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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Dumping ground for simple services for which the isolation of a full global
* is overkill. Be careful about namespace pollution, and be mindful about
* importing lots of JSMs in global scope, since this file will almost certainly
* be loaded from enough callsites that any such imports will always end up getting
* eagerly loaded at startup.
*/
/* globals WebExtensionPolicy */
import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
NetUtil: "resource://gre/modules/NetUtil.sys.mjs",
});
XPCOMUtils.defineLazyServiceGetter(
lazy,
"streamConv",
"@mozilla.org/streamConverters;1",
"nsIStreamConverterService"
);
const ArrayBufferInputStream = Components.Constructor(
"@mozilla.org/io/arraybuffer-input-stream;1",
"nsIArrayBufferInputStream",
"setData"
);
/*
* This class provides a stream filter for locale messages in CSS files served
* by the moz-extension: protocol handler.
*
* See SubstituteChannel in netwerk/protocol/res/ExtensionProtocolHandler.cpp
* for usage.
*/
export function AddonLocalizationConverter() {}
AddonLocalizationConverter.prototype = {
QueryInterface: ChromeUtils.generateQI(["nsIStreamConverter"]),
FROM_TYPE: "application/vnd.mozilla.webext.unlocalized",
TO_TYPE: "text/css",
checkTypes(aFromType, aToType) {
if (aFromType != this.FROM_TYPE) {
throw Components.Exception(
"Invalid aFromType value",
Cr.NS_ERROR_INVALID_ARG,
Components.stack.caller.caller
);
}
if (aToType != this.TO_TYPE) {
throw Components.Exception(
"Invalid aToType value",
Cr.NS_ERROR_INVALID_ARG,
Components.stack.caller.caller
);
}
},
// aContext must be a nsIURI object for a valid moz-extension: URL.
getAddon(aContext) {
// In this case, we want the add-on ID even if the URL is web accessible,
// so check the root rather than the exact path.
let uri = Services.io.newURI("/", null, aContext);
let addon = WebExtensionPolicy.getByURI(uri);
if (!addon) {
throw new Components.Exception(
"Invalid context",
Cr.NS_ERROR_INVALID_ARG
);
}
return addon;
},
convertToStream(aAddon, aString) {
aString = aAddon.localize(aString);
let bytes = new TextEncoder().encode(aString).buffer;
return new ArrayBufferInputStream(bytes, 0, bytes.byteLength);
},
convert(aStream, aFromType, aToType, aContext) {
this.checkTypes(aFromType, aToType);
let addon = this.getAddon(aContext);
let count = aStream.available();
let string = count
? new TextDecoder().decode(lazy.NetUtil.readInputStream(aStream, count))
: "";
return this.convertToStream(addon, string);
},
asyncConvertData(aFromType, aToType, aListener, aContext) {
this.checkTypes(aFromType, aToType);
this.addon = this.getAddon(aContext);
this.listener = aListener;
},
onStartRequest() {
this.parts = [];
this.decoder = new TextDecoder();
},
onDataAvailable(aRequest, aInputStream, aOffset, aCount) {
let bytes = lazy.NetUtil.readInputStream(aInputStream, aCount);
this.parts.push(this.decoder.decode(bytes, { stream: true }));
},
onStopRequest(aRequest, aStatusCode) {
try {
this.listener.onStartRequest(aRequest, null);
if (Components.isSuccessCode(aStatusCode)) {
this.parts.push(this.decoder.decode());
let string = this.parts.join("");
let stream = this.convertToStream(this.addon, string);
this.listener.onDataAvailable(aRequest, stream, 0, stream.available());
}
} catch (e) {
aStatusCode = e.result || Cr.NS_ERROR_FAILURE;
}
this.listener.onStopRequest(aRequest, aStatusCode);
},
};
export function HttpIndexViewer() {}
HttpIndexViewer.prototype = {
QueryInterface: ChromeUtils.generateQI(["nsIDocumentLoaderFactory"]),
createInstance(
aCommand,
aChannel,
aLoadGroup,
aContentType,
aContainer,
aExtraInfo,
aDocListenerResult
) {
// Bug 1824325: application/http-index-format is deprecated for almost all
// sites, we only allow it for urls with a inner scheme of "file" or
// "moz-gio" (specified in network.http_index_format.allowed_schemes).
// This also includes jar: and resource:// uris, as jar: uris has a inner
// scheme of "file", and resource:// uris have been turned into either a
// jar: or file:// uri by the point where we are checking them here.
let uri = aChannel.URI;
if (uri instanceof Ci.nsINestedURI) {
uri = uri.QueryInterface(Ci.nsINestedURI).innermostURI;
}
const allowedSchemes = Services.prefs.getStringPref(
"network.http_index_format.allowed_schemes",
""
);
let isFile =
allowedSchemes === "*" || allowedSchemes.split(",").some(uri.schemeIs);
let contentType = isFile ? "text/html" : "text/plain";
aChannel.contentType = contentType;
let contract = Services.catMan.getCategoryEntry(
"Gecko-Content-Viewers",
contentType
);
let factory = Cc[contract].getService(Ci.nsIDocumentLoaderFactory);
let listener = {};
let res = factory.createInstance(
"view",
aChannel,
aLoadGroup,
contentType,
aContainer,
aExtraInfo,
listener
);
if (isFile) {
aDocListenerResult.value = lazy.streamConv.asyncConvertData(
"application/http-index-format",
"text/html",
listener.value,
null
);
} else {
aDocListenerResult.value = listener.value;
aChannel.loadInfo.browsingContext.window.console.warn(
"application/http-index-format is deprecated, content will display as plain text"
);
}
return res;
},
};
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