Message passing between trusted page content and addon
Question
I'm unable to pass messages between a trusted page-worker script, and the addon.
main.js:
var pageWorkers = require("sdk/page-worker");
var self = require("sdk/self");
// Create a page worker that loads Wikipedia:
pageWorkers.Page({
contentURL: self.data.url("html/worker.html"),
onAttach: function(worker) {
console.log("within onAttach");
worker.port.on("message", function() {
console.log("Message received");
});
worker.port.on("message", function(message) {
console.log("Message received1");
});
},
onReady: function(worker) {
console.log("within onReady");
worker.port.on("message", function() {
console.log("Message received");
});
}
});
worker.html:
<html>
<head>
<script src="../js/worker.js"></script>
</head>
<body>
</body>
</html>
worker.js:
console.log("trying to emit message");
addon.port.emit("message");
addon.port.emit("message", "value");
console.log("tried to emit message");
In main.js, If I try the following outside of the pageWorkers.Page() call:
pageWorkers.port.on("message", function() {
console.log("Message received");
});
I get the following exception:
Message: TypeError: pageWorkers.port is undefined
Any help would be appreciated. I have tried using postMessages to no avail. If asked, I can add that code also.
1 answers
solution1
4 ACCPTED 2014-04-15 18:21:29
Page workers, like tab attaching and unlike pageMods, don't have an onAttach function. Nor do they have an onReady , since the contentScriptFile is automatically attached when the HTML is ready.
main.js
var worker = pageWorkers.Page({
contentURL: self.data.url("html/worker.html")
});
worker.port.on("message", function() {
console.log("Message received");
});
//If your events have the same name then they're the same event,
//irrespective of arguments passed
worker.port.on("message1", function(message) {
console.log("Message received1");
});
worker.js
console.log("trying to emit message");
addon.port.emit("message");
console.log("trying to emit message1");
addon.port.emit("message1", "value");
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