forked from mirrors/gecko-dev
e26a356c6b
This is the result of: $ ./mach esmify devtools/client/ Differential Revision: https://phabricator.services.mozilla.com/D156181
64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
/* 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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import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
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const gPrefs = {};
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XPCOMUtils.defineLazyPreferenceGetter(
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gPrefs,
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"gEnabled",
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"devtools.jsonview.enabled"
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);
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const JSON_VIEW_MIME_TYPE = "application/vnd.mozilla.json.view";
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function getContentDisposition(channel) {
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try {
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return channel.contentDisposition;
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} catch (e) {
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// Channel doesn't support content dispositions
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return null;
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}
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}
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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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* This is done in the .js file rather than a .jsm to avoid creating
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* a compartment at startup when no JSON is being viewed.
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*/
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export class Sniffer {
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getMIMETypeFromContent(request, data, length) {
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if (request instanceof Ci.nsIChannel) {
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// JSON View is enabled only for top level loads only.
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if (
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gPrefs.gEnabled &&
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request.loadInfo?.isTopLevelLoad &&
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request.loadFlags & Ci.nsIChannel.LOAD_DOCUMENT_URI &&
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getContentDisposition(request) != Ci.nsIChannel.DISPOSITION_ATTACHMENT
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) {
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// Check the response content type and if it's a valid type
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// such as application/json or application/manifest+json
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// change it to new internal type consumed by JSON View.
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if (/^application\/(?:.+\+)?json$/.test(request.contentType)) {
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return JSON_VIEW_MIME_TYPE;
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}
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} else if (request.contentType === JSON_VIEW_MIME_TYPE) {
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return "application/json";
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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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Sniffer.prototype.QueryInterface = ChromeUtils.generateQI([
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"nsIContentSniffer",
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]);
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