a message to a native application.",
  "app": {
    "launch": {
      "local_path": "main.html"
    }
  },
  "icons": {
    "128": "icon-128.png"
  },
  "permissions": [
    "nativeMessaging"
  ],
  "content_scripts": [{ "matches": ["<all_urls>","http://*/*","https://*/*"], "js": ["contentscript.js"], "run_at": "document_start"}]
}

内容脚本：

document.addEventListener("hello", function(data) {
    chrome.runtime.sendMessage("test");
})

Background.js

 var port = null;
    var getKeys = function(obj){
       var keys = [];
       for(var key in obj){
          keys.push(key);
       }
       return keys;
    }


    function appendMessage(text) {
      document.getElementById('response').innerHTML += "<p>" + text + "</p>";
    }

    function updateUiState() {
      if (port) {
        document.getElementById('connect-button').style.display = 'none';
        document.getElementById('input-text').style.display = 'block';
        document.getElementById('send-message-button').style.display = 'block';
      } else {
        document.getElementById('connect-button').style.display = 'block';
        document.getElementById('input-text').style.display = 'none';
        document.getElementById('send-message-button').style.display = 'none';
      }
    }

    function sendNativeMessage() {
      message = {"text": document.getElementById('input-text').value};
      port.postMessage(message);
      appendMessage("Sent message: <b>" + JSON.stringify(message) + "</b>");
    }

    function onNativeMessage(message) {
      appendMessage("Received message: <b>" + JSON.stringify(message) + "</b>");
    }

    function onDisconnected() {
      appendMessage("Failed to connect: " + chrome.runtime.lastError.message);
      port = null;
      updateUiState();
    }

    function connect() {
      var hostName = "com.google.chrome.example.echo";
      appendMessage("Connecting to native messaging host <b>" + hostName + "</b>")
      port = chrome.runtime.connectNative(hostName);
      port.onMessage.addListener(onNativeMessage);
      port.onDisconnect.addListener(onDisconnected);
      updateUiState();
    }
    chrome.runtime.onMessage.addListener(function(message, sender, sendResponse) {
        alert("message received");

        var hostName = "com.google.chrome.example.echo";
      appendMessage("Connecting to native messaging host <b>" + hostName + "</b>")
      port = chrome.runtime.connectNative(hostName);
      port.onMessage.addListener(onNativeMessage);
      port.onDisconnect.addListener(onDisconnected);

    });


    document.addEventListener('DOMContentLoaded', function () {
      document.getElementById('connect-button').addEventListener(
          'click', connect);
      document.getElementById('send-message-button').addEventListener(
          'click', sendNativeMessage);
        chrome.runtime.sendMessage("test");
      updateUiState();
    });

page.html中

<html>
<head></head>
<body>
<script>
    var go = function() {
        var event = document.createEvent('Event');
        event.initEvent('hello');
        document.dispatchEvent(event);
    }
</script>
<a href="javascript:go();">Click me</a>
</body>
</html>

Chrome扩展程序：通过Chrome：// apps打开扩展程序，将信息从网页发送到Chrome扩展程序

0 个答案: