jailed
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asvd
Basic example doesn't work
Sorry if this is due to a lack-of-understanding on my part, but I can't get this to work. I'm running it locally, and I've tried it in Chrome and Safari on Mac.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="jailed.js"></script>
</head>
<body>
<div id="content"></div>
<script>
var api = {
alert: alert
};
var pluginCode = "application.setInterface({\n";
pluginCode += "foo: function() {\n";
pluginCode += " application.remote.alert('hi');\n";
pluginCode += "}});"
console.log(pluginCode);
var plugin = new jailed.Plugin(pluginCode, api);
plugin.remote.foo();
</script>
<body>
</html>
Sorry. I should have specified. I get this Error message: Uncaught TypeError: Cannot read property 'foo' of null
And when I dump plugin into the console, remote's value is null.
I see, the plugin takes some time to initialize and it happens asynchronously. When you just created the Plugin instance with new jailed.Plugin(pluginCode, api);, the connection to the plugin is not yet ready at the same moment, so you cannot simply invoke plugin.remote.foo() right after creation.
Instead, use the whenConnected() one-off event to postpone the usage upon the plugin initialization. This can be achieved by replacing your last line of code with something like:
var start = function() {
plugin.remote.foo();
}
plugin.whenConnected(start);
That make sense, but this still doesn't work. The error is gone, but I neither get an alert nor the "started" message in the console.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="jailed.js"></script>
</head>
<body>
<div id="content"></div>
<script>
var api = {
alert: alert
};
var pluginCode = "application.setInterface({\n";
pluginCode += "foo: function() {\n";
pluginCode += " application.remote.alert('hi');\n";
pluginCode += "}});"
console.log(pluginCode);
var plugin = new jailed.Plugin(pluginCode, api);
plugin.whenConnected(function() {
console.log('started');
plugin.remote.foo();
});
</script>
<body>
</html>
- which version of jailed do you use? (from the release, or from the repo?)
- Does it work if launched from a web-server, and not locally? (I am not sure if it should work locally at all...)
I used 0.2.0.
I haven't tried it from a server. The documentation made it seem as if it could work as a client-only app, but maybe I misunderstood it.
It is indeed a client-only app, but there are some security restricitons of the browser arising when you launch it from a local filesystem. It should (in theory) work locally as well, otherwise there is a bug. Can you please try to use the recent sources from the repository, in order to see if the problem is not yet fixed?
The latest version still says it's 0.2.0. Did you make changes without bumping the number?
I just downloaded the distribution again and tried it on a different Mac. It doesn't work in Chrome, and no errors appear in the console.
It also doesn't work in Safari, but I see this: [Error] SyntaxError: DOM Exception 12: An invalid or illegal string was specified. (_pluginWeb.js, line 50)
Firefox: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can remove its sandboxing. index.html The character encoding of a framed document was not declared. The document may appear different if viewed without the document framing it.
The latest version still says it's 0.2.0. Did you make changes without bumping the number?
Yep, this is what I ment. There are a lot of changes committed to the repo but not yet released. Please go here: https://github.com/asvd/jailed and click "Download zip" button, you will get the fresh sources.
Another issue in your code: if you initialize a plugin out of a string, it should be DynamicPlugin, not a Plugin (which is used when code is stored in a file). Your example works for me locally with such a fix.
It may be obvious but in addition to jailed.js all other files from lib folder must be also available. If these files are around the basic example works.
