mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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240 lines
9.3 KiB
C++
240 lines
9.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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// vim: ft=cpp tw=78 sw=4 et ts=8
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is
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* Zero-Knowledge Systems, Inc.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Implementation of the "@mozilla.org/layout/content-policy;1" contract.
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*/
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#include "prlog.h"
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#include "nsISupports.h"
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#include "nsXPCOM.h"
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#include "nsContentPolicyUtils.h"
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#include "nsContentPolicy.h"
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#include "nsIURI.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMWindow.h"
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#include "nsIContent.h"
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#include "nsCOMArray.h"
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NS_IMPL_ISUPPORTS1(nsContentPolicy, nsIContentPolicy)
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#ifdef PR_LOGGING
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static PRLogModuleInfo* gConPolLog;
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#endif
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nsresult
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NS_NewContentPolicy(nsIContentPolicy **aResult)
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{
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*aResult = new nsContentPolicy;
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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nsContentPolicy::nsContentPolicy()
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: mPolicies(NS_CONTENTPOLICY_CATEGORY)
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{
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#ifdef PR_LOGGING
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if (! gConPolLog) {
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gConPolLog = PR_NewLogModule("nsContentPolicy");
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}
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#endif
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}
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nsContentPolicy::~nsContentPolicy()
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{
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}
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#ifdef DEBUG
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#define WARN_IF_URI_UNINITIALIZED(uri,name) \
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PR_BEGIN_MACRO \
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if ((uri)) { \
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nsCAutoString spec; \
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(uri)->GetAsciiSpec(spec); \
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if (spec.IsEmpty()) { \
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NS_WARNING(name " is uninitialized, fix caller"); \
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} \
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} \
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PR_END_MACRO
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#else // ! defined(DEBUG)
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#define WARN_IF_URI_UNINITIALIZED(uri,name)
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#endif // defined(DEBUG)
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inline nsresult
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nsContentPolicy::CheckPolicy(CPMethod policyMethod,
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PRUint32 contentType,
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nsIURI *contentLocation,
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nsIURI *requestingLocation,
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nsISupports *requestingContext,
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const nsACString &mimeType,
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nsISupports *extra,
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PRInt16 *decision)
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{
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//sanity-check passed-through parameters
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NS_PRECONDITION(decision, "Null out pointer");
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WARN_IF_URI_UNINITIALIZED(contentLocation, "Request URI");
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WARN_IF_URI_UNINITIALIZED(requestingLocation, "Requesting URI");
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#ifdef DEBUG
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{
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nsCOMPtr<nsIDOMNode> node(do_QueryInterface(requestingContext));
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nsCOMPtr<nsIDOMWindow> window(do_QueryInterface(requestingContext));
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NS_ASSERTION(!requestingContext || node || window,
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"Context should be a DOM node or a DOM window!");
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}
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#endif
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/*
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* There might not be a requestinglocation. This can happen for
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* iframes with an image as src. Get the uri from the dom node.
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* See bug 254510
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*/
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if (!requestingLocation) {
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nsCOMPtr<nsIDocument> doc;
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nsCOMPtr<nsIContent> node = do_QueryInterface(requestingContext);
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if (node) {
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doc = node->GetOwnerDoc();
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}
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if (!doc) {
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doc = do_QueryInterface(requestingContext);
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}
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if (doc) {
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requestingLocation = doc->GetDocumentURI();
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}
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}
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/*
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* Enumerate mPolicies and ask each of them, taking the logical AND of
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* their permissions.
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*/
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nsresult rv;
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const nsCOMArray<nsIContentPolicy>& entries = mPolicies.GetEntries();
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PRInt32 count = entries.Count();
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for (PRInt32 i = 0; i < count; i++) {
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/* check the appropriate policy */
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rv = (entries[i]->*policyMethod)(contentType, contentLocation,
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requestingLocation, requestingContext,
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mimeType, extra, decision);
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if (NS_SUCCEEDED(rv) && NS_CP_REJECTED(*decision)) {
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/* policy says no, no point continuing to check */
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return NS_OK;
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}
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}
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// everyone returned failure, or no policies: sanitize result
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*decision = nsIContentPolicy::ACCEPT;
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return NS_OK;
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}
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#ifdef PR_LOGGING
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//uses the parameters from ShouldXYZ to produce and log a message
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//logType must be a literal string constant
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#define LOG_CHECK(logType) \
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PR_BEGIN_MACRO \
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/* skip all this nonsense if the call failed */ \
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if (NS_SUCCEEDED(rv)) { \
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const char *resultName; \
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if (decision) { \
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resultName = NS_CP_ResponseName(*decision); \
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} else { \
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resultName = "(null ptr)"; \
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} \
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nsCAutoString spec("None"); \
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if (contentLocation) { \
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contentLocation->GetSpec(spec); \
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} \
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nsCAutoString refSpec("None"); \
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if (requestingLocation) { \
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requestingLocation->GetSpec(refSpec); \
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} \
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PR_LOG(gConPolLog, PR_LOG_DEBUG, \
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("Content Policy: " logType ": <%s> <Ref:%s> result=%s", \
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spec.get(), refSpec.get(), resultName) \
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); \
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} \
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PR_END_MACRO
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#else //!defined(PR_LOGGING)
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#define LOG_CHECK(logType)
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#endif //!defined(PR_LOGGING)
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NS_IMETHODIMP
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nsContentPolicy::ShouldLoad(PRUint32 contentType,
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nsIURI *contentLocation,
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nsIURI *requestingLocation,
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nsISupports *requestingContext,
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const nsACString &mimeType,
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nsISupports *extra,
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PRInt16 *decision)
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{
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// ShouldProcess does not need a content location, but we do
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NS_PRECONDITION(contentLocation, "Must provide request location");
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nsresult rv = CheckPolicy(&nsIContentPolicy::ShouldLoad, contentType,
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contentLocation, requestingLocation,
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requestingContext, mimeType, extra, decision);
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LOG_CHECK("ShouldLoad");
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return rv;
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}
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NS_IMETHODIMP
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nsContentPolicy::ShouldProcess(PRUint32 contentType,
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nsIURI *contentLocation,
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nsIURI *requestingLocation,
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nsISupports *requestingContext,
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const nsACString &mimeType,
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nsISupports *extra,
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PRInt16 *decision)
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{
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nsresult rv = CheckPolicy(&nsIContentPolicy::ShouldProcess, contentType,
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contentLocation, requestingLocation,
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requestingContext, mimeType, extra, decision);
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LOG_CHECK("ShouldProcess");
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return rv;
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}
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