1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* vim: set ts=2 et sw=2 tw=80: */
3 : /* ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is Indexed Database.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * The Mozilla Foundation.
20 : * Portions created by the Initial Developer are Copyright (C) 2010
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : * Ben Turner <bent.mozilla@gmail.com>
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either the GNU General Public License Version 2 or later (the "GPL"), or
28 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include "CheckQuotaHelper.h"
41 :
42 : #include "nsIDOMWindow.h"
43 : #include "nsIObserverService.h"
44 : #include "nsIPermissionManager.h"
45 : #include "nsIPrincipal.h"
46 : #include "nsIScriptObjectPrincipal.h"
47 : #include "nsIURI.h"
48 : #include "nsXULAppAPI.h"
49 :
50 : #include "nsContentUtils.h"
51 : #include "nsNetUtil.h"
52 : #include "nsThreadUtils.h"
53 : #include "mozilla/Services.h"
54 :
55 : #include "IndexedDatabaseManager.h"
56 :
57 : #define PERMISSION_INDEXEDDB_UNLIMITED "indexedDB-unlimited"
58 :
59 : #define TOPIC_QUOTA_PROMPT "indexedDB-quota-prompt"
60 : #define TOPIC_QUOTA_RESPONSE "indexedDB-quota-response"
61 : #define TOPIC_QUOTA_CANCEL "indexedDB-quota-cancel"
62 :
63 : USING_INDEXEDDB_NAMESPACE
64 : using namespace mozilla::services;
65 : using mozilla::MutexAutoLock;
66 :
67 : namespace {
68 :
69 : inline
70 : PRUint32
71 0 : GetQuotaPermissions(const nsACString& aASCIIOrigin,
72 : nsIDOMWindow* aWindow)
73 : {
74 0 : NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
75 :
76 0 : nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(aWindow));
77 0 : NS_ENSURE_TRUE(sop, nsIPermissionManager::DENY_ACTION);
78 :
79 0 : if (nsContentUtils::IsSystemPrincipal(sop->GetPrincipal())) {
80 0 : return nsIPermissionManager::ALLOW_ACTION;
81 : }
82 :
83 0 : nsCOMPtr<nsIURI> uri;
84 0 : nsresult rv = NS_NewURI(getter_AddRefs(uri), aASCIIOrigin);
85 0 : NS_ENSURE_SUCCESS(rv, nsIPermissionManager::DENY_ACTION);
86 :
87 : nsCOMPtr<nsIPermissionManager> permissionManager =
88 0 : do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
89 0 : NS_ENSURE_TRUE(permissionManager, nsIPermissionManager::DENY_ACTION);
90 :
91 : PRUint32 permission;
92 0 : rv = permissionManager->TestPermission(uri, PERMISSION_INDEXEDDB_UNLIMITED,
93 0 : &permission);
94 0 : NS_ENSURE_SUCCESS(rv, nsIPermissionManager::DENY_ACTION);
95 :
96 0 : return permission;
97 : }
98 :
99 : } // anonymous namespace
100 :
101 0 : CheckQuotaHelper::CheckQuotaHelper(nsPIDOMWindow* aWindow,
102 : mozilla::Mutex& aMutex)
103 : : mWindow(aWindow),
104 : mMutex(aMutex),
105 : mCondVar(mMutex, "CheckQuotaHelper::mCondVar"),
106 : mPromptResult(0),
107 : mWaiting(true),
108 0 : mHasPrompted(false)
109 : {
110 0 : NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
111 0 : mMutex.AssertCurrentThreadOwns();
112 0 : }
113 :
114 : bool
115 0 : CheckQuotaHelper::PromptAndReturnQuotaIsDisabled()
116 : {
117 0 : NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
118 0 : mMutex.AssertCurrentThreadOwns();
119 :
120 0 : while (mWaiting) {
121 0 : mCondVar.Wait();
122 : }
123 :
124 0 : NS_ASSERTION(!mWindow, "This should always be null here!");
125 :
126 0 : NS_ASSERTION(mPromptResult == nsIPermissionManager::ALLOW_ACTION ||
127 : mPromptResult == nsIPermissionManager::DENY_ACTION ||
128 : mPromptResult == nsIPermissionManager::UNKNOWN_ACTION,
129 : "Unknown permission!");
130 :
131 0 : return mPromptResult == nsIPermissionManager::ALLOW_ACTION;
132 : }
133 :
134 : void
135 0 : CheckQuotaHelper::Cancel()
136 : {
137 0 : NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
138 0 : mMutex.AssertCurrentThreadOwns();
139 :
140 0 : if (mWaiting && !mHasPrompted) {
141 0 : MutexAutoUnlock unlock(mMutex);
142 :
143 : // First close any prompts that are open for this window.
