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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 "net/tools/dump_cache/simple_cache_dumper.h"
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/threading/thread.h"
#include "net/base/cache_type.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/disk_cache/disk_cache.h"
#include "net/tools/dump_cache/cache_dumper.h"
namespace net {
SimpleCacheDumper::SimpleCacheDumper(base::FilePath input_path,
base::FilePath output_path)
: state_(STATE_NONE),
input_path_(input_path),
output_path_(output_path),
cache_(NULL),
writer_(new DiskDumper(output_path)),
cache_thread_(new base::Thread("CacheThead")),
iter_(NULL),
src_entry_(NULL),
dst_entry_(NULL),
io_callback_(base::Bind(&SimpleCacheDumper::OnIOComplete,
base::Unretained(this))),
rv_(0) {
}
SimpleCacheDumper::~SimpleCacheDumper() {
delete(cache_);
}
int SimpleCacheDumper::Run() {
base::MessageLoopForIO main_message_loop;
LOG(INFO) << "Reading cache from: " << input_path_.value();
LOG(INFO) << "Writing cache to: " << output_path_.value();
if (!cache_thread_->StartWithOptions(
base::Thread::Options(base::MessageLoop::TYPE_IO, 0))) {
LOG(ERROR) << "Unable to start thread";
return ERR_UNEXPECTED;
}
state_ = STATE_CREATE_CACHE;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING) {
main_message_loop.Run();
return rv_;
}
return rv;
}
int SimpleCacheDumper::DoLoop(int rv) {
do {
State state = state_;
state_ = STATE_NONE;
switch (state) {
case STATE_CREATE_CACHE:
CHECK_EQ(OK, rv);
rv = DoCreateCache();
break;
case STATE_CREATE_CACHE_COMPLETE:
rv = DoCreateCacheComplete(rv);
break;
case STATE_OPEN_ENTRY:
CHECK_EQ(OK, rv);
rv = DoOpenEntry();
break;
case STATE_OPEN_ENTRY_COMPLETE:
rv = DoOpenEntryComplete(rv);
break;
case STATE_CREATE_ENTRY:
CHECK_EQ(OK, rv);
rv = DoCreateEntry();
break;
case STATE_CREATE_ENTRY_COMPLETE:
rv = DoCreateEntryComplete(rv);
break;
case STATE_READ_HEADERS:
CHECK_EQ(OK, rv);
rv = DoReadHeaders();
break;
case STATE_READ_HEADERS_COMPLETE:
rv = DoReadHeadersComplete(rv);
break;
case STATE_WRITE_HEADERS:
CHECK_EQ(OK, rv);
rv = DoWriteHeaders();
break;
case STATE_WRITE_HEADERS_COMPLETE:
rv = DoWriteHeadersComplete(rv);
break;
case STATE_READ_BODY:
CHECK_EQ(OK, rv);
rv = DoReadBody();
break;
case STATE_READ_BODY_COMPLETE:
rv = DoReadBodyComplete(rv);
break;
case STATE_WRITE_BODY:
CHECK_EQ(OK, rv);
rv = DoWriteBody();
break;
case STATE_WRITE_BODY_COMPLETE:
rv = DoWriteBodyComplete(rv);
break;
default:
NOTREACHED() << "state_: " << state_;
break;
}
} while (state_ != STATE_NONE && rv != ERR_IO_PENDING);
return rv;
}
int SimpleCacheDumper::DoCreateCache() {
DCHECK(!cache_);
state_ = STATE_CREATE_CACHE_COMPLETE;
return disk_cache::CreateCacheBackend(
DISK_CACHE, CACHE_BACKEND_DEFAULT, input_path_, 0, false,
cache_thread_->message_loop_proxy(),
NULL, &cache_, io_callback_);
}
int SimpleCacheDumper::DoCreateCacheComplete(int rv) {
if (rv < 0)
return rv;
reinterpret_cast<disk_cache::BackendImpl*>(cache_)->SetUpgradeMode();
reinterpret_cast<disk_cache::BackendImpl*>(cache_)->SetFlags(
disk_cache::kNoRandom);
state_ = STATE_OPEN_ENTRY;
return OK;
}
int SimpleCacheDumper::DoOpenEntry() {
DCHECK(!dst_entry_);
DCHECK(!src_entry_);
state_ = STATE_OPEN_ENTRY_COMPLETE;
return cache_->OpenNextEntry(&iter_, &src_entry_, io_callback_);
}
int SimpleCacheDumper::DoOpenEntryComplete(int rv) {
// ERR_FAILED indicates iteration finished.
