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// Copyright (c) 2012 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/chrome_benchmarking_message_filter.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/net/chrome_url_request_context.h"
#include "chrome/browser/net/predictor.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/benchmarking_messages.h"
#include "chrome/common/chrome_switches.h"
#include "net/base/host_cache.h"
#include "net/base/host_resolver.h"
#include "net/base/net_errors.h"
#include "net/disk_cache/disk_cache.h"
#include "net/http/http_cache.h"
#include "net/http/http_network_layer.h"
#include "net/http/http_stream_factory.h"
namespace {
void ClearCacheCallback(ChromeBenchmarkingMessageFilter* filter,
IPC::Message* reply_msg,
int result) {
ChromeViewHostMsg_ClearCache::WriteReplyParams(reply_msg, result);
filter->Send(reply_msg);
}
// Class to assist with clearing out the cache when we want to preserve
// the sslhostinfo entries. It's not very efficient, but its just for debug.
class DoomEntriesHelper {
public:
explicit DoomEntriesHelper(disk_cache::Backend* backend)
: backend_(backend),
entry_(NULL),
iter_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(callback_(
base::Bind(&DoomEntriesHelper::CacheCallback,
base::Unretained(this)))) {
}
void ClearCache(const net::CompletionCallback& callback) {
clear_cache_callback_ = callback;
return CacheCallback(net::OK); // Start clearing the cache.
}
const net::CompletionCallback& callback() { return callback_; }
private:
void CacheCallback(int result) {
do {
if (result != net::OK) {
clear_cache_callback_.Run(result);
delete this;
return;
}
if (entry_) {
// Doom all entries except those with snapstart information.
std::string key = entry_->GetKey();
if (key.find("sslhostinfo:") != 0) {
entry_->Doom();
backend_->EndEnumeration(&iter_);
iter_ = NULL; // We invalidated our iterator - start from the top!
}
entry_->Close();
entry_ = NULL;
}
result = backend_->OpenNextEntry(&iter_, &entry_, callback_);
} while (result != net::ERR_IO_PENDING);
}
disk_cache::Backend* backend_;
disk_cache::Entry* entry_;
void* iter_;
net::CompletionCallback callback_;
net::CompletionCallback clear_cache_callback_;
};
} // namespace
ChromeBenchmarkingMessageFilter::ChromeBenchmarkingMessageFilter(
int render_process_id,
Profile* profile,
net::URLRequestContextGetter* request_context)
: render_process_id_(render_process_id),
profile_(profile),
request_context_(request_context) {
}
ChromeBenchmarkingMessageFilter::~ChromeBenchmarkingMessageFilter() {
}
bool ChromeBenchmarkingMessageFilter::OnMessageReceived(
const IPC::Message& message, bool* message_was_ok) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(ChromeBenchmarkingMessageFilter, message,
*message_was_ok)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CloseCurrentConnections,
OnCloseCurrentConnections)
IPC_MESSAGE_HANDLER_DELAY_REPLY(ChromeViewHostMsg_ClearCache, OnClearCache)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_ClearHostResolverCache,
OnClearHostResolverCache)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_EnableSpdy, OnEnableSpdy)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_ClearPredictorCache,
OnClearPredictorCache)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP_EX()
return handled;
}
void ChromeBenchmarkingMessageFilter::OnClearCache(bool preserve_ssl_host_info,
IPC::Message* reply_msg) {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
int rv = -1;
disk_cache::Backend* backend = request_context_->GetURLRequestContext()->
http_transaction_factory()->GetCache()->GetCurrentBackend();
if (backend) {
net::CompletionCallback callback =
base::Bind(&ClearCacheCallback, make_scoped_refptr(this), reply_msg);
if (preserve_ssl_host_info) {
DoomEntriesHelper* helper = new DoomEntriesHelper(backend);
helper->ClearCache(callback); // Will self clean.
return;
} else {
rv = backend->DoomAllEntries(callback);
if (rv == net::ERR_IO_PENDING) {
// The callback will send the reply.
return;
}
}
}
ChromeViewHostMsg_ClearCache::WriteReplyParams(reply_msg, rv);
Send(reply_msg);
}
void ChromeBenchmarkingMessageFilter::OnClearHostResolverCache(int* result) {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
*result = -1;
net::HostCache* cache =
request_context_->GetURLRequestContext()->host_resolver()->GetHostCache();
if (cache) {
cache->clear();
*result = 0;
}
}
// TODO(lzheng): This only enables spdy over ssl. Enable spdy for http
// when needed.
void ChromeBenchmarkingMessageFilter::OnEnableSpdy(bool enable) {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
if (enable) {
net::HttpStreamFactory::EnableNpnSpdy();
net::HttpNetworkLayer::EnableSpdy("force-alt-protocols");
} else {
net::HttpStreamFactory::EnableNpnHttpOnly();
}
}
void ChromeBenchmarkingMessageFilter::OnCloseCurrentConnections() {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
request_context_->GetURLRequestContext()->
http_transaction_factory()->GetCache()->CloseAllConnections();
}
void ChromeBenchmarkingMessageFilter::OnSetCacheMode(bool enabled) {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
net::HttpCache::Mode mode = enabled ?
net::HttpCache::NORMAL : net::HttpCache::DISABLE;
net::HttpCache* http_cache = request_context_->GetURLRequestContext()->
http_transaction_factory()->GetCache();
http_cache->set_mode(mode);
}
void ChromeBenchmarkingMessageFilter::OnClearPredictorCache(int* result) {
// This function is disabled unless the user has enabled
// benchmarking extensions.
if (!CheckBenchmarkingEnabled()) {
NOTREACHED() << "Received unexpected benchmarking IPC";
return;
}
chrome_browser_net::Predictor* predictor = profile_->GetNetworkPredictor();
if (predictor)
predictor->DiscardAllResults();
*result = 0;
}
bool ChromeBenchmarkingMessageFilter::CheckBenchmarkingEnabled() const {
static bool checked = false;
static bool result = false;
if (!checked) {
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
result = command_line.HasSwitch(switches::kEnableBenchmarking);
checked = true;
}
return result;
}
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