зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
3.2 KiB
JavaScript
113 строки
3.2 KiB
JavaScript
/* 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/. */
|
|
|
|
/**
|
|
* PageThumbsProtocol.js
|
|
*
|
|
* This file implements the moz-page-thumb:// protocol and the corresponding
|
|
* channel delivering cached thumbnails.
|
|
*
|
|
* URL structure:
|
|
*
|
|
* moz-page-thumb://thumbnail?url=http%3A%2F%2Fwww.mozilla.org%2F
|
|
*
|
|
* This URL requests an image for 'http://www.mozilla.org/'.
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const Cu = Components.utils;
|
|
const Cc = Components.classes;
|
|
const Cr = Components.results;
|
|
const Ci = Components.interfaces;
|
|
|
|
Cu.import("resource://gre/modules/PageThumbs.jsm");
|
|
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
|
|
|
|
XPCOMUtils.defineLazyModuleGetter(this, "Services",
|
|
"resource://gre/modules/Services.jsm");
|
|
XPCOMUtils.defineLazyModuleGetter(this, "FileUtils",
|
|
"resource://gre/modules/FileUtils.jsm");
|
|
|
|
/**
|
|
* Implements the thumbnail protocol handler responsible for moz-page-thumb: URIs.
|
|
*/
|
|
function Protocol() {
|
|
}
|
|
|
|
Protocol.prototype = {
|
|
/**
|
|
* The scheme used by this protocol.
|
|
*/
|
|
get scheme() PageThumbs.scheme,
|
|
|
|
/**
|
|
* The default port for this protocol (we don't support ports).
|
|
*/
|
|
get defaultPort() -1,
|
|
|
|
/**
|
|
* The flags specific to this protocol implementation.
|
|
*/
|
|
get protocolFlags() {
|
|
return Ci.nsIProtocolHandler.URI_DANGEROUS_TO_LOAD |
|
|
Ci.nsIProtocolHandler.URI_NORELATIVE |
|
|
Ci.nsIProtocolHandler.URI_NOAUTH;
|
|
},
|
|
|
|
/**
|
|
* Creates a new URI object that is suitable for loading by this protocol.
|
|
* @param aSpec The URI string in UTF8 encoding.
|
|
* @param aOriginCharset The charset of the document from which the URI originated.
|
|
* @return The newly created URI.
|
|
*/
|
|
newURI: function Proto_newURI(aSpec, aOriginCharset) {
|
|
let uri = Cc["@mozilla.org/network/simple-uri;1"].createInstance(Ci.nsIURI);
|
|
uri.spec = aSpec;
|
|
return uri;
|
|
},
|
|
|
|
/**
|
|
* Constructs a new channel from the given URI for this protocol handler.
|
|
* @param aURI The URI for which to construct a channel.
|
|
* @return The newly created channel.
|
|
*/
|
|
newChannel: function Proto_newChannel(aURI) {
|
|
let {url} = parseURI(aURI);
|
|
let file = PageThumbsStorage.getFilePathForURL(url);
|
|
let fileuri = Services.io.newFileURI(new FileUtils.File(file));
|
|
return Services.io.newChannelFromURI(fileuri);
|
|
},
|
|
|
|
/**
|
|
* Decides whether to allow a blacklisted port.
|
|
* @return Always false, we'll never allow ports.
|
|
*/
|
|
allowPort: function () false,
|
|
|
|
classID: Components.ID("{5a4ae9b5-f475-48ae-9dce-0b4c1d347884}"),
|
|
QueryInterface: XPCOMUtils.generateQI([Ci.nsIProtocolHandler])
|
|
};
|
|
|
|
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([Protocol]);
|
|
|
|
/**
|
|
* Parses a given URI and extracts all parameters relevant to this protocol.
|
|
* @param aURI The URI to parse.
|
|
* @return The parsed parameters.
|
|
*/
|
|
function parseURI(aURI) {
|
|
let {scheme, staticHost} = PageThumbs;
|
|
let re = new RegExp("^" + scheme + "://" + staticHost + ".*?\\?");
|
|
let query = aURI.spec.replace(re, "");
|
|
let params = {};
|
|
|
|
query.split("&").forEach(function (aParam) {
|
|
let [key, value] = aParam.split("=").map(decodeURIComponent);
|
|
params[key.toLowerCase()] = value;
|
|
});
|
|
|
|
return params;
|
|
}
|