if (rv == ERR_FAILED) {
cache_->EndEnumeration(&iter_);
return OK;
}
if (rv < 0)
return rv;
state_ = STATE_CREATE_ENTRY;
return OK;
}
int SimpleCacheDumper::DoCreateEntry() {
DCHECK(!dst_entry_);
state_ = STATE_CREATE_ENTRY_COMPLETE;
return writer_->CreateEntry(src_entry_->GetKey(), &dst_entry_,
io_callback_);
}
int SimpleCacheDumper::DoCreateEntryComplete(int rv) {
if (rv < 0)
return rv;
state_ = STATE_READ_HEADERS;
return OK;
}
int SimpleCacheDumper::DoReadHeaders() {
state_ = STATE_READ_HEADERS_COMPLETE;
int32 size = src_entry_->GetDataSize(0);
buf_ = new IOBufferWithSize(size);
return src_entry_->ReadData(0, 0, buf_.get(), size, io_callback_);
}
int SimpleCacheDumper::DoReadHeadersComplete(int rv) {
if (rv < 0)
return rv;
state_ = STATE_WRITE_HEADERS;
return OK;
}
int SimpleCacheDumper::DoWriteHeaders() {
int rv = writer_->WriteEntry(
dst_entry_, 0, 0, buf_.get(), buf_->size(), io_callback_);
if (rv == 0)
return ERR_FAILED;
state_ = STATE_WRITE_HEADERS_COMPLETE;
return OK;
}
int SimpleCacheDumper::DoWriteHeadersComplete(int rv) {
if (rv < 0)
return rv;
state_ = STATE_READ_BODY;
return OK;
}
int SimpleCacheDumper::DoReadBody() {
state_ = STATE_READ_BODY_COMPLETE;
int32 size = src_entry_->GetDataSize(1);
// If the body is empty, we can neither read nor write it, so
// just move to the next.
if (size <= 0) {
state_ = STATE_WRITE_BODY_COMPLETE;
return OK;
}
buf_ = new IOBufferWithSize(size);
return src_entry_->ReadData(1, 0, buf_.get(), size, io_callback_);
}
int SimpleCacheDumper::DoReadBodyComplete(int rv) {
if (rv < 0)
return rv;
state_ = STATE_WRITE_BODY;
return OK;
}
int SimpleCacheDumper::DoWriteBody() {
int rv = writer_->WriteEntry(
dst_entry_, 1, 0, buf_.get(), buf_->size(), io_callback_);
if (rv == 0)
return ERR_FAILED;
state_ = STATE_WRITE_BODY_COMPLETE;
return OK;
}
int SimpleCacheDumper::DoWriteBodyComplete(int rv) {
if (rv < 0)
return rv;
src_entry_->Close();
writer_->CloseEntry(dst_entry_, base::Time::Now(), base::Time::Now());
src_entry_ = NULL;
dst_entry_ = NULL;
state_ = STATE_OPEN_ENTRY;
return OK;
}
void SimpleCacheDumper::OnIOComplete(int rv) {
rv = DoLoop(rv);
if (rv != ERR_IO_PENDING) {
rv_ = rv;
delete cache_;
cache_ = NULL;
base::MessageLoop::current()->Quit();
}
}
} // namespace net
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