144 0 : nsCOMPtr<nsIObserverService> obs = GetObserverService();
145 0 : NS_WARN_IF_FALSE(obs, "Failed to get observer service!");
146 0 : if (obs && NS_FAILED(obs->NotifyObservers(static_cast<nsIRunnable*>(this),
147 : TOPIC_QUOTA_CANCEL, nsnull))) {
148 0 : NS_WARNING("Failed to notify observers!");
149 : }
150 :
151 : // If that didn't trigger an Observe callback (maybe the window had already
152 : // died?) then go ahead and do it manually.
153 0 : if (!mHasPrompted) {
154 0 : nsAutoString response;
155 0 : response.AppendInt(nsIPermissionManager::UNKNOWN_ACTION);
156 :
157 0 : if (NS_SUCCEEDED(Observe(nsnull, TOPIC_QUOTA_RESPONSE, response.get()))) {
158 0 : NS_ASSERTION(mHasPrompted, "Should have set this in Observe!");
159 : }
160 : else {
161 0 : NS_WARNING("Failed to notify!");
162 : }
163 : }
164 : }
165 0 : }
166 :
167 0 : NS_IMPL_THREADSAFE_ISUPPORTS3(CheckQuotaHelper, nsIRunnable,
168 : nsIInterfaceRequestor,
169 : nsIObserver)
170 :
171 : NS_IMETHODIMP
172 0 : CheckQuotaHelper::Run()
173 : {
174 0 : NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
175 :
176 0 : nsresult rv = NS_OK;
177 :
178 0 : if (mASCIIOrigin.IsEmpty()) {
179 : rv = IndexedDatabaseManager::GetASCIIOriginFromWindow(mWindow,
180 0 : mASCIIOrigin);
181 : }
182 :
183 0 : if (NS_SUCCEEDED(rv)) {
184 0 : if (!mHasPrompted) {
185 0 : mPromptResult = GetQuotaPermissions(mASCIIOrigin, mWindow);
186 : }
187 :
188 0 : if (mHasPrompted) {
189 : // Add permissions to the database, but only if we are in the parent
190 : // process (if we are in the child process, we have already
191 : // set the permission when the prompt was shown in the parent, as
192 : // we cannot set the permission from the child).
193 0 : if (mPromptResult != nsIPermissionManager::UNKNOWN_ACTION &&
194 0 : XRE_GetProcessType() == GeckoProcessType_Default) {
195 0 : nsCOMPtr<nsIURI> uri;
196 0 : rv = NS_NewURI(getter_AddRefs(uri), mASCIIOrigin);
197 0 : NS_ENSURE_SUCCESS(rv, rv);
198 :
199 : nsCOMPtr<nsIPermissionManager> permissionManager =
200 0 : do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
201 0 : NS_ENSURE_STATE(permissionManager);
202 :
203 0 : rv = permissionManager->Add(uri, PERMISSION_INDEXEDDB_UNLIMITED,
204 : mPromptResult,
205 0 : nsIPermissionManager::EXPIRE_NEVER, 0);
206 0 : NS_ENSURE_SUCCESS(rv, rv);
207 : }
208 : }
209 0 : else if (mPromptResult == nsIPermissionManager::UNKNOWN_ACTION) {
210 0 : PRUint32 quota = IndexedDatabaseManager::GetIndexedDBQuotaMB();
211 :
212 0 : nsString quotaString;
213 0 : quotaString.AppendInt(quota);
214 :
215 0 : nsCOMPtr<nsIObserverService> obs = GetObserverService();
216 0 : NS_ENSURE_STATE(obs);
217 :
218 : // We have to watch to make sure that the window doesn't go away without
219 : // responding to us. Otherwise our database threads will hang.
