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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/chrome_thread.h"
#include "chrome/browser/host_content_settings_map.h"
#include "googleurl/src/gurl.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) {
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;
}
const std::string& host = url.host();
ContentSetting setting = host_content_settings_map_->GetContentSetting(
host, CONTENT_SETTINGS_TYPE_COOKIES);
if (setting == CONTENT_SETTING_BLOCK)
return net::ERR_ACCESS_DENIED;
if (setting == CONTENT_SETTING_ALLOW)
return net::OK;
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(host);
if (it == host_completions_map_.end())
return net::OK;
if (it->second.size() >= kMaxCompletionsPerHost) {
LOG(ERROR) << "Would exceed kMaxCompletionsPerHost";
return net::ERR_ACCESS_DENIED;
}
it->second.push_back(Completion::ForGetCookies(callback));
return net::ERR_IO_PENDING;
}
int ChromeCookiePolicy::CanSetCookie(const GURL& url,
const GURL& first_party,
const std::string& cookie_line,
net::CompletionCallback* callback) {
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;
}
const std::string& host = url.host();
ContentSetting setting = host_content_settings_map_->GetContentSetting(
host, CONTENT_SETTINGS_TYPE_COOKIES);
if (setting == CONTENT_SETTING_BLOCK)
return net::ERR_ACCESS_DENIED;
if (setting == CONTENT_SETTING_ALLOW)
return net::OK;
DCHECK(callback);
// Else, ask the user...
Completions& completions = host_completions_map_[host];
if (completions.size() >= kMaxCompletionsPerHost) {
LOG(ERROR) << "Would exceed kMaxCompletionsPerHost";
return net::ERR_ACCESS_DENIED;
}
completions.push_back(Completion::ForSetCookie(callback));
PromptForSetCookie(host, cookie_line);
return net::ERR_IO_PENDING;
}
void ChromeCookiePolicy::PromptForSetCookie(const std::string &host,
const std::string& cookie_line) {
if (!ChromeThread::CurrentlyOn(ChromeThread::UI)) {
ChromeThread::PostTask(
ChromeThread::UI, FROM_HERE,
NewRunnableMethod(this, &ChromeCookiePolicy::PromptForSetCookie, host,
cookie_line));
return;
}
// TODO(darin): Prompt user!
#if 0
MessageBox(NULL,
UTF8ToWide(cookie_line).c_str(),
UTF8ToWide(host).c_str(),
MB_OK);
#endif
DidPromptForSetCookie(host, net::OK);
}
void ChromeCookiePolicy::DidPromptForSetCookie(const std::string &host,
int result) {
if (!ChromeThread::CurrentlyOn(ChromeThread::IO)) {
ChromeThread::PostTask(
ChromeThread::IO, FROM_HERE,
NewRunnableMethod(this, &ChromeCookiePolicy::DidPromptForSetCookie,
host, result));
return;
}
// Notify all callbacks, starting with the first until we hit another that
// is for a 'set-cookie'.
HostCompletionsMap::iterator it = host_completions_map_.find(host);
CHECK(it != host_completions_map_.end());
Completions& completions = it->second;
CHECK(!completions.empty() && completions[0].is_set_cookie_request());
// Gather the list of callbacks to notify, and remove them from the
// completions list before handing control to the callbacks (in case
// they should call back into us to modify host_completions_map_).
std::vector<net::CompletionCallback*> callbacks;
callbacks.push_back(completions[0].callback());
size_t i = 1;
for (; i < completions.size(); ++i) {
if (completions[i].is_set_cookie_request())
break;
callbacks.push_back(completions[i].callback());
}
completions.erase(completions.begin(), completions.begin() + i);
if (completions.empty())
host_completions_map_.erase(it);
for (size_t j = 0; j < callbacks.size(); ++j)
callbacks[j]->Run(result);
}
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