I have a chrome extension. i need to analyse from the HTML source of the current page. i found here all kinds of solutions with background pages and content scripts but none helped me. here is what i have so far:
manifest.json:
{
"name": "Extension",
"version": "1.0",
"description": "Extension",
"browser_action": {
"default_icon": "bmarkred.ico",
"popup": "Test.html"
},
"content_scripts": [
{
"matches": ["http://*/*"],
"js": ["content.js"]
}
],
"background": {
"page": "backgroundPage.html"
},
"permissions": [
"cookies",
"tabs",
"http://*/*",
"https://*/*"
]
}
background.html:
<html>
<head>
<script type="text/javascript">
try {
chrome.tabs.getSelected(null, function (tab) {
chrome.tabs.sendRequest(tab.id, {action: "getSource"}, function(source) {
alert(source);
});
});
}
catch (ex) {
alert(ex);
}
</script>
</head>
</html>
content.js:
chrome.extension.onRequest.addListener(function(request, sender, callback) {
if (request.action == "getSource") {
callback(document.getElementsByTagName('html')[0].innerHTML);
}
});
The alert always alerts undefined. even if i change in the content.js file the callback function to:
callback('hello');
still the same result. What am i doing wrong? maybe im going at this the wrong way. whay i really need is this. When the user opens the extension popup (and only then), i need HTML of the current page so i can analyse it. any suggestions?
This question is related to
html
google-chrome-extension
Here is my solution:
chrome.runtime.onMessage.addListener(function(request, sender) {
if (request.action == "getSource") {
this.pageSource = request.source;
var title = this.pageSource.match(/<title[^>]*>([^<]+)<\/title>/)[1];
alert(title)
}
});
chrome.tabs.query({ active: true, currentWindow: true }, tabs => {
chrome.tabs.executeScript(
tabs[0].id,
{ code: 'var s = document.documentElement.outerHTML; chrome.runtime.sendMessage({action: "getSource", source: s});' }
);
});
Source: Stackoverflow.com