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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/. */
"use strict";
ChromeUtils.defineModuleGetter(this, "OS", "resource://gre/modules/osfile.jsm");
ChromeUtils.defineModuleGetter(
this,
"DownloadPaths",
"resource://gre/modules/DownloadPaths.jsm"
);
var { ignoreEvent } = ExtensionCommon;
const REQUEST_DOWNLOAD_MESSAGE = "GeckoView:WebExtension:Download";
const FORBIDDEN_HEADERS = [
"ACCEPT-CHARSET",
"ACCEPT-ENCODING",
"ACCESS-CONTROL-REQUEST-HEADERS",
"ACCESS-CONTROL-REQUEST-METHOD",
"CONNECTION",
"CONTENT-LENGTH",
"COOKIE",
"COOKIE2",
"DATE",
"DNT",
"EXPECT",
"HOST",
"KEEP-ALIVE",
"ORIGIN",
"TE",
"TRAILER",
"TRANSFER-ENCODING",
"UPGRADE",
"VIA",
];
const FORBIDDEN_PREFIXES = /^PROXY-|^SEC-/i;
const State = {
IN_PROGRESS: "in_progress",
INTERRUPTED: "interrupted",
COMPLETE: "complete",
};
// TODO Bug 1247794: make id and extension info persistent
class DownloadItem {
constructor(downloadInfo, options, extension) {
this.id = downloadInfo.id;
this.url = options.url;
this.referrer = downloadInfo.referrer || "";
this.filename = options.filename || "";
this.incognito = options.incognito;
this.danger = downloadInfo.danger || "safe"; // todo; not implemented in toolkit either
this.mime = downloadInfo.mime || "";
this.startTime = Date.now().toString();
this.state = State.IN_PROGRESS;
this.paused = false;
this.canResume = false;
this.bytesReceived = 0;
this.totalBytes = -1;
this.fileSize = -1;
this.exists = downloadInfo.exists || false;
this.byExtensionId = extension?.id;
this.byExtensionName = extension?.name;
}
}
this.downloads = class extends ExtensionAPI {
getAPI(context) {
const { extension } = context;
return {
downloads: {
download(options) {
// the validation checks should be kept in sync with the toolkit implementation
const { filename } = options;
if (filename != null) {
if (!filename.length) {
return Promise.reject({ message: "filename must not be empty" });
}
const path = OS.Path.split(filename);
if (path.absolute) {
return Promise.reject({
message: "filename must not be an absolute path",
});
}
if (path.components.some(component => component == "..")) {
return Promise.reject({
message: "filename must not contain back-references (..)",
});
}
if (
path.components.some(component => {
const sanitized = DownloadPaths.sanitize(component, {
compressWhitespaces: false,
});
return component != sanitized;
})
) {
return Promise.reject({
message: "filename must not contain illegal characters",
});
}
}
if (options.incognito && !context.privateBrowsingAllowed) {
return Promise.reject({
message: "Private browsing access not allowed",
});
}
if (options.headers) {
for (const { name } of options.headers) {
if (
FORBIDDEN_HEADERS.includes(name.toUpperCase()) ||
name.match(FORBIDDEN_PREFIXES)
) {
return Promise.reject({
message: "Forbidden request header name",
});
}
}
}
return EventDispatcher.instance
.sendRequestForResult({
type: REQUEST_DOWNLOAD_MESSAGE,
options,
extensionId: extension.id,
})
.then(value => {
const downloadItem = new DownloadItem(
{ id: value },
options,
extension
);
return downloadItem.id;
});
},
removeFile(downloadId) {
throw new ExtensionError("Not implemented");
},
search(query) {
throw new ExtensionError("Not implemented");
},
pause(downloadId) {
throw new ExtensionError("Not implemented");
},
resume(downloadId) {
throw new ExtensionError("Not implemented");
},
cancel(downloadId) {
throw new ExtensionError("Not implemented");
},
showDefaultFolder() {
throw new ExtensionError("Not implemented");
},
erase(query) {
throw new ExtensionError("Not implemented");
},
open(downloadId) {
throw new ExtensionError("Not implemented");
},
show(downloadId) {
throw new ExtensionError("Not implemented");
},
getFileIcon(downloadId, options) {
throw new ExtensionError("Not implemented");
},
onChanged: ignoreEvent(context, "downloads.onChanged"),
onCreated: ignoreEvent(context, "downloads.onCreated"),
onErased: ignoreEvent(context, "downloads.onErased"),
onDeterminingFilename: ignoreEvent(
context,
"downloads.onDeterminingFilename"
),
},
};
}
};
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