chrome.runtime.onMessage在后台脚本中未定义(扩展名为chrome) [英] chrome.runtime.onMessage undefined in background script (chrome extension)
问题描述
我试图创建一个chrome扩展,但由于某些原因,有时chrome.runtime对象看起来不完整,并且缺少很多方法(包括onMessage,这是我想要的)。
有时它似乎起作用,有时不起作用。我认为它可能是一个时间相关的问题,但我不明白为什么我不能简单地在后台创建一个消息监听器?
我的后台脚本:
p> setTimeout(function(){
console.log(gogo!);
chrome.runtime。 onMessage.addListener(
function(request,sender,sendResponse){
console.log(sender.tab?
from a content script:+ sender.tab.url:$ b $ );
if(request.type ==tab){
console.log(tab!);
sendResponse({status:ok });
}
}),
2
});
其中chrome.runtime.onMessage未定义。
谢谢!
Edit2:我构建了一个更简单的原型,并且它再次失败。现在我真的很困惑。这是我的:
$ tree
。
├──manifest.json
├──src
│├──background.html
│├──background.js
│└──测试。 js
└──供应商
└──jquery.js
2个目录,5个文件
manifest.json文件:
{
manifest_version:2 ,
name:test,
description:test,
version:1.0,
author:测试,
homepage_url:http://www.test.com,
content_scripts:[
{
run_at:document_idle,
matches:[https://www.google*],
js:[vendor / jquery.js,src / test。 js]
}
],
background:{
page:src / background.html,
persistent :false
},
权限:[
标签,
https://www.google*
]
}
background.html文件:
< script src = ../供应商/的jquery.js >< /脚本>
< script src =background.js>< / script>
background.js文件:
function run(){
console.log(gogo!);
chrome.runtime.onMessage.addListener(
函数(request,sender,sendResponse){
console.log(sender.tab?$ b $from a content script:+ sender .tab.url:
from the extension);
if(request.type ==tab){
console.log(tab!);
sendResponse({status:ok});
}
});
}
run();
test.js文件:
'use strict';
run();
函数run(){
var url = window.location.href;
//错误如果没有URI
if(!url){
return 1;
}
var uriRe = /https:\/\/www\.google.*/;
var reParse = uriRe.exec(url);
if(!reParse){
return 2;
chrome.runtime.sendMessage({type:tab},function(response){
console.log(response);
});
}
我在OSX上使用Chrome 49.0.2623.112(64位)。
编辑:下面是屏幕截图:
我想再次精确地说,它不会一直失败(可能是50%的时间?),这使得它更加怪异我相信在某种我不知道的地方存在一种种族状况。
解决方案解决方案
问题解决了:我不得不禁用,然后重新启用我的所有其他分机。看起来像来自Chrome的错误。
I am trying to create a chrome extension, but for some reasons, sometimes, the chrome.runtime object seems incomplete, and a lot of methods are missing (including onMessage, which is the one I want).
It seems sometimes it works, sometimes not. I assumed it may be a time related issue, but I don't understand why I can't simply create a message listener on background?
My background script:
setTimeout(function () {
console.log("gogo!");
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
console.log(sender.tab ?
"from a content script:" + sender.tab.url :
"from the extension");
if (request.type == "tab") {
console.log("tab!");
sendResponse({status: "ok"});
}
}),
2
});
Where "chrome.runtime.onMessage" is undefined.
Thanks!
Edit2: I have built a much simpler prototype, and it's failing again. Now I am really confused. Here is what I have:
$tree
.
├── manifest.json
├── src
│ ├── background.html
│ ├── background.js
│ └── test.js
└── vendor
└── jquery.js
2 directories, 5 files
manifest.json file:
{
"manifest_version": 2,
"name": "test",
"description": "test",
"version": "1.0",
"author": "test",
"homepage_url": "http://www.test.com",
"content_scripts": [
{
"run_at" : "document_idle",
"matches": ["https://www.google*"],
"js": ["vendor/jquery.js", "src/test.js"]
}
],
"background": {
"page": "src/background.html",
"persistent": false
},
"permissions": [
"tabs",
"https://www.google*"
]
}
background.html file:
<script src="../vendor/jquery.js"></script>
<script src="background.js"></script>
background.js file:
function run () {
console.log("gogo!");
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
console.log(sender.tab ?
"from a content script:" + sender.tab.url :
"from the extension");
if (request.type == "tab") {
console.log("tab!");
sendResponse({status: "ok"});
}
});
}
run();
test.js file:
'use strict';
run();
function run() {
var url = window.location.href;
// Error if no URI
if (!url) {
return 1;
}
var uriRe = /https:\/\/www\.google.*/;
var reParse = uriRe.exec(url);
if (!reParse) {
return 2;
}
chrome.runtime.sendMessage({type: "tab"}, function(response) {
console.log(response);
});
}
I am using Chrome 49.0.2623.112 (64-bit) on OSX.
Edit: Here is a screenshot of what happens the times it fails:
I want to precise again that it doesn't fail all the time (maybe 50% of the time?), which makes it even more weird and makes me believe there is a kind of "race" condition somewhere I am not aware of.
Problem solved: I had to disable, then re-enable all my other extensions. Seems like a bug from Chrome.
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