106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const {Cc, Ci, components} = require("chrome");
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const xpcom = require("sdk/platform/xpcom");
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const {Unknown} = require("sdk/platform/xpcom");
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const {Class} = require("sdk/core/heritage");
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const categoryManager = Cc["@mozilla.org/categorymanager;1"]
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.getService(Ci.nsICategoryManager);
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loader.lazyRequireGetter(this, "NetworkHelper",
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"devtools/shared/webconsole/network-helper");
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// Constants
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const JSON_TYPE = "application/json";
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const CONTRACT_ID = "@mozilla.org/devtools/jsonview-sniffer;1";
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const CLASS_ID = "{4148c488-dca1-49fc-a621-2a0097a62422}";
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const JSON_VIEW_MIME_TYPE = "application/vnd.mozilla.json.view";
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const JSON_VIEW_TYPE = "JSON View";
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const CONTENT_SNIFFER_CATEGORY = "net-content-sniffers";
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/**
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* This component represents a sniffer (implements nsIContentSniffer
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* interface) responsible for changing top level 'application/json'
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* document types to: 'application/vnd.mozilla.json.view'.
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*
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* This internal type is consequently rendered by JSON View component
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* that represents the JSON through a viewer interface.
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*/
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var Sniffer = Class({
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extends: Unknown,
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interfaces: [
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"nsIContentSniffer",
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],
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get wrappedJSObject() {
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return this;
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},
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getMIMETypeFromContent: function (request, data, length) {
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// JSON View is enabled only for top level loads only.
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if (!NetworkHelper.isTopLevelLoad(request)) {
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return "";
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}
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if (request instanceof Ci.nsIChannel) {
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try {
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if (request.contentDisposition ==
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Ci.nsIChannel.DISPOSITION_ATTACHMENT) {
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return "";
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}
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} catch (e) {
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// Channel doesn't support content dispositions
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}
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// Check the response content type and if it's application/json
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// change it to new internal type consumed by JSON View.
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if (request.contentType == JSON_TYPE) {
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return JSON_VIEW_MIME_TYPE;
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}
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}
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return "";
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}
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});
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var service = xpcom.Service({
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id: components.ID(CLASS_ID),
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contract: CONTRACT_ID,
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Component: Sniffer,
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register: false,
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unregister: false
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});
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function register() {
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if (!xpcom.isRegistered(service)) {
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xpcom.register(service);
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categoryManager.addCategoryEntry(CONTENT_SNIFFER_CATEGORY, JSON_VIEW_TYPE,
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CONTRACT_ID, false, false);
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return true;
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}
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return false;
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}
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function unregister() {
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if (xpcom.isRegistered(service)) {
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categoryManager.deleteCategoryEntry(CONTENT_SNIFFER_CATEGORY,
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JSON_VIEW_TYPE, false);
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xpcom.unregister(service);
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return true;
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}
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return false;
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}
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exports.JsonViewSniffer = {
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register: register,
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unregister: unregister
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};
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