220 0 : rv = obs->AddObserver(this, DOM_WINDOW_DESTROYED_TOPIC, false);
221 0 : NS_ENSURE_SUCCESS(rv, rv);
222 :
223 0 : rv = obs->NotifyObservers(static_cast<nsIRunnable*>(this),
224 0 : TOPIC_QUOTA_PROMPT, quotaString.get());
225 0 : NS_ENSURE_SUCCESS(rv, rv);
226 :
227 0 : return NS_OK;
228 : }
229 : }
230 :
231 0 : MutexAutoLock lock(mMutex);
232 :
233 0 : NS_ASSERTION(mWaiting, "Huh?!");
234 :
235 : // This should never be used again.
236 0 : mWindow = nsnull;
237 :
238 0 : mWaiting = false;
239 0 : mCondVar.NotifyAll();
240 :
241 0 : return NS_OK;
242 : }
243 :
244 : NS_IMETHODIMP
245 0 : CheckQuotaHelper::GetInterface(const nsIID& aIID,
246 : void** aResult)
247 : {
248 0 : NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
249 :
250 0 : if (aIID.Equals(NS_GET_IID(nsIObserver))) {
251 0 : return QueryInterface(aIID, aResult);
252 : }
253 :
254 0 : if (aIID.Equals(NS_GET_IID(nsIDOMWindow))) {
255 0 : return mWindow->QueryInterface(aIID, aResult);
256 : }
257 :
258 0 : *aResult = nsnull;
259 0 : return NS_ERROR_NOT_AVAILABLE;
260 : }
261 :
262 : NS_IMETHODIMP
263 0 : CheckQuotaHelper::Observe(nsISupports* aSubject,
264 : const char* aTopic,
265 : const PRUnichar* aData)
266 : {
267 0 : NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
268 :
269 : nsresult rv;
270 :
271 0 : if (!strcmp(aTopic, TOPIC_QUOTA_RESPONSE)) {
272 0 : if (!mHasPrompted) {
273 0 : mHasPrompted = true;
274 :
275 0 : mPromptResult = nsDependentString(aData).ToInteger(&rv);
276 0 : NS_ENSURE_SUCCESS(rv, rv);
277 :
278 0 : rv = NS_DispatchToCurrentThread(this);
279 0 : NS_ENSURE_SUCCESS(rv, rv);
280 :
281 : // We no longer care about the window here.
282 0 : nsCOMPtr<nsIObserverService> obs = GetObserverService();
283 0 : NS_ENSURE_STATE(obs);
284 :
285 0 : rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
286 0 : NS_ENSURE_SUCCESS(rv, rv);
287 : }
288 0 : return NS_OK;
289 : }
290 :
291 0 : if (!strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC)) {
292 0 : NS_ASSERTION(!mHasPrompted, "Should have removed observer before now!");
293 0 : NS_ASSERTION(mWindow, "This should never be null!");
294 :
295 0 : nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(aSubject));
296 0 : NS_ENSURE_STATE(window);
297 :
298 0 : if (mWindow->GetSerial() == window->GetSerial()) {
299 : // This is our window, dying, without responding to our prompt! Fake one.
300 0 : mHasPrompted = true;
301 0 : mPromptResult = nsIPermissionManager::UNKNOWN_ACTION;
302 :
303 0 : rv = NS_DispatchToCurrentThread(this);
304 0 : NS_ENSURE_SUCCESS(rv, rv);
305 :
306 : // We no longer care about the window here.
307 0 : nsCOMPtr<nsIObserverService> obs = GetObserverService();
308 0 : NS_ENSURE_STATE(obs);
309 :
310 0 : rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
311 0 : NS_ENSURE_SUCCESS(rv, rv);
312 : }
313 0 : return NS_OK;
314 : }
315 :
316 0 : NS_NOTREACHED("Unexpected topic!");
317 0 : return NS_ERROR_UNEXPECTED;
318 : }
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