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content/base/src/nsNoDataProtocolContentPolicy.cpp@6474c204b198 (annotated)

content/base/src/nsNoDataProtocolContentPolicy.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	/*
michael@0	7	* Content policy implementation that prevents all loads of images,
michael@0	8	* subframes, etc from protocols that don't return data but rather open
michael@0	9	* applications (such as mailto).
michael@0	10	*/
michael@0	11
michael@0	12	#include "nsNoDataProtocolContentPolicy.h"
michael@0	13	#include "nsIDOMWindow.h"
michael@0	14	#include "nsString.h"
michael@0	15	#include "nsIProtocolHandler.h"
michael@0	16	#include "nsIIOService.h"
michael@0	17	#include "nsIExternalProtocolHandler.h"
michael@0	18	#include "nsNetUtil.h"
michael@0	19
michael@0	20	NS_IMPL_ISUPPORTS(nsNoDataProtocolContentPolicy, nsIContentPolicy)
michael@0	21
michael@0	22	NS_IMETHODIMP
michael@0	23	nsNoDataProtocolContentPolicy::ShouldLoad(uint32_t aContentType,
michael@0	24	nsIURI *aContentLocation,
michael@0	25	nsIURI *aRequestingLocation,
michael@0	26	nsISupports *aRequestingContext,
michael@0	27	const nsACString &aMimeGuess,
michael@0	28	nsISupports *aExtra,
michael@0	29	nsIPrincipal *aRequestPrincipal,
michael@0	30	int16_t *aDecision)
michael@0	31	{
michael@0	32	*aDecision = nsIContentPolicy::ACCEPT;
michael@0	33
michael@0	34	// Don't block for TYPE_OBJECT since such URIs are sometimes loaded by the
michael@0	35	// plugin, so they don't necessarily open external apps
michael@0	36	// TYPE_WEBSOCKET loads can only go to ws:// or wss://, so we don't need to
michael@0	37	// concern ourselves with them.
michael@0	38	if (aContentType != TYPE_DOCUMENT &&
michael@0	39	aContentType != TYPE_SUBDOCUMENT &&
michael@0	40	aContentType != TYPE_OBJECT &&
michael@0	41	aContentType != TYPE_WEBSOCKET) {
michael@0	42
michael@0	43	// The following are just quick-escapes for the most common cases
michael@0	44	// where we would allow the content to be loaded anyway.
michael@0	45	nsAutoCString scheme;
michael@0	46	aContentLocation->GetScheme(scheme);
michael@0	47	if (scheme.EqualsLiteral("http") ||
michael@0	48	scheme.EqualsLiteral("https") ||
michael@0	49	scheme.EqualsLiteral("ftp") ||
michael@0	50	scheme.EqualsLiteral("file") ||
michael@0	51	scheme.EqualsLiteral("chrome")) {
michael@0	52	return NS_OK;
michael@0	53	}
michael@0	54
michael@0	55	bool shouldBlock;
michael@0	56	nsresult rv = NS_URIChainHasFlags(aContentLocation,
michael@0	57	nsIProtocolHandler::URI_DOES_NOT_RETURN_DATA,
michael@0	58	&shouldBlock);
michael@0	59	if (NS_SUCCEEDED(rv) && shouldBlock) {
michael@0	60	*aDecision = nsIContentPolicy::REJECT_REQUEST;
michael@0	61	}
michael@0	62	}
michael@0	63
michael@0	64	return NS_OK;
michael@0	65	}
michael@0	66
michael@0	67	NS_IMETHODIMP
michael@0	68	nsNoDataProtocolContentPolicy::ShouldProcess(uint32_t aContentType,
michael@0	69	nsIURI *aContentLocation,
michael@0	70	nsIURI *aRequestingLocation,
michael@0	71	nsISupports *aRequestingContext,
michael@0	72	const nsACString &aMimeGuess,
michael@0	73	nsISupports *aExtra,
michael@0	74	nsIPrincipal *aRequestPrincipal,
michael@0	75	int16_t *aDecision)
michael@0	76	{
michael@0	77	return ShouldLoad(aContentType, aContentLocation, aRequestingLocation,
michael@0	78	aRequestingContext, aMimeGuess, aExtra, aRequestPrincipal,
michael@0	79	aDecision);
michael@0	80	}