зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
2.4 KiB
C++
116 строки
2.4 KiB
C++
/* 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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#include "CacheLog.h"
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#include "CacheFileUtils.h"
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#include "LoadContextInfo.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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namespace mozilla {
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namespace net {
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namespace CacheFileUtils {
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nsresult ParseKey(const nsACString &aKey,
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nsILoadContextInfo **aInfo,
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nsACString *aURL)
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{
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bool isPrivate;
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bool isAnonymous;
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bool isInBrowser;
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uint32_t appId;
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if (aKey.Length() < 4) {
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return NS_ERROR_FAILURE;
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}
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if (aKey[0] == '-') {
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isPrivate = false;
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}
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else if (aKey[0] == 'P') {
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isPrivate = true;
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}
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else {
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return NS_ERROR_FAILURE;
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}
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if (aKey[1] == '-') {
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isAnonymous = false;
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}
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else if (aKey[1] == 'A') {
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isAnonymous = true;
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}
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else {
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return NS_ERROR_FAILURE;
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}
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if (aKey[2] != ':') {
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return NS_ERROR_FAILURE;
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}
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int32_t appIdEndIdx = aKey.FindChar(':', 3);
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if (appIdEndIdx == kNotFound) {
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return NS_ERROR_FAILURE;
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}
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if (aKey[appIdEndIdx - 1] == 'B') {
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isInBrowser = true;
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appIdEndIdx--;
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} else {
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isInBrowser = false;
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}
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if (appIdEndIdx < 3) {
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return NS_ERROR_FAILURE;
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}
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if (appIdEndIdx == 3) {
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appId = nsILoadContextInfo::NO_APP_ID;
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}
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else {
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nsAutoCString appIdStr(Substring(aKey, 3, appIdEndIdx - 3));
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nsresult rv;
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int64_t appId64 = appIdStr.ToInteger64(&rv);
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if (NS_FAILED(rv) || appId64 > PR_UINT32_MAX)
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return NS_ERROR_FAILURE;
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appId = appId64;
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}
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if (aInfo) {
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nsCOMPtr<nsILoadContextInfo> info;
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info = GetLoadContextInfo(isPrivate, appId, isInBrowser, isAnonymous);
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info.forget(aInfo);
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}
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if (aURL) {
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*aURL = Substring(aKey, appIdEndIdx + 1);
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}
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return NS_OK;
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}
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void CreateKeyPrefix(nsILoadContextInfo* aInfo, nsACString &_retval)
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{
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/**
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* This key is used to salt file hashes. When form of the key is changed
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* cache entries will fail to find on disk.
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*/
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_retval.Assign(aInfo->IsPrivate() ? 'P' : '-');
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_retval.Append(aInfo->IsAnonymous() ? 'A' : '-');
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_retval.Append(':');
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if (aInfo->AppId() != nsILoadContextInfo::NO_APP_ID) {
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_retval.AppendInt(aInfo->AppId());
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}
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if (aInfo->IsInBrowserElement()) {
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_retval.Append('B');
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}
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}
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} // CacheFileUtils
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} // net
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} // mozilla
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