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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
const XPI_CONTENT_TYPE = "application/x-xpinstall";
const MSG_INSTALL_ADDON = "WebInstallerInstallAddonFromWebpage";
const lazy = {};
XPCOMUtils.defineLazyServiceGetters(lazy, {
ThirdPartyUtil: ["@mozilla.org/thirdpartyutil;1", "mozIThirdPartyUtil"],
});
export function amContentHandler() {}
amContentHandler.prototype = {
/**
* Handles a new request for an application/x-xpinstall file.
*
* @param aMimetype
* The mimetype of the file
* @param aContext
* The context passed to nsIChannel.asyncOpen
* @param aRequest
* The nsIRequest dealing with the content
*/
handleContent(aMimetype, aContext, aRequest) {
if (aMimetype != XPI_CONTENT_TYPE) {
throw Components.Exception("", Cr.NS_ERROR_WONT_HANDLE_CONTENT);
}
if (!(aRequest instanceof Ci.nsIChannel)) {
throw Components.Exception("", Cr.NS_ERROR_WONT_HANDLE_CONTENT);
}
let uri = aRequest.URI;
// This check will allow a link to an xpi clicked by the user to trigger the
// addon install flow, but prevents window.open or window.location from triggering
// an addon install even when called from inside a event listener triggered by
// user input.
if (
!aRequest.loadInfo.hasValidUserGestureActivation &&
Services.prefs.getBoolPref("xpinstall.userActivation.required", true)
) {
const error = Components.Exception(
`${uri.spec} install cancelled because of missing user gesture activation`,
Cr.NS_ERROR_WONT_HANDLE_CONTENT
);
// Report the error in the BrowserConsole, the error thrown from here doesn't
// seem to be visible anywhere.
Cu.reportError(error);
throw error;
}
aRequest.cancel(Cr.NS_BINDING_ABORTED);
let { loadInfo } = aRequest;
const { triggeringPrincipal } = loadInfo;
let browsingContext = loadInfo.targetBrowsingContext;
let sourceHost;
let sourceURL;
try {
sourceURL =
triggeringPrincipal.spec != "" ? triggeringPrincipal.spec : undefined;
sourceHost = triggeringPrincipal.host;
} catch (error) {
// Ignore errors when retrieving the host for the principal (e.g. data URIs return
// an NS_ERROR_FAILURE when principal.host is accessed).
}
let install = {
uri: uri.spec,
hash: null,
name: null,
icon: null,
mimetype: XPI_CONTENT_TYPE,
triggeringPrincipal,
callbackID: -1,
method: "link",
sourceHost,
sourceURL,
browsingContext,
hasCrossOriginAncestor: lazy.ThirdPartyUtil.isThirdPartyChannel(aRequest),
};
Services.cpmm.sendAsyncMessage(MSG_INSTALL_ADDON, install);
},
classID: Components.ID("{7beb3ba8-6ec3-41b4-b67c-da89b8518922}"),
QueryInterface: ChromeUtils.generateQI(["nsIContentHandler"]),
log(aMsg) {
let msg = "amContentHandler.js: " + (aMsg.join ? aMsg.join("") : aMsg);
Services.console.logStringMessage(msg);
dump(msg + "\n");
},
};