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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/net/chrome_cookie_policy.h"
#include "base/string_util.h"
#include "chrome/browser/browser_list.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/host_content_settings_map.h"
#include "net/base/net_errors.h"
#include "net/base/static_cookie_policy.h"
// If we queue up more than this number of completions, then switch from ASK to
// BLOCK. More than this number of requests at once seems like it could be a
// sign of trouble anyways.
static const size_t kMaxCompletionsPerHost = 10000;
// ----------------------------------------------------------------------------
ChromeCookiePolicy::ChromeCookiePolicy(HostContentSettingsMap* map)
: host_content_settings_map_(map) {
}
ChromeCookiePolicy::~ChromeCookiePolicy() {
DCHECK(host_completions_map_.empty());
}
int ChromeCookiePolicy::CanGetCookies(const GURL& url,
const GURL& first_party,
net::CompletionCallback* callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (host_content_settings_map_->BlockThirdPartyCookies()) {
net::StaticCookiePolicy policy(
net::StaticCookiePolicy::BLOCK_THIRD_PARTY_COOKIES);
int rv = policy.CanGetCookies(url, first_party, NULL);
if (rv != net::OK)
return rv;
}
int policy = CheckPolicy(url);
if (policy == net::OK_FOR_SESSION_ONLY)
policy = net::OK;
if (policy != net::ERR_IO_PENDING)
return policy;
DCHECK(callback);
// If we are currently prompting the user for a 'set-cookie' matching this
// host, then we need to defer reading cookies.
HostCompletionsMap::iterator it = host_completions_map_.find(url.host());
if (it == host_completions_map_.end()) {
policy = net::OK;
} else if (it->second.size() >= kMaxCompletionsPerHost) {
LOG(ERROR) << "Would exceed kMaxCompletionsPerHost";
policy = net::ERR_ACCESS_DENIED;
} else {
it->second.push_back(Completion::ForGetCookies(callback));
policy = net::ERR_IO_PENDING;
}
return policy;
}
int ChromeCookiePolicy::CanSetCookie(const GURL& url,
const GURL& first_party,
const std::string& cookie_line,
net::CompletionCallback* callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (host_content_settings_map_->BlockThirdPartyCookies()) {
net::StaticCookiePolicy policy(
net::StaticCookiePolicy::BLOCK_THIRD_PARTY_COOKIES);
int rv = policy.CanSetCookie(url, first_party, cookie_line, NULL);
if (rv != net::OK)
return rv;
}
int policy = CheckPolicy(url);
if (policy != net::ERR_IO_PENDING)
return policy;
DCHECK(callback);
Completions& completions = host_completions_map_[url.host()];
if (completions.size() >= kMaxCompletionsPerHost) {
LOG(ERROR) << "Would exceed kMaxCompletionsPerHost";
policy = net::ERR_ACCESS_DENIED;
} else {
completions.push_back(Completion::ForSetCookie(callback));
policy = net::ERR_IO_PENDING;
}
return policy;
}
int ChromeCookiePolicy::CheckPolicy(const GURL& url) const {
ContentSetting setting = host_content_settings_map_->GetContentSetting(
url, CONTENT_SETTINGS_TYPE_COOKIES, "");
if (setting == CONTENT_SETTING_BLOCK)
return net::ERR_ACCESS_DENIED;
if (setting == CONTENT_SETTING_ALLOW)
return net::OK;
if (setting == CONTENT_SETTING_SESSION_ONLY)
return net::OK_FOR_SESSION_ONLY;
return net::ERR_IO_PENDING; // Need to prompt.
}
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