Chrome onBeforeSendHeaders not catching FTP request - google-chrome-extension

Question

I'm developing a chrome extension which will add Authorization headers to the requests.
For this I used onBeforeSendHeaders, but unfortunately it isn't working for FTP requests. I have given the permission in manifest and also in background
Manifest permissions says:
"permissions": [
"webRequest",
"webRequestBlocking",
"webNavigation",
"tabs",
"cookies",
"ftp://*/*",
"*://*/*"
]
and I used onBeforeSendHeaders like this:
chrome.webRequest.onBeforeSendHeaders.addListener(
function(details) {
if(details.url == "my_url"){
details.requestHeaders.push({'name':'Authorization','value':'my_value'});
return { requestHeaders: details.requestHeaders };
}
},
{urls: ['<all_urls>','ftp://*/*']},
[ 'blocking', 'requestHeaders']
);
callback(true);
}
And also if I fail to open FTP in Chrome; is there any other way, where I could open FTP in terminal or putty using a single command (something like ssh user#host -pw pass)?

Answer 1

onAuthRequired is the solution to it, and worked for me:
var target = "ftp://ftpurl/";
var myCredentials = {
username: "username",
password: "pass"
};
var pendingRequests = [];
// A request has completed.
// We can stop worrying about it.
function completed(requestDetails) {
console.log("completed: " + requestDetails.requestId);
var index = pendingRequests.indexOf(requestDetails.requestId);
if (index > -1) {
pendingRequests.splice(index, 1);
}
}
function provideCredentialsSync(requestDetails) {
// If we have seen this request before, then
// assume our credentials were bad, and give up.
if (pendingRequests.indexOf(requestDetails.requestId) != -1) {
console.log("bad credentials for: " + requestDetails.requestId);
return {cancel:true};
}
pendingRequests.push(requestDetails.requestId);
console.log("providing credentials for: " + requestDetails.requestId);
return {authCredentials: myCredentials};
}
chrome.webRequest.onAuthRequired.addListener(
provideCredentialsSync,
{urls: [target]},
["blocking"]
);
chrome.webRequest.onCompleted.addListener(
completed,
{urls: [target]}
);
chrome.webRequest.onErrorOccurred.addListener(
completed,
{urls: [target]}
);
}