While I've come across plenty of examples on how to create xhr requests from Firefox Add-ons, I'm currently exploring the new WebExtensions framework (where require and Components are undefined) and facing an issue with sending a simple XmlHttpRequest from within the extension.
It's important to mention that the ajax request is directed towards a completely different URL, however, the host has CORs enabled to allow all origins.
As soon as .send() method is triggered, I encounter the following error:
[Exception... "Failure" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: resource://gre/modules/ExtensionContent.jsm -> moz-extension://9ca18411-9a95-4fda-8184-9dcd3448a41a/myapp.js :: GM_xmlhttpRequest :: line 162" data: no]"1 whatsapp.js:166:9
The snippet of code in question is:
function GM_xmlhttpRequest(orders) {
try {
var oReq = new XMLHttpRequest();
oReq.addEventListener("load", function(a1, a2, a3) {
console.log('xhr.load: %s, %s, %s', a1, a2, a3);
});
// open synchronously
oReq.open(orders.method, orders.url, false);
// headers
for (var key in orders.headers) {
oReq.setRequestHeader(key, orders.headers[key]);
}
// send
var res = oReq.send(orders.data);
console.log('xhr result: %s', res);
} catch(e) {
debugger;
console.warn('could not send ajax request %s to %s, reason %s', orders.method, orders.url, e.toString());
}
}
I have granted webRequest permissions in my manifest.json file. Although I understand this may not be the root cause, I am struggling to pinpoint what is hindering the ajax request. Any insights or suggestions?
{
"manifest_version": 2,
"name": "MyApp",
"version": "1.0",
"description": "TestXHR",
"icons": {
"48": "icons/myapp-48.png"
},
"applications": {
"gecko": {
"id": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b8cbd7deccfd9caddf8ced1dfd1d4d9d6ccd9c8c8cb96dbd7d5">[email protected]</a>",
"strict_min_version": "45.0"
}
},
"content_scripts": [
{
"matches": ["*://web.myapp.com/*"],
"js": ["myapp.js"]
}
],
"permissions": [
"https://thehost.all-xhr-sent-here.net/*",
"webRequest"
]
}